CN102146545A - Method and composition for producing high-purity silicon iron - Google Patents
Method and composition for producing high-purity silicon iron Download PDFInfo
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- CN102146545A CN102146545A CN2010101061288A CN201010106128A CN102146545A CN 102146545 A CN102146545 A CN 102146545A CN 2010101061288 A CN2010101061288 A CN 2010101061288A CN 201010106128 A CN201010106128 A CN 201010106128A CN 102146545 A CN102146545 A CN 102146545A
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Abstract
The invention discloses new technology for producing high-purity silicon iron by using coke to substitute petroleum coke. The high-purity silicon iron for high-trade non-oriented silicon steel and oriented silicon steel is stably produced in large batch by using the coke as a main reducer. The technology comprises the following steps of: proportioning 190 to 210 kilograms of silica, 70 to 80 kilograms of coke, 30 to 20 kilograms of petroleum coke and 24 to 28 kilograms of steel scrap; blowing liquid silicon iron stock solution in a ladle table into oxygen rich compressed air with pressure of 0.2 to 0.6MPa, wherein the oxygen rich compressed air is connected with an air compressor through a tee joint in a bottled oxygen form, and an adjusting valve is separately set; and performing refining for 190 to 240 minutes. The obtained high-purity silicon iron totally can meet the requirements of producing the high-trade non-oriented silicon steel and the oriented silicon steel.
Description
Technical field
The present invention relates to the production method and the composition of metallurgical production high purity ferrosilicon.
Background technology
Along with the fast development of China's silicon steel technology, high grade non-oriented silicon steel and oriented silicon steel progressively become the main product in China silicon steel market, and it is also more and more higher to the requirement of producing necessary high purity ferrosilicon, and demand is also increasing.Traditional high purity ferrosilicon production method all adopts refinery coke as reductive agent, major cause is because the ash content of refinery coke is low, foreign matter content is low, can again it be carried out blowing refining and can obtain high purity ferrosilicon so that the foreign matter content in the stoste attitude ferrosilicon is very little.In patent ZL96120093.6 embodiment 1 and embodiment 2, all adopt refinery coke as reductive agent.Among the patent ZL01112586.1, not only use whole refinery cokes, but also bring impurity level in the stove into, reach lower level to control former liquid ferrosilicon foreign matter content, then by obtaining the high purity silicon iron alloy after the refining by the control self baking electrode as reductive agent.
But refinery coke is compared with coke as the reductive agent of ferrosilicon smelting, and its shortcoming is very obvious:
Therefore 1, refinery coke is reactive very poor, uses refinery coke to produce as reductive agent that ferrosilicon yields poorly, the power consumption height;
2, refinery coke is littler than resistance, and electrode is difficult to dark inserting, and causes the thorn fire serious, and the working of a furnace is difficult to grasp, and worker's labour intensity is big;
3, the easy greying of refinery coke can further reduce its reactivity, and graphited carbon is retained in the liquid ferrosilicon simultaneously, is difficult to be removed by prolonging refining time, causes product percent of pass to reduce, and quality product is difficult to guarantee.
4, refinery coke belongs to the byproduct of refining of petroleum, and market value is far above coke, and its price is big with the fluctuation of oil price simultaneously, and is very big to the cost impact of high purity ferrosilicon product.
But because the ash content of coke far above refinery coke, when it is used for the reductive agent of ferrosilicon smelting production, can be brought a certain amount of impurity into, must adopt certain processing method to be removed, just can obtain qualified high purity ferrosilicon.Usually the ash content of refinery coke is about about 0.3% to 0.5%, and the ash content of coke is 9% to 11%, and the former is the latter's 1/25th.
Summary of the invention
Above-mentioned deficiency at refinery coke and coke, we have invented a kind of coke that utilizes and have replaced refinery coke to produce the new technology of high purity ferrosilicon, with coke is main reductive agent, stablizes, produces in large quantity the high purity ferrosilicon that is used for high grade non-oriented silicon steel and oriented silicon steel.
