CN1227376C - Production process and apapratus of composite calcium carbide deoxygenating and purifying agent - Google Patents
Production process and apapratus of composite calcium carbide deoxygenating and purifying agent Download PDFInfo
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- CN1227376C CN1227376C CN 02100038 CN02100038A CN1227376C CN 1227376 C CN1227376 C CN 1227376C CN 02100038 CN02100038 CN 02100038 CN 02100038 A CN02100038 A CN 02100038A CN 1227376 C CN1227376 C CN 1227376C
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- agent
- steel
- raw material
- carbide
- purifying agent
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Abstract
The present invention relates to a compound deoxidizing and purifying agent which is prepared from several general raw materials through reduction reactions in a purpose-made medium frequency furnace. The agent is mainly used for steel making. The production method comprises the steps: lime is used as a main raw material, and the main raw material and other auxiliary materials, such as fluorite, coke or coal, etc., are compounded, pulverized, smelted, cast, etc. to prepare the compound deoxidizing and purifying agent. The agent can be used as a compound deoxidizing agent and a desulfurizing agent, and has the advantages of impurity absorption in steel, liquid steel purification, molten steel fluidity increase, inclusion state improvement in steel and quality improvement.
Description
Technical field
The invention belongs to the metallurgy industry production field, relate to a kind of production technique of carbide of calcium composite purifying agent.
Background technology
At present, the technology that China produces carbide of calcium mainly is to use the hot stove production in ore deposit, and the carbide of calcium power consumption that this method is produced is high and investment is big.It is the medium-frequency induction furnace of liner that the present invention adopts with the electrode graphite crucible, produce carbide of calcium power consumption is reduced, and constant product quality.
Summary of the invention
The object of the present invention is to provide a kind of quality of production stable, the smelting process of the carbide of calcium complex deoxidization scavenging agent that cost reduces.
The present invention is achieved in that the production technique of carbide of calcium composite purifying agent of the present invention comprises raw material crushing, mixing, melting, casting, packing warehouse-in operation.It is characterized in that: raw material comprises lime, fluorite, coke or coal, and its weight percent is: lime: fluorite: coke or coal=4-8: 1-4: 0.5-3
Embodiment
Production technique of the present invention comprises: 1, raw material is selected for use; 2: batching; 3: melting; 4: casting; 5: pack five aspects.
1, raw material is selected for use: raw material comprises lime, fluorite, coke or four kinds of raw materials of coal.
2, ingredient requirement is as follows: lime: CaO＞80%.
Fluorite: CaF
2＞80%
Coke, coal: fixed carbon C＞70%
3, batching: can suitably adjust ratio of components according to the carbide of calcium composite purifying agent gas forming amount of producing.It is stand-by to be ground into granularity 80-120 purpose meal after finishing by ratio of components batching, and lime powder is broken into the 1-6 centimetre.
4, melting: the Graphite Electrodes crucible of the raw material input after will pulverizing is in the liner medium-frequency induction furnace, throws full fire door with raw material and is as the criterion, furnace temperature is raised to the 1400-2300 degree after insulation come out of the stove after 2.5-3 hour.
The chemical equation that is carried out is as follows:
Join X kilogram carbon materials representation formula with 100 kilograms of lime:
X=((3C/CaC
2) * 100 * B/C+E)/((CaO/CaC
2In the formula of) * 100 * B/A+E+D): A---calcium oxide content in the carbon (CaO%)
B---carbide of calcium content (CaC in the calcium carbide
2%)
C---fixed carbon content (C%) in the carbon raw
D---the weight of free CaO (seeing the following form) in the calcium carbide
E---go into hearthstone ash loss amount and generally get 7%
F---go into the loss amount of stove carbon raw, generally get 4%.
The relation of free CaO and calcium carbide composition, gas forming amount is as follows:
| Gas forming amount (L/Kg) | CaO content (%) | Free CaO amount (%) | Gas forming amount (L/Kg) | CaC 2Content (%) | Free CaO amount (%) |
| 220 | 59.11 | 28 | 280 | 75.23 | 16 |
| 230 | 61.79 | 26 | 290 | 77.91 | 14 |
| 240 | 64.48 | 24 | 300 | 80.60 | 12 |
| 270 | 72.54 | 18 |
Carbide of calcium be can be represented by the formula by the reaction of water decomposition:
If decompose carbide of calcium with the water that drips, when just carbide of calcium is superfluous, following reaction takes place also except that above-mentioned reaction then:
This reaction formula is enough to also illustrate that carbide of calcium is a kind of strong dewatering agent.
4, tapping casting: treat after the intermediate frequency furnace inclination liquid in the stove to be poured in the mould after raw material melts fully.
5, packing warehouse-in: the carbide of calcium outward appearance is versicolor blocks.Its color is different and different with the content of carbide of calcium, and gray, brown or black, new section gray is arranged, and works as CaC
2Then be purple when content is higher.
It is the intermediate frequency furnace of liner that the improvement of melting equipment of the present invention is to use with the Graphite Electrodes, and it is characterized by crucible is that Graphite Electrodes makes after inside hollows out, and its size does not have other requirement, decides according to the furnace diameter size.
Claims (1)
1, a kind of production technique of carbide of calcium complex deoxidization scavenging agent, comprise that raw material is selected for use, batching, melting, casting, packing warehouse-in operation, it is characterized in that, raw material comprises lime, fluorite, coke or coal, and its weight percent is: lime: fluorite: coke or coal=4-8: 1-4: 0.5-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02100038 CN1227376C (en) | 2002-01-09 | 2002-01-09 | Production process and apapratus of composite calcium carbide deoxygenating and purifying agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02100038 CN1227376C (en) | 2002-01-09 | 2002-01-09 | Production process and apapratus of composite calcium carbide deoxygenating and purifying agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1375561A CN1375561A (en) | 2002-10-23 |
| CN1227376C true CN1227376C (en) | 2005-11-16 |
Family
ID=4739155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02100038 Expired - Fee Related CN1227376C (en) | 2002-01-09 | 2002-01-09 | Production process and apapratus of composite calcium carbide deoxygenating and purifying agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1227376C (en) |
-
2002
- 2002-01-09 CN CN 02100038 patent/CN1227376C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1375561A (en) | 2002-10-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051116 Termination date: 20110109 |