阅读说明：本技术 含有钢水的液态钢渣的风淬粒化方法 (The wind quenching granulating method of liquid steel slag containing molten steel ) 是由 戈文荪 梁新腾 陈炼 贾子松 于 2019-10-11 设计创作，主要内容包括：本发明涉及钒渣风淬方法领域,尤其是一种高效易行,粒化效果好的含有钢水的液态钢渣的风淬粒化方法,包括如下步骤：a、将含有钢水的液态钢渣置于液渣罐内,打开风嘴并缓慢倾倒出液渣罐内的液态钢渣,液态钢渣经溜槽流至溜槽末端并被风嘴送出的强风粒化而实现风淬,随后强制冷却；其中,当有烟尘出现时,风嘴送出的强风立即切换成氮气强风并继续粒化处理；b、待冷却至150℃以下后,对得到的粒化料进行收集,再经筛分分级,并将冷却至室温的分级钢渣粒化成品依类装袋入库待用,铁料粒化品返回炼钢利用。本发明在实际使用时操作简单,可以很好的实现含有钢水的液态钢渣处理的高效易行,本发明尤其适用于含有钢水的液态钢渣的风淬粒化工艺之中。(The present invention relates to vanadium slag wind quenching method fields; it is especially a kind of efficiently easy; it is granulated the wind quenching granulating method of the good liquid steel slag containing molten steel of effect; include the following steps: a, the liquid steel slag containing molten steel is placed in melt cinder tank; the liquid steel slag opening tuyere and being slowly poured out in melt cinder tank; liquid steel slag flow to chute end through chute and is granulated by the high wind that tuyere is sent out and realizes wind quenching, then forces cooling；Wherein, when there is flue dust to occur, the high wind that tuyere is sent out switches to nitrogen high wind immediately and continues granulated processed；B, after being cooled to 150 DEG C or less, obtained pellet is collected, then screened classification, and the classification granulating steel slag finished product that will be cooled to room temperature is stand-by according to class pack storage, iron charge is granulated product return steel-making and utilizes.The present invention is easy to operate in actual use, can be very good to realize the efficient easy of the liquid steel slag processing containing molten steel, present invention is particularly suitable among the wind quenching granulating technique of the liquid steel slag containing molten steel.)

1. the wind quenching granulating method of the liquid steel slag containing molten steel, which comprises the steps of:

A, the liquid steel slag containing molten steel is placed in melt cinder tank, the liquid steel opening tuyere and being slowly poured out in melt cinder tank Slag, liquid steel slag flow to chute end through chute and are granulated by the high wind that tuyere is sent out and realize wind quenching, subsequent liquid steel slag quilt High wind brings forced cooling chamber into and forces cooling；Wherein, when there is flue dust to occur, it is strong that the high wind that tuyere is sent out switches to nitrogen immediately Wind simultaneously continues granulated processed；

B, after being cooled to 150 DEG C or less, obtained pellet is collected, then through chain transport grading plant screening point Grade, and the classification granulating steel slag finished product that will be cooled to room temperature is stand-by according to class pack storage, iron charge granulation product return to steel-making and utilize.

2. the wind quenching granulating method of the liquid steel slag containing molten steel as described in claim 1, it is characterised in that: in step a, liquid Liquid steel slag temperature range in slag ladle is 1350~1600 DEG C.

3. the wind quenching granulating method of the liquid steel slag containing molten steel as described in claim 1, it is characterised in that: in step a, liquid Liquid steel temperature range under state steel slag is 1550~1650 DEG C.

4. the wind quenching granulating method of the liquid steel slag containing molten steel as described in claim 1, it is characterised in that: in step a, also Including power-assisted tuyere, the pressure limit for the high wind that tuyere and power-assisted tuyere are sent out is 0.4~0.6MPa.

5. the wind quenching granulating method of the liquid steel slag containing molten steel as described in claim 1, it is characterised in that: in step a, liquid The rate of toppling over of liquid steel slag in slag ladle is 10~70t/h.

