Process for dry coke quenching and coke desulfurating by coke oven gas

Abstract

A process for using coke oven gas to extinguish coke and desulfurize coke features that the coke oven gas is circulated in the coke extingushing furnace, the heat-absorbing cracking reaction of methane in gas and the high heat transfer efficiency of gas can effectively extinguish to coke, and the H2 in gas can react on the sulfide and organosulfur in coke to generate H2S, so desulfurizing coke.

Description

technical field [0001] The invention relates to a low-sulfur coke production technology and a coke dry quenching technology. The invention belongs to the field of coal chemical industry and metallurgy. Background technique [0002] The largest user of coke is the ironmaking industry. The sulfur content in coke significantly affects the energy consumption of blast furnace ironmaking and the quality of molten iron. For every 0.1% increase in sulfur in coke, the coke ratio needs to increase by 1.5%, while the production capacity of the blast furnace decreases by 2.5%. Most of the sulfur in the coke eventually enters the molten iron, and the molten iron with high sulfur content increases the cost and time of the pretreatment of the molten iron. [0003] China is the world's largest producer of coke. Over the past ten years, my country's total coke production has more than doubled. In recent years, the world's coke production is about 360 million tons per year, one-third of w...

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Problems solved by technology

However, these studies and patented technologies are not aimed at coke desulfurization, nor can they solve the problem of coke desulfurization, because the aforementioned coal hydropyrolysis process generally uses a fluidized bed with hydrogen-rich gas as a carrier gas to heat and pyrolyze pulverized coal , the hydropyrolysis temperature generally does not exceed 700°C, the product obtained is low-sulfur granular semi-coke, and block coke cannot be obtained, while coking is that coal is heated to about 1000°C in a fixed bed in isolation from air, and the product is block coke

So far, there are no research reports and patented technologies on coke desulfurization in the world

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