News Date:2015-11-07
Slag is the production of iron and steel smelting slag, chemical composition and clinker are similar, as a kind of industrial waste is abundant in our country.Slag with potential water hardness, the high fine and ultrafine grinding, specific surface area after reaching more than 400 ㎡ / kg, emerges the water hardness, can be used as a major component of cement.In response to the cement industry, the development of circular economy, energy conservation and emissions reduction slag through grinding is widely used in cement building materials.
In recent years, in both international and domestic markets, the rapid development of iron and steel industry in our country, the sharp expansion of steel production capacity.Slag black metallurgical industries affect the environment load is the main solid waste, according to the steel industry in 2008 to run basic situation analysis data, in 2008 I domestic crude steel 500.49 million tons, 470.67 million tons of pig iron, steel, 581.77 million tons of smelting slag produced 331 million tons, (about 143 million tons of steel slag, blast furnace slag is about 188 million tons), comprehensive utilization of 167 million tons, and accumulation, the total storage capacity of 380 million tons, covering an area of 60000 mu, these stocks stored in open air metallurgical slag encroach on land, soil, water and air pollution drug, serious impact on the ecological environment, apparent or potential economic loss and waste of resources.Is estimated to smelting slag stockpiling of economic loss of 12.5 yuan per ton, cause the economic loss of 4.75 billion yuan a year.Smelting, therefore, the recycling of the waste harmless, is the focus of our country and even the world attaches great importance to, and we promote one of the important content of circular economy.
Xinxiang Great Wall machinery is in such circumstances, independent research and development manufacturing in 2004 and launched the first slag vertical grinding machine.After ten years of continuous innovation and development and practice summary, current production of slag vertical mill has to catch up with the international level, in the past two years, has built more than 70 GGBS/steel slag powder production line, become the real flagship enterprise GGBS field.
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