Method for preparing briquetting furnace burden fro calcium carbide production from hydrated lime powder and coking coal powder

Abstract

The invention discloses a method for preparing briquetting furnace burden fro calcium carbide production from hydrated lime powder and coking coal powder. The method comprises: taking hydrated lime powder and coking coal powder as raw materials; determining the amount of the coking coal powder according to the fixed carbon content required by a calcium carbide smelting process and the fixed carbon content of the coking coal powder; determining the amount of the hydrated lime powder according to the CaO content required by the calcium carbide smelting process and the CaO content of hydrated lime; and adding water to the hydrated lime powder and the coking coal powder, mixing well, briquetting and drying the obtained product. Compared with conventional processes, the method has the advantages of reducing costs for raw materials by about 50 percent, improving the quality of calcium carbide products, reducing the power consumption per unit weight of calcium carbide and increasing daily output and production efficiency of submerged arc furnaces.

Description

technical field [0001] The invention relates to a production technology of briquette charge for calcium carbide production, in particular to a method for preparing briquette charge for calcium carbide production by mixing and briquetting slaked lime powder and coking coal powder. Background technique [0002] Calcium carbide is the raw material for the production of industrial acetylene, and it is widely used in the market. The current industrial method of producing calcium carbide is to mix a certain amount of quicklime (the active ingredient is CaO) and a certain amount of coke (the active ingredient is C) into the submerged arc furnace, and react at about 2000°C to form calcium carbide (the active ingredient is C). for CaC 2 ), the reaction equation is as follows: CaO+3C+110 kcal→CaC 2 +CO↑. This kind of process has the following disadvantages: 1. The price of coke is high, and a considerable amount of unusable coke debris will be produced when the coke is pulverized t...

AI Technical Summary

Problems solved by technology

This process has the following disadvantages: 1. The price of coke is high, and a considerable amount of unusable coke debris will be produced when the coke is pulverized to the required size, resulting in high raw material costs

2. The raw quicklime contains a large amount of non-CaO miscellaneous stones, which reduces the content of effective substances in the product calcium carbide, resulting in low utilization rate of the submerged arc furnace, increasing power consumption and cost