阅读说明：本技术 一种高强度高炉铁口通道预制件及其制备方法 (The channel a kind of high intensity blast furnace Tie Kou prefabricated component and preparation method thereof ) 是由 金金 夏扬 魏军魁 程智道 佘云锋 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种高强度高炉铁口通道预制件及其制备方法,所述高炉铁口通道预制件的制备原料包括骨料、耐火材料、辅料和粘合剂,所述骨料包括矾土、电熔致密刚玉和棕刚玉,所述耐火材料包括碳化硅、碳化钛和陶瓷微粉,所述粘合剂为铝酸钙水泥,所述辅料包括尖晶石粉末、氧化铝、硅粉、沥青和防爆剂；所述电熔致密刚玉、棕刚玉和耐火材料混炼形成第一复合材料,所述矾土、耐火材料和粘合剂混炼形成第二复合材料,所述第一复合材料和第二复合材料与所述辅料再次混炼,得到所述高炉铁口通道预制件。(The invention discloses the channel a kind of high intensity blast furnace Tie Kou prefabricated components and preparation method thereof, the raw material for preparing of blast furnace taphole channel prefabricated component includes aggregate, refractory material, auxiliary material and adhesive, the aggregate includes alumina, electric smelting dense alumina and Brown Alundum, the refractory material includes silicon carbide, titanium carbide and ceramic, described adhesive is aluminous cement, and the auxiliary material includes spinel powder, aluminium oxide, silicon powder, pitch and anti-knock agent；The electric smelting dense alumina, Brown Alundum and refractory material are kneaded to form the first composite material, the alumina, refractory material and adhesive are kneaded to form the second composite material, first composite material and the second composite material are kneaded again with the auxiliary material, obtain blast furnace taphole channel prefabricated component.)

1. a kind of channel high intensity blast furnace Tie Kou prefabricated component, which is characterized in that the preparation of blast furnace taphole channel prefabricated component is former Material includes aggregate, refractory material, auxiliary material and adhesive, and the aggregate includes alumina, electric smelting dense alumina and Brown Alundum, described resistance to Fiery material includes silicon carbide, titanium carbide and ceramic, and described adhesive is aluminous cement, and the auxiliary material includes spinel powder End, aluminium oxide, silicon powder, pitch and anti-knock agent；The electric smelting dense alumina, Brown Alundum and refractory material are kneaded that form first compound Material, the alumina, refractory material and adhesive are kneaded to form the second composite material, first composite material and second compound Material is kneaded again with the auxiliary material, obtains blast furnace taphole channel prefabricated component.

2. blast furnace taphole channel according to claim 1 prefabricated component, which is characterized in that the alumina is high grade bauxite, institute State the Al of high grade bauxite₂O₃Content is greater than 90%, and grain composition is 2-3 grades, when grain composition is 3 grades, the high grade bauxite Particle are as follows: 5-10mm, 0-5mm, < 0.088mm；When grain composition be 2 grades when, the particle of the high grade bauxite are as follows: 0-10mm and < 0.088mm.

3. blast furnace taphole channel according to claim 1 prefabricated component, which is characterized in that the particle of the electric smelting dense alumina For 3-5mm, the particle of Brown Alundum is 3-8mm.

4. blast furnace taphole channel according to claim 1 prefabricated component, which is characterized in that each component in the refractory material Granular size are as follows: the purity of ceramic 1-3mm, silicon carbide≤0.05mm, titanium carbide≤0.04mm, the silicon carbide are not less than The purity of 98wt%, titanium carbide are not less than 98wt%.

5. blast furnace taphole channel according to claim 1 prefabricated component, which is characterized in that the anti-knock agent is aluminium powder, described Aluminium oxide is activated alumina, and the pitch is hard pitch.

6. blast furnace taphole channel according to claim 5 prefabricated component, which is characterized in that the particle of each component in the auxiliary material Size are as follows: the spinel powder≤0.038mm, 1-10 μm of aluminium oxide, silicon powder≤0.035mm, aluminium powder include two kinds of partial sizes < 0.05mm and 0.05-0.1mm, pitch granularity are less than 1mm.

7. blast furnace taphole channel according to claim 2 prefabricated component, which is characterized in that blast furnace taphole channel prefabricated component The parts by weight for preparing feed components are as follows: the electric smelting dense alumina be 12-16 part, Brown Alundum be 10-13 parts, alumina (< 0.088mm) is 20-25 parts, and alumina (0-5mm) is 25-30 parts, and alumina (5-10mm) is 10-15 parts, 1-5 parts of adhesive；

The parts by weight of the refractory material of the first composite material are added are as follows: the silicon carbide is 3-4 parts, and titanium carbide is 2-3 parts, pottery Porcelain micro mist is 1-3 parts；The parts by weight of the refractory material of the second composite material are added are as follows: the silicon carbide is 8-10 parts, carbonization Titanium is 3-5 parts, and ceramic is 4-7 parts；

In auxiliary material, the spinel powder be 5-8 part, aluminium oxide be 3-5 parts, silicon powder be 4-6 parts, 2-4 parts of anti-knock agent, pitch 1-2 parts.

