Admixture for dry-process cement kiln clinker production

A dry-process cement and admixture technology, applied in the field of building material admixtures, can solve the problems of low steel slag utilization, environmental impact, imperfections, etc., and achieve the effects of saving coal consumption, increasing production, and accelerating firing speed

Active Publication Date: 2020-12-04
临沂德艺科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the imperfection of steel slag treatment technology, the utilization rate of steel slag is low, which not only occupies a large amount of cultivated land, but also has a certain impact on the environment

Method used

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  • Admixture for dry-process cement kiln clinker production
  • Admixture for dry-process cement kiln clinker production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An admixture for the production of clinker in a dry cement pit is composed of the following raw materials in parts by weight: 3% of rare earth, 40% of fluorite, 3% of nanometer metal powder, 48% of gypsum, 5% of modified steel slag powder, Glycerin 1%.

[0028] The water content of the rare earth is less than 2%.

[0029] Nano metal powder is nano titanium dioxide powder.

[0030] Modified steel slag powder is prepared by the following method:

[0031] 1) After cleaning the steel slag, dry it, grind it to obtain steel slag powder, add montmorillonite powder and starch, add water and stir evenly to obtain a mixed slurry, the amount of water added is twice the mass of the steel slag powder;

[0032] 2) Adding step (1) sodium sulfate solution with 0.1% mass of the mixed slurry and polyethylene glycol with 0.3% mass of the mixed slurry, mix evenly, and ball mill in a planetary ball mill for modification;

[0033] 3) After fully drying the modified slurry, press it into t...

Embodiment 2

[0037] An admixture for the production of clinker in a dry cement pit is composed of the following raw materials in parts by weight: 7% of rare earth, 30% of fluorite, 7% of nanometer metal powder, 45% of gypsum, 8% of modified steel slag powder, Glycerin 3%.

[0038] The water content of the rare earth is less than 2%.

[0039] Nano metal powder is nano titanium dioxide powder.

[0040] Modified steel slag powder is prepared by the following method:

[0041] 1) After cleaning the steel slag, dry it, grind it to obtain steel slag powder, add montmorillonite powder and starch, add water and stir evenly to obtain a mixed slurry, the amount of water added is twice the mass of the steel slag powder;

[0042] 2) Adding step (1) sodium sulfate solution with 0.3% mass of the mixed slurry and polyethylene glycol with 0.5% mass of the mixed slurry, mix evenly, and ball mill in a planetary ball mill for modification;

[0043] 3) After fully drying the modified slurry, press it into t...

Embodiment 3

[0047] An admixture for the production of clinker in a dry cement pit is composed of the following raw materials in parts by weight: 10% of rare earth, 20% of fluorite, 10% of nanometer metal powder, 50% of gypsum, 10% of modified steel slag powder, Glycerin 5%.

[0048] The water content of the rare earth is less than 2%.

[0049] Nano metal powder is nano titanium dioxide powder.

[0050] Modified steel slag powder is prepared by the following method:

[0051] 1) After cleaning the steel slag, dry it, grind it to obtain steel slag powder, add montmorillonite powder and starch, add water and stir evenly to obtain a mixed slurry, the amount of water added is twice the mass of the steel slag powder;

[0052] 2) Adding step (1) sodium sulfate solution with 0.5% mass of the mixed slurry and polyethylene glycol with 0.8% mass of the mixed slurry, mix evenly, and modify by ball milling in a planetary ball mill;

[0053]3) After fully drying the modified slurry, press it into tab...

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Abstract

The invention discloses an admixture for dry-process cement kiln clinker production, and belongs to the technical field of building material admixtures. The admixture disclosed by the invention is prepared from the following raw materials in parts by weight: 3-10% of rare earth, 20-40% of fluorite, 3-10% of nano metal powder, 30-60% of gypsum, 5-10% of modified steel slag powder and 1-5% of glycerol. The rare elements are hybridized and doped in clinker combustion, so that the eutectic point can be reduced, and the effects of destroying the crystal structure and improving the activity of the clinker are achieved. Fluorite and gypsum are added to achieve a mineralization effect, and metal nano powder is doped to catalyze clinker combustion, so that the firing speed is increased. The nano metal powder and the modified steel slag are matched with each other, so that efficient combustion of the clinker is jointly realized. The additive disclosed by the invention is 0.6-1% in doping amount,can remarkably improve the yield of a raw mill, improve the strength of clinker, fix sulfur and denitrate, comprehensively reduce the cost and realize efficient reutilization of waste resources, andhas wide economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of building material admixtures, and in particular relates to an admixture used for dry-process cement kiln clinker production. Background technique [0002] In the past two decades, due to the rapid development of the national economy, the demand for cement has promoted the rapid development of the cement industry, and successively eliminated the wet and semi-dry production methods with high energy consumption, heavy pollution, low labor productivity, and unstable product quality. The outdated production capacity of Liboer cellar, hollow cellar and mechanized vertical cellar. The advanced equipment of large-scale (daily output of 2500T clinker or more) dry-process rotary kiln with rotary-floating preheater and calciner outside the kiln, which has fully realized automatic control. It plays a very important role in reducing energy consumption, reducing pollution, stabilizing product quality and improving lab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/42
CPCC04B7/428C04B7/424C04B7/425C04B7/421
Inventor 李兰勇王林卢有华
Owner 临沂德艺科技发展有限公司
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