Method for preparing electrolytic manganese slag ecological cement

A technology of electrolytic manganese slag and ecological cement, which is applied in the fields of building materials and environmental protection, can solve problems such as ecological damage and environmental pollution, and achieve the effects of reducing serious damage, good environmental and economic benefits, and high product quality

Inactive Publication Date: 2011-01-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing ecological cement by using electrolytic manganese slag in a large amount. Environmental pollution and ecological damage caused by environmental pollution, and at the same time realize the large-scale resource utilization of electrolytic manganese slag

Method used

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  • Method for preparing electrolytic manganese slag ecological cement
  • Method for preparing electrolytic manganese slag ecological cement
  • Method for preparing electrolytic manganese slag ecological cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A composition and preparation method of electrolytic manganese slag ecological cement, the method preparation steps are:

[0017] (1) First crush the electrolytic manganese slag into 1-10mm fragments with a crusher, and then calcinate at 700°C;

[0018] (2) Mix 30% blast furnace slag and 20% clinker and grind to a specific surface area of ​​420m 2 / kg, and then mixed with crushed and calcined electrolytic manganese slag 35%, fly ash 9%, gypsum 5% and additive 1%, the final mixture should be ground to a specific surface area of ​​510m 2 / kg.

[0019] (3) Finally, after the various powders obtained in step (2) are tested, they can be used as ecological cement products. The properties that can be achieved by testing the strength and stability of the material according to the GB175-2007 standard are shown in Table 1.

[0020] The basic properties of the product obtained in Table 1 Example 1

[0021]

Embodiment 2

[0023] A composition and preparation method of electrolytic manganese slag ecological cement, the method preparation steps are:

[0024] (1) First crush the electrolytic manganese slag into 1-10mm fragments with a crusher, and then calcinate at 800°C;

[0025] (2) Mix 40% of blast furnace slag and 10% of clinker and grind until the specific surface area is 410m 2 / kg, and then mixed with crushed and calcined electrolytic manganese slag 40%, fly ash 5%, gypsum 4% and additive 1%, the final mixture should be ground to a specific surface area of ​​510m 2 / kg.

[0026] (3) Finally, after the various powders obtained in step (2) are tested, they can be used as ecological cement products. The properties that can be achieved by testing the strength and stability of the material according to the GB175-2007 standard are shown in Table 2.

[0027] Gained product basic performance in the embodiment 2 of table 2

[0028]

Embodiment 3

[0030] A composition and preparation method of electrolytic manganese slag ecological cement, the method preparation steps are:

[0031] (1) First crush the electrolytic manganese slag into 1-10mm fragments with a crusher, and then calcinate at 750°C;

[0032] (2) Mix and grind 35% of crushed and calcined electrolytic manganese slag, 30% of blast furnace slag, 15% of clinker, 15% of steel slag, 3% of gypsum and 2% of additive, and the final mixture is ground to a specific surface area of ​​480m 2 / kg.

[0033] (3) Finally, the mixture obtained in step (2) can be used as an ecological cement product after inspection. The performance of the material that can be tested for strength and stability according to the GB175-2007 standard is shown in Table 3.

[0034] The basic properties of the product obtained in Table 3 Example 3

[0035]

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Abstract

The invention discloses a method for preparing electrolytic manganese slag ecological cement, and belongs to the field of building materials and environment protection. The cement is characterized by consisting of calcined electrolytic manganese slag, blast furnace slag, a clinker, gypsum and an additive. The method comprises the following steps of: crushing the electrolytic manganese slag and then calcining the crushed slag at the temperature of between 500 and 900 DEG C, wherein the activity of the slag is increased to be close to that of fly ash from zero activity of volcanic ash; and grinding the blast furnace slag, the clinker, the fly ash or steel slag, the gypsum and the additive together or respectively according to a certain proportion and uniformly mixing the materials to prepare the electrolytic manganese slag ecological cement, wherein the amount of the calcined electrolytic manganese slag in the mixture is 10 to 50 percent. The method has the advantages of circularly utilizing a great amount of accumulated electrolytic manganese slag on a large scale and relieving serious damage of the electrolytic manganese slag to the environment, along with simple process, high product quality, low production cost and high economic, environmental and social benefit.

Description

technical field [0001] The invention relates to a method for preparing ecological cement by using electrolytic manganese slag as the main raw material. It belongs to the fields of building materials and environmental protection. Background technique [0002] Manganese is an important foundation and strategic material of the national economy, and is widely used in high-tech fields such as steel and non-ferrous metal smelting, electronic batteries, aerospace, and national defense industries. Manganese products mainly include electrolytic manganese metal, manganese dioxide, trimanganese tetraoxide, and manganese sulfate. Among them, electrolytic manganese is the most widely used and the output is also the largest. At present, my country is the largest producer, consumer and exporter of electrolytic manganese in the world. In 2008, the actual output of electrolytic manganese enterprises in my country was 1.139 million tons, accounting for 97.4% of the world. It is estimated t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/21
CPCY02P40/10
Inventor 刘晓明李宇张玲玲苍大强宗燕兵杨志杰
Owner UNIV OF SCI & TECH BEIJING
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