Blast furnace coal injection combustion improver and use method thereof

一种高炉喷煤助燃剂及其使用方法

Abstract

本发明属于冶金工业技术领域,公开了一种高炉喷煤助燃剂及其使用方法。所述助燃剂由活性铝质量分数不小于95%的铝粉构成;所述助燃剂的使用方法是阻燃剂的用量为原煤质量分数的0.065%~0.10%。本发明采用铝粉为高炉喷煤助燃剂,与原煤混合制粉后喷入高炉燃烧,加快煤粉的氧气扩散速度,促进高炉喷煤煤粉的大分子裂解,实现降低煤粉着火点和加快高炉风口前煤粉燃烧效率的目的,使助燃剂使用成本由传统稀土类约5.13~6.17元/吨铁,降低至本发明的3.23~2.07元/吨铁,具有不含碱金属、助燃效果稳定、使用安全可靠、能有效提高高炉煤比和降低焦比、增加产量、配加成本低,从而有效提升高炉喷煤综合经济效益的特点。
The invention belongs to the technical field of metallurgical industry and discloses a blast furnace coal injection combustion improver and a use method thereof. The blast furnace coal injection combustion improver comprises aluminum powder with activated aluminum being not less than 95wt%. According to the use method of the blast furnace coal injection combustion improver, the usage amount of a fire retardant accounts for 0.065%-0.10wt% of raw coal. According to the invention, the aluminum powder is adopted as the blast furnace coal injection combustion improver, the aluminum powder is mixed with the raw coal to prepare powder and then the powder is injected into a blast furnace for combustion to accelerate the oxygen diffusion velocity of coal powder and promote the macromolecule cracking of blast furnace coal injection coal powder, so that the purposes of lowering a coal powder ignition point and increasing the combustion efficiency of the coal powder positioned in front of a blast-furnace tuyere are reached, and the usage cost of the combustion improver disclosed by the invention is reduced to 3.23-2.07 yuan/ton of iron from about 5.13-6.17 yuan/ton of iron of the traditional rare earth combustion improver; the blast furnace coal injection combustion improver disclosed by the invention has the characteristics of no alkali metal, stable combustion-supporting effect and safe and reliable use and can effectively enhance the coal ratio of the blast furnace, reduce the coke ratio, increase the output and lower the addition cost, thus effectively increasing the integral economic benefit of blast furnace coal injection.

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Patent Citations (3)

    Publication numberPublication dateAssigneeTitle
    CN-102199466-ASeptember 28, 2011江苏锋泰建材科技有限公司Coal-saving combustion-supporting additive
    CN-103018127-AApril 03, 2013武钢集团昆明钢铁股份有限公司测定煤粉添加剂助燃性的方法
    CN-103451333-ADecember 18, 2013武钢集团昆明钢铁股份有限公司一种高炉喷煤助燃剂及其制备方法与应用

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