Magnesium oxysulfate cement and preparation method thereof

A magnesium oxysulfate cement and a technology for cement are applied in the field of magnesium oxysulfate cement, and can solve the problems of high production cost, low mechanical properties, utilization of waste sulfuric acid, etc. Effect

Inactive Publication Date: 2013-08-28
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a magnesium oxysulfate cement produced by using waste sulfuric acid, which can solve the current problems of high production cost, low mechanical properties and waste sulfuric acid utilization of magnesium oxysulfate cement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Magnesium oxysulfide cement prepared by using industrial waste sulfuric acid. The cement is composed of the following raw materials in parts by weight (kg): 100 parts of magnesium oxide, 0.1 parts of admixture, 200 parts of industrial waste sulfuric acid with a mass fraction of 10%, 0 parts of water, and fillers. 300 copies.

[0018] Among them: the admixture is phosphoric acid, magnesium oxide is magnesite lightly burned powder, and the filler is fly ash.

[0019] The mass fraction is 10% of industrial waste sulfuric acid from titanium dioxide industrial by-products.

[0020] The preparation method of the magnesium oxysulfide cement prepared by utilizing waste sulfuric acid is:

[0021] First, weigh the raw materials according to the proportion, then put the magnesium oxide and filler into the mixer, and finally put the admixture and industrial waste sulfuric acid into the mixer, and stir evenly to form a slurry.

[0022] The magnesium oxysulfide cement prepared by u...

Embodiment 2

[0024] The magnesium oxysulfide cement prepared by utilizing industrial waste sulfuric acid is composed of the following raw materials in parts by weight (kg):

[0025] 100 parts of magnesium oxide, 0.05 parts of admixture, 70 parts of industrial waste sulfuric acid with a mass fraction of 25%, 10 parts of water, and 0 parts of filler.

[0026] Among them: the additive is sodium dihydrogen phosphate, and the magnesium oxide is lightly burned magnesite powder.

[0027] The mass fraction is 10% of industrial waste sulfuric acid from titanium dioxide industrial by-products.

[0028] The preparation method of the magnesium oxysulfate cement prepared by utilizing waste sulfuric acid is:

[0029] First, weigh the raw materials according to the proportion, then put the magnesium oxide and filler into the mixer, and finally put the admixture and industrial waste sulfuric acid into the mixer, and stir evenly to form a slurry.

[0030] The magnesium oxysulfate cement prepared by using...

Embodiment 3

[0032] The magnesium oxysulfide cement prepared by utilizing industrial waste sulfuric acid is composed of the following raw materials in parts by weight (kg):

[0033] 100 parts of magnesium oxide, 0.05 parts of admixture, 50 parts of industrial waste sulfuric acid with a mass fraction of 35%, 60 parts of water, and 150 parts of filler.

[0034] Among them: the admixture is potassium monohydrogen phosphate, the magnesium oxide is lightly burned magnesite powder, and the filler is shale powder.

[0035] The mass fraction is that 35% industrial waste sulfuric acid comes from the acetate industry.

[0036] The preparation method of the magnesium oxysulfide cement prepared by utilizing waste sulfuric acid is:

[0037] First, weigh each raw material according to the proportion, then mix the admixture with magnesium oxide and filler evenly and put it into the mixer, and finally put industrial waste sulfuric acid and water into the mixer, and stir it evenly to form a slurry.

[00...

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Abstract

The invention relates to magnesium oxysulfate cement which comprises the following raw materials in parts by weight: 100 parts of magnesium oxide, 0 to 300 parts of filling material, 0.05 to 5 parts of additive, 10 to 200 parts of waste industrial sulfuric acid and 0 to 100 parts of water. By directly replacing magnesium sulfate with the waste industrial sulfuric acid as one raw material of the magnesium oxysulfate cement, reasonably proportioning the raw materials and adding proper amount of the additive, the magnesium oxysulfate cement which is high in mechanical strength, good in water resistance, difficult to crack and nonhygroscopic is obtained. Therefore, the production cost of the magnesium oxysulfate cement is lowered; and the environmental pollution is reduced. The magnesium oxysulfate cement is good in environmental-friendly, social and economic benefits.

Description

【Technical field】 [0001] The invention relates to a magnesium oxysulfide cement, in particular to a magnesium oxysulfide cement prepared by using waste sulfuric acid. 【Background technique】 [0002] Magnesium oxysulfate cement is an air-hardening cementitious material prepared from one of the main raw materials of light-burned magnesia. Both magnesium oxysulfide cement and magnesium oxychloride cement can be called magnesium cement, which has the characteristics of light weight, fire prevention, fast setting, sound insulation, and heat insulation. Compared with magnesium oxychloride cement, magnesium oxysulfide cement has the main advantages of good temperature resistance and poor corrosion resistance to steel bars. The traditional preparation method of magnesium oxysulfate cement is mainly prepared by blending magnesium sulfate solution with light-burned magnesium oxide. Because the price of magnesium sulfate is higher, the production cost of magnesium oxysulfate cement p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/30
Inventor 吴成友余红发董金美文静李颖郑利娜谭永山
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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