A kind of composition of producing high purity ferrosilicon is made up of silica, coke, refinery coke and steel cuttings.Silica: coke: refinery coke: steel cuttings=190-210kg: 70-80kg: 30-20kg: the 24-28kg part by weight is prepared burden.
The granularity of silica is 20-80mm, and the granularity of described coke is 3-10mm, and the granularity of described refinery coke is 0-15mm.
A kind of production method of high purity ferrosilicon comprises the steps:
A prepares burden silica, coke, refinery coke, the steel cuttings mixing of certainweight;
B adds the hot stove in ore deposit with above-mentioned compound, smelts according to the ordinary method of ferrosilicon smelting, obtains liquid ferrosilicon stoste;
C is blown into the pressurized air that is rich in oxygen with platform bag bottom, opens the hot stove converter nose in ore deposit, and liquid ferrosilicon stoste flows in the platform bag naturally;
When d reaches about 200-400 millimeter when the liquid ferrosilicon stoste degree of depth in the platform bag, feed chlorine or oxygen from the Tai Bao top with carbon tube, and progressively add flammable loose matter;
After the e refining is finished the liquid ferrosilicon stoste in the platform bag poured in the ingot mould and cool off, promptly form the high purity ferrosilicon of bulk.
Silica: coke: refinery coke: steel cuttings=190-210kg: 70-80kg: 30-20kg: the 24-28kg part by weight is prepared burden.
The compressed-air actuated pressure that is blown into that is rich in oxygen is 0.2 MPa-0.6 MPa;
Threeway is connected with air compressor with bottle oxugen to be rich in the pressurized air of oxygen, and separately variable valve is set.
The time of blowing refining is 190-240 minute.
Owing to prolonged the external refining time, the combustion-supporting effect of oxygen, not only removed various impurity such as carbon in the liquid ferrosilicon stoste, calcium, aluminium, and the continuous liberated heat of oxygenizement keeps the calorific loss of blowing refining, can guarantee to reach the blowing refining time of processing requirement.
Flammable loose matter can be straw, husk, sawdust etc.
Present technique utilizes coke to replace refinery coke to produce the new technology of high purity ferrosilicon, can coke be main reductive agent, stablize, produce in large quantity the high purity ferrosilicon that is used for high grade non-oriented silicon steel and oriented silicon steel, its carbon, aluminium and titanium content all are lower than 0.010%, manganese content is lower than 0.040%, and the content of other elements has also reached client's purchase requirement.
By the market price of present refinery coke and coke, use this technology high purity silicon iron alloy per ton many units of 600--1200 that can save production cost, remarkable in economical benefits, China is coke production big country, substitutes refinery coke with coke and has strengthened the ability that enterprise controls cost.
Specific embodiments:
Embodiment 1: the equipment of employing is the hot stove in 9300KVA ore deposit, proportioning raw materials is a silica: coke: refinery coke: steel cuttings=195kg: 70kg: 30kg: 24kg, wherein the weight of coke and refinery coke is the net weight behind the deduction moisture, and the dioxide-containing silica of silica is 98.87%, and granularity is 20-80mm; The fixed carbon content of coke is 84.82%, and ash content is 8.85%, and granularity is 3-10mm; The fixed carbon content of refinery coke is 87.21%, and ash content is 0.32%, and granularity is 0-15mm.Above-mentioned compound is added the hot stove in ore deposit, smelt, obtain liquid ferrosilicon stoste according to the ordinary method of ferrosilicon smelting.The pressurized air that is rich in oxygen is dropped in platform bag bottom, open the hot stove converter nose in ore deposit, liquid ferrosilicon stoste flows in the platform bag naturally.The compressed-air actuated pressure that is blown into that is rich in oxygen is 0.2 MPa, along with the inflow of liquid ferrosilicon stoste is progressively transferred and is blown into pressure greatly, until reaching 0.6 MPa.Threeway is connected with air compressor with bottle oxugen to be rich in the pressurized air of oxygen, and separately variable valve is set.
