A kind of retarded clinker and preparation method thereof

A clinker, retarding technology, applied in the field of cement, can solve the problems of fast heat release, short initial setting time, short cement setting time, etc., to achieve the effect of quality assurance

Active Publication Date: 2022-07-01
兰溪南方水泥有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The initial setting time of ordinary silicate produced by silicate clinker is as short as 85-95 minutes, and the setting time of cement produced with its clinker is short, generally about 170-190 minutes. At the same time, the heat of hydration is high and the heat release rate is high Fast, not suitable for mass concrete works, road works

Method used

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  • A kind of retarded clinker and preparation method thereof
  • A kind of retarded clinker and preparation method thereof
  • A kind of retarded clinker and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] A retarded clinker, the corresponding raw meal is composed of the following components in mass fractions (that is, mass percentages):

[0092] Limestone, 85%;

[0093] Clay, 10%;

[0094] Non-ferrous metal slag, 2.5%;

[0095] Fluorite tailings, 2.5%.

[0096] Among them, the fluorite tailings are the waste fluorite tailings beneficiation powder produced by Jinshi Resources Group Zhejiang Zijing Mining Co., Ltd. during the processing of fluorite ore. The specific quality is as follows (by mass percentage), and some constant components are not listed. :

[0097] Fluorite tailings quality

[0098]

[0099] The specific quality of other components is as follows (in mass percentage), and some constant components are not listed:

[0100]

[0101] The specific quality of the clinker is as follows (in terms of mass percentage), and some constant components are not listed, wherein the amount of pulverized coal added is 2.8% of the quality of the clinker:

[0102] ...

Embodiment 2

[0112] Example 2 The influence of the addition amount of fluorite tailings on the retarding time of clinker

[0113] A retarded clinker, the corresponding raw meal is composed of the following components in mass fractions (that is, mass percentages):

[0114] Limestone, 84.7%;

[0115] Clay, 9.8%;

[0116] Non-ferrous metal slag, 2.5%;

[0117] Fluorite tailings, 3.0%.

[0118] Among them, the specific quality of fluorite tailings is as follows (in mass percentage), and some constant components are not listed:

[0119] Fluorite tailings quality

[0120]

[0121] The specific quality of other components is as follows (in mass percentage), and some constant components are not listed:

[0122]

[0123]

[0124] The preparation method of the above-mentioned retarded clinker is based on Example 1, and some conditions are modified. The modification content is: the decomposition temperature in the decomposition furnace in step (5) is 890 ° C, the firing temperature in t...

Embodiment 3

[0125] Example 3 Effect of fluorite tailings addition on clinker retardation time

[0126] A retarded clinker, the corresponding raw meal is composed of the following components in mass fractions (that is, mass percentages):

[0127] Limestone, 89.2%;

[0128] Clay, 5.0%;

[0129] Non-ferrous metal slag, 3.6%;

[0130] Fluorite tailings, 2.2%.

[0131] Among them, the specific quality of fluorite tailings is as follows (in mass percentage), and some constant components are not listed:

[0132] Fluorite tailings quality

[0133]

[0134] The specific quality of other components is as follows (in mass percentage), and some constant components are not listed:

[0135]

[0136] The preparation method of the above-mentioned retarded clinker is based on the modification of some conditions on the basis of Example 1, and the modification content is: the decomposition temperature in the decomposition furnace of step (5) is 880 ° C, and the firing temperature in the rotary kiln...

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Abstract

The invention belongs to the field of cement, and particularly relates to a retarded clinker and a preparation method thereof. The raw material of the slow-setting clinker of the present invention is composed of the following components in mass fractions: limestone, 81.0-93.0%; clay, 3.0-15.0%; non-ferrous metal ash, 1.0-5.0%; fluorite tailings, 1.5‑3.5%. Wherein, the content of calcium fluoride in the fluorite tailings is 15-30%. By adding a certain amount of fluorite tailings, the invention prolongs the initial setting and final setting time of the clinker, and realizes the production of the retarded clinker, thereby meeting the performance requirements of the retarded cement for special projects; The performance is still maintained, so it can ensure the quality of concrete while meeting the requirements for the retarding characteristics of cement; at the same time, the effective use of fluorite tailings broadens the utilization of fluorite tailings, and reduces the stacking and external discharge of waste-producing enterprises. Meet the needs of green environmental protection.

Description

technical field [0001] The invention belongs to the field of cement, and particularly relates to a retarded clinker and a preparation method thereof. Background technique [0002] Due to the long process time of the road construction process, the initial setting time of the cement is required to be long according to the construction requirements, and the construction season is usually in spring and summer. It brings difficulties to the construction or affects the construction quality of the base, so the concrete is required to have a long working time, so to prolong the setting time of the cement, it is necessary to adjust the setting time of the clinker. [0003] At present, the initial setting time of ordinary silicate clinker is about 85-95 minutes, and the setting time of cement produced with its clinker is short, generally about 170-190 minutes. Fast, not suitable for mass concrete engineering, road engineering. Therefore, it is necessary to delay the setting time by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/24C10L5/00C10L9/10
CPCC04B7/24C10L5/00C10L9/10Y02P40/10
Inventor 楼美善楼凯翔孙诗华邢愚戴建盛赵云峰
Owner 兰溪南方水泥有限公司
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