CN1322847A - Compound Si-Ca-Ba deoxidant producing process and equipment - Google Patents
Compound Si-Ca-Ba deoxidant producing process and equipment Download PDFInfo
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- CN1322847A CN1322847A CN 01115449 CN01115449A CN1322847A CN 1322847 A CN1322847 A CN 1322847A CN 01115449 CN01115449 CN 01115449 CN 01115449 A CN01115449 A CN 01115449A CN 1322847 A CN1322847 A CN 1322847A
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- calcium
- silicon
- barite
- lime
- 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, purity 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-barium composite deoxidant and equipment used by the production process.
At present, the production process of silicon-calcium-barium in China mainly uses a submerged arc furnace for production, the silicon-calcium-barium produced by the method has high power consumption and unstable product quality, and the silicon-calcium-barium is produced by an intermediate frequency furnace with a graphite crucible as a lining, so that the power consumption is greatly reduced, and the product quality is stable.
With the development of the steel market, it is a desire of manufacturers to produce low-cost silico-calcium-barium, and the present inventors have invented the production process of silico-calcium-barium compound deoxidizer and the equipment used in the process.
The invention aims to provide a smelting method of a silicon-calcium-barium composite deoxidizer with stable production quality and reduced cost, which mainly comprises the improvement of a smelting process and equipment of the silicon-calcium-barium composite deoxidizer.
The invention is realized by the following steps: the production process of the silicon-calcium-barium 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, barite, fluorite, coke particles and the like, and the weight percentages of the silica: lime: barite: 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, barite, fluorite, coke particles, etc
Raw materials.The raw materials are as follows: silica: SiO 22More than 97% lime: CaO>80% barite: BaSO4More than 90% fluorite: CaF2More than 80% of coke particles: fixed carbon is more than 80 percent
2. Preparing materials: the proportion of the ingredients can be properly adjusted according to the content of silicon, calcium and barium in the silicon-calcium-barium compound 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 withan electrode graphite crucible as a lining, heating the furnace to 1400 ℃ with the reference of the full charging of the raw materials, 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. Its size has no other requirements.
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 composite Si-Ca-Ba deoxidant containing over 15 Ba is prepared with SiO as the first material250kg of silica>97%; CaO is more than 80 percent, and 50kg of lime; BaSO450kg of more than 90 percent barite; CaF220kg of fluorite with the weight percentage of more than 80 percent; 20kg of coke particles with fixed carbon more than 80 percent. The rawmaterials are mixed evenly and put into a crusher to be crushed into powder with the granularity of 80-120 meshes, the crushed raw materials are put into an intermediate frequency furnace with an electrode graphite crucible lining, the furnace temperature is raised to 1400 ℃ and then the temperature is kept for 1 hour, and then the product is obtained after discharging.
The product produced in this example was assayed and found to contain 31.24% calcium and 16.32% barium.
Claims (3)
1. A production process of a silicon-calcium-barium 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, barite, fluorite, coke particles and the like, and the weight percentages are as follows: silica: lime: barite: fluorite: the scorched particles = 2-4: 3-5: 2-4: 1.
2. A special production device of a silicon-calcium-barium composite deoxidizer comprises: it is characterized in that the device is an intermediate frequency furnace taking an electrode graphite crucible as a lining.
3. The crucible as set forth in claim 2, wherein: is machined from graphite electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011154497A CN1150339C (en) | 2001-04-26 | 2001-04-26 | Compound Si-Ca-Ba deoxidant producing process and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011154497A CN1150339C (en) | 2001-04-26 | 2001-04-26 | Compound Si-Ca-Ba deoxidant producing process and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1322847A true CN1322847A (en) | 2001-11-21 |
| CN1150339C CN1150339C (en) | 2004-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011154497A Expired - Fee Related CN1150339C (en) | 2001-04-26 | 2001-04-26 | Compound Si-Ca-Ba deoxidant producing process and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1150339C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184313A (en) * | 2013-03-29 | 2013-07-03 | 河南科技大学 | Steel making composite deoxygenation agent and preparation method thereof |
-
2001
- 2001-04-26 CN CNB011154497A patent/CN1150339C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184313A (en) * | 2013-03-29 | 2013-07-03 | 河南科技大学 | Steel making composite deoxygenation agent and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1150339C (en) | 2004-05-19 |
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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 |