阅读说明：本技术 一种连铸中间包挡渣部件的耐火浇注料及制备方法 (A kind of castable refractory and preparation method of continuous casting production pushing off the slag component ) 是由 季必云 汪雷 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种连铸中间包挡渣部件的耐火浇注料及制备方法,属于耐火材料技术领域。浇注料由以下重量份数配比的原料混合而成：废镁碳砖再生料：30-60份,镁橄榄砂：12-30份,镁砂粉：12-25份,碳化硅细粉：4-8份,金属硅粉：0.1-5份,硅微粉：3-6份,氧化铝微粉：2-6份,镁质结合剂：1-3份,不锈钢纤维：0.5-3份,减水剂：0.1-3份；相适应的制备方法生产的使得生产的中间包挡渣部件抗渣侵蚀性能优良、高温强度较高,热震稳定性好,使用寿命长,成本降低。(The invention discloses the castable refractories and preparation method of a kind of continuous casting production pushing off the slag component, belong to technical field of refractory materials.Castable is mixed by the raw material that following parts by weight match: waste magnesia carbon brick reworked material: 30-60 parts, magnesium olive sand: 12-30 parts, magnesia powder: 12-25 parts, carbide fine powder: 4-8 parts, metallic silicon power: 0.1-5 parts, silicon powder: 3-6 parts, alumina powder: 2-6 parts, magnesia bonding agent: 1-3 parts, stainless steel fibre: 0.5-3 parts, water-reducing agent: 0.1-3 parts；The tundish pushing off the slag component anti-scour property for produce of adaptable preparation method production is excellent, elevated temperature strength is higher, good thermal shock stability, long service life, and cost reduces.)

1. a kind of castable refractory of continuous casting production pushing off the slag component, which is characterized in that the raw material matched by following parts by weight It mixes: waste magnesia carbon brick reworked material: 30-60 parts, magnesium olive sand: 12-30 parts, magnesia powder: 12-25 parts, carbide fine powder: 4- 8 parts, metallic silicon power: 0.1-5 parts, silicon powder: 3-6 parts, alumina powder: 2-6 parts, magnesia bonding agent: 1-3 parts, stainless steel is fine Dimension: 0.5-3 parts, water-reducing agent: 0.1-3 parts.

2. a kind of castable refractory of continuous casting production pushing off the slag component according to claim 1, which is characterized in that described useless For magnesia carbon brick reworked material using waste magnesia carbon brick particulate material as raw material, the waste magnesia carbon brick particulate material is broken through sorting classification-by waste magnesia carbon brick Broken-screening-obtains after removing iron；The waste magnesia carbon brick particulate material is classified according to partial size, and includes: in parts by weight 8mm-5mm waste magnesia carbon brick particulate material: 20-30 parts, 5mm-3mm waste magnesia carbon brick particulate material: 18-27 parts, 3mm-1mm waste magnesia carbon brick Pellet: 20-32 parts.

3. a kind of castable refractory of continuous casting production pushing off the slag component according to claim 2, which is characterized in that described useless Magnesia carbon brick particulate material carries out acid soak processing, and soaking time is 1-5 days, and waste magnesia carbon brick particulate material is protected from light after the completion of impregnating dries in the shade Waste magnesia carbon brick reworked material is made in 24-48h.

4. a kind of castable refractory of continuous casting production pushing off the slag component according to claim 2, which is characterized in that described useless Content of magnesia >=55wt% in magnesia carbon brick, carbon content 10-18wt%, all iron content < 1.5wt%, water absorption rate < 2% are resistance to 1760 DEG C of fiery degree >.

5. a kind of castable refractory of continuous casting production pushing off the slag component according to claim 1-4, feature exist In, the magnesium olive sand is calcining olive sand particle or raw olivine particles, and the calcining olive sand grain diameter is 20-0mm, Raw olivine particles partial size is 8-0mm；Content of magnesia > 45wt% in the calcining olive sand particle gives birth in olivine particles Content of magnesia is > 32wt%；The partial size < 0.074mm of the carbide fine powder, SiC >=95wt% in carbide fine powder.

6. a kind of castable refractory of continuous casting production pushing off the slag component according to claim 1-4, feature exist In, the magnesia powder be fused magnesite or magnesite clinker, magnesia powder partial size < 0.074mm, content of MgO in magnesia powder >= 92wt%, CaO < 2.0wt%；The metallic silicon power partial size < 0.074mm, Si > 98.5wt% in metallic silicon power.

7. a kind of castable refractory of continuous casting production pushing off the slag component according to claim 1-4, feature exist In the alumina powder is sintering a-Al₂O₃Micro mist, the a-Al₂O₃Grain size of micropowder < 0.005mm, a-Al₂O₃In micro mist Al₂O₃> 97wt%；The partial size < 0.002mm of the silicon powder, SiO in the silicon powder₂> 95wt%.

8. a kind of castable refractory of continuous casting production pushing off the slag component according to claim 1-4, feature exist In the magnesia bonding agent is activated magnesia system vitrified bond, wherein magnesia >=55wt%, activated magnesia system ceramics Bonding agent partial size < 0.044mm；The heat-resistant stainless steel fiber is 445 stainless steel fibres, and the length of heat-resistant stainless steel fiber is 15-25mm, width 1-3mm.

9. a kind of castable refractory of continuous casting production pushing off the slag component according to claim 1, which is characterized in that described to subtract Aqua is one or more of sodium tripolyphosphate, calgon or polycarboxylate water-reducer.

10. a kind of preparation method of continuous casting production pushing off the slag component, which comprises the following steps:

S1, the molding die for preparing continuous casting production pushing off the slag component, magnesium olive sand and stainless steel fibre are put into blender, 3-6min is mixed；

S2, continue to add magnesia powder, carbide fine powder, metallic silicon power, silicon powder, alumina powder, magnesia knot into blender Mixture and water-reducing agent stir 3-5min；

S3, mixture is formed after waste magnesia carbon brick reworked material to be added to stirrer for mixing stirring 15-25min；

The water for accounting for the mixture 3.5-4.5wt% is added in S4, the mixture into blender, stirs 10-15min, obtains The castable refractory of tundish pushing off the slag component；

S5, the molding die that castable refractory is poured into ready continuous casting production pushing off the slag component, the fire resisting in mold is poured Material feeding is vibrated to surface bleeding, and time of vibration is greater than 10min；

S6, the castable refractory that will vibrate completion are protected from light standing together with mold and at least demould afterwards for 24 hours, by fire resisting molding after demoulding It is roasting to enter kilning after castable avoid light place 48-60h, baking is completed to obtain continuous casting production pushing off the slag component.

Technical field

The invention belongs to technical field of refractory materials, more particularly to a kind of refractory casting of continuous casting production pushing off the slag component Material and preparation method.

Background technique

Continuous casting production is a transitional facility for being transformed into continuous operation in steelmaking process by intermittently operated, is had steady Pressure, storage and distribution molten steel, guarantee the effects of going on smoothly of molten steel continuous casting.Tundish controls steel as continuous casting process The clean key link of liquid, reasonable MOLTEN STEEL FLOW can effectively extend residence time of the molten steel in tundish, promote to be mingled with Object floats, uniform molten steel temperature and ingredient.As user requires steel quality increasingly strict, tundish is simple by one Transient response device, which is gradually transformed into one, has regulation and control molten steel temperature and ingredient, promotes the essence of steel inclusion removal Refine reactor.

It is to substantially effectively utilize tundish volume, effectively inhibition molten steel that pushing off the slag component is arranged in continuous casting production Circulation is formed, inclusion floating is promoted.Setting slag weir has following several effects: (1) molten steel is appropriately extended in tundish Residence time makes the field trash of molten steel towel and asks sufficiently collision when having enough, aggregation, floats, with cleaning molten steel；(2) make steel stream Reach each stream middle water containing opening when ask essentially identical, with the temperature of uniformly standby stream, reduce bleedout and knot plug phenomenon；(3) change The Flow Field Distribution of tundish makes molten steel hydrodynamic regime reach best；(4) dead zone in tundish bottom region is eliminated；It reduces Stagnant area increases laminar region；(5) the caused strong whirlpool of ladle beam impact is limited in regional area, prevents turbulent expansion It dissipates and causes surface wave and bits are involved in inside molten steel, it can a degree of purifying of steel.The general root of pushing off the slag component castable High temperature mechanical strength with higher and baking intensity, preferable antistrip performance and slag corrosion resistance are answered according to its handling characteristics Performance.

