CN1045110C - Calcium-silicon compound deoxident and producing technology thereof - Google Patents
Calcium-silicon compound deoxident and producing technology thereof Download PDFInfo
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- CN1045110C CN1045110C CN97113363A CN97113363A CN1045110C CN 1045110 C CN1045110 C CN 1045110C CN 97113363 A CN97113363 A CN 97113363A CN 97113363 A CN97113363 A CN 97113363A CN 1045110 C CN1045110 C CN 1045110C
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- furnace
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- silicon
- quartz sand
- smelting
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- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 title abstract description 16
- 238000005516 engineering process Methods 0.000 title abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000003723 Smelting Methods 0.000 claims abstract description 18
- 230000006698 induction Effects 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 4
- 239000006004 Quartz sand Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 9
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 9
- 239000000292 calcium oxide Substances 0.000 claims description 9
- 239000004571 lime Substances 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 8
- 239000000571 coke Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 239000011575 calcium Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 229910008455 Si—Ca Inorganic materials 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 229910000882 Ca alloy Inorganic materials 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 229910000831 Steel Inorganic materials 0.000 abstract description 8
- 239000010959 steel Substances 0.000 abstract description 8
- 229910052681 coesite Inorganic materials 0.000 abstract description 4
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 4
- 229910052682 stishovite Inorganic materials 0.000 abstract description 4
- 229910052905 tridymite Inorganic materials 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000024121 nodulation Effects 0.000 abstract description 2
- 108091006629 SLC13A2 Proteins 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910014813 CaC2 Inorganic materials 0.000 description 1
- 229910004709 CaSi Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000007630 basic procedure Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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Abstract
The present invention relates to a silicon-calcium alloy product and a production method thereof. The silicon-calcium alloy product has the raw materials in weight percentage: 40 to 52% of SiO2, 30 to 45% of CaO, 8 to12% of C and 2 to 4% of NaC1. The raw materials are uniformly mixed and stirred and are put in a special induction furnace to be smelted for one and a half hours; the furnace temperature is 1800 DEG C. The furnace materials are stirred according to furnace conditions during smelting; the furnace materials can be discharged to cast an ingot mould after the furnace materials are dissolved and the temperature is kept for a period of time; and the ingot mould is crushed into the product after being cooled. Compared with the existing silicon-calcium alloy technology, the production technology has the advantages of less investment, low cost and less energy consumption. The silicon-calcium alloy product as a deoxidizing agent is used for smelting steel, makes molten steel flowability good and nodulation accidents fewer, and decreases pollution.
Description
The invention belongs to the field of smelting, and particularly relates to a calcium-silicon alloy product and a production method thereof.
The silicon-calcium alloy as deoxidant for smelting steel is prepared with Ca (24-31%) and Si (55-65%) as main elements and through reducing silicon dioxide and calcium oxide in ore smelting furnace with carbonaceous reductant, and the production process includes mixing, layered feeding, silicothermic process, etc. the silicon-calcium alloy is produced with silica, lime, coke, charcoal and soft coal as raw materials. Taking a layered feeding method as an example, the basic procedures are as follows: 1. after the material is discharged out of the furnace, the material collapsing part is smashed, new materials are added, the smashing furnace is ventilated, and the temperature is raised (about 1 to 2 hours) after the material is braised; 2. mixing lime and coke uniformly, adding the mixture to the periphery of an electrode, and stewing; 3. adding new material after lime is melted, adding silica after stewing for half anhour to destroy CaC2So as to produce the silicon-calcium alloy and discharge the silicon-calcium alloy. Because the silicon-calcium alloy is produced in the submerged arc furnace, the investment is large, the production process is complex, and poor treatment in any link can cause low Ca content, large slag amount and more accumulated nodules of the alloy; the production of Si-Ca alloy by ore furnace has short furnace life, high power consumption and increased cost.
The invention aims to provide a novel silicon-calcium deoxidizer and a production process aiming at certain defects of the existing silicon-calcium alloy.
The technical scheme for realizing the purpose of the invention is as follows: the composition of the product (weight percent) is as follows: 20-30% of silicon, 20-40% of calcium, 17-19% of carbon (1%, 21-23% of calcium oxide and 17-19% of silicon dioxide), and the balance of conventional inevitable impurities, wherein the harmful impurities of aluminum, phosphorus and sulfur are not more than 2.6%.
