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Calcium carbide smelting process by oxygen heating method

An oxygen-thermal method and calcium carbide technology are applied in the field of smelting to achieve good reaction kinetic conditions, reduce production energy consumption, and broaden the source of raw materials.

Active Publication Date: 2016-02-03
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the oxythermal method has become an important development direction of calcium carbide production, but it is basically still in the experimental stage, and a lot of exploratory research and experiments are needed to realize industrialization

Method used

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  • Calcium carbide smelting process by oxygen heating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Use a preheater to preheat quicklime powder with a particle size of 0-3mm to 950°C, so that the remaining limestone (CaCO 3 ) is fully decomposed into quicklime (CaO);

[0022] 2. Use a dryer to preheat the coke powder with a particle size of 0-3mm to 200°C to reduce the moisture content of the coke powder to below 1%;

[0023] 3. Spray the preheated quicklime powder and coke powder into the melting reaction furnace respectively;

[0024] 4. Control the mass ratio of coke powder and quicklime powder sprayed into the melting reactor to 1.5:1;

[0025] 5. The amount of pure oxygen injected into the top of the furnace is 600Nm 3 / t(coke powder);

[0026] 6. Part of the coke powder and pure oxygen burn to release heat. The temperature in the melting reaction furnace reaches 1500 ° C. Quick lime powder and coke powder react rapidly in the melting reaction furnace. After producing liquid calcium carbide, it is discharged from the lower part of the melting reaction furna...

Embodiment 2

[0029] 1. Use a preheater to preheat quicklime powder with a particle size of 0-2mm to 1000°C, so that the remaining limestone (CaCO 3 ) is fully decomposed into quicklime (CaO);

[0030] 2. Use a dryer to preheat the blue charcoal powder with a particle size of 0-1mm to 250°C to reduce the moisture content of the blue charcoal powder to below 1%;

[0031] 3. Spray the preheated quicklime powder and blue charcoal powder into the melting reaction furnace respectively;

[0032] 4. Control the mass ratio of blue charcoal powder and quicklime powder sprayed into the melting reactor to be 1.8:1;

[0033] 5. The amount of pure oxygen injected into the top of the furnace is 800Nm 3 / t (blue charcoal powder);

[0034] 6. Part of the blue charcoal powder and pure oxygen burn to release heat, the temperature in the melting reaction furnace reaches 1800 ℃, quicklime powder and blue charcoal powder react rapidly in the melting reaction furnace, and after producing liquid calcium carbid...

Embodiment 3

[0037] 1. Use a preheater to preheat quicklime powder with a particle size of 0-1mm to 1100°C, so that the remaining limestone (CaCO3 ) is fully decomposed into quicklime (CaO);

[0038] 2. Use a dryer to preheat the pulverized coal with a particle size of 0-0.5mm to 300°C to reduce the moisture content of the pulverized coal to below 1%;

[0039] 3. Spray the preheated quicklime powder and coal powder into the melting reaction furnace respectively;

[0040] 4. Control the mass ratio of coal powder and quicklime powder sprayed into the melting reactor to 2.2:1;

[0041] 5. The amount of pure oxygen injected into the top of the furnace is 1000Nm 3 / t(coal powder);

[0042] 6. Part of the coal powder and pure oxygen combust to release heat, the temperature in the melting reaction furnace reaches 2200 ℃, quick lime powder and coal powder react rapidly in the melting reaction furnace, and after producing liquid calcium carbide, it is discharged from the lower part of the melting...

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Abstract

The invention provides a calcium carbide smelting process by an oxygen heating method. The processing process is realized with supports of a fusion reacting furnace, a preheater, a drier, a heat exchanger, pure oxygen equipment and raw materials, wherein, pulverized quick lime is preheated to 950-1200 DEG C by the preheater; coke powder or semi-coke powder or coal dust or mixed carbonaceous powder are preheated to 200-400 DEG C by the drier, and the water content is reduced to less than 1%; preheated raw materials are injected into the fusion reacting furnace, the combustion temperature is 1500-2500 DEG C, liquid state calcium carbide generates in the condition, the liquid state calcium carbide is discharged from a calcium carbide outlet of the fusion reacting furnace, and gas generated in the fusion reacting furnace is discharged from a gas outlet at a furnace roof; the process solves the technology problem of the calcium carbide smelting process by the oxygen heating method, and environmental protection and energy saving effects are solved.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to an oxythermal method for smelting calcium carbide. Background technique [0002] The main component of calcium carbide is C a C 2 , is an important basic raw material in the organic synthesis industry, and is widely used in a variety of organic synthesis products. At present, the main method of industrial production of calcium carbide is the electrothermal method, which has a long history and mature technology, but this method needs to use bulk raw materials to produce calcium carbide, which has the disadvantages of long reaction time, high reaction temperature, large power consumption, low production efficiency, and dust. It belongs to the typical three-high technology of "high investment, high pollution, and high energy consumption", which does not meet the requirements of energy saving, emission reduction and sustainable development. [0003] Due to the many disadvantages ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/32C01B32/942
CPCY02P20/10Y02P20/129
Inventor 唐恩王小伟
Owner WISDRI ENG & RES INC LTD
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