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Calcium carbide production method

A production method and calcium carbide technology, applied in the direction of carbide, calcium carbide, etc., can solve the problems of high energy consumption, high investment, high pollution, etc., and achieve the effects of low cost, high utilization rate and low reaction temperature

Inactive Publication Date: 2008-12-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problem of "high investment, high energy consumption, and high pollution" in the production of calcium carbide. Through a lot of research and creative work, the inventor has developed a calcium carbide with simple process, low energy consumption, wide source of raw materials and low cost. production method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 120 grams of CaO with a particle size of 0.63mm, 150 grams of coke with a particle size of 0.63mm and 66 liters of oxygen were sprayed into the reactor to make the raw material temperature reach 1750°C, react for 10 minutes and cool to normal temperature, and the solid product was taken out to obtain The amount of solid product is 192g, the calcium carbide content is 68%, and the gas generation is 237L / kg.

Embodiment 2

[0025] Using 48 liters of calcium carbide to produce by-product gas CO and 120 liters of air combustion, preheat 120g of calcium oxide with a particle size of 0.13mm and 110g of coke with a particle size of 0.13mm to 1500°C, and then spray the preheated material with 60 liters of oxygen Put into the reactor, make the raw material temperature reach 1750 ℃, cool to normal temperature after reacting for 5 minutes, take out the solid product, the obtained solid product is 149g, the calcium carbide content is 78%, and the gas generation is 274L / kg.

Embodiment 3

[0027] Spray 120g of normal-temperature calcium oxide with a particle size of 0.13mm, 125g of normal-temperature coke with a particle size of 0.13mm and 128 liters of oxygen into the reactor to make the temperature of the raw materials reach 1950°C, react for 2 minutes and cool to normal temperature, take out the solid product, and obtain a solid The product amount is 144g, the calcium carbide content is 88%, and the gas generation volume is 309L / kg.

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PUM

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Abstract

The invention relates to a carbide preparation method belonging to the field of carbide preparation. The conventional carbide preparation technology adopts block materials and electric arc as a heat-supply, while the preparation method according to the invention adopts powdery carbon-containing materials and powdery calcium-containing materials, and the combustion of partial carbon-containing materials and oxygen-containing gas as a heat-supply at 1700-2300 DEG C to prepare carbide, wherein the carbon-containing materials is coal or coke, calcium-containing materials is calcium carbonate, calcium oxide, calcium hydroxide or carbide slag, the granularity of the carbon-containing materials and calcium-containing materials is less than 1mm, and the quality ratio is 0.5-3:1. The oxygen-containing gas for combustion is oxygen, oxygen-enriched air or air. The method solves the problems of high energy consumption and high pollution of the carbide preparation and has advantages of wide choice scope of materials, high energy utilization rate, continuous operation and large production capacity. The technology also couples with the process of carbon-containing materials coking and calcium-containing materials calcining, preheats the materials to 500-1500 DEG C utilizing the combustion of by-products CO of the carbide preparation and the assistant fuel, thereby further reducing the oxygen and energy consumption of the carbide preparation.

Description

Technical field: [0001] The present invention relates to a production method of calcium carbide, in particular to the combustion pre-combustion of powdery carbon-containing raw materials and powdery calcium-containing raw materials through partial combustion in an oxygen-containing atmosphere to directly produce calcium carbide, and use the calcium carbide to produce by-product CO and auxiliary fuel. Hot powdered ingredients. Background technique: [0002] Calcium carbide, commonly known as calcium carbide (CaC 2 ), known as the mother of organic synthesis before the middle of last century. At present, it is mainly used to produce series products such as vinyl chloride, vinyl acetate and acrylic acid. For example, about 70% of PVC (polyvinyl chloride) production in China comes from calcium carbide acetylene. In recent years, the high price of oil has stimulated the development of calcium carbide industry. The output of calcium carbide in my country increased from 4.25 mill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/32C01B32/942
Inventor 刘振宇刘清雅李国栋唐旭博
Owner BEIJING UNIV OF CHEM TECH
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