Determining method of reasonable oxygen enrichment rate of blast furnace

Abstract

The invention relates to a determining method of the reasonable oxygen enrichment rate of a blast furnace. The determining method is characterized in that aiming at the blast furnace with the effective furnace volume of 450-6,000 m<3> applying an oxygen enrichment process, in the daily production process, the blast volume, the spray-blow coal ratio, the volatile matter content of spray-blow mixedcoal powder, the grain size of the spray-blow mixed coal powder, the iron content of raw materials in the furnace, and the hot reactivity of coke in the furnace are taken as reference data to determine the reasonable oxygen enrichment rate of blasted hot air in the blast furnace. According to the operation indexes of the blast furnace in different stages, the mathematic correlation between the operation indexes and the oxygen enrichment rate of the blast furnace is built to determine the reasonable oxygen enrichment rate of the blasted hot air in the blast furnace, thus, stable operation of the blast furnace is achieved while production of the blast furnace is enhanced, and meanwhile, the effects of reducing fuel consumption and the production cost of iron making can be further achieved.

Description

technical field [0001] The invention relates to the technical field of ironmaking in the iron and steel industry, in particular to a method for determining a reasonable oxygen enrichment rate of a blast furnace. Background technique [0002] Due to the country's increasingly stringent requirements for environmental protection, coupled with the constraints of metallurgical industry regulation and other factors, for now, iron and steel enterprises will not be able to add new process equipment, but at the same time, with the rapid development of my country's economy, for different purposes The demand for steel products is also increasing day by day. In order to meet the rapid growth of steel products in different industries, these steel companies need to make use of existing equipment conditions and fully tap their own capabilities to cope with the growing market demand. As far as the ironmaking process is concerned, the increase in production capacity means that its own product...

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Problems solved by technology

But what must be emphasized here is that although there are many discussions in such literature, there is still no clear statement on the determination of the oxygen enrichment rate in actual production. Therefore, in terms of the actual blast furnace oxygen enrichment technology, different operations have not been realized The determination of the reasonable oxygen enrichment rate of the blast furnace under the index, so as to achieve the optimal production effect of the blast furnace

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