CN1322849A - Compound Si-Ca-Mg deoxidant producing process and equipment - Google Patents
Compound Si-Ca-Mg deoxidant producing process and equipment Download PDFInfo
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- CN1322849A CN1322849A CN 01115452 CN01115452A CN1322849A CN 1322849 A CN1322849 A CN 1322849A CN 01115452 CN01115452 CN 01115452 CN 01115452 A CN01115452 A CN 01115452A CN 1322849 A CN1322849 A CN 1322849A
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- calcium
- silicon
- lime
- steel
- deoxidant
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Abstract
The compound deoxidant is produced with common materials and through reduction in MF furnace and is used mainly for final deoxidation of molten steel. It is produced by using silica, lime and barite as main material, fluotrite, granular coke, etc. as supplementary material, and through mixing, smelting, casting, and other steps. The compound deoxidant for deoxidation and desulfurization may be used to absorb impurity in steel, raise molten steel flowability, improve the form of foreign material in steel, purify molten steel and raise steel quality.
Description
The invention belongs to the production field of deoxidants in metallurgical industry, and relates to a production process of a silicon-calcium-magnesium composite deoxidant and equipment used by the production process.
At present, the production process of silicon, calcium and magnesium in China mainly uses a submerged arc furnace for production, the silicon, calcium and magnesium produced by the method has high power consumption and unstable product quality, and the silicon, calcium and magnesium produced by the medium frequency furnace with a graphite crucible as a lining greatly reduces the power consumption and has stable product quality.
With the development of the steel market, it is a desire of manufacturers to produce Si-Ca-Mg with low cost, and the present inventors have invented a production process of Si-Ca-Mg composite deoxidizer and the equipment used in the process.
The invention aims to provide a smelting method of a silicon-calcium-magnesium compound deoxidizer with stable production quality and reduced cost, which mainly comprises the improvement of a smelting process and equipment of the silicon-calcium-magnesium compound deoxidizer.
The invention is realized by the following steps: the production process of the silicon-calcium-magnesium alloy comprises the working procedures of crushing and uniformly mixing raw materials, smelting, heating, packaging, warehousing and the like. The method is characterized in that: the raw materials comprise silica, lime, dolomite, fluorite, coke particles and the like, and the weight percentages of the silica: lime: dolomite: fluorite: the scorched particles = 2-4: 3-5: 2-4: 1.
The production process comprises the following steps: 1. selecting raw materials; 2. preparing materials; 3. smelting; 4. and discharging and casting. 1. Raw materials are selected: the raw materials include five kinds of silica, lime, dolomite, fluorite, coke particles, etc
Raw materials.The raw materials are as follows: silica: SiO 22More than 97% lime: CaO>80% dolomite: MgO>15% fluorite: CaF2More than 80% of coke particles: fixed carbon is more than 80% 2, and the ingredients are as follows: the proportion of the ingredients can be properly adjusted according to the contents of silicon, calcium and magnesium in the silicon-calcium-magnesium composite deoxidizer to be produced. After the materials are mixed according to the mixture ratio, the mixture is put into a crusher to be crushed into powder with the granularity of 80-120 meshes for standby. 3. Smelting: and (3) putting the crushed raw materials into an intermediate frequency furnace with an electrode graphite crucible lining, taking the fact that the furnace opening is filled with the raw materials as a standard, raising the temperature of the furnace to 1400 ℃, preserving the heat for 1 hour, and discharging the furnace. The chemical reaction was carried out as follows (1400 degrees): 4. discharging and casting: after the raw materials are completely melted, the intermediate frequency furnace is inclined, and then liquid in the furnace is poured into the ingot mold.
The improvement of the smelting equipment of the invention is that an intermediate frequency furnace with an electrode graphite crucible as a lining is used. It is characterized in that the crucible is made by hollowing the graphite electrode.
The invention has the advantages that: the raw materials are added at one time according to an accurate mixing ratio, so that the product quality is stable, unnecessary procedures are reduced, the power consumption is reduced, and the yield is improved.
Example (c): the production of calcium is required to be more than 30; the Si-Ca-Mg composite deoxidant containing more than 5 Mg is prepared with SiO as the first material250kg of silica>97%; CaO is more than 80 percent, and 50kg of lime; MgO is more than 15 percent and 50kg of dolomite; CaF220kg of fluorite with the weight percentage of more than 80 percent; 20kg of coke particles with fixed carbon more than 80 percent. Mixing the above materials, pulverizing into 80-120 mesh powderAnd (3) putting the crushed raw materials into an intermediate frequency furnace with an electrode graphite crucible lining, taking the charging opening of the raw materials as a standard, raising the temperature of the furnace to 1400 ℃, preserving the heat for 1 hour, and discharging the furnace to obtain the product.
The product produced in this example was assayed and found to contain 34.24% calcium and 8.32% magnesium.
Claims (2)
1. A production process of a silicon-calcium-magnesium composite deoxidizer comprises the following steps: the method comprises the procedures of raw material selection, proportioning, smelting, tapping and casting and the like, and is characterized in that: the raw materials comprise silica, lime, dolomite, fluorite, coke particles and the like, and the weight percentage is as follows:
silica: lime: dolomite: fluorite: scorched particles = 2-4: 3-5: 2-4: 1
2. A special production device of a silicon-calcium-magnesium composite deoxidizer comprises: it is characterized in that the device is an intermediate frequency furnace taking an electrode graphite crucible as a lining. The crucible is characterized in that the crucible is formed by machining electrode graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011154527A CN1151283C (en) | 2001-04-26 | 2001-04-26 | Compound Si-Ca-Mg deoxidant producing process and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011154527A CN1151283C (en) | 2001-04-26 | 2001-04-26 | Compound Si-Ca-Mg deoxidant producing process and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1322849A true CN1322849A (en) | 2001-11-21 |
| CN1151283C CN1151283C (en) | 2004-05-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011154527A Expired - Fee Related CN1151283C (en) | 2001-04-26 | 2001-04-26 | Compound Si-Ca-Mg deoxidant producing process and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1151283C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965530A (en) * | 2012-12-04 | 2013-03-13 | 纪征礼 | Silicon-calcium-magnesium smelting method and silicon-calcium-magnesium product produced by using method |
-
2001
- 2001-04-26 CN CNB011154527A patent/CN1151283C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102965530A (en) * | 2012-12-04 | 2013-03-13 | 纪征礼 | Silicon-calcium-magnesium smelting method and silicon-calcium-magnesium product produced by using method |
| CN102965530B (en) * | 2012-12-04 | 2014-09-10 | 纪征礼 | Silicon-calcium-magnesium smelting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1151283C (en) | 2004-05-26 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |