A method for blast furnace injection of biomass hydrothermal charcoal

Abstract

The invention belongs to the technical field of blast furnace ironmaking, and particularly discloses a method for carrying out blast furnace blowing on biomass hydrothermal carbon. The method solves the problem that an optimal utilization method of biomass resources in blast furnace blowing process. The method can also be used for heat treatment of waste plastics, waste rubbers and other municipalcombustible solid waste water to prepare the hydrothermal carbon and the method can be efficiently applied to determination of a blast furnace blowing scheme. Under the condition that the influencesof biomass hydrothermal carbonization treatment, biomass hydrothermal carbon powder preparing, conveying and blowing on blast furnace smelting key process parameters are considered, the optimal utilization method for carrying out blast furnace blowing on biomass hydrothermal carbon is formed. According to the method, the system is analyzed by aiming at different biomass hydrothermal carbon, important assessment index of the blast furnace smelting downstream behavior is adopted, and the safe and efficient blast furnace blowing on the biomass hydrothermal carbon is realized, so that the comprehensive utilization efficiency of biomass resources is improved, and the emission of CO2 produced by the ironmaking is reduced.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and in particular relates to a method for injecting biomass hydrothermal charcoal into a blast furnace. Background technique [0002] Coal is a non-renewable resource, and its mining and use will pollute the environment. The mining and utilization of a large amount of coal resources has already had an adverse impact on my country's environment, resources, sustainable economic and social development. In order to promote the construction of ecological civilization and green development, the country has carried out macro-control at the policy level, from the control of new coal production capacity, the closure of outdated production capacity, to the control of total coal consumption, the development of clean and efficient use of coal, and other aspects to comprehensively promote the construction of ecological civilization and ECO development. As a large coal consumer, iron and stee...

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Problems solved by technology

[0009] (1) The fiber content in biomass is high, and there are problems of high power consumption, low efficiency and high cost during mechanical crushing, and the fiber aspect ratio in biomass powder is high, and the gas-solid transportation performance is poor, and it is easy to block pipelines and Distributor, the biomass cannot be pulverized, transported and sprayed into the blast furnace using the existing equipment of the ironworks;

[0010] (2) The content of moisture and volatile matter in biomass is high, the calorific value is low, and the effect of replacing coke during blast furnace injection is poor. At the same time, the theoretical combustion temperature of the tuyere will decrease and the amount of bosh gas will increase, which will have a negative impact on the normal production of the blast furnace. ;

[0011] (3) The method of preparing biomass coke by pyrolysis of biomass and blast furnace injection can solve the problems of low calorific value and difficulty in making powder, but the pyrolysis process will cause the enrichment of alkali metals, which will reduce the content of alkali metals in biomass coke Much higher than that of pulverized coal, when the blast furnace is injected in large quantities, the amount of alkali metal brought in by the fuel will increase, causing the ore and coke in the blast furnace to deteriorate further, affecting the normal production of the blast furnace

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