CN108165697A - A kind of pneumatic steelmaking exothermic mixture and its production method - Google Patents
A kind of pneumatic steelmaking exothermic mixture and its production method Download PDFInfo
- Publication number
- CN108165697A CN108165697A CN201711416966.3A CN201711416966A CN108165697A CN 108165697 A CN108165697 A CN 108165697A CN 201711416966 A CN201711416966 A CN 201711416966A CN 108165697 A CN108165697 A CN 108165697A
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- CN
- China
- Prior art keywords
- powder
- exothermic mixture
- pneumatic steelmaking
- weight percent
- iron oxide
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/16—Materials undergoing chemical reactions when used
- C09K5/18—Non-reversible chemical reactions
Abstract
The invention discloses a kind of pneumatic steelmaking exothermic mixtures, including industrial silica fume, AD powder and raw iron oxide material, weight percent shared by the industrial silica fume is 40%~60%, it is 20%~40% that the AD powder, which accounts for weight percent, weight percent shared by the raw iron oxide material is 10%~30%, remaining is binding agent, additive；Its primary raw material is the great waste of the effect on environment generated in industrial production；Above-mentioned raw materials are after reasonably proportioning pressure ball, and not only its heating effect is better than existing similar exothermic mixture, and have found a kind of method of waste material comprehensive utilization.
Description
Technical field
The present invention relates to metallurgical technology fields, and in particular to a kind of pneumatic steelmaking exothermic mixture and its production method utilize
Industrial silica fume and raw iron oxide material compacting balling-up, provide heat in convertor steelmaking process.
Background technology
With the development of China's steel and the growing tension of International Iron Ore stone resource, steel scrap makes in steelmaking process
Dosage is continuously increased.But in converter and electric furnace smelting, scrap ratio increases, and initial smelting period furnace heat must can be caused insufficient
Phenomenon generates, and occurs that slagging is slow, and the poor situation of first slag mobility is made troubles to production.To solve this problem, steel mill one
As can according to smelt demand, smelt initial stage, can different exothermic mixtures is added in into stove, this kind of exothermic mixture is generally high-grade
Ferrosilicon and silicon-carbon synthesis ball etc..This kind of exothermic mixture typically contains a certain amount of ferrosilicon, and the production of ferrosilicon is not only with high costs, and
And serious carrying capacity of environment can be brought.
The sustainable energy that solar energy power generating is considered as most clean environment firendly by industry utilizes form, is obtained in recent years global
To fast development.In recent years, China emerges as solar-energy photo-voltaic cell big producer rapidly.2000, Chinese photovoltaic cell production
Amount is only 3 megawatts, will have reached 1088 megawatts to the end of the year in 2007, has ranked first in the world.When preparing solar cell, needing will be high-purity
Silicon casts polycrystal silicon ingot, is then cut into silicon chip.Used in monocrystalline silicon or solar cell either used in semi-conductor industry
Polysilicon, be required for high-purity crystalline silicon cutting into silicon chip.In cutting process, a large amount of industrial silica fume can be generated, it should
The content of metallic silicon is up to more than 70% in silica flour, but because the industrial silica fume has the characteristics that granularity is small, activity is high, at present not yet
There is outstanding processing method, have resulted in serious problem of environmental pollution, the synthetical recovery of industrial silica fume will be carried out both at home and abroad
A large amount of research work, but without working out the recovery technology with huge economic benefit and environmental benefit.Solve work
The problem of industry silica flour, wants Developing Circulation Economy, green economy and environmental protection industry, farthest improves the utilization of waste material
Efficiency.
AD powder is a kind of slag charge generated during aluminium metallurgy, mainly by material compositions such as metallic aluminium, aluminium oxide, sodium oxide molybdenas,
Its metal aluminum content may be up to more than 30%.According to theoretical calculation, one ton of metallic aluminium is often produced, about generates 240~300 kilograms of AD
Powder.AD powder is mainly used for the links such as deoxidation, the desulfurization in steel smelting procedure at present, but because its impurity content is more, it is impossible to should
It is pending in high-quality steel, causing to have quite a few AD powder directly to be buried or simply accumulating, cause certain ring
Border pollution problem.
Metallic silicon in above two raw material and metallic aluminium are outstanding heat generating agent for steel making, oxidation equation formula
For：
Si+O=SiO2+ heats
Al+O=Al2O3+ heats
By aforesaid equation it is found that metallic silicon and metallic aluminium can release heat, therefore industrial silica fume and AD in oxidation
Powder is heat source substance in this programme, and on the one hand the oxygen in raw iron oxide material can then improve the proportion of exothermic mixture, avoids sending out
Thermit powder is taken away in use by dedusting, on the other hand provides oxygen source, promotes the heating effect of exothermic mixture.
Invention content
According to the deficiencies of the prior art described above, It is an object of the present invention to provide a kind of converter exothermic mixture, converter refinings
Steel exothermic mixture is made by pressure ball after industrial silica fume and AD powder and raw iron oxide material mixing, and the ingredient of the exothermic mixture ensure that its hair
Thermal effect, and its is raw materials used, then with apparent environment protecting.