The production process of the deoxidizer comprises the following steps: wherein the deoxidizer is prepared from quartz sand (SiO component)2) Lime (ingredient CaO)Coke (C) and salt (NaCl), wherein the raw materials comprise the following components in percentage by weight: 40-52% of quartz sand, 30-45% of lime, 8-12% of coke and 2-4% of salt. The raw materials in the proportion are uniformly mixed and put into an induction furnace for smelting. The induction furnace comprises a graphite crucible, a coil, a quartz sand knotting layer and a furnace body, wherein the graphite crucible is fixed on the furnace body through the quartz sand knotting layer, and the coil is positioned between the furnace body and the quartz sand knotting layer and keeps a gap with the crucible. The smelting time of the raw materials in a furnace bodyis 2.5 hours, the furnace temperature is 1800 ℃, wherein the first hour comprises the heating and melting time of the raw materials, when the furnace temperature reaches 1800 ℃, the later half an hour is the full reaction and heat preservation time of furnace materials, the furnace materials are stirred according to the furnace conditions in the smelting process, the furnace materials can be taken out and poured after the reaction is finished, and the furnace materials are demolded and crushed into products after cooling.
The main principle of the process is as follows: SiO 22CaO and C react under the high-temperature condition (1800 ℃) of the induction furnace, and the chemical reaction equation is as follows: and NaCl is used as a catalyst, so that the chemical reaction temperature can be reduced, and the reaction speed is increased. The materials are fully mixed by stirring,complete CaO and SiO2Reduction by C to CaSi.
The product contains Si 20-30%, Ca 20-40%, C less than 1%, CaO 21-23%, and SiO2The content of the aluminum alloy is 17-19%, harmful impurities of Al, P and S are not more than 2.6%, and the balance is conventional inevitable impurities.
The invention has the following advantages:
1. compared with the existing silicon-calcium alloy process, the invention has the advantages of small investment, low cost and low energy consumption;
2. when the product is used as a steelmaking deoxidizer, the molten steel has good fluidity, the nodulation accidents are less, and the pollution is greatly reduced;
3. compared with the silicon-calcium alloy produced by the submerged arc furnace, the product produced by the invention has stable quality grade and is not easy to have the pulverization phenomenon.
The examples of the invention are as follows:
quartz sand, lime, a reducing agent, carbon and a catalyst are mixed and stirred uniformly according to the weight percentage of 40-52 percent of stone charcoal sand, 30-45 percent of lime, 8-12 percent of coke and 2-4 percent of salt, the mixture is put into a special induction furnace for smelting, the smelting is carried out for 1 hour at the furnace temperature of 1800 ℃, a second batch of materials is added after the furnace materials are melted, the smelting is continued, the furnace materials are continuously stirred, the smelting is carried out for 1 hour, the stirring is stopped after the second batch of furnace materials are also melted, the furnace is taken out for smelting for half an hour at the temperature of 1800 ℃, an ingot mold is poured, and the ingot mold is crushed into a product after being cooled. The induction furnace used for smelting consists of a graphite crucible, a coil, a quartz sand bonding layer and a furnace body. The crucible is fixed on the furnace body through the quartz sand knotting layer, and the coil is positioned between the furnace body and the quartz sand knotting layer and keeps a gap with the crucible. The crucible made of high-power graphite electrode is equivalent to the induction heating body of the smelting furnace, the furnace charge is not magnetic, the furnace temperature is raised under the action of the induction coil, and the pure Si content of the product smelted in the special induction furnace is lower. The smelted finished product comprises the following components in percentage by weight: 20-30% of silicon, 20-40% of calcium, less than 1% of carbon, 21-23% of CaO, SiO217-19%, harmful impurities of aluminium, phosphorus and sulfur are not more than 2.6%, and the rest is conventional inevitable impurities. The components without deoxidation capability in the deoxidizer product can enter the steel slag in the deoxidation process, cannot cause pollution to molten steel, increases the fluidity of the molten steel, and has stable molten steel quality.
Claims (2)
1. The composite Si-Ca deoxidant consists of the following components in weight percentage: 20-30% of silicon, 20-40% of calcium, less than 1% of carbon, 21-23% of calcium oxide, 17-19% of silicon dioxide, less than 2.6% of harmful impurities of aluminum, phosphorus and sulfur, and the balance of conventional inevitable impurities.