6. the wind quenching granulating method of the liquid steel slag containing molten steel as described in claim 1, it is characterised in that: in step a, by force Indoor pressure cooling medium range is 0.3~0.6MPa to refrigeration.

7. the wind quenching granulating method of the liquid steel slag containing molten steel as described in claim 1, it is characterised in that: in step a, when When having flue dust to occur, the nitrogen high wind pressure limit that tuyere is sent out is 1.0~1.5MPa.

8. the wind quenching granulating method of the liquid steel slag containing molten steel as claimed in claim 7, it is characterised in that: further include power-assisted Tuyere, when there is flue dust to occur, the nitrogen high wind pressure limit that power-assisted tuyere is sent out is 1.0~1.5MPa.

9. the wind quenching granulating method of the liquid steel slag containing molten steel as described in claim 1, it is characterised in that: in step a, often After tank contains the liquid steel slag wind quenching of molten steel, supplements in next tank liquid vanadium slag to melt cinder tank and handled immediately.

10. the wind quenching granulating method of the liquid steel slag containing molten steel as described in claim 1, it is characterised in that: in step a, Every tank slag processing time range is between 10~60min.

Technical field

The present invention relates to vanadium slag wind quenching method field, the wind quenching granulation sides of especially a kind of liquid steel slag containing molten steel Method.

Background technique

Steel slag be steel-making generate by-product, using silicate, ferrite as main component, about the 6% of output of steel~ 12%.Currently, steel slag mainly passes through the stewing method of steel vanadium heat and vanadium hot application method (aquation is cooling to promote slag iron separation) centralized processing.Heat is stewing The method processing time is longer, is 4~8h.After slag iron separation selects iron, curing steel-making slag powder is mainly used as production cement, and small part is for building Build material；Iron charge returns to steel-making and utilizes.Two kinds of technique labor intensity are high, and utilization rate of steel slag is lower, and heat can not benefit in slag With.In addition, Technology of Steel Slag Processing also mainly has disk to sprinkle method, water quenching, drum process, wind quenching method and granulating wheel method etc..These techniques In, consider from simple process, small investment angle, generallys use hot application method, the bored method of heat, water quenching；Consider from the physical state of slag, The preferable steel slag of mobility can be used disk and sprinkle method, water quenching, drum process, wind quenching method, granulating wheel method, wherein the bored method of heat or wind quenching The high steel slag of the available good security of method, activity.

There is research in the country such as Japan, Germany, Sweden, South Korea to liquid slag air quenching technology.Nippon, Kawasaki system Iron, Sumitomo Metal Industries etc. have carried out the granulation practice of blast furnace slag wind quenching, and core apparatus is wind-tunnel, and basic granulation is slag in wind It dispelled in hole by air stream, be granulated rapidly, dispersion plate and wind-tunnel the inner wall collision arranged in slag particle and wind-tunnel are fallen, cold with lower part But after air heat exchange, wind-tunnel is discharged.This method processing capacity is big, and treated, and slag can make cement raw material, and replace sand material Deng, can significantly improve steel slag value.