8. blast furnace taphole channel according to claim 7 prefabricated component, which is characterized in that the spinel powder is in the height The mass fraction of the channel furnace Tie Kou prefabricated component prepared in raw material is 4-6%.

9. the preparation method of blast furnace taphole channel prefabricated component described in claim 1-8, which is characterized in that the preparation method packet Include following steps:

(1) the electric smelting dense alumina and Brown Alundum are uniformly mixed, it is mixed sequentially adds titanium carbide, silicon carbide and ceramic It closes uniformly, adds water to continue to stir evenly, obtain the first composite material；

(2) alumina of variable grain gradation is uniformly mixed, sequentially adds titanium carbide, silicon carbide and ceramic mixing Uniformly, aluminous cement then is added after mixing, adds water to continue to stir evenly, obtains the second composite material；

(3) in first composite material and the second composite material, the aluminium oxide, silicon powder, spinel powder are sequentially added And anti-knock agent, it is eventually adding the pitch, and slurry is uniformly mixed, is completely exhausted out to bubble, obtains the embryo material；

(4) embryo material, using compression moulding, obtains blast furnace taphole channel prefabricated component profile after vacuum refining；

(5) profile after evacuation, is immersed in pure water and is conserved 4-5 days；Profile is preheating to 120-130 DEG C again, then by It is gradually warming up to 400-450 DEG C to be fired, heating rate is 8-10 DEG C/min, and it is prefabricated to obtain the blast furnace taphole channel after cooling Part；

The sequence of the step (1) and (2) can exchange.

Technical field

The present invention relates to metallurgical technology fields, and in particular to a kind of high intensity blast furnace Tie Kou channel prefabricated component and its preparation side Method.

Background technique

The smelting of iron ore generally uses blast furnace process, and blast furnace ironmaking has the characteristics that at low cost, yield is high, the longevity of blast furnace Life is an important factor for determining blast furnace process cost.The key of prolonging campaign is cupola well, important set of the blast furnace taphole as blast furnace At one of the part that part and cupola well are most weak, main function is to ensure that Blast furnace slag can discharge in time.Therefore it is required that Iron mouth Yi Kaiyi is stifled, and flowing molten iron reduces iron loss vector without splash during tapping.Height of the blast furnace taphole by molten iron and clinker Temperature, mechanical erosion and chemical erosion.A large amount of molten iron and clinker are flowed out daily, iron mouth is easy to be impacted, corrodes and destroy, so It is required that iron mouth is sturdy and durable.

Traditional blast furnace iron notch uses clay brick or sillimanite brick, carries out in dismounting research in the blast furnace expired to furnace labour It was found that clay brick or sillimanite brick corrode seriously, part of deteriorating is replaced by stemming and clinker.In addition, the meeting of blast furnace taphole region Occur between taphole frame and modular tile to some extent, iron mouth channel interior leakage gas the phenomenon that, directly result in blast furnace casting Flowing molten iron dispersion splash, flue dust overflow in the process, and stokehold is influenced when serious and does the operations such as mud set and stifled iron notch, affects the peace of blast furnace Full production.Once being formed, due to the souring of Gas Flow, gas passage will be presented deterioration and become iron mouth region domain gas leak Gesture, it is therefore necessary to which iron mouth region domain gas leak is administered, it is ensured that conditions of blast furnace stable smooth operation guarantees blast furnace safety production.

In order to improve the service life of tapping hole, gas leak is prevented, the operating feature according to blast furnace taphole is needed and invades Erosion feature, develop it is a kind of last a long time, the blast furnace taphole that fire resistance is good.

Summary of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a kind of high intensity blast furnace Tie Kou channel prefabricated component and its preparations Method in the preparation process of blast furnace taphole channel prefabricated component, is that the first composite material is made in aggregate using alumina, uses electricity Molten dense alumina and Brown Alundum are that the second composite material is made in aggregate, control the partial size of the first composite material and the second composite material With reach the high intensity of the good mixed effect of two kinds of composite materials and prepared blast furnace taphole channel prefabricated component, antiscour, Air tightness performance, then cooperate the preferable auxiliary material of fire resistance, improve the fire resistance of blast furnace taphole channel prefabricated component.