When the liquid ferrosilicon stoste degree of depth in the platform bag reaches about 200-400 millimeter, feed chlorine or oxygen from the Tai Bao top with carbon tube, and progressively add straw or sawdust.Straw or sawdust burning back forms the plant ash tectum, and main effect is to prevent to be blown into splashing of liquid ferrosilicon stoste that gas causes.
The time of blowing refining is 210-240 minute, after refining is finished the liquid ferrosilicon stoste in the platform bag is poured in the ingot mould and cools off, and promptly forms the high purity ferrosilicon of bulk.Because the combustion-supporting effect of oxygen, not only removed various impurity such as carbon in the liquid ferrosilicon stoste, calcium, aluminium, and the continuous liberated heat of oxygenizement kept the calorific loss of blowing refining, can guarantee to reach the blowing refining time of processing requirement.
Obtaining the chemical ingredients of ferrosilicon after chemical examination according to the method described above is: silicon 76.2%, aluminium 0.007%, carbon 0.008%, titanium 0.009%, phosphorus 0.008%, manganese 0.014%, calcium 0.012%, sulphur 0.003% can satisfy the requirement that is used to produce high grade non-oriented silicon steel and oriented silicon steel fully.
Embodiment 2: the equipment of employing is the hot stove in 9300KVA ore deposit, proportioning raw materials is a silica: coke: refinery coke: steel cuttings=205kg: 80kg: 20kg: 25kg, wherein the weight of coke and refinery coke is the net weight behind the deduction moisture, and the dioxide-containing silica of silica is 98.50%, and granularity is 20-80mm; The fixed carbon content of coke is 84.24%, and ash content is 9.15%, and granularity is 3-10mm; The fixed carbon content of refinery coke is 86.51%, and ash content is 0.34%, and granularity is 0-15mm.
The pressurized air that is rich in oxygen is dropped in platform bag bottom, open the hot stove converter nose in ore deposit, liquid ferrosilicon stoste flows in the platform bag naturally.The compressed-air actuated pressure that is blown into that is rich in oxygen is 0.2 MPa, along with the inflow of liquid ferrosilicon stoste is progressively transferred and is blown into pressure greatly, until reaching 0.6 MPa.Threeway is connected with air compressor with bottle oxugen to be rich in the pressurized air of oxygen, and separately variable valve is set.
When the liquid ferrosilicon stoste degree of depth in the platform bag reaches about 200-400 millimeter, feed chlorine or oxygen from the Tai Bao top with carbon tube, and progressively add straw or sawdust.Straw or sawdust burning back forms the plant ash tectum, and main effect is to prevent to be blown into splashing of liquid ferrosilicon stoste that gas causes.
The time of blowing refining is 190-210 minute, after refining is finished the liquid ferrosilicon stoste in the platform bag is poured in the ingot mould and cools off, and promptly forms the high purity ferrosilicon of bulk.Because the combustion-supporting effect of oxygen, not only removed various impurity such as carbon in the liquid ferrosilicon stoste, calcium, aluminium, and the continuous liberated heat of oxygenizement kept the calorific loss of blowing refining, can guarantee to reach the blowing refining time of processing requirement.
The chemical ingredients of ferrosilicon after chemical examination that obtain according to above-mentioned smelting process is: silicon 76.1%, aluminium 0.008%, carbon 0.0086%, titanium 0.010%, phosphorus 0.008%, manganese 0.017%, calcium 0.013%, sulphur 0.004% can satisfy the requirement that is used to produce high grade non-oriented silicon steel and oriented silicon steel fully.
Claims (8)
1. a composition of producing high purity ferrosilicon is made up of silica, coke, refinery coke and steel cuttings.
2. composition as claimed in claim 1 is characterized by: described silica: coke: refinery coke: steel cuttings=190-210kg: 70-80kg: 30-20kg: the 24-28kg part by weight is prepared burden.
