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Process for preparing high calcium carbide product and producing calcium carbide carbide using calcium carbide waste slag

A technology of calcium carbide slag and calcium carbide, applied in the removal of carbide, calcium carbide, solid waste, etc., can solve problems such as vegetation damage to soil and water, ecological environment damage, environmental pollution, etc., and achieve waste utilization, energy saving, environmental pollution reduction, and economical effect of benefit

Inactive Publication Date: 2003-11-26
樊张帆 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The discarded calcium carbide slag has strong alkalinity, which causes environmental pollution
At present, in the existing technology, the production of calcium carbide mainly uses lime and coke as raw materials for production. Therefore, the production of calcium carbide requires a large amount of limestone to be burned to burn lime, resulting in vegetation damage and soil erosion. damage to the ecological environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] Embodiment of the present invention: when using calcium carbide waste slag to prepare high-calcium carbon, the carbide slag is mixed with the crushed ordinary carbonaceous raw material to obtain a mixture, and the weight percentage of calcium carbide dry slag and carbonaceous raw material in the mixture is controlled at 30% to 70%: the range of 70% to 30%, and the sum of the weight percentage of calcium carbide slag and carbonaceous raw materials is 100%. Ordinary carbonaceous raw materials can be raw coal or other carbonaceous raw materials with ash content less than 15%. , the mixture can be granulated or not granulated, and the mixture is sent to the kiln equipment for roasting at a temperature of 853-1273K. The heat required for the roasting is mainly composed of the volatile matter and the carbonaceous raw materials in the mixture. A small amount of fixed carbon is provided by combustion. After the mixture is roasted at a temperature of 853-1273K for 20-50 minutes, ...

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PUM

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Abstract

Carbide slag and crushed common carbon material are mixed to obtain mixed material, and the mixture is roasted in furnace at 853-1273 deg.c for 20-50 min to obtain high calcium-carbon mixture with calcium oxide and fixed carbon as main components. The high calcium-carbon mixture is used as main material to produce calcium carbide product through reaction in electric furnace at 2121 K. The high calcium-carbon mixture is controlled to have a calcium oxide / carbon weight ratio of 61 to 39 through adding lime or coke. The present invention utilizes waste in producing calcium carbide product andhas the advantages of reducing environmental pollution, etc.

Description

Technical field: [0001] The invention relates to a method for preparing high-calcium carbon by using calcium carbide waste slag and producing calcium carbide, belonging to the technical field of calcium carbide production. Background technique: [0002] The main component of calcium carbide is CaC 2 , is an important chemical raw material for the production of acetylene gas, and calcium carbide slag is a by-product of hydrolysis in the use of calcium carbide, the main component of which is calcium hydroxide Ca(OH) 2 It accounts for about 95% of the calcium carbide dry slag. It is estimated that the calcium carbide dry slag produced by the use of calcium carbide in my country is more than 3 million tons per year. Among them, the calcium carbide slag produced by the production of polyvinyl chloride by the calcium carbide acetylene method is about 1.6 million tons per year. Due to reasons such as recycling technology and cost, Except some carbide slags are used for cement prod...

Claims

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Application Information

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IPC IPC(8): B09B3/00C01B32/942
Inventor 樊张帆樊囿宇
Owner 樊张帆
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