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Overview of solid waste utilization in China's steel industry

Author: Tianjin Daegu Zhuang Xinhong Pipe Source: diseinugile.com Hits: Updated: November 21, 2019 [Font: large, medium and small ]

Tags: price of spiral steel pipe Tianjin spiral tube factory Daqiuzhuang spiral tube thick wall spiral welded pipe

The iron and steel industry is a typical resource and energy-intensive industry. Daqiuzhuang spiral tubes. Steel production requires a large amount of iron ore, coal, new water and other resources. Daqiuzhuang spiral tubes generate a lot of "three wastes" resources. According to statistics, for each ton of crude steel produced by Daqiuzhuang Spiral Pipe, long-process iron and steel enterprises consume about 0.7 to 0.8 tons of coal, 1.5 to 1.55 tons of iron ore, Daguizhuang Spiral Pipe, and a large amount of raw materials such as limestone flux. Daegu Zhuang spiral tube, about 600 kg per ton of steel solid waste. According to the different interfaces, Daguozhuang spiral tubes, solid waste mainly include blast furnace slag, steel slag, iron-containing dust sludge, environmental dust sludge, waste refractory materials, self-provided fly ash and desulfurized gypsum. According to preliminary estimates, Daqiuzhuang spiral pipe produces 500 million tons of solid waste in the iron and steel industry each year. Since the "Thirteenth Five-Year Plan" period, with the increase in output of pig iron and crude steel, Daguozhuang spiral tubes, large industrial solid waste such as spiral tubes, blast furnace slag and steel slag have also shown an increase. According to calculations, Daqiuzhuang spiral tube, the national blast furnace slag increased from 251 million tons in 2015 to 270 million tons in 2018, Daqiuzhuang spiral tube, an average annual growth of 3.7%; steel slag increased from 104 million tons in 2015 to 114 million tons in 2018 , Daqiuzhuang spiral tube, with an average annual increase of 4.7%.
At present, the production and utilization of solid waste in the iron and steel industry in Daqiuzhuang spiral tubes are mainly characterized by the following features:
One is the large amount of solid waste generated. China's iron and steel industry solid waste production accounts for about 15% of the country's industrial solid waste. Daqiuzhuang spiral pipe, if the iron ore tailings and waste rock of mining enterprises, Daguizhuang spiral pipe, its proportion is higher. At the same time, Daguizhuang spiral tube, China's steel production is mainly based on the blast furnace-converter long process. As of the end of 2018, Daqiuzhuang spiral tube, China's long-flow crude steel production accounted for nearly 90%, Daqiuzhuang spiral tube, The amount of solid waste produced per ton of steel is higher than the short-flow process of electric furnaces.
Second, there are many types of solid waste, and the Daeguzhuang spiral tube has complex components. Affected by the steel production process and steel type, Daqiuzhuang spiral tubes have different compositions of iron-containing dust and mud produced in different processes. Daqiuzhuang spiral tubes have different steel compositions for smelting different steel types.
The third is the pressure on standardized disposal and resource utilization. There are many iron and steel enterprises, and the concentration is not high. Daqiuzhuang spiral tubes. It is difficult for a single enterprise to use small-scale solid wastes on a large scale and economically.
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