Method for preparing Portland cement

Abstract

The invention discloses a method for preparing Portland cement. The method comprises the following steps: 1) preparing the raw materials: taking 85-90 parts of Portland cement clinker, 2-5 parts of dry powder calcium carbide slag, 3-6 parts of gypsum, 4-6 parts of a grinding aid, 1-1.5 parts of iron oxide, and 3-5 parts of zeolite powder according to weight part; 2) mixing the raw materials and grinding the materials, blending the materials to the raw batch with appropriate component and uniform distribution through homogenizing; 3) calcining the raw batch in a cement kiln for partial melting, cooling the raw batch to obtain the clinker by taking calcium silicate as a main component; and 4) grinding the clinker, gypsum, and moderate mixing material to obtain the Portland cement. The preparation method fully use the waste calcium carbide slag, saves production cost, and improves the environment, and the produced Portland cement has the advantages of good mixcapacity and strong abrasion performance.

Description

technical field [0001] The invention belongs to the field of cement, in particular to a formula of Portland cement. Background technique [0002] In recent years, with the promulgation and implementation of national energy-saving and emission-reduction measures, various enterprises in my country's polyvinyl chloride industry have changed the traditional acetylene production process by hydrolysis of calcium carbide to dry acetylene generation process, and the discharged calcium carbide slag has a moisture content of 40% ~ 50% calcium carbide slag slurry becomes dry powder calcium carbide slag with a moisture content of 4% ~ 10%. How to comprehensively utilize this dry powder calcium carbide slag has become an urgent problem to be solved. At present, the country is in the research and development stage, and there is no mature technology and no Relevant technical standards are promulgated. Contents of the invention [0003] In view of the above-mentioned defects of the prior a...

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Problems solved by technology

[0002] In recent years, with the promulgation and implementation of national energy-saving and emission-reduction measures, various enterprises in my country's polyvinyl chloride industry have changed the traditional acetylene production process by hydrolysis of calcium carbide to dry acetylene generation process, and the discharged calcium carbide slag has a moisture content of 40% ~ 50% calcium carbide slag slurry becomes dry powder calcium carbide slag with a moisture content of 4% ~ 10%. How to comprehensively utilize this dry powder calcium carbide slag has become an urgent problem to be solved. At present, the country is in the research and development stage, and there is no mature technology and no Relevant technical standards issued