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A kind of preparation method of sulfate corrosion resistant cement

A technology of anti-sulfate and Portland cement, applied in cement production and other directions, can solve problems that have not yet been seen, and achieve the effects of improving anti-sulfate corrosion resistance, solving stacking pollution, and reducing production costs.

Active Publication Date: 2015-08-05
GANSU HENGYA CEMENT COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Utilizing the special properties of stainless steel slag, it can be applied to sulfate corrosion-resistant cement. At present, some studies have shown that Portland cement with slag added has better sulfate corrosion resistance than ordinary Portland cement, but it has not yet been seen. The technology of using stainless steel slag instead of slag to produce sulfate corrosion-resistant cement realizes energy saving and emission reduction, and turns waste into treasure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of preparation method of sulfate corrosion-resistant cement of the present invention, comprises the following steps:

[0018] (1) The following components are calculated according to parts by weight: 20% stainless steel slag and 80% type II Portland cement; the particle size of the stainless steel slag is 1mm, and the water content is 15%; the selected stainless steel slag The gelling activity is higher than 25%.

[0019] (2) Use the raw material grinding device to roughly grind the stainless steel slag to a fineness of 0.2mm, add the coarsely ground stainless steel slag and Type II Portland cement to the reactor, mix them evenly and carry out cement curing at 1300°C Calcining the material for 1.0h to obtain Portland cement clinker for subsequent use;

[0020] (3) The following components are calculated in parts by weight: Portland cement clinker: 60 parts, phosphogypsum: 3 parts, other admixtures: 0.5 parts; the mass ratio of other admixtures is 1: 1:2 mixture...

Embodiment 2

[0023] A kind of preparation method of sulfate corrosion-resistant cement of the present invention, comprises the following steps:

[0024] (1) The following components are calculated according to weight parts: 25% stainless steel slag and 75% type II portland cement; the particle size of the stainless steel slag is 3mm, and the water content is 20%; the selected stainless steel slag The gelling activity is higher than 25%.

[0025] (2) Use the raw material grinding device to roughly grind the stainless steel slag to a fineness of 0.3mm, add the coarsely ground stainless steel slag and type II Portland cement to the reactor, mix them evenly and carry out cement curing at 1350°C Calcining the material for 0.8h to obtain Portland cement clinker for subsequent use;

[0026] (3) The following components are calculated in parts by weight: Portland cement clinker: 70 parts, phosphogypsum: 6 parts, other admixtures: 4 parts; the mass ratio of other admixtures is 1: 1:2 mixture of c...

Embodiment 3

[0029] A kind of preparation method of sulfate corrosion-resistant cement of the present invention, comprises the following steps:

[0030] (1) The following components are calculated according to weight parts: 30% stainless steel slag and 70% type II portland cement; the particle size of the stainless steel slag is 5mm, and the water content is 25%; the selected stainless steel slag The gelling activity is higher than 25%.

[0031] (2) Use the raw material grinding device to roughly grind the stainless steel slag to a fineness of 0.5mm, add the coarsely ground stainless steel slag and Type II Portland cement to the reactor, mix them evenly and carry out cement curing at 1400°C Calcining the material for 0.5h to obtain Portland cement clinker for subsequent use;

[0032] (3) The following components are calculated in parts by weight: Portland cement clinker: 90 parts, phosphogypsum: 8 parts, other admixtures: 10 parts; the mass ratio of other admixtures is 1: 1:2 mixture of ...

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Abstract

The invention discloses a preparation method of sulfate corrosion resistance cement, which comprises the steps of adding waste, namely stainless steel slag, resulting in heavier and heavier loads and produced by the steel industry to ordinary portland cement, roasting into portland cement clinker at the superhigh temperature, treating solid waste residue, namely phosphogypsum, produced by treating phosphorite with sulfuric acid during phosphoric acid production to a certain extent, and then replacing ordinary gypsum with the phosphogypsum to fabricate the sulfate corrosion resistance cement together with the portland cement clinker. On the one hand, the problems of environment pollution and appropriation of land due to waste stacking are solved. On the other hand, the waste is recycled, the cement production cost is lowered, the sulfate corrosion resistance of the sulfate corrosion resistance cement finish product is effectively improved; and application prospects of environmental, social and economic benefits are realized.

Description

technical field [0001] The invention relates to the field of construction industry, in particular to a preparation method of sulfate corrosion-resistant cement. Background technique [0002] With the continuous rapid growth of domestic steel production, a large amount of metallurgical slag is increasing, which puts more and more pressure on steel enterprises to deal with it, and also brings a huge load to the environment. How to use steel slag and turn waste into treasure is an urgent problem that we need to solve. Utilizing the special properties of stainless steel slag, it can be applied to sulfate corrosion-resistant cement. At present, some studies have shown that Portland cement with slag added has better sulfate corrosion resistance than ordinary Portland cement, but it has not yet been seen. The technology of using stainless steel slag instead of slag for the production of sulfate-resistant cement realizes energy saving and emission reduction, and turns waste into wea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/153
CPCY02P40/10
Inventor 周建平
Owner GANSU HENGYA CEMENT COMPANY