3. composition as claimed in claim 1 or 2 is characterized by: the granularity of described silica is 20-80mm, and the granularity of described coke is 3-10mm, and the granularity of described refinery coke is 0-15mm.
4. the production method of a high purity ferrosilicon comprises the steps:
A prepares burden silica, coke, refinery coke, the steel cuttings mixing of certainweight;
B adds the hot stove in ore deposit with above-mentioned compound, smelts according to the ordinary method of ferrosilicon smelting, obtains liquid ferrosilicon stoste;
C is blown into the pressurized air that is rich in oxygen with platform bag bottom, opens the hot stove converter nose in ore deposit, and liquid ferrosilicon stoste flows in the platform bag naturally;
When d reaches about 200-400 millimeter when the liquid ferrosilicon stoste degree of depth in the platform bag, feed chlorine or oxygen from the Tai Bao top with carbon tube, and progressively add flammable loose matter;
After the e refining is finished the liquid ferrosilicon stoste in the platform bag poured in the ingot mould and cool off, form high purity ferrosilicon.
5. as production method as described in the claim 4, it is characterized by: described silica: coke: refinery coke: steel cuttings=190-210kg: 70-80kg: 30-20kg: the 24-28kg part by weight is prepared burden.
6. as production method as described in the claim 4, it is characterized by: the described compressed-air actuated pressure that is blown into that is rich in oxygen is 0.2 MPa-0.6 MPa.
7. as production method as described in claim 4 or 5, it is characterized by: threeway is connected the described pressurized air that is rich in oxygen with air compressor with bottle oxugen, and separately variable valve is set.
8. as production method as described in the claim 4, it is characterized by: the time of described blowing refining is 190-240 minute.
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| CN2010101061288A CN102146545A (en) | 2010-02-05 | 2010-02-05 | Method and composition for producing high-purity silicon iron |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104726738A (en) * | 2015-04-08 | 2015-06-24 | 王先玉 | Crystalline silicon waste treatment method |
| CN105499526A (en) * | 2014-09-25 | 2016-04-20 | 鞍钢股份有限公司 | Method for reducing total oxygen content of aluminum killed steel continuous casting head blank |
| CN105679523A (en) * | 2016-03-28 | 2016-06-15 | 安徽迪维乐普非晶器材有限公司 | Manufacturing process of iron core |
| CN107012294A (en) * | 2017-03-22 | 2017-08-04 | 常州润达铁合金有限公司 | A kind of HIGH-PURITY SILICON iron powder and preparation method thereof |
| CN108660286A (en) * | 2018-06-19 | 2018-10-16 | 青海百通高纯材料开发有限公司 | A kind of smelting process of low-carbon ferrosilicon |
| CN108715973A (en) * | 2018-06-19 | 2018-10-30 | 青海百通高纯材料开发有限公司 | A kind of low-carbon ferrosilicon product and its smelting process |
-
2010
- 2010-02-05 CN CN2010101061288A patent/CN102146545A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499526A (en) * | 2014-09-25 | 2016-04-20 | 鞍钢股份有限公司 | Method for reducing total oxygen content of aluminum killed steel continuous casting head blank |
| CN104726738A (en) * | 2015-04-08 | 2015-06-24 | 王先玉 | Crystalline silicon waste treatment method |
| CN105679523A (en) * | 2016-03-28 | 2016-06-15 | 安徽迪维乐普非晶器材有限公司 | Manufacturing process of iron core |
| CN107012294A (en) * | 2017-03-22 | 2017-08-04 | 常州润达铁合金有限公司 | A kind of HIGH-PURITY SILICON iron powder and preparation method thereof |
| CN108660286A (en) * | 2018-06-19 | 2018-10-16 | 青海百通高纯材料开发有限公司 | A kind of smelting process of low-carbon ferrosilicon |
| CN108715973A (en) * | 2018-06-19 | 2018-10-30 | 青海百通高纯材料开发有限公司 | A kind of low-carbon ferrosilicon product and its smelting process |
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Application publication date: 20110810 |