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Cement produced from electrolytic manganese residues and production method thereof

A technology of electrolytic manganese slag and production method, which is applied in the direction of cement production, etc., can solve the problems that enterprises are difficult to rationally use electrolytic manganese slag, and achieve the effects of stabilizing heavy metals, reducing hydration speed, and improving strength

Active Publication Date: 2021-11-05
广西凭祥市恒宇水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of electrolytic manganese slag added is so small that it is difficult for enterprises to rationally utilize electrolytic manganese slag by building their own cement plants

Method used

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  • Cement produced from electrolytic manganese residues and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A cement produced by using electrolytic manganese slag, made of the following raw materials in parts by weight: cement clinker 85, electrolytic manganese slag 12, fly ash 7 and gypsum 1.5; the cement clinker is made of the following raw materials by weight Manufacture: limestone 82, clay 3, river sand 3 and iron ore 2; cement clinker is prepared by the conventional method in this industry, and the calcination temperature is 1450°C.

[0026] In the electrolytic manganese slag, Fe 2 o 3 The content of MnO is 23.5%, and the content of MnO is 16.7%. The electrolytic manganese slag is used after the following treatment: add quicklime after the electrolytic manganese slag is pulverized, wherein the amount of quicklime is 7.3% of the weight of the electrolytic manganese slag, stir and mix to remove ammonia nitrogen, and obtain the pretreated electrolytic manganese slag; Spray the treatment agent into the pretreated electrolytic manganese slag while stirring. The temperature ...

Embodiment 2

[0034] A cement produced by using electrolytic manganese slag, made of the following raw materials in parts by weight: cement clinker 80, electrolytic manganese slag 10, fly ash 5 and gypsum 1; the cement clinker is made of the following raw materials by weight Crafted from: Limestone 80, Clay 2, River Sand 2, and Iron Ore 1.

[0035] In the electrolytic manganese slag, Fe 2 o 3 The content of MnO is 24.0%, and the content of MnO is 17.2%. The electrolytic manganese slag is used after the following treatment: the electrolytic manganese slag is pulverized and then added with quicklime, wherein the amount of quicklime added is 7% of the weight of the electrolytic manganese slag, stirred and mixed to remove ammonia nitrogen, and the pretreated electrolytic manganese slag is obtained; Spray the treatment agent into the pretreated electrolytic manganese slag while stirring. The temperature during the treatment process is controlled at 40°C, the stirring speed is 50r / min, and the ...

Embodiment 3

[0040] A cement produced by utilizing electrolytic manganese slag, made of the following raw materials by weight: cement clinker 90, electrolytic manganese slag 15, fly ash 8 and gypsum 2; the cement clinker is made of the following raw materials by weight Crafted from: Limestone 85, Clay 6, River Sand 5, and Iron Ore 3.

[0041] In the electrolytic manganese slag, Fe 2 o 3 The content of MnO is 22.8%, and the content of MnO is 15.9%. The electrolytic manganese slag is used after the following treatment: add quicklime after crushing the electrolytic manganese slag, wherein the amount of quicklime is 8% of the weight of the electrolytic manganese slag, stir and mix to remove ammonia nitrogen, and obtain the pretreated electrolytic manganese slag; Spray the treatment agent into the pretreated electrolytic manganese slag while stirring. The temperature during the treatment process is controlled at 60°C, the stirring speed is 60r / min, and the treatment time is 30min. 4 、K 2 CO...

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Abstract

The invention discloses cement produced from electrolytic manganese residues and a production method thereof, and belongs to the technical field of cement production. The cement is prepared from the following raw materials in parts by weight: 80-90 parts of cement clinker, 10-15 parts of electrolytic manganese residues, 5-8 parts of fly ash and 1-2 parts of gypsum. The cement clinker is prepared from the following raw materials in parts by weight: 80-85 parts of limestone, 2-6 parts of clay, 2-5 parts of river sand and 1-3 parts of iron ore. The electrolytic manganese residues are used for replacing part of gypsum to be added into the cement, the usage amount of the gypsum can be effectively reduced, and meanwhile the strength of a cement finished product can be improved; the produced cement co-treats the electrolytic manganese residues, and slag resources can be effectively recycled.

Description

technical field [0001] The invention belongs to the technical field of cement production, and in particular relates to cement produced by electrolytic manganese slag and a production method thereof. Background technique [0002] my country is the world's largest producer, consumer and exporter of electrolytic manganese metal, with a production capacity of more than 2 million tons, accounting for 98% of the world's total production capacity of electrolytic manganese. Electrolytic manganese slag is the filtered acid slag produced after electrolysis of metal manganese, and is a key pollutant in the electrolytic manganese industry. The annual output of electrolytic manganese slag is very large, accumulating more than 80 million tons over the years, and the stock is huge. At present, enterprises have not yet found a way to properly dispose of electrolytic manganese slag, and generally transport electrolytic manganese slag to the storage yard for damming. Domestic manganese slag...

Claims

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Application Information

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IPC IPC(8): C04B7/26C04B7/24C04B7/36C04B7/38
CPCC04B7/26C04B7/24C04B7/36C04B7/38Y02P40/10
Inventor 王建苏德根黄杰峰
Owner 广西凭祥市恒宇水泥有限公司
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