It is domestic to be concentrated mainly on steel slag air quenching aspect for the research of liquid slag air quenching technology at present.Liquid slag air quenching refers to Under the powerful impact force of high pressure draught and cooling effect, melt is crushed by the effects of passing through shearing, while slag and high pressure gas Body heat exchange is finally reached the purpose of slag granulating and waste heat recycling.It is lasting that the key of liquid slag air quenching is that spray head can provide High pressure draught, and there is the reasonable gas flowfield regularity of distribution, liquid slag air quenching will receive gas jet, gas flow, spray The influence of the factors such as header structure, liquid slag physical characteristic.Wind crush method processing obtain slag particle partial size is smaller, particle diameter distribution model Enclose relatively narrow, the slag condensation rate of processing is most fast, and also the most thoroughly, each crystalline phase distribution is uniform, and crystal grain is very for free cao resolution It is tiny.Meanwhile pellet hardness is larger, other opposite processing modes, crust block often will appear timeliness phase transformation and structural rearrangement, recombinate Principal crystalline phase afterwards is mainly dicalcium silicate, and crystal grain becomes larger.Wherein, slag is handled with wind quenching method, is such as done using different gas The broken medium of wind, there are larger differences in performance for obtained crust block particle.Such as using air or pure oxygen as medium, slag oxidation is acute It is strong, in crust block iron based on ferric iron, subsequent iron component substantially can not magnetic separation recovery, iron loss is larger.Such as using nitrogen as medium, then Iron is based on ferrous iron in crust block, and has a small amount of metallic iron to coexist therewith, can the partially recycled metallic iron of magnetic separation after timeliness phase transformation. When process broken using wind, it is desirable that slag has good mobility and low viscosity.Therefore, existing processing mode, it tends to be difficult to Reach actual process demand.

Summary of the invention

Technical problem to be solved by the invention is to provide a kind of efficiently easy, the granulation good liquid containing molten steel of effect The wind quenching granulating method of steel slag.

The technical solution adopted by the present invention to solve the technical problems is: the wind quenching granulation side of the liquid steel slag containing molten steel Method includes the following steps: a, the liquid steel slag containing molten steel is placed in melt cinder tank, opens tuyere and melt cinder tank is slowly poured out Interior liquid steel slag, liquid steel slag flow to chute end through chute and are granulated by the high wind that tuyere is sent out and realize wind quenching, then Liquid steel slag brings forced cooling chamber by high wind and forces cooling；Wherein, when there is flue dust to occur, the high wind that tuyere is sent out is cut immediately It changes nitrogen high wind into and continues granulated processed；B, after being cooled to 150 DEG C or less, obtained pellet is collected, then passes through Chain transports grading plant sieve classification, and the classification granulating steel slag finished product that will be cooled to room temperature is stand-by according to class pack storage, iron Expect that granulation product return to steel-making and utilize.

Further, the liquid steel slag temperature range in melt cinder tank is 1350~1600 DEG C in step a.

Further, the liquid steel temperature range under liquid steel slag is 1550~1650 DEG C in step a.

Further, further including power-assisted tuyere, the pressure limit for the high wind that tuyere and power-assisted tuyere are sent out in step a For 0.4~0.6MPa.

Further, the rate of toppling over of the liquid steel slag in melt cinder tank is 10~70t/h in step a.

Further, the pressure cooling medium range in forced cooling chamber is 0.3~0.6MPa in step a.

Further, in step a, when there is flue dust to occur, the nitrogen high wind pressure limit that tuyere is sent out is 1.0~ 1.5MPa。

Further, further include power-assisted tuyere, when there is flue dust to occur, the nitrogen high wind pressure model of power-assisted tuyere submitting It encloses for 1.0~1.5MPa.

Further, after every tank contains the liquid steel slag wind quenching of molten steel, supplementing next tank liquid immediately in step a In state vanadium slag to melt cinder tank and handled.

Further, every tank slag processing time range is between 10~60min in step a.

The beneficial effects of the present invention are: the present invention is easy to operate in actual use, it can be very good to realize and contain molten steel Liquid steel slag processing it is efficient easy, meanwhile, final granulation effect is good, thus cost-efficiently processing steel slag.Gained The powder grade product arrived can making cement produce ingredient, also can return to steel-making use.Wherein, slag charge granulated product intensity is high, density For 3~6g/cm³, sand mould material can also be done, sand-blast material and cement material etc. are widely used.Iron charge is granulated product and returns to steel-making It utilizes, realizes making full use of for material.Present invention is particularly suitable among the wind quenching granulating technique of the liquid steel slag containing molten steel.

