Calcium carbide with diversified raw materials and preparation method of calcium carbide

Abstract

The invention belongs to the technical field of calcium carbide chemical industry, and discloses a raw material diversified calcium carbide, which takes coke prepared from bituminous coal, quick lime and fluorite as main raw materials, and the mass ratio of the coke prepared from bituminous coal to the quick lime to the fluorite is 100:(80-145):(0.01-5). According to the invention, the coke prepared from bituminous coal is uniformly mixed with the quick lime and the fluorite, and thus mass transfer and reaction acceleration are facilitated. The invention also discloses a preparation method of the raw material diversified calcium carbide, which comprises the following steps: washing bituminous coal, preparing coke, crushing the coke, respectively crushing and sieving the quick lime and the fluorite, conducting mixing, uniformly mixing an adhesive with the raw materials, pressing the materials into a spherical or semispherical raw material by using a ball press, conducting drying until the water content is less than or equal to 6%, taking the raw material as a calcium carbide raw material, and feeding the raw material into an electric arc furnace to smelt the calcium carbide. According to the production method for preparing the calcium carbide, the reaction temperature is reduced, the problem of scaling of the calcium carbide furnace wall can be solved, the electric energy consumption of the calcium carbide can be reduced, and the method has a relatively great application prospect.

Description

technical field [0001] The invention relates to the technical field of calcium carbide chemical industry, in particular to a method for preparing calcium carbide in which semi-coke is replaced by coal powder. Background technique [0002] In 1862, Hare and Wohler used Zn, Ca and C to prepare CaC for the first time in the laboratory. 2 , three decades later Moisson and Willson made CaC in an electric furnace from CaO and coal 2 , that is calcium carbide. Calcium carbide is one of the important basic chemical raw materials. The acetylene produced by the reaction of calcium carbide and water can be further synthesized into related series of products, such as acetaldehyde, acetic acid, vinyl acetate, polyvinyl alcohol, synthetic fiber, synthetic rubber, synthetic resin and organic solvents. [0003] In the calcium carbide furnace, the high-temperature heat energy generated by the short-circuit arc between the three-phase electrodes is used to melt quicklime, coke and other raw...

AI Technical Summary

Problems solved by technology

CN101172605B discloses a method for synthesizing calcium carbide with coal powder, but coal powder is easy to graphitize at high temperature, has low porosity, poor chemical reactivity, and cannot be used as a reducing agent for producing calcium carbide

Therefore, in the current actual production, only a small amount of anthracite is added to the coke, and the anthracite will float on the upper layer of the reaction system during production, which is difficult to melt and react, and has not really solved the problem of diversification of calcium carbide raw materials or cost reduction.