Recycling device and method for preparing active calcium oxide as calcium carbide raw material from carbide slag

Abstract

The invention discloses a cyclic utilization device and method for preparing active calcium oxide from carbide slag as a calcium carbide raw material. The cyclic utilization device comprises slurry preparation equipment, a rotary liquid slag removal device, impurity removal and refining equipment, a washing and filtering device, an extrusion forming device and a calcining furnace, the slurry preparation equipment, the rotary liquid deslagging device, the impurity removal refining equipment, the washing and filtering device, the extrusion forming device and the calcining furnace are sequentially connected, the slurry preparation equipment comprises a slurry preparation tank and coarse slurry storage tanks, and the output end of the slurry preparation tank is fixedly communicated and connected with the three coarse slurry storage tanks through three feeding branch pipes respectively; and the three coarse slurry storage tanks are respectively and fixedly communicated and connected with the input end of the rotary liquid deslagging device through three discharging branch pipes. The invention relates to a process for producing a lime raw material for calcium carbide industry by using carbide slag, which is characterized in that the carbide slag generated by acetylene production is treated to prepare the lime raw material for calcium carbide, and in addition, calcium is used as a carrier to realize carbide slag-lime-calcium carbide-carbide slag closed cycle.

Description

technical field [0001] The invention relates to the technical field of calcium carbide production, in particular to a recycling device and a method for preparing active calcium oxide from calcium carbide slag as a raw material for calcium carbide. Background technique [0002] Lime is an indispensable and important raw material for national economic construction. It is not only used in construction and road engineering, but also widely used in metallurgy, chemical industry, light industry, food, environmental protection and agriculture. In recent years, with the rapid development of steel and calcium carbide production of PVC, the lime industry has also developed rapidly. The distribution of limestone resources is uneven and there is a relative shortage of limestone. After years of mining, limestone can no longer meet the needs of the lime industry. [0003] Carbide slag is the waste residue produced by the hydrolysis of calcium carbide in the process of industrial producti...

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Problems solved by technology

[0005] In order to solve the technical defects of existing technology such as lack of lime, pollution of the environment by carbide slag, and low recycling rate of raw materials during the use of calcium carbide, the present invention provides a recycling device and its method

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