The present invention provides a kind of channel high intensity blast furnace Tie Kou prefabricated component, the preparations of blast furnace taphole channel prefabricated component Raw material includes aggregate, refractory material, auxiliary material and adhesive, and the aggregate includes alumina, electric smelting dense alumina and Brown Alundum, described Refractory material includes silicon carbide, titanium carbide and ceramic, and described adhesive is aluminous cement, and the auxiliary material includes spinelle Powder, aluminium oxide, silicon powder, pitch and anti-knock agent.The electric smelting dense alumina, Brown Alundum and refractory material are kneaded that form first multiple Condensation material, the alumina, refractory material and adhesive are kneaded to form the second composite material, and first composite material and second is answered Condensation material is kneaded again with the auxiliary material, obtains blast furnace taphole channel prefabricated component.

The aggregate includes alumina, electric smelting dense alumina and Brown Alundum.Preferably, the alumina is high grade bauxite, Al₂O₃Content is greater than 90%, and the grain composition of the high grade bauxite is 2-3 grades, when grain composition is 3 grades, the high grade bauxite Grain composition are as follows: 5-10mm, 0-5mm, < 0.088mm；When grain composition is 2 grades, the grain composition of the high grade bauxite Are as follows: 0-10mm and < 0.088mm.It is a discovery of the invention that the blast furnace taphole channel prefabricated component quality prepared using the high grade bauxite Closely knit, stomata is few, and fire resistance is preferable, can resist molten iron and wash away for a long time, and the grain composition of the high grade bauxite More, the embryo material of the blast furnace taphole channel prefabricated component of preparation is more closely knit, and comprehensive performance is better.

The granular size of each component in the aggregate are as follows: electric smelting dense alumina 3-5mm, Brown Alundum 3-8mm.

The refractory material includes silicon carbide, titanium carbide and ceramic, and the particle of each component is big in the refractory material It is small are as follows: ceramic 1-3mm, silicon carbide≤0.05mm, titanium carbide≤0.04mm.The purity of the silicon carbide is not less than The purity of 98wt%, titanium carbide are not less than 98wt%.The refractory material is by that can not only improve institute in conjunction with the aggregate The fire resistance of blast furnace taphole channel prefabricated component is stated, and inevitable pore problem in aggregate can be improved, because described The addition of refractory material can be improved the sintering densification for preparing raw material and homogenization journey of blast furnace taphole channel prefabricated component It spends, biggish hole in reduction system.In addition, silicon carbide is easy to oxidize, the present invention uses the lesser titanium carbide of partial size, titanium carbide Titanium oxide is generated after oxidation, and is interacted with the clinker at blast furnace taphole, is formed one layer of fine and close high-melting-point protective layer, is improved The antioxygenic property of blast furnace taphole channel prefabricated component.

Described adhesive is aluminous cement, and aluminous cement of the invention plays the effect of adhesive and coagulant, solution Determined different aggregates and refractory material be directly kneaded be separated from each other, the problem that Combination is undesirable, and aluminous cement aquation After solidify, the intensity for improving blast furnace taphole channel prefabricated component can be assisted.In addition, the discovery that the present invention is also unexpected, Aluminous cement in the auxiliary material spinel powder and aluminium oxide interact in mixing and forming process, described High-intensitive substance is formed in the embryo material of blast furnace taphole channel prefabricated component.

The auxiliary material includes spinel powder, aluminium oxide, silicon powder, pitch and anti-knock agent, and the anti-knock agent is aluminium powder.It is described Spinel powder is a kind of refractory material of function admirable, and fusing point is high, chemical stability is good, acid-alkali-corrosive-resisting, and anti-oxidant iron is molten The ability of slag is strong, it may have preferable heat-resistant knocking stability, in addition, since the electric smelting dense alumina and Brown Alundum are in spinelle Solid solution in powder, the addition of spinel powder can be improved the first composite material and integrally preparing being uniformly mixed in raw material Degree, and then improve the compactness and elevated temperature strength of blast furnace taphole channel prefabricated component.

Preferably, the aluminium oxide is activated alumina.The silicon powder is oxidized at the working temperature generates SiO gas, And oxidation rate, prior to carbon, SiO gas makes CO be reduced to carbon, to inhibit the oxidation of carbon, plays a protective role； On the other hand, SiO gas, which can be further oxidized, generates SiO liquid phase, blocks stomata, improves consistency, and form protective layer Prevent the further intrusion of oxygen.

The explosion-proof of aluminium powder are as follows: small grain size aluminium powder reacts rapidly shape in compacting early period of blast furnace taphole channel prefabricated component At heat dissipation and exhaust capillary road, the hydrogen outburst life caused by being added because of metallic aluminium powder is effectively prevented；Bulky grain aluminium powder is being suppressed Later period further increases vent quantity, and remaining aqueous vapor is excluded rapidly, Decrepitation Phenomena is effectively prevented.The pitch is Hard pitch, granularity is less than 1mm, and during configuring the embryo material, the volatile matter in hard pitch gasifies, and in gas pressure Under the action of power, the carbon in pitch enters in the thin stomata of first composite material and the second composite material, in stomata Inner wall forms the coating of carbon, to prevent slag from permeating into thin stomata.