The realization of the object of the invention by following technical scheme by being completed below：
A kind of pneumatic steelmaking exothermic mixture, which is characterized in that described including industrial silica fume, AD powder and raw iron oxide material
Weight percent shared by industrial silica fume is 40%~60%, and it is 20%~40% that the AD powder, which accounts for weight percent, described
Weight percent shared by raw iron oxide material is 10%~30%, remaining is binding agent, additive.
Further, the industrial silica fume granularity is not more than 3mm, and the AD Powder Particle Sizes are not more than 3mm, the oxidation
Iron material granularity is not more than 5mm.
Further, metal silicone content is 70%~95% in the industrial silica fume.
Further, metal aluminum content is 5%~35% in the AD powder.
Further, FeO contents are 80%~95% in the raw iron oxide material.
Further, the additive accounts for the 0%- of the weight percent of the pneumatic steelmaking exothermic mixture total weight
15%, the additive is silicon carbide, metallic aluminium powder, ferrosilicon powder, one kind in graphite or at least two combination.
Further, the binding agent account for the weight percent of the pneumatic steelmaking exothermic mixture total weight for 0%~
10%, the binding agent is waterglass, cement, starch, piece alkali, 801 glue, yellow starch gum, one kind in CMC or at least two
Combination.
Further, the production method of pneumatic steelmaking exothermic mixture is stated, which is characterized in that by the industrial silica fume, described
AD powder mixed with the iron oxide, additive and binding agent are added in after being sufficiently stirred mixing, using high pressure roller pressure ball
Machine is pressed into orbicule.
It is an advantage of the current invention that pneumatic steelmaking primary raw material used in exothermic mixture is to be generated in industrial production to ring
Border influences great waste.Wherein the waste of recoverable, AD powder are not industrial silica fume caused by photovoltaic industry
Generated waste in metallic aluminium production process, raw iron oxide material are the waste material generated in steel smelting procedure.Industrial silica fume
In metallic silicon, the metallic aluminium in AD powder be golf calorific value substance, and raw iron oxide material can not only provide metallic silicon and metal
The oxygen source needed during alumina can also increase the proportion of product, avoid what exothermic mixture was directly taken away when in use by dedusting
It may.For above-mentioned raw materials after reasonably proportioning pressure ball, not only its heating effect is better than existing similar exothermic mixture, and has found
A kind of method of waste material comprehensive utilization.
Description of the drawings
Fig. 1 is the flow chart of the production method of the present invention；
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Present pre-ferred embodiments are given below, with the technical solution that the present invention will be described in detail.
Embodiment 1：
By the pneumatic steelmaking exothermic mixture, including industrial silica fume, AD powder, raw iron oxide material, binding agent, additive,
Its weight percent is：Industrial silica fume 40%；AD powder 37%；Iron oxide 20%；CMC binding agents 1%, silicon carbide 1%, metallic aluminium
Powder 1%.
Embodiment 2：
By the pneumatic steelmaking exothermic mixture, including industrial silica fume, AD powder, raw iron oxide material, binding agent, additive,
Its weight percent is：Industrial silica fume 45%；AD powder 32%；Iron oxide 20%；CMC binding agents 3%.
Embodiment 3：
The pneumatic steelmaking exothermic mixture, including industrial silica fume, AD powder, raw iron oxide material, binding agent, additive,
Weight percent is：Industrial silica fume 50%；AD powder 27%；Iron oxide 20%；CMC binding agents 0.5%, waterglass 0.2%, cement
0.2%th, starch 0.1%, piece alkali 0.1%, 801 glue 0.1%, yellow starch gum 0.1%, silicon carbide 0.5%, metallic aluminium powder 0.5%,
Ferrosilicon powder 0.5%, graphite 0.2%.
Embodiment 4：
By the pneumatic steelmaking exothermic mixture, including industrial silica fume, AD powder, raw iron oxide material, binding agent, additive,
Its weight percent is：Industrial silica fume 55%；AD powder 22%；Iron oxide 20%；CMC binding agents 1%, cement 1%, silicon carbide
0.5%th, metallic aluminium powder 0.5%.
After raw material in above-described embodiment are weighed, after being sufficiently stirred mixing, using high pressure para-roller ball pressing machine pressure
Glomeration body.
By exothermic mixture made from above-described embodiment, certain 300 tons of converter is tested at home, every group of embodiment field test
10 stoves, while the carbonic reheating agent used at present with it compares, effect is as shown in table 1 below：
Exothermic mixture using effect contrast table obtained in the case of the different embodiments of table 1
Note：Above-mentioned test situation is obtained data under the conditions of identical molten iron.
As seen from the above embodiment, using the exothermic mixture prepared by the method for the present invention, compared with former carbonic reheating agent, adding
Enter amount it is identical in the case of, temperature rise effect is substantially better than primary thermit powder.
