Cement and manufacturing method thereof

A manufacturing method and cement technology, applied in the field of cement and its manufacturing, can solve the problem that the amount of magnesium sulfate is not very high, and achieve the effects of low price, improved comprehensive performance and reduced cost

Active Publication Date: 2015-03-25
中晶新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the above-mentioned patent documents, the amount of magnesium sulfate used in the cement formula is not very high, which will restr

Method used

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  • Cement and manufacturing method thereof
  • Cement and manufacturing method thereof

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preparation example

[0052] Preparation example (magnesium oxide method flue gas desulfurization produces magnesium sulfate raw material)

[0053] The desulfurizer magnesium oxide powder is added to industrial tap water to make desulfurizer slurry-magnesium hydroxide slurry, and pumped to the desulfurization tower for absorbing sulfur dioxide in the flue gas in the sulfur dioxide absorption spray area.

[0054] Flue gas from sintering machines in steel mills (sulfur dioxide content is 2000mg / Nm 3 , adjusting the oxygen content to be 18vt%) enters the interior of the desulfurization tower from the bottom of the desulfurization tower. During the rising process of the flue gas, it is in contact with the sulfur dioxide absorption spray area, and the flue gas is discharged from the top of the desulfurization tower. The sulfur dioxide absorption spraying area sprays desulfurizer slurry to absorb sulfur dioxide in the flue gas.

[0055] Magnesium sulfate-containing absorption product formed by desulfur...

Embodiment 1-4 and comparative example 1

[0074] Mix the above-mentioned magnesium sulfate raw material with the additive (sodium dihydrogen phosphate) in proportion, add 200mL of water during the mixing process, then add magnesium oxide, fly ash, and steel slag in sequence in proportion, and grind it into 200 mesh in a ball mill. Get magnesium sulfate cement. See the table below for detailed parameters.

[0075]

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Abstract

The invention discloses cement and a manufacturing method thereof, and in particular discloses cement taking magnesium sulfate as a main ingredient and a manufacturing method of the cement. The cement disclosed by the invention contains magnesium sulfate and magnesium oxide, wherein the weight ratio of magnesium sulfate to magnesium oxide is more than 0.9. By adopting the method disclosed by the invention, prejudices of the prior art are overcome, and the comprehensive performance of the cement is improved by greatly improving the content of magnesium sulfate in a cement formula. Moreover, a lot of industrial residues can be added into the cement produced by the method disclosed by the invention, and the main ingredient namely magnesium sulfate is prepared from waste liquid after desulfurization and belongs to desulfurization byproducts, so that the price of the cement is low, and the cost of magnesium sulfate cement is greatly reduced.

Description

technical field [0001] The invention relates to a cement and a manufacturing method thereof, in particular to a cement with magnesium sulfate as a main component and a manufacturing method thereof. Background technique [0002] Conventional cements include magnesium oxysulfide cement or magnesium oxychloride cement and Sorel cement and the like. In these traditional cements, magnesium sulfate is usually used as an auxiliary material. For example, the patent document CN1156701A discloses that magnesium sulfate can be used as an expansion agent for cement, and its mixing amount is 0.3-4.0% of the cement weight. [0003] It is generally believed that in the cement formulation, the amount of magnesium sulfate should not be too high, otherwise it will affect the overall performance of the cement and increase the production cost. Patent document CN 102701616A discloses a high-strength magnesia fly ash clinker-free cement, including 100 parts of fly ash; 30-40 parts of light-burn...

Claims

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Application Information

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IPC IPC(8): C04B9/04
Inventor 童裳慧
Owner 中晶新材料有限公司
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