High-temperature ball press system and method for producing calcium carbide

Abstract

The invention relates to a high-temperature ball press system and method for producing calcium carbide. The system comprises an adjustable pyrolyzing furnace, a ball press machine, an oxygen-heat-process calcium carbide furnace and an oxygen-coal lance, wherein the adjustable pyrolyzing furnace comprises a limestone powder feed port, a coal powder feed port, a feed opening and a fume inlet; an adjustable-inclination baffle is arranged in a furnace chamber of the adjustable pyrolyzing furnace; a clearance is left between the baffle and the adjustable pyrolyzing furnace; the baffle is provided with pinholes; the ball press machine comprises a limestone powder / carbon powder inlet and a limestone powder / carbon powder feed opening; the oxygen-heat-process calcium carbide furnace comprises a feed port, a fume outlet and a discharge port; a spray head of the oxygen-coal lance is arranged in the oxygen-heat-process calcium carbide furnace; and the oxygen lance extends into the oxygen-heat-process calcium carbide furnace from the furnace roof of the oxygen-heat-process calcium carbide furnace. According to the system and method, by arranging the adjustable-inclination baffle in the adjustable pyrolyzing furnace, the reaction time of the raw materials in the furnace can be conveniently controlled, thereby ensuring the raw material reaction degree and efficiency.

Description

technical field [0001] The present invention generally relates to a system and method for producing calcium carbide, in particular to a system and method for producing calcium carbide by high-temperature pressure balls. Background technique [0002] Calcium carbide, commonly known as calcium carbide, is produced by the reaction of coke and calcium oxide. It is an important coal chemical product and basic chemical raw material. It is mainly used in the production of acetylene and acetylene-based chemical products, including vinyl chloride series, vinyl acetate series and acrylic-based products. . Calcium carbide plays a very important role in the development of my country's national economy, and the output of calcium carbide has been increasing continuously in the past ten years. [0003] Although the calcium carbide industry has been developed for many years, the current calcium carbide production process still mainly adopts the method of electric arc heating, that is, the ...

AI Technical Summary

Problems solved by technology

The disadvantages of this technology are: need to use high-priced lump coke and lime as raw materials; use electric energy to generate heat, high power consumption, and high energy cost; use coal powder and lime powder to press balls and then enter the pyrolysis process The overflow of volatile gas will easily cause the breakage of the pellets, resulting in an increase in the pulverization rate of the balls; because the arc is almost in the center of the electric arc furnace, the utilization efficiency of the unit furnace capacity is limited, and the output is low; the amount of high-temperature flue gas generated is relatively small. Each ton of calcium carbide produces about 400m 3 , the related heat energy is difficult to recover

The shortcoming of this technology is: need to utilize high price lump coke and lime as raw material

The main problem of the current oxythermal method is that it does not solve the problem of the block material reaction, that is, due to the small specific surface area of ​​the block material, the raw material needs to be reacted at a relatively high temperature, resulting in high production energy consumption of the system

At present, the production raw materials of the oxythermal method are still relatively expensive lump coke and limestone, which has not effectively reduced the cost of raw materials

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