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A kind of magnesium oxychloride cement pouring material and preparation method thereof

A technology for magnesium oxychloride cement and castables, which is applied in the field of magnesia unshaped refractory castables, can solve problems such as occupying land and pollute the environment, and achieves the effects of reducing line deformation, reducing production costs and reducing environmental pollution.

Active Publication Date: 2017-11-07
辽宁科大中驰镁建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, with the current increasing industrial production, industrial waste such as tailings powder and flue gas desulfurization ash has serious problems such as occupying a large amount of land and polluting the environment, which has become a bottleneck for the development of the mining industry.

Method used

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  • A kind of magnesium oxychloride cement pouring material and preparation method thereof
  • A kind of magnesium oxychloride cement pouring material and preparation method thereof
  • A kind of magnesium oxychloride cement pouring material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] A magnesium oxychloride cement pouring material, its chemical composition and mass percentage content are: 5-3mm mid-range sintered magnesia 20-26%, 3-1mm mid-range sintered magnesia 24-30%, 1-0mm mid-grade sintered magnesia 22-28%, 200 mesh mid-grade sintered magnesia powder 15-20%, magnesium oxychloride cement binder 6-10%, the chemical composition and mass percentage of the magnesium oxychloride cement binder are: light-burned magnesia powder 30-33%, magnesium chloride 14-16%, mixed material 17-20%, water 35-40%. Magnesia powder is lightly burned magnesite powder.

[0017] The performance of the castable is in accordance with "Test method for compressive strength at room temperature of refractory materials" GB / T 5072-2008, "Test method for flexural strength of refractory materials at room temperature" GB / T 3001-2007, "Test method for refractoriness of refractory materials" GB / T 7322-2007, "Test method for refractory castable softening temperature under load" (non-di...

Embodiment 2

[0020] A magnesium oxychloride cement castable and its preparation method are the same as in Example 1, except that the mixed materials added to the magnesium oxychloride cement binder are tailings powder and slag powder, and the tailings powder and slag powder are mixed in any proportion. The performance test method of magnesium oxychloride cement castable is the same as embodiment 1.

[0021] The refractoriness of the castable meets the standard requirements, the load softening temperature is 1660°C, the compressive strength at room temperature is 70MPa, the flexural strength at room temperature is 18MPa, and the bulk density is 2.82g cm -3 , The heating permanent line changes 0.96%.

Embodiment 3

[0023] A magnesium oxychloride cement castable and its preparation method are the same as in Example 1, except that the mixed material added in the magnesium oxychloride cement binder is slag powder. The performance test method of magnesium oxychloride cement castable is the same as embodiment 1.

[0024] The refractoriness of the castable meets the standard requirements, the load softening temperature is 1660°C, the compressive strength at room temperature is 76MPa, the flexural strength at room temperature is 17MPa, and the bulk density is 2.9g cm -3 , The heating permanent line changes 0.93%.

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Abstract

The invention discloses a pouring material using magnesium oxychloride cement as a binder and a preparation method thereof, aiming at making full use of waste resources and developing low cement. The chemical composition of the castable is: 5-3mm mid-range sintered magnesia, 3-1mm mid-range sintered magnesia, 1-0mm mid-range sintered magnesia, 200 mesh mid-range sintered magnesia powder, magnesium oxychloride cement binder, the The chemical components of the magnesium oxychloride cement binder are: lightly burned magnesium oxide powder, magnesium chloride, mixed materials and water. The preparation method of the castable: first put the light-burned magnesia powder and the mixed material into the mixer, then take the clear liquid of the magnesium chloride solution and add it to the mixer, stir it into a uniform magnesium oxychloride cement slurry in the mixer, and then add the middle-grade sintering Magnesia, stirred evenly, and vibrated to form magnesium oxychloride cement castables. The invention adopts the magnesium oxychloride cement binder, so that the magnesium oxychloride cement pouring material has the characteristics of high temperature resistance, and its load softening temperature can reach more than 1600 DEG C.

Description

technical field [0001] The invention relates to the field of magnesia unshaped refractory castables, in particular to a magnesium oxychloride cement castable and a preparation method thereof. Background technique [0002] Magnesia unshaped refractory castable is composed of refractory aggregate, powder, and a certain amount of binder and water. It has certain fluidity and is suitable for construction by pouring. It can be hardened without high temperature heating. Unshaped refractory materials, commonly used binders are Portland cement, aluminate cement and phosphate cement. With the increase of the ratio of unshaped refractory materials in refractory materials, refractory castables have developed rapidly, with increased varieties and improved quality. The focus is still on the development of low-cement, ultra-low cement and cement-free refractory castables. [0003] Magnesium oxychloride cement is an inorganic cementitious material prepared by mixing magnesium chloride sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 李晶孙恩禹毕万利王楠关岩李国栋杨学奇陈英李宇
Owner 辽宁科大中驰镁建材科技有限公司