Iron-making system of hydrogen-rich and carbon-rich circulating blast furnace

Abstract

The invention discloses an iron-making system of a hydrogen-carbon-rich circulating blast furnace, which comprises a hydrogen-carbon-rich circulating blast furnace, the hydrogen-carbon-rich circulating blast furnace is used for iron-making to obtain molten iron and generate slag and blast furnace top gas; the dust removal device is respectively communicated with a blast furnace top gas outlet of the hydrogen-rich carbon circulating blast furnace, the top gas circulating CO2 carbon removal device and the heating device; pure oxygen with the oxygen content of 100%, heated high-temperature coke oven gas and high-temperature decarburized gas are sprayed into the hydrogen-rich carbon circulating blast furnace, ore and coke are added to the furnace top, furnace top gas is introduced into a decarburization device, CO2 in the furnace top gas is removed through an alcohol amine method, high-temperature gas is formed, and the high-temperature gas is sprayed into the hydrogen-rich carbon circulating blast furnace; the ironmaking system comprises a hydrogen-carbon-rich circulating blast furnace and a furnace top gas circulating decarburization and heating injection system, an oxygen tuyere and a composite tuyere device for injecting gas are annularly arranged on a hearth of the hydrogen-carbon-rich circulating blast furnace, and a furnace body heating gas inlet is formed in the middle lower part of a blast furnace body.

Description

technical field [0001] The invention belongs to the field of low-carbon metallurgy, and in particular relates to an ironmaking system of a hydrogen-rich carbon circulation blast furnace. Background technique [0002] The iron and steel industry consumes a lot of resources and emits a lot of greenhouse gases. Among them, the energy consumption and CO2 emissions of the traditional blast furnace ironmaking system composed of sintering pellets, coking, blast furnace and hot blast stove account for 69% and 73% of the iron and steel industry respectively. . At present, the traditional blast furnace ironmaking technology has reached the extreme in terms of production efficiency and energy utilization, and it is difficult to achieve substantial energy saving and emission reduction in blast furnace ironmaking only by improving operation methods. In view of the increasing awareness of global environmental protection and the increasing depletion of resources, the existing blast furnac...

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Problems solved by technology

[0003]The purpose of the present invention is to propose a hydrogen-rich carbon cycle blast furnace ironmaking system, which can effectively solve the problem of full oxygen blast furnace top gas cycle by setting and using gas cycle heating Insufficient quantity, and then greatly reduce the coke ratio and coal ratio, reduce the demand for fossil fuels, and reduce CO2 emissions per ton of iron

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