Existing slag trap castable mostly uses greatly magnesia and corundum, high grade bauxite to mix, and manufactured slag trap uses Service life is shorter, and anti-molten steel erosion performance and elevated temperature strength are poor, while being also possible to that molten steel is caused to be mingled with.Chinese Patent Application No. Are as follows: 201910071941.7, the applying date are as follows: 2019.01.24 " a kind of anti-high basicity slag tundish slag trap castable and its Preparation method " discloses a kind of slag trap castable and preparation method corroded for anti-high alkalinity steel slag；Castable raw material is pressed It include 50-80 parts of alumine according to parts by weight meter, 5-15 parts of alumina spinelle fine powder of sintering, 3-8 parts of magnesite clinker particle, 3-8 parts of magnesite clinker fine powder, α-Al₂O₃6-12 parts of micro mist, 2-6 parts of aluminate cement, 0.5-1 parts of silicon powder, stainless steel fibre 0-3 parts, 0-0.2 parts of anti-knock agent, 0.1~0.4 part of water-reducing agent.It is good using magnesium aluminate spinel alkali resistance steel slag erosion performance Characteristic be prepared for can satisfy high alkalinity steel slag using addition Pre-synthesized spinel and in situ spinel technology The baking expense of barricade is effectively reduced in the tundish slag wall of requirement, product, improves the yield rate of barricade product；But The cost is relatively high.

Chinese Patent Application No. are as follows: 201711298825.6, a kind of applying date are as follows: " tundish pushing off the slag of 2017.12.08 Plate castable and its application method " discloses a kind of tundish slag wall castable, by weight percentage includes with the following group Point: waste magnesia carbon brick reworked material 40-60%, magnesian 20-40%, bonding agent 5-10%, industry silicon ash 1-3% and aluminium oxide Powder 6-9%.Slag blocking wall intensity made of it is poured is high, service wear is low, the relatively traditional slag blocking wall of service life is longer；But its Impurity is more, and Metal in Tundish is be easy to cause to be mingled with, and then influences molten steel composition.

Summary of the invention

1. to solve the problems, such as

At high cost for existing tundish pushing off the slag component castable, slag corrosion resistance ability is poor, the short problem of service life, this Invention provides a kind of castable refractory of continuous casting production pushing off the slag component, and castable is mainly with magnesite clinker, forsterite, useless Magnesia carbon brick reworked material, magnesia powder, SiC etc. are raw material, so that the slag trap castable anti-scour property of production is excellent, high Warm intensity is higher, good thermal shock stability, long service life, and cost reduces.

Another object of the present invention is to provide a kind of preparation method of continuous casting production pushing off the slag component, obtained pushing off the slag portion Part service life does not crack up to 35h or more, block of not perforating down.

2. technical solution

To solve the above-mentioned problems, the technical solution adopted in the present invention is as follows:

A kind of castable refractory of continuous casting production pushing off the slag component of the invention, is mixed by the raw material that following parts by weight match It closes: waste magnesia carbon brick reworked material: 30-60 parts, magnesium olive sand: 12-30 parts, magnesia powder: 12-25 parts, carbide fine powder: 4-8 Part, metallic silicon power: 0.1-5 parts, silicon powder: 3-6 parts, alumina powder: 2-6 parts, magnesia bonding agent: 1-3 parts, stainless steel is fine Dimension: 0.5-3 parts, water-reducing agent: 0.1-3 parts.

As a preference of the present invention, the waste magnesia carbon brick reworked material is using waste magnesia carbon brick particulate material as raw material, the useless magnesium carbon Brick particulate material is crushed by waste magnesia carbon brick through sorting classification-, and-screening-obtains after removing iron；The waste magnesia carbon brick particulate material is according to partial size It is classified, and in parts by weight includes: 8mm-5mm waste magnesia carbon brick particulate material: 20-30 parts, 5mm-3mm waste magnesia carbon brick Particulate material: 18-27 parts, 3mm-1mm waste magnesia carbon brick particulate material: 20-32 parts.

As a preference of the present invention, the waste magnesia carbon brick particulate material carries out acid soak processing, soaking time is 1-5 days, Waste magnesia carbon brick particulate material is protected from light the 24-48h that dries in the shade after the completion of impregnating and waste magnesia carbon brick reworked material is made.

