A Technological Method for Increasing Blast Furnace Coke Supply

Abstract

The present invention relates to a process method for increasing coke supply of blast furnace, comprising the following steps: (1) counting the coke pushing current and coke line data in the coke oven production process, and establishing a benchmark for process improvement; (2) analyzing the particle size of different incoming coals Class distribution, so that the amount of coal with a particle size below 0.5mm is kept within 10%; (3) Change the connection mode of the pulverizer hammer head, the number of pulverizer hammer heads, the length of the hammer handle and the distance between the counterattack plates in the coal preparation process ; (4) Sampling and testing from the pulverizer according to the specifications, respectively recording the fineness of the incoming coal, the corresponding coke pushing current and the coke line data, comparing them with the benchmark data in step (1), and selecting the coke pushing The fineness of the furnace coal with a current below 210A; (5) configure according to the above improved parameters, and solidify the production process; this process method optimizes the particle size distribution of the furnace coal by adjusting the key equipment in the coal preparation area, and significantly improves the coke Under the premise of improving the quality, the production of coke has been greatly increased.

Description

technical field [0001] The invention relates to the technical field of steelmaking technology, in particular to a process method for increasing coke supply of blast furnaces. Background technique [0002] Coke is an indispensable raw material in the production process of blast furnace ironmaking. It mainly plays the roles of skeleton, carbon supply, reduction and heat supply, and plays a vital role in the normal production of blast furnace. At present, coke production mainly distributes, mixes, and pulverizes a single type of coal reasonably through the coal preparation process, and then sends it to the coking chamber of the coke oven for high-temperature coking. After the coke produced by the coke oven is screened and tested, the qualified coke will be sent to the blast furnace as raw material for production. [0003] As a heating furnace built with a large amount of refractory materials, the coke oven has a short service life and is extremely difficult to maintain and rep...

AI Technical Summary

Problems solved by technology

Therefore, after the coke oven has been put into production for a period of time, its actual production capacity often cannot reach the designed capacity, resulting in the shortage of raw materials for the supporting blast furnace, and the shortage of resources, difficulty in transportation, and high price of purchased coke.

[0004] For example, in many existing manufacturers, due to problems such as poor maintenance in the early stage, the condition of the coke oven has deteriorated to a large extent, resulting in a sharp drop in the production capacity of the coke oven, which has seriously affected the coke supply of the blast furnace.

In order to ensure the production of the blast furnace, coke is often urgently purchased from the market to ensure the supply. The cost of purchased coke is about 500 yuan higher than that of self-produced coke, resulting in a large waste of funds