The granular size of each component in the auxiliary material are as follows: the spinel powder≤0.038mm, 1-10 μm of aluminium oxide, silicon Powder≤0.035mm, aluminium powder include two kinds of partial size < 0.05mm and 0.05-0.1mm.

The parts by weight for preparing feed components of blast furnace taphole channel prefabricated component are as follows: the electric smelting dense alumina (3-5mm) is 12-16 parts, and Brown Alundum (3-8mm) is 10-13 parts, and alumina (< 0.088mm) is 20-25 parts, alumina (0-5mm) It is 25-30 parts, alumina (5-10mm) is 10-15 parts, 1-5 parts of adhesive.

The parts by weight of the refractory material of the first composite material are added are as follows: the silicon carbide (≤0.05mm) is 3-4 parts, carbon Changing titanium (≤0.04mm) is 2-3 parts, and ceramic (1-3mm) is 1-3 parts.

The parts by weight of the refractory material of the second composite material are added are as follows: the silicon carbide (≤0.05mm) is 8-10 parts, Titanium carbide (≤0.04mm) is 3-5 parts, and ceramic (1-3mm) is 4-7 parts.

In auxiliary material, the spinel powder (≤0.038mm) is 5-8 parts, and (1-10 μm) of aluminium oxide is 3-5 parts, silicon powder (≤0.035mm) it is 4-6 parts, 2-4 parts of anti-knock agent, 1-2 parts of pitch.

The spinel powder is 4-6% in the mass fraction of blast furnace taphole channel prefabricated component prepared in raw material, Preferably, the mass fraction is 4-5%.

The present invention also provides the preparation method of blast furnace taphole channel prefabricated component, the preparation method includes following step It is rapid:

(1) the electric smelting dense alumina and Brown Alundum are uniformly mixed, it is micro- sequentially adds titanium carbide, silicon carbide and ceramics Powder is uniformly mixed, and is added water to continue to stir evenly, is obtained the first composite material；

(2) alumina of variable grain gradation is uniformly mixed, sequentially adds titanium carbide, silicon carbide and ceramic It is uniformly mixed, aluminous cement then is added after mixing, adds water to continue to stir evenly, obtains the second composite material；

(3) in first composite material and the second composite material, the aluminium oxide, silicon powder, spinelle are sequentially added Powder and anti-knock agent are eventually adding the pitch, and slurry are uniformly mixed, and are completely exhausted out to bubble, obtain the embryo material；

(4) embryo material is after vacuum refining, compression moulding, obtains blast furnace taphole channel prefabricated component profile；

(5) profile after evacuation, is immersed in pure water and is conserved 4-5 days；Profile is preheating to 120-130 DEG C again, It is gradually warmed up 400-450 DEG C again to be fired, heating rate is 8-10 DEG C/min, obtains the blast furnace taphole channel after cooling Prefabricated component.

The sequence of the step (1) and (2) can exchange.

Fire proofed wood is added in the aggregate when preparing the first composite material and the second composite material in the preparation method During material, different types of refractory material is sequentially added according to the sequence of particle from small to large, improves the first composite material Or the second respective uniformity of composite material, be conducive to the uniformity and compactness that improve final blast furnace taphole channel prefabricated component. It is a discovery of the invention that preparing the first composite material and the second composite material respectively, be conducive to the combination of different aggregates and refractory material, And it was found that by the method that is mixed again with the auxiliary material after the first composite material and the mixing of the second composite material, acquisition it is described The impact resistance of blast furnace taphole channel prefabricated component is stronger, solid densification, and heat-proof quality and corrosion-resistant property are good.May be due to Described adhesive first plays a role in the second composite material, then with the first composite material mix, refining, compression moulding and The different phase of vacuum maintenance is had an effect with other components in the first composite material, auxiliary material, compound is generated, so that described The chemical constituent of blast furnace taphole channel prefabricated component is mutually cooperateed with space structure, has reached the above preferable performance.

In addition, the present invention has abandoned traditional vibration formation method, and using the method for compression moulding, then cooperate pure water Maintenance is conducive to the compactness and intensity that improve blast furnace taphole channel prefabricated component, reduces hole.

Specific embodiment

Unless otherwise defined, the present invention used in all scientific and technical terms have with the present invention relates to technologies to lead The normally understood identical meaning of the technical staff in domain.Following embodiment is used to illustrate the present invention, but is not limited to the present invention.