Tungsten tailings general-purpose Portland cement and preparation method thereof

Abstract

The invention provides tungsten tailings general-purpose Portland cement. The general-purpose Portland cement is prepared from the following raw materials in percentage by weight: 53.00 to 85.00 percent of cement clinker, 0 to 2.50 percent of phosphogypsum, 1.50 to 7.50 percent of desulfurized gypsum, 4.00 to 15.00 percent of limestone, 0 to 1.80 percent of high siliceous sandstone, 1.50 to 7.50 percent of furnace bottom slag, 0 to 10.00 percent of coal ash and 0.50 to 32.50 percent of active ultrafine powder, wherein the active ultrafine powder is mixed powder which is formed by mixing and grinding tungsten tailings and high-magnesium limestone. The invention further discloses a preparation method of the general-purpose Portland cement. The mixed powder of the tungsten tailings and high-magnesium limestone is added in the general-purpose Portland cement, so the flowability and the strength of the cement are enhanced, the utilization rate of the tungsten tailings and the high-magnesiumlimestone is increased, and harm to the environment is relieved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a general-purpose Portland cement for tungsten tailings and a preparation method thereof. Background technique [0002] As the six general-purpose cements, Portland cement has been widely used in industrial and civil buildings, and its performance is superior to that of ordinary Portland cement in many aspects. The cement mixed with various active mixed materials can reduce the production cost of cement, and has strength advantages and excellent physical and mechanical properties compared with cement mixed with a single mixed material. Industrial waste residues such as fly ash are widely used in concrete, cement and other fields as mixed materials. However, in recent years, the supply of industrial waste residues such as fly ash has been in short supply, and the quality is difficult to meet the demand. [0003] Tungsten tailings are tungsten ores that are ground and then discha...

AI Technical Summary

Problems solved by technology

[0006] One of the objectives of the present invention is to address the above problems, to provide a general-purpose Portland cement for tungsten tailings, adding active ultrafine powder prepared by mixing and grinding tungsten tailings and high-magnesium limestone, so as to solve the problem of workability of tungsten tailings. Bad problems, and improve the activity of tungsten tailings, enhance the fluidity and strength of cement, while improving the utilization rate of tungsten tailings and high magnesium limestone and alleviate the harm to the environment

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