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Method for synthesizing calcium carbide smelting raw material by extruding blue coke and lime powder

A technology for synthesizing calcium carbide and powder, applied in the direction of carbide, calcium carbide, etc., can solve the problems that calcined coal, blue carbon and white ash powder cannot be used, cannot be widely promoted and used, and the process cost is high, and can achieve product qualification, environmental protection and cost. low cost effect

Inactive Publication Date: 2011-11-23
宁夏兴平精细化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, because the electrode cost of the hollow electrode is more than three times that of the ordinary electrode, the process cost is high and the technical requirements are high, and it cannot be widely popularized and utilized, resulting in calcined coal, semi-coke and lime powder becoming unusable industrial solid waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Take 45% of semi-coke powder (with a particle size below 1mm), 45% of lime powder (with a particle size below 0.5mm), and 10% of fragmented medium-temperature coal tar pitch (melted state), mix them according to the above quantitative ratio, and add them to Stir in a constant temperature stirring pot at 200°C for 15 minutes, open the outlet of the stirring pot, feed the mixture into the inlet of the extrusion molding machine, turn on the extrusion molding machine to extrude the mixture into elliptical pellets with a long axis of 3cm, After natural cooling, it can become the pellet raw material for calcium carbide smelting. The raw material (the main content indicators of the pellets are 43% fixed carbon; 42% calcium oxide; 3% hydrocarbons; 10% ash; 2% volatile matter.) is mixed with white ash, blue charcoal or Calcined coal can be put into the furnace to smelt calcium carbide, and the carbon and calcium oxide required for calcium carbide smelting can participate in the ...

Embodiment 2

[0013] Take 42% of semi-coke powder (with a particle size below 1mm), 48% of lime powder (with a particle size below 0.5mm), and 10% of fragmented medium-temperature coal tar pitch (melted state), mix them according to the above quantitative ratio, and add them to Stir in a constant temperature stirring pot at 220°C for 15 minutes, open the outlet of the stirring pot, feed the mixture into the inlet of the extrusion molding machine, turn on the extrusion molding machine to extrude the mixture into elliptical pellets with a long axis of 3cm, After natural cooling, it can become the pellet raw material for calcium carbide smelting. The raw material is mixed with lime, semi-coke or calcined coal in a certain proportion, and can be put into the furnace to smelt calcium carbide, so that the carbon and calcium oxide required for calcium carbide smelting can participate in the smelting reaction.

Embodiment 3

[0015] Take 48% of semi-coke powder (with a particle size below 1mm), 44% of lime powder (with a particle size below 0.5mm), and 8% of fragmented medium-temperature coal tar pitch (melted state), mix them according to the above quantitative ratio, and add them to Stir in a constant temperature stirring pot at 200°C for 10 minutes, open the outlet of the stirring pot, feed the mixture into the inlet of the extrusion molding machine, turn on the extrusion molding machine to extrude the mixture into elliptical pellets with a long axis of 4cm, After natural cooling, it can become the pellet raw material for calcium carbide smelting. The raw material is mixed with lime, semi-coke or calcined coal in a certain proportion, and can be put into the furnace to smelt calcium carbide, so that the carbon and calcium oxide required for calcium carbide smelting can participate in the smelting reaction.

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Abstract

The invention relates to a method for synthesizing a calcium carbide smelting raw material by extruding blue coke and lime powder. The method comprises the following steps: evenly mixing blue coke powder, lime powder and middle-temperature coal tar pitch based on the weight ratio of (42-48%):(42-48%):(8-12%); then stirring the mixed powder at constant temperature of 200-220 DEG C for 10-15 minutes; and finally extruding the powder into elliptical pellets by utilizing a mixture extrusion molding machine, and naturally cooling to finally obtain the calcium carbide smelting raw material. By utilizing the method, the blue coke and the lime can be fully utilized in a calcium carbide smelting process in the case of low cost and low technical requirements, thus achieving the purposes of lowering cost, saving resource and protecting environment.

Description

technical field [0001] The invention relates to the technical field of calcium carbide smelting, in particular to a method for synthesizing calcium carbide smelting raw materials by extruding semi-coke and lime powder. Background technique [0002] When calcined coal, semi-coke or lime powder is used for calcium carbide smelting, hollow electrodes must be used. In this method, since the electrode cost of the hollow electrode is more than three times that of the ordinary electrode, the process cost is high and the technical requirements are high, and it cannot be widely popularized and utilized, resulting in calcined coal, semi-coke and lime powder becoming unusable industrial solid waste. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a low-cost and low-technical method of extruding semi-coke and lime powder to synthesize calcium carbide smelting raw materials. [0004] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/32C01B32/942
Inventor 高尚忠
Owner 宁夏兴平精细化工股份有限公司
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