Coking method for increasing consumption of weak binding coal and reducing production energy consumption

Abstract

The invention provides a coking method for increasing the consumption of weak binding coal and reducing production energy consumption. The coking method comprises the following steps: (1) charging blended coal from the coal charging hole of a carbonization chamber, assembling a furnace door, and introducing coal gas and air into a combustion chamber, wherein the coal gas is mixed coal gas of cokeoven coal gas and blast furnace coal gas; (2) transferring heat generated by the combustion of the coal gas and the air to the blended coal in the carbonization chamber through a furnace wall betweenthe combustion chamber and the carbonization chamber; and (3) when the center temperature of the blended coal in the carbonization chamber reaches 1050 DEG C, and smoldering for 1.7-2 hours to obtaincoke, wherein preferably the heat conductivity coefficient of the furnace wall in the step (2) is 2.25-2.55 W / m.K. By utilizing the method, the consumption of weak bonding coal can be effectively increased, the quality of coke is not degraded, the risk of coking coal resource shortage caused by reduction of high-quality coking coal resources can be effectively relieved, and the coke oven yield ina coking process can be effectively increased.

Description

technical field [0001] The invention belongs to the technical field of the use of production coal in the coking production process and the optimization control of the coking production operation process, and in particular relates to a coking method for increasing the usage of weak caking coal and reducing production energy consumption. Background technique [0002] With the expansion of iron-making production capacity, especially at present, my country's steel production capacity has exceeded 800 million tons, and the process of iron-making is mainly to use coke and sinter for reduction reaction to obtain molten iron. Correspondingly, the production capacity of coke that provides raw materials for ironmaking has also been rapidly expanded. In order to produce more coke, many companies will produce coke ovens at full capacity and even some coke ovens will be overloaded. The main raw material for coke production is coking coal. my country has abundant coal resources, and in th...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to solve the huge consumption of coke currently used in ironmaking, but the resource content of weakly caking coal in my country's coking coal resources is huge, and the resource content of strongly caking coal is insufficient. Renewable coking coal resources are gradually depleted, and a coking method that increases the use of weakly caking coal and reduces production energy consumption is proposed. By adjusting the excess coefficient of heating gas and air in the combustion chamber and improving the thermal conductivity of the furnace wall, the carbonization can be changed. The temperature gradient of indoor coking coal ensures the formation of colloids and the full reaction process, so as to increase the use of weakly caking coal in blended coal, ensure that the quality of coke does not deteriorate, and effectively alleviate the reduction of high-quality coking coal resources. At the same time, it can effectively increase the coke oven output in the coking process, reduce the coking time in the coking production process, reduce the energy consumption in the coking production process, thereby reducing the production cost in the coking production process and improving the economic benefits of the enterprise