As a preference of the present invention, content of magnesia >=55wt% in the waste magnesia carbon brick, carbon content 10-18wt%, 1760 DEG C of all iron content < 1.5wt%, water absorption rate < 2%, refractoriness >.

As a preference of the present invention, the magnesium olive sand is calcining olive sand particle or raw olivine particles, the calcining Olive sand grain diameter is 20-0mm, and raw olivine particles partial size is 8-0mm；Magnesia contains in the calcining olive sand particle > 45wt% is measured, content of magnesia is > 32wt% in raw olivine particles；The partial size < 0.074mm of the carbide fine powder, SiC >=95wt% in carbide fine powder.

As a preference of the present invention, the magnesia powder be fused magnesite or magnesite clinker, magnesia powder partial size < 0.074mm, Content of MgO >=92wt% in magnesia powder, CaO < 2.0wt%；The metallic silicon power partial size < 0.074mm, Si in metallic silicon power > 98.5wt%.

As a preference of the present invention, the alumina powder is sintering a-Al₂O₃Micro mist, the a-Al₂O₃Grain size of micropowder < 0.005mm, a-Al₂O₃Al in micro mist₂O₃> 97wt%；The partial size < 0.002mm of the silicon powder, SiO in the silicon powder₂> 95wt%.

As a preference of the present invention, the magnesia bonding agent be activated magnesia system vitrified bond, wherein magnesia >= 55wt%, activated magnesia system vitrified bond partial size < 0.044mm；The heat-resistant stainless steel fiber is that 445 stainless steels are fine Dimension, the length of heat-resistant stainless steel fiber are 15-25mm, width 1-3mm.

As a preference of the present invention, the water-reducing agent is in sodium tripolyphosphate, calgon or polycarboxylate water-reducer It is one or more kinds of.

A kind of preparation method of continuous casting production pushing off the slag component of the invention, comprising the following steps:

S1, the molding die for preparing continuous casting production pushing off the slag component, magnesium olive sand and stainless steel are put into blender 3-6min is mixed in fiber；

S2, continue to add magnesia powder, carbide fine powder, metallic silicon power, silicon powder, alumina powder, magnesium into blender Matter bonding agent and water-reducing agent stir 3-5min；

S3, mixture is formed after waste magnesia carbon brick reworked material to be added to stirrer for mixing stirring 15-25min；

The water for accounting for the mixture 3.5-4.5wt% is added in S4, the mixture into blender, stirs 10-15min, Obtain the castable refractory of tundish pushing off the slag component；

S5, the molding die that castable refractory is poured into ready continuous casting production pushing off the slag component, will be resistance in mold Fiery castable is vibrated to surface bleeding, and (bleeding refers in refractory concrete (castable refractory) work progress, due to vibrating ramming And rise one layer light dilute slurries phenomenon in surface of material.It is mainly generated since particles of aggregates constantly sinks.Bleeding Phenomenon shows that castable refractory has reached the degree of denser through vibrating, and internal gas has largely been excluded, the big portion of hole Divide and filled by little particle or fluid), time of vibration is greater than 10min；

S6, the castable refractory that will vibrate completion are protected from light standing together with mold and at least demould afterwards for 24 hours, will be molding after demoulding It is roasting to enter kilning after castable refractory avoid light place 48-60h, baking is completed to obtain continuous casting production pushing off the slag component.

Pushing off the slag component described herein includes but is not limited to slag trap, slag blocking wall, slag weir and pushing off the slag bucket.

3. beneficial effect

Compared with the prior art, the invention has the benefit that

(1) a kind of castable refractory of continuous casting production pushing off the slag component of the invention, waste magnesia carbon brick are given up after processing Magnesia carbon brick particulate material after surface active, is combined between bonding agent and other raw materials using the waste magnesia carbon brick particulate material of acidleach Rapidly, castable intensity with higher and corrosion resistance；

(2) castable refractory of a kind of continuous casting production pushing off the slag component of the invention, addition by metallic silicon power is to pouring Carbon in material feeding is protected, and anti-blocking is excessively aoxidized, and improves its slag resistance；

(3) castable refractory of a kind of continuous casting production pushing off the slag component of the invention, dispersing agent use aluminum oxide and silicon Oxide shares, and the oxidation resistance for pushing off the slag component of greatly having refreshed oneself improves thermal shock resistance and resistance to steel, scouring punching Brush performance；

