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A non-fired modified high-purity magnesium-aluminum spinel composite brick and its preparation method

A technology of pure magnesia-alumina spinel and magnesia-alumina spinel, which is applied in the field of non-fired modified high-purity magnesia-alumina spinel composite bricks and its preparation, can solve problems such as potential safety hazards, powerful explosions, suffocation and death, and achieve anti-corrosion Strong oxidation ability, low shrinkage rate, and strong slag erosion resistance

Inactive Publication Date: 2020-07-24
沈阳罗泰智能系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although natural gas is colorless and odorless, in order to facilitate leak detection, mercaptans are used to add odor to natural gas before being sent to end users, and mercaptans will also produce certain sulfides; although natural gas is essentially harmless to the human body , but in a state of high concentration, it will cause suffocation and death; natural gas as a fuel will also cause casualties due to explosion. Although natural gas is lighter than air and easy to disperse, when the natural gas accumulates in a closed environment to a certain proportion, it will trigger A powerful explosion, so using natural gas to provide heat energy has certain safety hazards

Method used

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  • A non-fired modified high-purity magnesium-aluminum spinel composite brick and its preparation method
  • A non-fired modified high-purity magnesium-aluminum spinel composite brick and its preparation method
  • A non-fired modified high-purity magnesium-aluminum spinel composite brick and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The raw materials were weighed according to the components specified in Table 1 below, and the preparation method was as follows.

[0045] (1) Weigh high-purity magnesia and high-purity magnesia-aluminum spinel according to parts by weight, put them into a crusher for crushing, put them into a ball mill for crushing after crushing, and use a vibrating screen to screen out a particle size of 5- 150 mesh aggregate.

[0046] (2) Weigh fused magnesia powder, fused magnesia alumina spinel sand fine powder, fused magnesia alumina spinel sand superfine powder, desiliconized zirconia, cerium oxide and activated alumina micropowder according to parts by weight , put into a container and mix to form a powder.

[0047] (3) Mixing: Put the prepared aggregate into the mud mixer, add the complex magnesium-aluminum cementing agent, the speed is 20-30r / min, and the stirring time is 5-10 minutes. When stirring, add water until the binding agent forms a slurry The material is wrapped o...

Embodiment 2

[0052] The method of Example 1 was repeated at the content of each component specified in Table 1 below, and the test results are listed in Table 4.

Embodiment 3

[0054] The method of Example 1 was repeated at the content of each component specified in Table 1 below, and the test results are listed in Table 4.

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Abstract

The invention belongs to the technical field of high-grade fireproof materials for metallurgy, non-ferrous metal, glass and cement kilns and preparation methods thereof, and in particular relates to unfired modified high-purity magnesium-aluminum spinel composite bricks and a preparation method thereof. The unfired modified high-purity magnesium-aluminum spinel composite bricks take high-purity magnesia powder with the magnesium content of 99 percent as a raw material; a complexed magnesium-aluminum cementing agent and rare-earth oxide are used for modifying the magnesium-aluminum spinel composite bricks for the first time; a preparation process adopts an electric energy low-temperature drying technology to prepare at 200 DEG C. The unfired modified high-purity magnesium-aluminum spinel composite bricks provided by the invention have the advantages of high purity, great density, high strength, good high-temperature thermal shock durability, high corrosion resistance and high molten metal resistance and anti-oxidization capability, no emission of harmful gas and accordance with green refractory standards and the like; the preparation method is simple and high-temperature firing is not needed; the cost is low and no carbon and no chromium are discharged by the raw materials; magnesium-carbon bricks and magnesium-chromium bricks, which are used for a steel ladle, are replaced, and carbon-free and chromium-free emission is realized; the preparation method has no pollution and zero emission; molten steel is cleaned, energy saving and emission reduction are realized and the preparation is safe.

Description

technical field [0001] The invention belongs to the technical field of high-grade refractory materials for metallurgy, non-ferrous, glass and cement kilns and their preparation, and in particular relates to a non-fired modified high-purity magnesium-aluminum spinel composite brick and a preparation method thereof. Background technique [0002] Key goals of "Made in China 2025": high-efficiency, low-cost clean steel production technology, advanced steel composition design, iron and steel material inclusion state control, simulation optimization of the refining process outside the furnace, optimization of refining equipment design outside the furnace, optimization of refractory manufacturing configuration, Steel for advanced manufacturing parts, high-performance marine steel, new steel tough automobile steel, high-speed and heavy-duty rail transit steel, and ultra-high-strength stainless steel for special equipment. In recent years, with the strengthening of public environmenta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/043C04B35/622
CPCC04B35/0435C04B35/622C04B2235/3217C04B2235/3222C04B2235/3229C04B2235/3244C04B2235/608C04B2235/61C04B2235/96C04B2235/9607C04B2235/9676C04B2235/9684
Inventor 孙光郭全营
Owner 沈阳罗泰智能系统有限公司
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