CN104651606A - Method for simultaneously producing iron alloy and glass ceramics by utilizing lean iron ore resources - Google Patents
Method for simultaneously producing iron alloy and glass ceramics by utilizing lean iron ore resources Download PDFInfo
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- CN104651606A CN104651606A CN201510034158.5A CN201510034158A CN104651606A CN 104651606 A CN104651606 A CN 104651606A CN 201510034158 A CN201510034158 A CN 201510034158A CN 104651606 A CN104651606 A CN 104651606A
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- slag
- iron ore
- iron alloy
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Abstract
The invention discloses a method for directly producing iron alloy and glass ceramics by utilizing lean iron ore resources. The method comprises the following specific steps: step 1, selecting a proper fluxing agent according to the gangue composition, and regulating the slag composition into a range required by production of the glass ceramics; step 2, mixing the fluxing agent, carbon powder, an adhesive and ore powder according to a certain ratio, and pressing into blocks; step 3, feeding the pressed blocks obtained in the step 2 in a smelting furnace, heating to a reducing temperature, and preserving the temperature for a certain time; step 4, further heating the reduced product in the smelting furnace until the product is molten, heating and separating the iron alloy out; and step 5, quenching and forming the slag, performing crystallization treatment at a crystallization temperature, thereby obtaining the glass ceramics. According to the method, lean ore resources are utilized to the greatest degree, the energy consumption is reduced, the lean ore resources can be completely utilized, solid wastes are not produced, the process is simple, and the cost is low.
Description
Technical field
The present invention relates to a kind of production method utilizing poor iron ore simultaneously to produce iron alloy and devitrified glass.
Technical background
Mineral resources are a kind of important irreproducibility natural resourcess, are the important foundation starting material being widely used in national economy and national security every field.Along with socio-economic development, more and more outstanding to the contradiction that demand constantly increases and resource reserve constantly reduces of resource, also more and more urgent to the requirement of the efficiency utilization of existing resource.China is Mineral resources big country in the world, be also one of Mining Market and Consumption of Mineral Resources big country, but mineral products owning amount is very low per capita, and lean ore in domestic mineral products, difficult ore dressing, intergrowth mineral are many.According to statistics, in the explored mineral deposit of China, the useful bed of association accounts for 80%, and the economic worth of some large-scale synthesis mineral deposit association Useful Associated Elements is considerably beyond the value of principal element.But be scarcely out of swaddling-clothes to the exploitation of these associated minerals resources, high value added product ratio is lower, serious waste of resources.
The method of the poor iron ore of existing process has: beneficiation enrichment, and blast furnace process and non-blast furnace process are smelted.Wherein non-blast furnace process comprises again rotary kiln, shaft furnace, rotary hearth furnace direct-reduction process and smelting reduction process etc.These methods are all extract metal for main purpose substantially, produce a large amount of slags, need to carry out open pit mining.The large quantity of slag caused because gangue content content in lean ore is high, makes METAL EXTRACTION cost high, becomes the bottleneck that restriction lean ore utilizes technology.
Gangue in lean ore has accounted for more than the 60-70% of mineral total mass mutually, and exists with the form of complex oxide, is the natural matter preparing oxide glass.Pyrogenic process extraction metal must react at a certain temperature and just can carry out, and the efficiency that the rising along with temperature is reacted raises gradually.In the process of high temperature reduction, gangue is heated, and continues raised temperature, achieves being separated and the process of glass melting of alloy and slag, saves the energy.
The existing blast furnace slag that utilizes produces the method for devitrified glass, be generally the slag that produces of normal iron-smelting process after overcooling, according to slag chemistry composition, add nucleating agent, then devitrified glass is prepared in melting.These techniques are all carry out composition regulation and control on blast furnace slag basis, and slag composition is generally alkalescence.