It is obvious to a person skilled in the art that the present invention is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (8)
1. a kind of pneumatic steelmaking exothermic mixture, which is characterized in that including industrial silica fume, AD powder and raw iron oxide material, the work
Weight percent shared by industry silica flour is 40%~60%, and it is 20%~40% that the AD powder, which accounts for weight percent, the oxygen
It is 10%~30% to change weight percent shared by iron material, remaining is binding agent, additive.
2. a kind of pneumatic steelmaking exothermic mixture according to claim 1, which is characterized in that the industrial silica fume granularity is not
More than 3mm, the AD Powder Particle Sizes are not more than 3mm, and the raw iron oxide material granularity is not more than 5mm.
A kind of 3. pneumatic steelmaking exothermic mixture according to claim 1, which is characterized in that metallic silicon in the industrial silica fume
Content is 70%~95%.
A kind of 4. pneumatic steelmaking exothermic mixture according to claim 1, which is characterized in that metal aluminum content in the AD powder
It is 5%~35%.
A kind of 5. pneumatic steelmaking exothermic mixture according to claim 1, which is characterized in that FeO in the raw iron oxide material
Content is 80%~95%.
6. a kind of pneumatic steelmaking exothermic mixture according to claim 1, which is characterized in that the additive accounts for described turn
The 0%-15% of the weight percent of stove heat generating agent for steel making total weight, the additive is silicon carbide, metallic aluminium powder, ferrosilicon
One kind or at least two combination in powder, graphite.
7. a kind of pneumatic steelmaking exothermic mixture according to claim 1, which is characterized in that the binding agent accounts for described turn
The weight percent of stove heat generating agent for steel making total weight is 0%~10%, and the binding agent is waterglass, cement, starch, piece
Alkali, 801 glue, yellow starch gum, one kind in CMC or at least two combination.
8. the production method of a kind of pneumatic steelmaking exothermic mixture according to claim 1, which is characterized in that by the work
Industry silica flour, the AD powder are mixed with the iron oxide, additive and binding agent are added in after being sufficiently stirred mixing, using height
Pressure two pairs of rollers ball press is pressed into orbicule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711416966.3A CN108165697A (en) | 2017-12-25 | 2017-12-25 | A kind of pneumatic steelmaking exothermic mixture and its production method |
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| CN201711416966.3A CN108165697A (en) | 2017-12-25 | 2017-12-25 | A kind of pneumatic steelmaking exothermic mixture and its production method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109504853A (en) * | 2018-12-29 | 2019-03-22 | 上海盛宝冶金科技有限公司 | A kind of pneumatic steelmaking exothermic mixture and preparation method thereof |
| CN109825671A (en) * | 2018-06-28 | 2019-05-31 | 蒋维柒 | A kind of preparation method and its usage of industrial silica fume pelletizing |
| CN111331092A (en) * | 2020-04-09 | 2020-06-26 | 安徽工业大学 | Preparation method of metallurgical exothermic agent for continuous casting tailing blank |
| CN111635979A (en) * | 2020-06-03 | 2020-09-08 | 马鞍山市兴达冶金新材料有限公司 | Low-cost heat generating agent for converter and production method thereof |
| CN114214480A (en) * | 2021-12-23 | 2022-03-22 | 上海盛宝冶金科技有限公司 | Environment-friendly steelmaking heating slag melting agent |
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| CN102433444A (en) * | 2011-12-31 | 2012-05-02 | 上海盛宝钢铁冶金炉料有限公司 | Stainless steel dusting powder reduced pellet containing photovoltaic material and production method thereof |
| CN102534091A (en) * | 2011-12-31 | 2012-07-04 | 上海盛宝冶金科技有限公司 | Heat generating agent for steel making and production method thereof |
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| CN102433444A (en) * | 2011-12-31 | 2012-05-02 | 上海盛宝钢铁冶金炉料有限公司 | Stainless steel dusting powder reduced pellet containing photovoltaic material and production method thereof |
| CN102534091A (en) * | 2011-12-31 | 2012-07-04 | 上海盛宝冶金科技有限公司 | Heat generating agent for steel making and production method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109825671A (en) * | 2018-06-28 | 2019-05-31 | 蒋维柒 | A kind of preparation method and its usage of industrial silica fume pelletizing |
| CN109504853A (en) * | 2018-12-29 | 2019-03-22 | 上海盛宝冶金科技有限公司 | A kind of pneumatic steelmaking exothermic mixture and preparation method thereof |
| CN111331092A (en) * | 2020-04-09 | 2020-06-26 | 安徽工业大学 | Preparation method of metallurgical exothermic agent for continuous casting tailing blank |
| CN111331092B (en) * | 2020-04-09 | 2022-08-02 | 安徽工业大学 | Preparation method of metallurgical exothermic agent for continuous casting tailing blank |
| CN111635979A (en) * | 2020-06-03 | 2020-09-08 | 马鞍山市兴达冶金新材料有限公司 | Low-cost heat generating agent for converter and production method thereof |
| CN114214480A (en) * | 2021-12-23 | 2022-03-22 | 上海盛宝冶金科技有限公司 | Environment-friendly steelmaking heating slag melting agent |
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Application publication date: 20180615 |