2. The process for producing a Si-Ca complex deoxidizer of claim 1, wherein the deoxidizer is produced by using quartz sand (SiO component) as a raw material2) Lime (ingredient CaO), coke (C) and salt (NaCl), wherein the raw materials comprise the following components in percentage by weight: 40-52% of quartz sand, 30-45% of lime, 8-12% of coke and 2-4% of salt, and mixing the above materials according to the proportionUniformly mixing the materials, and putting the mixture into an induction furnace for smelting; the induction furnace comprises a graphite crucible, a coil, a quartz sand knotting layer and a furnace body, wherein the graphite crucible is fixed on the furnace body through the quartz sand knotting layer, and the coil is positioned between the furnace body and the quartz sand knotting layer and keeps a gap with the crucible; the smelting time of the raw materials in a furnace body is 2.5 hours, the furnace temperature condition is 1800 ℃, wherein the first hour comprises the heating and melting time of the raw materials, when the furnace temperature reaches 1800 ℃, the next half hour is the full reaction and heat preservation time of the furnace materials, the furnace materials are stirred according to the furnace conditions during smelting, the furnace materials can be taken out and poured after the reaction is finished, and the furnace materials are demolded and crushed into products after cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97113363A CN1045110C (en) | 1997-07-29 | 1997-07-29 | Calcium-silicon compound deoxident and producing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97113363A CN1045110C (en) | 1997-07-29 | 1997-07-29 | Calcium-silicon compound deoxident and producing technology thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1196395A CN1196395A (en) | 1998-10-21 |
| CN1045110C true CN1045110C (en) | 1999-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97113363A Expired - Fee Related CN1045110C (en) | 1997-07-29 | 1997-07-29 | Calcium-silicon compound deoxident and producing technology thereof |
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| Country | Link |
|---|---|
| CN (1) | CN1045110C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114015888A (en) * | 2021-11-04 | 2022-02-08 | 金川集团股份有限公司 | Intermediate frequency furnace nickel smelting composite diffusion deoxidizer and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86108553A (en) * | 1986-12-17 | 1987-07-22 | 江西坩埚厂 | Induction furnace made of graphite component |
| CN87102657A (en) * | 1987-04-13 | 1988-12-07 | 冶金工业部钢铁研究总院 | Industrial frequency resistance induction furnace |
| CN1127788A (en) * | 1995-11-07 | 1996-07-31 | 四川理县理成铁合金厂 | High calcium-silicon iron |
-
1997
- 1997-07-29 CN CN97113363A patent/CN1045110C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86108553A (en) * | 1986-12-17 | 1987-07-22 | 江西坩埚厂 | Induction furnace made of graphite component |
| CN87102657A (en) * | 1987-04-13 | 1988-12-07 | 冶金工业部钢铁研究总院 | Industrial frequency resistance induction furnace |
| CN1127788A (en) * | 1995-11-07 | 1996-07-31 | 四川理县理成铁合金厂 | High calcium-silicon iron |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1196395A (en) | 1998-10-21 |
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| C14 | Grant of patent or utility model | ||
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Owner name: TAIXI GROUP LTD. Free format text: FORMER NAME OR ADDRESS: SHITANJING MINING AFFAIRS BUREAU |
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| CP01 | Change in the name or title of a patent holder |
Patentee after: Taixi Group Co.,Ltd. Patentee before: Shitanjing Mining Affairs Bureau |
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| ASS | Succession or assignment of patent right |
Owner name: NINGXIA HELAN MOUNTAIN FERROALLOY CO.,LTD. Free format text: FORMER OWNER: NINGXIA COAL GROUP CO.,LTD. Effective date: 20050812 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Owner name: NINGXIA COAL GROUP CO.,LTD. Free format text: FORMER NAME OR ADDRESS: TAIXI GROUP CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 750000 No. 208 Shengli East Street, Dawukou District, Ningxia, Shizuishan Patentee after: Ningxia coal industry Refco Group Ltd. Address before: 753000, the Ningxia Hui Autonomous Region, Dawukou, Shizuishan Shengli East Street Helan ferroalloy plant Patentee before: TAIXI GROUP Co.,Ltd. |
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Effective date of registration: 20050812 Address after: 750000 No. 208 Shengli East Street, Dawukou District, Ningxia, Shizuishan Patentee after: Ningxia Helanshan Ferroalloy Co.,Ltd. Address before: 750000 No. 208 Shengli East Street, Dawukou District, Ningxia, Shizuishan Patentee before: Ningxia coal industry Refco Group Ltd. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19990915 Termination date: 20100729 |