Calcined clinker prepared by replacing part of clay with municipal solid waste incineration bottom slag and preparation method of calcined clinker

A technology of municipal solid waste and bottom slag incineration, which is applied in the cement field to achieve the effect of realizing resource recycling, reducing stacking and external discharge, and broadening utilization channels

Pending Publication Date: 2022-02-01
兰溪南方水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Substituting part of the clay-calcined cement clinker with municipal solid waste incineration bottom slag has not been reported in the literature. Based on this, the present invention proposes to replace part of clay-calcined cement clinker with municipal solid waste incineration bottom slag, which can improve the burnability of raw meal , reduce the coal consumption of clinker calcination, reduce the production cost, and also open up a new way for the comprehensive utilization of municipal solid waste incineration bottom slag resources

Method used

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  • Calcined clinker prepared by replacing part of clay with municipal solid waste incineration bottom slag and preparation method of calcined clinker
  • Calcined clinker prepared by replacing part of clay with municipal solid waste incineration bottom slag and preparation method of calcined clinker
  • Calcined clinker prepared by replacing part of clay with municipal solid waste incineration bottom slag and preparation method of calcined clinker

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preparation example Construction

[0150] The present invention also provides a method for preparing the above municipal solid waste incineration bottom slag replacing part of the clay calcined cement clinker, the method comprising the following steps:

[0151] (1) Raw material crushing: crush large pieces of limestone and clay separately, and the particle size of the material below 30mm should not be less than 85%. After the crushed limestone and clay are mixed with municipal solid waste incineration bottom slag and non-ferrous metal ash, etc., they will pass through the conveying equipment. Transport to respective homogenization warehouses for storage and homogenization; further, the conveying equipment is conventional equipment, such as a belt conveyor;

[0152](2) Raw meal batching: limestone, clay, municipal solid waste incineration bottom slag, and non-ferrous metal ash are batched according to the composition of the above-mentioned raw material mass fractions (ie mass percentages) through metering equipme...

Embodiment 1

[0171] A kind of cement clinker is calcined by substituting part of the clay with the incineration bottom slag of municipal solid waste. What is used is to prepare the raw meal by replacing part of the clay with the bottom slag of the municipal solid waste incineration and then calcining to obtain the cement clinker. The raw meal corresponding to the clinker is as follows Each component of mass fraction (i.e. mass percentage):

[0172] Limestone: 89.0%,

[0173] Clay: 6.2%,

[0174] Municipal solid waste incineration bottom slag: 1.5%,

[0175] Non-ferrous metal ash: 3.3%,

[0176] The concrete mass situation of each component is as follows (by mass percentage), and some trace components are not listed:

[0177]

[0178] The concrete quality situation of described clinker is as follows (by mass percentage), and part trace component is not listed, and wherein, the pulverized coal mixing amount is 9.54% of raw meal quality:

[0179]

[0180] The clinker quality control...

Embodiment 2

[0193] A kind of substituting part of the clay-calcined cement clinker with municipal solid waste incineration bottom slag, what adopt is to replace part of the clay-calcined cement clinker with municipal solid waste incineration bottom slag, wherein, the corresponding raw material of clinker is composed of the following mass fraction (i.e. mass The composition of each component of percentage):

[0194] Limestone: 88.8%,

[0195] Clay: 5.7%,

[0196] Municipal solid waste incineration bottom slag: 2.0%,

[0197] Non-ferrous metal ash: 3.5%,

[0198] The concrete mass situation of each component is as follows (by mass percentage), and some trace components are not listed:

[0199]

[0200] The specific quality of the clinker is as follows (by mass percentage), and some trace components are not listed. Wherein, the amount of coal added is 9.54% of the mass of the raw material:

[0201]

[0202]

[0203] The clinker quality control index values ​​are: KH: 1.040±0.02,...

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Abstract

The invention belongs to the field of cement, and particularly relates to a calcined cement clinker prepared by replacing part of clay with municipal solid waste incineration bottom slag and a preparation method of the calcined cement clinker. The raw material of the cement clinker is prepared by replacing part of clay with municipal solid waste incineration bottom slag, and the raw material of the cement clinker comprises the following components in percentage by mass: 87.0-92.0% of limestone, 3.0-6.5% of clay, 1.0-4.0% of municipal solid waste incineration bottom slag and 2.0-5.0% of non-ferrous metal ash. According to the clinker ingredients, the production cost of the clinker is effectively reduced, the use of clay resources can be reduced, a new path is opened up for comprehensive utilization of municipal solid waste incineration bottom slag resources, meanwhile, the quality of the cement clinker is kept unchanged, and the production requirements are met.

Description

technical field [0001] The invention belongs to the field of cement, and in particular relates to a kind of cement clinker calcined with municipal solid waste incineration bottom slag to replace part of clay and a preparation method thereof. Background technique [0002] Since the cement industry is a resource-based enterprise, with the increasing shortage of resources, the high-quality raw materials that can meet the needs of production and use are tight, and the cost of raw materials continues to rise. [0003] At present, the siliceous raw material clay used for cement clinker is affected by land, environmental protection and other factors, and the clay resources that can be exploited and utilized are becoming less and less. Municipal solid waste incineration bottom slag is waste residue generated during waste incineration in waste power plants. According to statistics, 120,000 tons of municipal solid waste incineration bottom slag will be produced every year in the count...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/28C04B7/36
CPCC04B7/28C04B7/36Y02P40/10
Inventor 楼美善张学彦楼凯翔龚贞赵云峰
Owner 兰溪南方水泥有限公司
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