(4) castable refractory of a kind of continuous casting production pushing off the slag component of the invention, metallic silicon power be added castable in, It is not easy to combine with water, water-reducing agent uses the content for making water to reduce, and plays and prevents to a greater extent in castable conducive to metallic silicon power The effect of oxidation；

(5) preparation method of a kind of continuous casting production pushing off the slag component of the invention, by useless after using ladle working lining Magnesia carbon brick is recycled, and tundish pushing off the slag component castable is prepared using waste magnesia carbon brick reworked material as raw material, has life At low cost, simple production process, energy saving advantage are produced, and tundish pushing off the slag strength of parts obtained is high, service wear Low, long service life.

Specific embodiment

Hereafter exemplary embodiment of the present invention is described in detail.Although these exemplary embodiments are by sufficiently in detail It carefully describes so that those skilled in the art can implement the present invention, it is to be understood that other embodiments can be realized and can be Do not depart from the case where the spirit and scope of the present invention that various changes can be made to the present invention.Hereafter more to the embodiment of the present invention Detailed description is not limited to required the scope of the present invention, and just to be illustrated and do not limit pair The description of the features of the present invention and feature to propose to execute best mode of the invention, and is sufficient to make those skilled in the art It can implement the present invention.Therefore, the scope of the invention is only defined by the appended claims.

Hereafter detailed description of the present invention and example embodiment are illustrated.

A kind of castable refractory of continuous casting production pushing off the slag component of the invention, raw material form in parts by weight, As shown in table 1:

1 continuous casting production pushing off the slag component castable refractory raw material composition and ratio of table

The raw material components of above-described embodiment meet following proportion:

Waste magnesia carbon brick reworked material: 30-60 parts, magnesium olive sand: 12-30 parts, magnesia powder: 12-25 parts, carbide fine powder: 4-8 Part, metallic silicon power: 0.1-5 parts, silicon powder: 3-6 parts, alumina powder: 2-6 parts, magnesia bonding agent: 1-3 parts, stainless steel is fine Dimension: 0.5-3 parts, water-reducing agent: 0.1-3 parts.

The castable raw material components of each embodiment are all satisfied claimed below simultaneously:

Waste magnesia carbon brick reworked material: waste magnesia carbon brick reworked material using waste magnesia carbon brick particulate material as raw material, waste magnesia carbon brick particulate material by It is broken that waste magnesia carbon brick is sorted classification-, and-screening-obtains after removing iron；Waste magnesia carbon brick particulate material is classified according to partial size, and is pressed Include: 8mm-5mm waste magnesia carbon brick particulate material according to parts by weight meter: 20-30 parts, 5mm-3mm waste magnesia carbon brick particulate material: 18-27 Part, 3mm-1mm waste magnesia carbon brick particulate material: 20-32 parts.It is broken that waste magnesia carbon brick is sorted classification-, and-screening-obtains useless magnesium after removing iron Carbon brick particulate material, be classified to waste magnesia carbon brick-being crushed-and sieving is waste magnesia carbon brick particulate material partial size in order to obtain needs, no With partial size waste magnesia carbon brick particulate material matched after so that castable combine it is even closer, and in waste magnesia carbon brick particulate material In use process, partial size is excessive, influences to mix, therefore the maximum particle diameter of waste magnesia carbon brick particulate material is arranged in 8mm, in different grains During diameter carries out the proportion of parts by weight, 8mm-5mm waste magnesia carbon brick particulate material: 20-30 parts, 5mm-3mm waste magnesia carbon brick particle Material: 18-27 parts, 3mm-1mm waste magnesia carbon brick particulate material: 20-32 parts, different-grain diameter can mix very well, compared with the useless magnesium of small particle Carbon brick particulate material is filled in the gap of larger particles waste magnesia carbon brick particulate material, in conjunction with even closer.

Waste magnesia carbon brick particulate material carries out acid soak processing, and soaking time is 1-5 days, and waste magnesia carbon brick particulate material, which is impregnated, to be completed After be protected from light the 24-48h that dries in the shade waste magnesia carbon brick reworked material be made.Acidleach processing is carried out to proportioned waste magnesia carbon brick particulate material, it can be with The impurity for removing waste magnesia carbon brick particulate material to a certain extent, improves the surface-active of waste magnesia carbon brick particulate material, carries out in castable The firm time of castable can be effectively reduced in casting process, so that the early stage of casting complete, intensity are relatively high.