Specific embodiment

The wind quenching granulating method of liquid steel slag containing molten steel includes the following steps: a, by the liquid steel slag containing molten steel It is placed in melt cinder tank, the liquid steel slag opening tuyere and being slowly poured out in melt cinder tank, liquid steel slag flow to chute end through chute It holds and is granulated by the high wind that tuyere is sent out and realizes wind quenching, subsequent liquid steel slag brings forced cooling chamber by high wind and forces cooling； Wherein, when there is flue dust to occur, the high wind that tuyere is sent out switches to nitrogen high wind immediately and continues granulated processed；B, it is cooled to After 150 DEG C or less, obtained pellet is collected, then transports grading plant sieve classification through chain, and will be cooled to room The classification granulating steel slag finished product of temperature is stand-by according to class pack storage, and iron charge granulation product return to steel-making and utilize.

In practical operation, the vanadium slag wind quenching device of use is generally comprised: chute, tuyere, power-assisted tuyere, air and nitrogen Delivery pipe and its switching valve, forced cooling chamber are granulated collector, exhaust outlet, discharge port, the chain conveyer under discharge port, with And the components such as magnetic separation screening setting.It is preferred that forced cooling chamber grows 15~25m, wide 10~15m, there are cooling air port in two sides, and bottom has Pellet collection device.For the granulation finished product that the present invention obtains, having powder grade, (granularity is in 0.5mm or less) and granulation grade Point of (granularity is in 0.5~5.0mm).It is high to obtain granulated product intensity, density is 3~6g/cm³.Granulated product finished product is then according to class Pack storage is stand-by.Wherein, powder grade product can making cement produce ingredient, also can return to steel-making use；Granulated product can do sand Profile material, sand-blast material and cement material etc., it is widely used.Iron charge is granulated product and returns to steel-making utilization.

It, can preferably following scheme to obtain better vanadium slag treatment effect in order to optimize wind quenching quality: in step a, Liquid steel slag temperature range in melt cinder tank is 1350~1600 DEG C；In step a, the liquid steel temperature range under liquid steel slag is 1550~1650 DEG C.By accurately controlling to temperature, the quality of wind quenching can be optimized, obtain more preferably product.Likewise, can With in preferred steps a, the rate of toppling over of the liquid steel slag in melt cinder tank is 10~70t/h.

It further include power-assisted tuyere in step a, tuyere and power-assisted tuyere are sent out strong to further strengthen wind quenching effect The pressure limit of wind is 0.4~0.6MPa.Wind quenching effect can be strengthened with tuyere together by including power-assisted tuyere, to realize more preferable Granulation effect.

In order to obtain more preferably cooling effect, in preferred steps a, the pressure cooling medium range in forced cooling chamber For 0.3~0.6MPa.

It is directed to the treatment effect containing this characteristic of molten steel in order to preferably optimize, preferably such scheme: in step a, When there is flue dust to occur, the nitrogen high wind pressure limit that tuyere is sent out is 1.0~1.5MPa.When there is flue dust to occur, mainly Molten steel granulation then needs targetedly to be adjusted high wind at this time, wherein the nitrogen high wind pressure limit that tuyere is sent out Guarantee final processing quality to flexibly cope with process demand when molten steel is granulated for 1.0~1.5MPa.Likewise, in order to Strengthen wind quenching effect, it is also preferable to include power-assisted tuyeres, when there is flue dust to occur, the nitrogen high wind pressure limit of power-assisted tuyere submitting For 1.0~1.5MPa.

In order to improve the efficiency of processing, in step a, after every tank contains the liquid steel slag wind quenching of molten steel, supplement immediately In next tank liquid vanadium slag to melt cinder tank and handled.In addition, slag processing can be carried out continuously, can also gap carry out, need to be with STEELMAKING PRODUCTION rhythm matches, and guarantees that STEELMAKING PRODUCTION smoothly efficiently carries out.In generally preferably step a, when every tank slag processing Between range between 10~60min.