Preparation method of low heavy metal-leached ecological cement

A technology of ecological cement and low heavy metals, applied in cement production and other directions, can solve problems such as restricting the development of ecological cement, and achieve the effect of reducing production costs and secondary pollution.

Active Publication Date: 2013-12-18
湖北京兰水泥集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current production method of ecological cement is still in the exploratory stage for the control of heavy metals, which limits the use of ecological cement in places directly linked to human health, such as water supply pipes, and indirectly limits the development of the ecological cement industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of preparation method of low heavy metal leaching ecological cement of the present invention comprises the following steps:

[0018] (1) The following components are calculated according to weight parts: limestone: 10 parts, sludge: 5 parts, fly ash: 2 parts, aeolian sand: 5 parts, manganese ferromanganese slag: 5 parts, other external mixing Matter: 0.5 part; The other admixture is catalyst sodium sulfate; The aeolian sand is the aeolian sand with a water content of 2%; The particle size of the ferromanganese slag is 2mm, and the water content is 35%.

[0019] (2) Use a raw material grinding device to coarsely grind limestone and sludge to a fineness of 0.2mm, and grind ferromanganese slag to a fineness of 0.06mm and sieve less than 4% slag , the specific surface area of ​​mineral powder reaches 500m 2 / kg or more;

[0020] (3) A closed cycle system is adopted during production, and the coarsely ground material obtained in step (2) is sent into the raw materia...

Embodiment 2

[0022] A kind of preparation method of low heavy metal leaching ecological cement of the present invention comprises the following steps:

[0023] (1) The following components are calculated according to weight parts: limestone: 50 parts, sludge 30 parts, fly ash: 10 parts, aeolian sand: 20 parts, ferromanganese slag: 35 parts, and other admixtures 10 parts; the other admixtures are catalyst diboron trioxide; the aeolian sand is aeolian sand with a water content of 4%; the particle size of the ferromanganese slag is 4mm, and the water content is 45%.

[0024] (2) Use a raw material grinding device to coarsely grind limestone and sludge to a fineness of 0.5mm, and grind ferromanganese slag to a fineness of 0.06mm and sieve less than 4% slag , the specific surface area of ​​mineral powder reaches 500m 2 / kg or more;

[0025] (3) A closed cycle system is adopted during production, and the coarsely ground material obtained in step (2) is sent into the raw material bin, and the g...

Embodiment 3

[0027] A kind of preparation method of low heavy metal leaching ecological cement of the present invention comprises the following steps:

[0028] (1) The following components are calculated according to weight parts: limestone: 30 parts, sludge: 18 parts, fly ash: 6 parts, aeolian sand: 10 parts, ferromanganese slag: 26 parts, other external mixing Material: 3 parts; The other admixture is catalyst ferric oxide; The aeolian sand is the aeolian sand with a water content of 3%; The particle size of the ferromanganese slag is 3mm, and the water content is 40% .

[0029] (2) Use a raw material grinding device to coarsely grind limestone and sludge to a fineness of 0.3mm, and grind ferromanganese slag to a fineness of 0.06mm and sieve less than 4% slag , the specific surface area of ​​mineral powder reaches 500m 2 / kg or more;

[0030] (3) A closed circulation system is adopted during production, and the coarsely ground material obtained in step (2) is sent into the raw materia...

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PUM

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Abstract

The invention discloses a preparation method of low heavy metal-leached ecological cement. The method comprises the following steps: based on limestone, sludge, coal ash, aeolian sand, ferromanganese slag and a catalyst as raw materials, coarsely grinding the limestone and the sludge while carrying out pretreatment on the ferromanganese slag in a grinding manner, and then grinding with other components into required specific surface area after calcining at high temperature. On one hand, wastes such as the aeolian sand, the coal ash, the ferromanganese slag and the like are effectively utilized, and the problems of environmental pollution and land occupation caused by stacking of the wastes are solved; on the other hand, leaching of heavy metals is inhibited by cement solidification reaction of the sludge. Therefore, the secondary pollution is reduced; the wastes are recycled; the production cost of the cement is reduced; the application prospect integrated with environmental benefits, social benefits and economic benefits is achieved.

Description

technical field [0001] The invention relates to the field of construction industry, in particular to a preparation method of low heavy metal leaching ecological cement. Background technique [0002] With the further development of industry, the production and accumulation of industrial waste residues in my country have also increased sharply. The consumption of non-renewable resources and energy, and the massive discharge of waste gas and dust have caused serious impacts on the environment. Building an "ecological environment material-based" industry has become an important means for the sustainable development of the cement industry. Ecological cement is a new type of cement that came into being to adapt to this sustainable development trend. It is not only a better disposal method for solid waste such as industrial waste, but also a process of reusing waste, which not only reduces pollution , Protect the environment, and further improve the quality of cement products and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26
CPCY02P40/10
Inventor 周建平
Owner 湖北京兰水泥集团有限公司
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