Content of magnesia >=55wt% in waste magnesia carbon brick, carbon content 10-18wt%, all iron content < 1.5wt%, water suction 1760 DEG C of rate < 2%, refractoriness >.Component requirements are carried out to initial feed waste magnesia carbon brick, magnesia carbon brick after use, can be adjoint A large amount of impurity is given up using corresponding waste magnesia carbon brick as the influence for avoiding impurity to castable performance as far as possible when raw material, is needed Content of magnesia can effectively reduce the presence of impurity in waste magnesia carbon brick more than or equal to 55wt% in magnesia carbon brick.And phosphorus content is gear The important embodiment of slag component, the too low resistance to slag that will cause the pushing off the slag component finally obtained of carbon content is poor, guarantees that its resistance to slag needs To guarantee carbon content to a certain extent, but carbon content is also unsuitable excessively high, excessively high carbon content can reduce the content of magnesia. For waste magnesia carbon brick due to being used as refractory material to use, molten steel is readily adsorbed in its surface, or permeates wherein and coagulate Gu iron can melt when tundish reuses, cause have pit-hole on pushing off the slag component, resists the ability that molten steel corrodes and become Weak, service life reduces, therefore needs to control all iron content in 1.5wt% or less.Raw material of the waste magnesia carbon brick as castable, It needs to contact with water, water absorption rate is excessively high, will increase the use of water, and excessive water is added in castable also will affect castable Characteristic.The material feeding of pushing off the slag component needs certain refractoriness as a kind of refractory material, and waste magnesia carbon brick is as in castable Primary raw material, the refractoriness by controlling waste magnesia carbon brick can readily control the refractoriness of pushing off the slag component.

Magnesium olive sand: magnesium olive sand is calcining olive sand particle or raw olivine particles, and calcining olive sand grain diameter is 20-0mm (includes maximum value 20, does not include that 0), raw olivine particles partial size is that (0) including maximum value 8 does not include to 8-0mm；It forges Content of magnesia > 45wt% in olive sand particle is burnt, content of magnesia is > 32wt% in raw olivine particles.Magnesium olive sand The calcining olive sand particle sold in the market or raw olivine particles can be used, magnesium olive sand and waste magnesia carbon brick reworked material are total With aggregate as castable, the combination effect that the partial size of magnesium olive sand is excessive to be will cause between itself and other substance is bad, logical The intervention for limiting the content reduction impurity of magnesia is crossed, the castable quality of acquisition is improved.

Magnesia powder: magnesia powder is fused magnesite or magnesite clinker, magnesia powder partial size < 0.074mm, content of MgO in magnesia powder >=92wt%, CaO < 2.0wt%.In use, the content of magnesia is higher, and impurity is relatively fewer for magnesia powder, together When crystal habit it is preferable, consistency is high, effectively combines conducive to other compositions in castable, the presence of simultaneous oxidation calcium can make Obtain castable dusting cracking, it is necessary to the content of strict control calcium oxide.

Alumina powder is sintering a-Al₂O₃Micro mist, a-Al₂O₃Grain size of micropowder < 0.005mm, a-Al₂O₃Al in micro mist₂O₃ > 97wt%.Alumina powder can react generation spinelle with magnesia, and intensity is high, the work with certain slag corrosion resistance With improving the corrosion resisting property of castable, play the role of dispersing agent to a certain extent in castable.Preferably, a-Al₂O₃ Micro mist is multimodal a-Al₂O₃Micro mist, in use multimodal a-Al₂O₃Common distribution is in castable between micro mist and silicon powder In, the hydrophobicity of metallic silicon power in castable can be improved, so that can preferably be combined between metallic silicon power and water.

