Retarding clinker and preparation method thereof

A clinker and retarding technology, applied in the field of cement, can solve the problems of fast heat release, short cement setting time and high hydration heat, and achieve the effect of ensuring quality

Active Publication Date: 2021-02-09
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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  • Retarding clinker and preparation method thereof
  • Retarding clinker and preparation method thereof
  • Retarding clinker and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] A kind of retarded clinker, its corresponding raw meal is made up of each component of following mass fraction (being mass percent):

[0092] Limestone, 85%;

[0093] Clay, 10%;

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

[0095] Fluorite tailings, 2.5%.

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

[0097] The quality of fluorite tailings

[0098]

[0099] The concrete mass situation of other each component is as follows (by mass percentage), and some constant components are not listed:

[0100]

[0101] The concrete quality situation of described clinker is as follows (by mass percentage), and part constant component is not listed, and wherein, the pulverized coal mixing amount is 2.8% of clinke...

Embodiment 2

[0112] Embodiment 2 The impact of fluorite tailings addition on clinker retarding time

[0113] A kind of retarded clinker, its corresponding raw meal is made up of each component of following mass fraction (being mass percent):

[0114] Limestone, 84.7%;

[0115] Clay, 9.8%;

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

[0117] Fluorite tailings, 3.0%.

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

[0119] The quality of fluorite tailings

[0120]

[0121] The concrete mass situation of other each component is as follows (by mass percentage), and some constant components are not listed:

[0122]

[0123]

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

Embodiment 3

[0125] Embodiment 3 The influence of fluorite tailings addition amount on clinker retarding time

[0126] A kind of retarded clinker, its corresponding raw meal is made up of each component of following mass fraction (being mass percent):

[0127] Limestone, 89.2%;

[0128] Clay, 5.0%;

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

[0130] Fluorite tailings, 2.2%.

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

[0132] The quality of fluorite tailings

[0133]

[0134] The concrete mass situation of other each component is as follows (by 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. The modified content is: the decomposition temperature in the decomposition furnace of step (5) is 880 ° C, and the firing tempera...

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Abstract

The invention belongs to the field of cement, and particularly relates to a retarding clinker and a preparation method thereof. The retarding clinker comprises the following raw materials in percentage by mass: 81.0-93.0% of limestone, 3.0-15% of clay, 1.0-5.0% of non-ferrous metal ash residues, and 1.5-3.5% of fluorite tailings, wherein the content of calcium fluoride in the fluorite tailings is15-30%. By adding a certain amount of fluorite tailings, the initial setting time and the final setting time of the clinker are prolonged, and the production of the delayed coagulation clinker is realized, so the requirements of special engineering on the performance of retarding cement can be met; in addition, the mechanical property of the clinker is still maintained, so concrete quality can beensured while the requirements on cement retarding characteristics are met; and meanwhile, the fluorite tailings are effectively utilized, the utilization way of the fluorite tailings is broadened, stacking and external emission of waste production enterprises are reduced, and the demands of environmental protection are met.

Description

technical field [0001] The invention belongs to the field of cement, and in particular relates to a slow-setting 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, when the temperature is high, the water evaporates rapidly, the cement hydration speed is accelerated, and the concrete quickly loses fluidity, which will cause It brings difficulties to the construction or affects the construction quality of the base, so the concrete is required to have a longer working time, so the setting time of the clinker needs to be adjusted to prolong the setting time of the cement. [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 ...

Claims

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Application Information

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Patent Type & Authority Applications(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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