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Portland cement clinker and preparation method thereof

A Portland cement and clinker technology, applied in cement production and other directions, can solve the problems of large stacking volume, occupying large land, polluting the environment, etc., and achieve the effect of saving costs and resources

Inactive Publication Date: 2020-09-11
张延年
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two kinds of waste residues have accumulated a large amount over the years, occupying a large amount of land and seriously polluting the environment

Method used

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  • Portland cement clinker and preparation method thereof
  • Portland cement clinker and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A Portland cement clinker, comprising 52% limestone, 26% coal gangue, 12% iron tailings, 7% fly ash, 1.5% fluorogypsum, 1.5% calcium fluoride, prepared according to the following method:

[0034] (1) Break the raw materials separately, and control the particle size of the incoming abrasive to be less than 15mm;

[0035] (2) The raw materials are evenly mixed in proportion, and then ground, and the final particle size greater than 0.08mm does not exceed 10% of the total weight;

[0036] (3) Add the raw materials pulverized in step (2) into a rotary kiln for calcination, the calcination temperature is 1400°C, and the calcination time is 40 minutes;

[0037] (4) Cool the raw materials calcined in step (3) to room temperature to obtain Portland cement clinker.

Embodiment 2

[0039] A Portland cement clinker, comprising 55% limestone, 25% coal gangue, 10% iron tailings, 7.5% fly ash, 1.5% fluorogypsum, 1% calcium fluoride, prepared according to the following method:

[0040] (1) Break the raw materials separately, and control the particle size of the incoming abrasive to be less than 15mm;

[0041] (2) The raw materials are evenly mixed in proportion, and then ground, and the final particle size greater than 0.08mm does not exceed 10% of the total weight;

[0042] (3) Add the raw materials pulverized in step (2) into a rotary kiln for calcination, the calcination temperature is 1400°C, and the calcination time is 45 minutes;

[0043] (4) Cool the raw materials calcined in step (3) to room temperature to obtain Portland cement clinker.

Embodiment 3

[0045] A Portland cement clinker, comprising 58% limestone, 23% coal gangue, 11% iron tailings, 5% fly ash, 1.8% fluorogypsum, 1.2% calcium fluoride, prepared according to the following method:

[0046] (1) Break the raw materials separately, and control the particle size of the incoming abrasive to be less than 15mm;

[0047] (2) The raw materials are evenly mixed in proportion, and then ground, and the final particle size greater than 0.08mm does not exceed 10% of the total weight;

[0048] (3) Add the raw materials pulverized in step (2) into a rotary kiln for calcination, the calcination temperature is 1400°C, and the calcination time is 50 minutes;

[0049] (4) Cool the raw materials calcined in step (3) to room temperature to obtain Portland cement clinker.

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Abstract

The invention discloses Portland cement clinker and a preparation method thereof, and belongs to the field of building material preparation. The Portland cement clinker comprises the following components by weight percentage: 52%-58% of limestone, 23%-26% of coal gangue, 8%-12% of iron tailings, 5%-10% of fly ash, 1.2%-1.8% of fluorgypsum and 0.8%-1.2% of calcium fluoride. Limestone is used as a calcareous raw material, coal gangue is used as a silicon-aluminum raw material, iron tailings and fly ash are used as correction materials, fluorgypsum and calcium chloride are used as a mineralizer,a large amount of solid waste can be consumed to produce the Portland cement clinker, and the mineralizer is introduced at the same time to improve the burnability of raw materials and improve the quality and yield of the clinker. According to the method, waste can be turned into wealth, accumulation of a large amount of solid waste is effectively reduced, the raw material supply problem is relieved, and meanwhile the cost is saved.

Description

technical field [0001] The invention relates to a Portland cement clinker and a preparation method thereof, belonging to the field of building material preparation. Background technique [0002] Iron tailings is a composite mineral material with complex components, the main chemical components are silicon dioxide, aluminum oxide, iron oxide, calcium oxide and manganese oxide, etc., and a small amount of potassium oxide, sodium oxide, sulfur trioxide And phosphorus pentoxide, which can replace traditional raw materials to prepare building materials. [0003] Iron tailings, as the solid waste after ore beneficiation, are one of the bulk industrial solid wastes. As of 2019, my country has accumulatively stockpiled more than 60 billion tons of tailings, and it is estimated that an additional 1.6 billion tons will be generated each year, while the overall utilization rate is less than 20%. Stacking will seriously damage the surrounding ecological environment, and even desertific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/36
CPCC04B7/26C04B7/36Y02P40/10
Inventor 张延年李志军顾晓薇陈志燕杜松岩董宁李琦琦陈昊刘柏男张文洁崔长青王亭张于于康楠王铁源闫明程于洋
Owner 张延年
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