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Micro-expansion high-belite sulphoaluminate cement and production method thereof

A special sulfoaluminate and micro-expansion technology, applied in cement production and other directions, can solve the problems of affecting production cost and quality, cracking of manufactured components, and high damage rate, so as to protect the ecological environment, improve quality, and improve The effect of technical indicators

Inactive Publication Date: 2021-03-09
ZHENGZHOU JIANWEN SPECIAL MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional sulphoaluminate cement also generally suffers from slow early setting, low strength, easy cracking, efflorescence, and many cracking phenomena in the finished components and high damage rate, which directly affects the production cost and quality in application.

Method used

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  • Micro-expansion high-belite sulphoaluminate cement and production method thereof
  • Micro-expansion high-belite sulphoaluminate cement and production method thereof
  • Micro-expansion high-belite sulphoaluminate cement and production method thereof

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Experimental program
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Effect test

preparation example Construction

[0040] ① Preparation of raw meal: according to the ratio of raw meal in Table 2, weigh limestone, anhydrite, and low-grade bauxite whose chemical composition is shown in Table 1, and put them into the raw meal mill for grinding in proportion, and then enter the raw meal The material mill tail lifter enters the homogenization tank, and after homogenization, the kiln raw material is obtained.

[0041] In this step, the granularity of limestone, anhydrite, and low-grade bauxite and the good grindability of low-grade bauxite greatly increase the unit-hour output of the raw meal grinding system, and greatly reduce power consumption and ball consumption. and lining wear.

[0042] The chemical composition of table 1 raw material

[0043] The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present inv...

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Abstract

The invention relates to micro-expansion high-belite sulphoaluminate cement and a production method thereof. The cement comprises 28-40% of C4A3S, 20-35% of C2S, 10-20% of f-SO3, 5-10% of f-CaO and 4-7% of C4AF, and comprises the following chemical components: 10-13% of SiO2, 12-25% of Al2O3, 1.1-6% of Fe2O3, 50-60% of CaO and 16-20% of SO3. The clinker rate value range Cm is 1.4-2.0, the clinkerrate value range P is 1-2, the clinker is prepared by calcining 40-60% by mass of limestone, 20-40% by mass of low-grade bauxite and 10-30% by mass of anhydrite in a rotary kiln at the temperature of1300 + / -50 DEG C, and 50-80% by mass of the clinker, 10-25% by mass of anhydrite and 10-30% by mass of limestone are mixed and ground into the micro-expansion high belite sulphoaluminate cement.

Description

technical field [0001] The invention belongs to the field of building materials and relates to the improvement of the industrial production technology of micro-expansion high belite sulfoaluminate cement. Specifically, it is a new kind of micro-expansion high belite sulfoaluminate cement and its production method. Background technique [0002] The mineral composition and production method of traditional sulphoaluminate cement, especially the raw material requirements are very strict. The raw materials used should minimize the content of ferric oxide, sulfide, and other oxides. 2 o 3 The content requirement of the content is greater than or equal to more than 60%, and the high-quality raw materials suitable for production are less and less, and the price is more and more expensive, forming a contradiction between supply and demand. The consumption of raw materials per ton of cement clinker is high, and the calcination temperature is 1500-1550°C, which has a background of h...

Claims

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Application Information

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IPC IPC(8): C04B7/32C04B7/36C04B7/38C04B7/44C04B7/48C04B7/52
CPCC04B7/323C04B7/36C04B7/38C04B7/44C04B7/48C04B7/52Y02P40/10
Inventor 李豪张世杰张学文刘小芬张进卫
Owner ZHENGZHOU JIANWEN SPECIAL MATERIAL TECH
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