提升制粉系统产能的技术优化及改造实践

Technical optimization and transformation practice for improving the production capacity of powder making systems

2022年9月16日以前,重钢炼铁厂只有三套煤粉制备系统,总制粉能力为180 t/h。2020年底,重钢在完成所有高炉大修后恢复四座高炉满负荷生产,总的煤粉需求量达到了210 t/h,当时的制粉能力已无法匹配高炉煤粉需求。同期,由于焦炭资源紧张且成本较高,提高制粉能力满足高炉煤粉需求已成为当时提高喷煤比、缓解焦炭资源紧张及降低炼铁成本的重要途径。本文主要以重庆钢铁炼铁厂的煤粉制备系统现状为例,介绍了如何通过技术优化及设备改造来提升煤粉制备系统制粉能力满足高炉所需煤粉量。文中从原材料质量提升、设备工况改进、生产操作优化等多方面详细阐述了多项举措,为同行在如何解决制粉能力不足、提升制粉系统制粉量、保障高炉煤粉稳定供应提供了指导性思路。

Before September 16,2022,Chongqing Iron and Steel Plant only had three sets of coal powder preparation systems,with a total powder production capacity of 180 t/h.At the end of 2020,Chongqing Iron and Stel resumed full load production of four blast furnaces after completing all major repairs,with a total coal powder demand of 210 t/h.At that time,the coal powder production capacity could no longer match the coal powder demand of the blast furnace.During the same period,due to the scarcity and high cost of coke resources,improving the powder produc-tion capacity to meet the demand for blast furnace coal powder had become an important way to increase the coal in-jection ratio,alleviate the shortage of coke resources,and reduce ironmaking costs.This article mainly takes the current situation of the coal powder preparation system at Chongqing Iron and Steel Iron and Steel Plant as an exam-ple,and introduces how to improve the coal powder production capacity of the coal powder preparation system through technical optimization and equipment transformation to meet the coal powder demand of the blast furnace.The article elaborates on multiple measures from various aspects such as improving the quality of raw materials,improving equipment working conditions,and optimizing production operations,providing guidance for peers on how to solve the insufficient powder production capacity,increase the powder production volume of the powder pro-duction system,and ensure the stable supply of blast furnace coal powder.