The present invention directly regulates devitrified glass composition according to the gangue content of poor iron ore, selected reductive agent does not bring mineralogical composition into substantially, pass through heat reduction, melting is separated, direct production devitrified glass, close to the gangue content of 70% in the poor iron ore of efficiency utilization, extract iron alloy can as the raw material producing special steel simultaneously, do not produce solid waste, achieve the utilization completely of poor iron ore.
Summary of the invention
The object of this invention is to provide a kind of method utilizing lean ore resource simultaneously to produce iron alloy and devitrified glass, the utilization completely of lean ore resource can be realized, do not produce solid waste.
The object of the invention is to be achieved through the following technical solutions.
A kind of method utilizing poor iron ore deposit simultaneously to produce iron alloy and devitrified glass of the present invention, is characterized in that having following technological process and step:
A) suitable poor iron ore is selected; Main component is wt.%:TFe 8-12%, Ni 0.8-1.5%, SiO
235-50%, MgO 18-35%, crystal water 8-12%;
B) by poor iron mineral powder agglomeration; Powdered iron ore adds the flux of 5-20%, the carbon dust of 15-25%, 1-5% organic binder bond briquetting;
C) agglomerate obtained in step b is added smelting furnace, reductase 12-6 hours under 900-1250 DEG C of condition, then smelting furnace is warming up to 1450-1600 DEG C of insulation 2-6 hour;
D) separation of iron alloy and slag;
E) isolated for steps d melting slag is quenched to 500-800 DEG C shaping, insulation annealing at 800-1200 DEG C, annealing time 6-48 hour, obtains devitrified glass.
Described flux is CaO; According to gangue content in poor iron ore, additive is selected to regulate slag main component to meet: SiO
245-60%, MgO 20-35%, CaO 5-20%.
Described organic binder bond is polyvinyl alcohol, and described carbon dust and organic binder bond mineral content are less than 5%.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the inventive method.
Embodiment
Below in conjunction with embodiment, the present invention is further described.
embodiment 1
One-tenth component selections flux according to lean ore A is CaO, and addition is 15% of lean ore weight, and carbon dust addition is 20%, after flux and breeze Homogeneous phase mixing, adds the polyvinyl alcohol water solution briquetting of 5%.Briquetting is put into reactor, and reduction temperature 900 DEG C reduction 6 hours, continues to be warming up to 1500 DEG C, is incubated 3 hours, is separated slag iron, obtains iron alloy and the slag (SiO of nickeliferous 16%
247%, MgO 33%, CaO, 17%, Al
2o
31.1%, Cr
2o
30.9%, MnO 0.2%).Slag is directly poured in punching block be quenched to 600 DEG C shaping after, put into annealing furnace and carry out Crystallizing treatment, treatment temp is 1000 DEG C, and the time is 12 hours, obtains crystallized glass article.
embodiment 2
In embodiment 2, additive selects SiO
2+ CaO, ratio is 1:1, and addition is 20% of lean ore weight, and other conditions are constant, obtains iron alloy and the slag (SiO of nickeliferous 16%
255%, MgO 32%, CaO, 10%, Al
2o
31.0%, Cr
2o
30.9%, MnO 0.2%).Slag is directly poured in punching block be quenched to 800 DEG C shaping, put into annealing furnace and be incubated 24 hours at 1000 DEG C, obtain devitrified glass.
embodiment 3
One-tenth component selections flux according to lean ore C is CaO, and addition is 15% of lean ore weight, and carbon dust addition is 20%, after flux and breeze Homogeneous phase mixing, adds the polyvinyl alcohol water solution briquetting of 2%.Briquetting is put into reactor, and reduction temperature 1000 DEG C reduction 6 hours, continues to be warming up to 1500 DEG C, is incubated 3 hours, is separated slag iron, obtains iron alloy and the slag (SiO of nickeliferous 12%
256%, MgO 22%, CaO, 17%, Al
2o
33.4%, Cr
2o
31.0%, MnO 0.3%).Slag is directly poured in punching block be quenched to 800 DEG C shaping after, put into annealing furnace and carry out Crystallizing treatment, treatment temp is 1100 DEG C, and the time is 12 hours, obtains crystallized glass article.
