Method for producing high-iron low-calcium clinker

A production method and clinker technology, applied in cement production, etc., can solve the problems of pollution, high investment and operating costs, land occupation by non-ferrous metal ash, etc., and achieve easy production control, no large lumps, and low heat of hydration Effect

Pending Publication Date: 2019-12-13
GUANGXI YUFENG CEMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Non-ferrous metal ash is a kind of industrial waste generated in the process of metal smelting. At present, the pyrolysis method, slag beneficiation method and wet method are generally used in China to extract valuable metals in non-ferrous metal ash. The investment and operation costs are relatively high. High, the added value of the products obtained is low, and the process produces certain pollution; while the land occupied by unused non-ferrous metal ash will also cause the loss of metal resources and environmental pollution, so it is necessary to explore a Low cost non-ferrous metal ash utilization way

Method used

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  • Method for producing high-iron low-calcium clinker

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A production method of high-iron and low-calcium clinker, comprising the following steps:

[0035] (1) Raw material grinding: take 78% limestone, 16% sandstone, 5.5% non-ferrous metal ash, 0.5% made of CaF 2 , CuO, P 2 o 5 and Zn according to the weight percentage of the composite additive composed of 4:2:1:1, add water, carry out co-grinding, make the raw material slurry, stir in the mixing tank, obtain the kiln slurry with a moisture content of 35%;

[0036] (2) material cake preparation: the material cake with a moisture content of 19% is formed after the material slurry entering the kiln is dehydrated by a vacuum suction filter;

[0037](3) Material cake crushing: send the material cake to the drying crusher through the conveying equipment, and use the 570-580 ℃ hot exhaust gas drawn from the kiln tail to crush it into raw meal powder with a moisture content of 2%, raw meal powder Fineness 0.08mm sieve allowance is 26%;

[0038] (4) Clinker calcination: feed the...

Embodiment 2

[0041] A production method of high-iron and low-calcium clinker, comprising the following steps:

[0042] (1) Raw material grinding: take 83% limestone, 12% sandstone, 4.2% non-ferrous metal ash, 0.8% made of CaF 2 , CuO, P 2 o 5 and Zn according to the weight percentage is 4:2:1:1 composite additive, add water, carry out co-grinding, make raw material slurry, stir in large tank, obtain the kiln slurry with moisture content of 34%;

[0043] (2) material cake preparation: the material cake with a moisture content of 19% is formed after the material slurry entering the kiln is dehydrated by a vacuum suction filter;

[0044] (3) Material cake crushing: send the material cake to the drying crusher through the conveying equipment, and use the 570-580 ℃ hot exhaust gas drawn from the kiln tail to crush it into raw meal powder with a moisture content of 2%, raw meal powder Fineness 0.08mm sieve allowance is 27%;

[0045] (4) Clinker calcination: feed the raw meal powder into the ...

Embodiment 3

[0048] A production method of high-iron and low-calcium clinker, comprising the following steps:

[0049] (1) Raw material grinding: take 79.7% limestone, 14% sandstone, 6% non-ferrous metal ash, 0.3% made of CaF 2 , CuO, P 2 o 5 and Zn according to the weight percentage is 3:2:1:1 composite additive, add water, carry out co-grinding, make raw material slurry, stir in large tank, obtain the kiln slurry with moisture content of 33%;

[0050] (2) material cake preparation: the material cake with moisture content of 18% is formed after the material slurry entering the kiln is dehydrated by a vacuum suction filter;

[0051] (3) Material cake crushing: Send the material cake to the drying crusher through the conveying equipment, and use the 570-580 ℃ hot exhaust gas drawn from the kiln tail to crush it into raw meal powder with a moisture content of 1%, raw meal powder Fineness 0.08mm sieve allowance is 28%;

[0052] (4) Clinker calcination: Feed the raw meal powder into the cy...

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Abstract

The invention discloses a method for producing high-iron low-calcium clinker and belongs to the technical field of building materials. The method comprises the following steps: by taking 78-83% of limestone, 12-16% of sandstone, 3-6% of nonferrous metal ash and 0.3-0.8% of a composite additive consisting of CaF2, CuO, P2O5 and Zn as raw materials, performing powdering, preparing cakes, crushing the cakes, further performing calcining so as to obtain clinker, and finally cooling and crushing the clinker, so as to obtain the high-iron low-calcium clinker. The method is low in raw material cost,and the prepared high-iron low-calcium clinker is high in strength, low in hydration heat and applicable to engineering or parts with special requirements.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a production method of high-iron and low-calcium clinker. Background technique [0002] Ocean engineering is subject to external forces such as waves and tides, as well as multi-field coupling in complex environments such as dry-wet cycles, salt, high temperature / freeze-thaw, and its cement-based materials are prone to premature degradation. In recent years, scholars at home and abroad have studied C 4 The research on AF is getting deeper and deeper, and it is found that it has good corrosion resistance and abrasion resistance. By adjusting the temperature, alkalinity and firing system, it can effectively improve the hydration speed and degree of hydration of the iron phase of cement clinker. Increase the stability of its hydration products and improve early strength. Iron-phase hydration produces highly corrosion-resistant calcium ferrite hydrate and iro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/22C04B7/147C04B7/36C04B7/42C04B7/44
CPCC04B7/22C04B7/147C04B7/36C04B7/425C04B7/44Y02P40/10
Inventor 杨义蒋杉平黄小青邓玉莲覃金英杨茂鑫刘骥潘国文巫裕旋李少成朱运锋黄丽霖廖双双古巧燕
Owner GUANGXI YUFENG CEMENT
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