Production process of special low-carbon steel slag cement

A technology of steel slag and cement, which is applied in the direction of cement production, etc., can solve the problems of occupying farmland land, large fluctuations in chemical composition, high hardness, etc., and achieve the effect of reducing CO2 emissions

Inactive Publication Date: 2011-05-25
赵明友
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Problems solved by technology

Steel slag has not been well utilized because of its low activity, high hardness, difficulty in crushing, difficulty in grinding, large fluctuations in chemical com...

Method used

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  • Production process of special low-carbon steel slag cement

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Embodiment Construction

[0010] The hardness of steel slag is relatively high, with a Mohs hardness of 6-7, and slag steel particles are wrapped in the slag. Therefore, crushing and grinding are relatively difficult, and the particle size of steel slag directly affects the output and grinding fineness of steel slag cement. Three crushing and three magnetic separations are used in production, plus a closed-circuit pre-grinding system. After being processed by this system, the particle size and metal content of the steel slag are greatly reduced, the burden on the mill is relieved, the grinding time is shortened, the output and quality of the cement mill are improved, and the energy consumption is reduced. The steel slag is individually ground to a fineness that meets the process requirements, and stored in the finished product warehouse.

[0011] Granulated blast furnace slag is a glassy substance that is mostly formed when the molten slag of blast furnace ironmaking is quenched, and it is too late to ...

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Abstract

The invention relates to a production process of special low-carbon steel slag cement. The special low-carbon slag cement uses steel slag, mineral slag and portland cement clinker as main raw materials. Because the steel slag has low activity, large hardness, crushing difficulty and lower utilization rate further lower than the mineral slag, by adopting new processes of three-time crushing, three-time magnetic separation, closed-path pre-grinding and independent material grinding, the production process reduces the grinding particle size and the metal content of the steel slag, excites the activity of the steel slag to overcome the defects of low early-stage strength and long setting time of the steel slag cement, thereby stably producing 425 steel slag cement for a long term, wherein the 425 steel slag cement is used for various industrial and civil large-size buildings.

Description

1. Technical field [0001] Industrial waste residue treatment technology in the field of cement manufacturing technology. 2. Background technology [0002] Steel slag is the solid waste slag discharged during the steelmaking process, and about 100 million tons are discharged nationwide every year. Steel slag has not been well utilized because of its low activity, high hardness, difficulty in crushing, difficulty in grinding, large fluctuations in chemical composition, and poor stability. A large number of scrap steel slags not only occupy farmland, but also cause serious pollution to the environment around the slag yard. How to use these steel scrap slags to reduce environmental pollution has always been a research topic for engineers and technicians in the iron and steel industry and the cement industry. More than 30 years ago, Professor Sun Shushan invented a new process of using steel slag to produce steel slag cement. Steel slag and Portland cement clinker have similar...

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Application Information

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IPC IPC(8): C04B7/21
CPCY02P40/10
Inventor 赵明友
Owner 赵明友
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