embodiment 4
One-tenth component selections flux according to lean ore A is CaO, and addition is 15% of lean ore weight, after the carbon dust Homogeneous phase mixing of flux and breeze and breeze weight 20%, adds the polyvinyl alcohol water solution briquetting of 5%.Briquetting is put into reactor, is heated to 1350 DEG C, reduce 3 hours, continue to be warmed up to 1500 DEG C, be separated slag iron, obtain iron alloy and the slag (SiO of nickeliferous 16%
247%, MgO 33%, CaO, 17%, Al
2o
31.1%, Cr
2o
30.9%, MnO 0.2%).Slag is directly poured in punching block be quenched to 800 DEG C shaping after, put into annealing furnace and carry out Crystallizing treatment, treatment temp is 900 DEG C, and the time is 48 hours, obtains crystallized glass article.
Claims (3)
1. utilize poor iron ore deposit to produce a method for iron alloy and devitrified glass simultaneously, it is characterized in that there is following technological process and step:
A) suitable poor iron ore is selected; Main component is wt.%:TFe 8-12%, Ni 0.8-1.5%, SiO
235-50%, MgO 18-35%, crystal water 8-12%;
B) by poor iron mineral powder agglomeration; Powdered iron ore adds the flux of 5-20%, the carbon dust of 15-25%, 1-5% organic binder bond briquetting;
C) agglomerate obtained in step b is added smelting furnace, reductase 12-6 hours under 900-1250 DEG C of condition, then smelting furnace is warming up to 1450-1600 DEG C of insulation 2-6 hour;
D) separation of iron alloy and slag;
E) isolated for steps d melting slag is quenched to 500-800 DEG C shaping, insulation annealing at 800-1200 DEG C, annealing time 6-48 hour, obtains devitrified glass.
2. a kind of method utilizing poor iron ore deposit simultaneously to produce iron alloy and devitrified glass according to claim 1, is characterized in that: described flux is CaO; According to gangue content in poor iron ore, additive is selected to regulate slag main component to meet: SiO
2, 45-60%, MgO 20-35%, CaO 5-20%.
3. a kind of method utilizing poor iron ore deposit simultaneously to produce iron alloy and devitrified glass according to claim 1, is characterized in that: described organic binder bond is polyvinyl alcohol; Described carbon dust and organic binder bond mineral content are less than 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510034158.5A CN104651606A (en) | 2015-01-23 | 2015-01-23 | Method for simultaneously producing iron alloy and glass ceramics by utilizing lean iron ore resources |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510034158.5A CN104651606A (en) | 2015-01-23 | 2015-01-23 | Method for simultaneously producing iron alloy and glass ceramics by utilizing lean iron ore resources |
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| CN201510034158.5A Pending CN104651606A (en) | 2015-01-23 | 2015-01-23 | Method for simultaneously producing iron alloy and glass ceramics by utilizing lean iron ore resources |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107338343A (en) * | 2016-04-29 | 2017-11-10 | 株式会社Posco | Flux and use its casting method |
| CN112209638A (en) * | 2020-09-30 | 2021-01-12 | 北京科技大学 | Method for preparing artificial stone by using iron-containing slag obtained by pyrometallurgy |
-
2015
- 2015-01-23 CN CN201510034158.5A patent/CN104651606A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107338343A (en) * | 2016-04-29 | 2017-11-10 | 株式会社Posco | Flux and use its casting method |
| CN107338343B (en) * | 2016-04-29 | 2020-05-19 | 株式会社Posco | Flux and casting method using the same |
| CN112209638A (en) * | 2020-09-30 | 2021-01-12 | 北京科技大学 | Method for preparing artificial stone by using iron-containing slag obtained by pyrometallurgy |
| CN112209638B (en) * | 2020-09-30 | 2021-09-14 | 北京科技大学 | Method for preparing artificial stone by using iron-containing slag obtained by pyrometallurgy |
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Application publication date: 20150527 |
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