(metallic silicon is also known as silicon metal or industrial silicon, is mainly used for closing as non-iron-based for carbide fine powder, metallic silicon power The additive of gold.Metallic silicon is the product smelted in electrothermal furnace by quartz and coke, and the content of principal component element silicon exists 98% or so (in recent years, si content 99.99% be also contained in metallic silicon), remaining impurity are iron, aluminium, calcium etc.) and silicon Micro mist: the partial size < 0.074mm of carbide fine powder, SiC >=95wt% in carbide fine powder；Metallic silicon power partial size < 0.074mm, Si > 98.5wt% in metallic silicon power；The partial size < 0.002mm of silicon powder, SiO in silicon powder₂> 95wt%.Silicon Micro mist under the action of water, is formed silicon -ol base (Si-OH), and be dissociated into Si-O- and H+ in water, simultaneously because its particle Degree is micron order, it is easy to form the micelle structure for having electric double layer.Form stable complex compound with magnesia particle, have compared with High intensity.Cause short texture to alleviate the oxidation of magnesia carbon brick, at the same improve tundish pushing off the slag component castable to slag and The erosion resistibility of steel adds carbide fine powder and metallic silicon power.Since under aerobic state, the priority of oxidation is gold Belong to silicon powder > silicon carbide > carbon, mechanism is to form SiO after silicon powder aoxidizes₂Protective film protects the carbon in refractory material, delays It, which is aoxidized, carries out.The presence of metallic silicon power is not consumed carbon content, maintains the resistance to slag of tundish pushing off the slag component, effectively The service life for extending tundish pushing off the slag component.Silicon powder plays the role of dispersing agent in castable, micro- with aluminium oxide There is certain difference on powder diameter, the dispersing agent of different-grain diameter makes dispersing agent effect in conjunction with other raw materials in castable More preferably.

Magnesia bonding agent: magnesia bonding agent is activated magnesia system vitrified bond, wherein magnesia >=55wt%, activity Magnesia system vitrified bond partial size < 0.044mm.Suitable magnesia bonding agent can effectively improve castable routine object Rationality energy improves its anti-permeability performance and thermal shock resistance.

Stainless steel fibre: heat-resistant stainless steel fiber is 445 stainless steel fibres, and the length of heat-resistant stainless steel fiber is 15- 25mm, width 1-3mm.Intensity and thermal shock resistance can be improved in stainless steel fibre in castable refractory, so that overall structure It stabilizes, its size is defined, the performance of castable can be improved, is avoided in refractory material because it is oxidized or melts Hole is formed after change, causes refractory material that quality risk occurs.

Water-reducing agent: water-reducing agent is one or more of sodium tripolyphosphate, calgon or polycarboxylate water-reducer. The additional amount of water in castable can be reduced, metallic silicon power is not easy to combine, the use of water-reducing agent in castable is added with water So that the content of water is reduced, anti-oxidation effect is played to a greater extent in castable conducive to metallic silicon power.

According to the constituent of above-mentioned castable, a kind of preparation method of continuous casting production pushing off the slag component of the invention, packet Include following steps:

S1, the molding die for preparing continuous casting production pushing off the slag component, magnesium olive sand and stainless steel are put into blender 3-6min is mixed in fiber；

S2, continue to add magnesia powder, carbide fine powder, metallic silicon power, silicon powder, alumina powder, magnesium into blender Matter bonding agent and water-reducing agent stir 3-5min；

S3, mixture is formed after waste magnesia carbon brick reworked material to be added to stirrer for mixing stirring 15-25min；

The water for accounting for above-mentioned mixture 3.5-4.5wt% is added in S4, the mixture into blender, stirs 10-15min, Obtain the castable refractory of tundish pushing off the slag component；

S5, the molding die that castable refractory is poured into ready continuous casting production pushing off the slag component, will be resistance in mold Fiery castable is vibrated to surface bleeding, and time of vibration is greater than 10min；

S6, the castable refractory that will vibrate completion are protected from light standing together with mold and at least demould afterwards for 24 hours, will be molding after demoulding It is roasting to enter kilning after castable refractory avoid light place 48-60h, baking is completed to obtain continuous casting production pushing off the slag component.

The waste magnesia carbon brick reworked material in the preparation process for carrying out continuous casting production pushing off the slag component, in order to guarantee waste magnesia carbon brick again The surface-active of raw material, it is necessary to the order of addition of strict control raw material, since waste magnesia carbon brick reworked material holds during stirring Pelletizing shape is easily formed, is polymerized to after pelletizing shape, influences its surface-active, therefore waste magnesia carbon brick reworked material is needed as last a kind of Raw material is added blender and is stirred, and the structure size of magnesium olive sand and stainless steel fibre is relatively large, needs first to mix to stir It mixes, just can ensure that uniform component in castable.