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High-strength wear-resistant anti-corrosion brick and manufacturing method thereof

A high-strength, kaolin technology, applied in the field of refractory materials, can solve the problems of unusable, service life of only one to two months, and service life of only 80 days, etc., to achieve moderate cost, good performance and low wear.

Active Publication Date: 2014-03-12
JIANGSU JIANGNENG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnesia-chrome bricks and magnesium-chrome-zirconium bricks in the existing market cannot meet such requirements, and the service life is only one to two months
A customer uses silicon-molybdenum bricks, which are used in the high-temperature section of the laterite nickel ore rotary kiln for direct reduction, and its service life is only 23 days. It only reached 80 days, (the thickness of the brick is 300mm, 60% of it is worn away, and only 120mm is left, which cannot be used)

Method used

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  • High-strength wear-resistant anti-corrosion brick and manufacturing method thereof
  • High-strength wear-resistant anti-corrosion brick and manufacturing method thereof
  • High-strength wear-resistant anti-corrosion brick and manufacturing method thereof

Examples

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Embodiment 1

[0029] A high-strength, wear-resistant and anti-intrusion brick comprises the following raw materials in parts by weight: 60 parts of bauxite, 20 parts of chrome concentrate, 1 part of metallic silicon micropowder, and 10 parts of kaolin.

[0030] The bauxite contains Al 2 o 3 ≥80%, Fe 2 o 3 ≤1.2%, bulk density 2.6~2.8g / cm 3 , particle size 0-5mm; the chrome concentrate contains Cr 2 o 3 ≥47%, particle size 0-0.05mm; the metal silicon powder contains metal silicon content ≥96, particle size 0-1μm; the kaolin SiO 2 ≥62%, Al 2 o 3 ≥35%, Fe 2 o 3 ≤1.5%, particle size 0~0.05mm.

[0031] A method for preparing high-strength wear-resistant and anti-invasion bricks, comprising the following steps in sequence:

[0032] 1), ingredients: according to the formula, mix bauxite, chrome concentrate, metal silicon micropowder, kaolin, and add 65% phosphoric acid accounting for 2% of the total weight of the above components, send it into the kneader and stir it for 3 minutes, then ...

Embodiment 2

[0040] A high-strength, wear-resistant and anti-intrusion brick comprises the following raw materials in parts by weight: 80 parts of bauxite, 7 parts of chrome concentrate, 10 parts of metal silicon micropowder, and 8 parts of kaolin.

[0041] The bauxite contains Al 2 o 3 ≥85%, Fe 2 o 3 ≤1.2%, bulk density 2.6~2.8g / cm 3 , particle size 0-5mm; the chrome concentrate contains Cr 2 o 3 ≥47%, particle size 0-0.05mm; the metal silicon powder contains metal silicon content ≥96%, particle size 0-1μm; the kaolin SiO 2 ≥62%, Al 2 o 3 ≥35%, Fe 2 o 3 ≤1.5%, particle size 0~0.05mm.

[0042] A method for preparing high-strength wear-resistant and anti-invasion bricks, comprising the following steps in sequence:

[0043] 1), ingredients: according to the formula, mix bauxite, chrome concentrate, metal silicon micropowder, kaolin, and add 30% phosphoric acid accounting for 7% of the total weight of the above components, and send it into the kneader and stir it for 5 minutes befo...

Embodiment 3

[0051] A high-strength, wear-resistant and anti-invasion brick comprises the following raw materials in parts by weight: 75 parts of bauxite, 8 parts of chrome concentrate, 5 parts of metal silicon micropowder, and 1 part of kaolin.

[0052] The bauxite contains Al 2 o 3 ≥85%, Fe 2 o 3 ≤1.2%, bulk density 2.6~2.8g / cm 3 , particle size 0-5mm; the chrome concentrate contains Cr 2 o 3 ≥47%, particle size 0-0.05mm; the metal silicon powder contains metal silicon content ≥96%, particle size 0-1μm; the kaolin SiO 2 ≥62%, Al 2 o 3 ≥35%, Fe 2 o 3 ≤1.5%, particle size 0~0.05mm.

[0053] A method for preparing high-strength wear-resistant and anti-invasion bricks, comprising the following steps in sequence:

[0054] 1), ingredients: according to the formula, mix bauxite, chrome concentrate, metal silicon micropowder, kaolin, add 40% phosphoric acid accounting for 5% of the total weight of the above components, send it into the kneader and stir it for 15 minutes, then take it ...

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Abstract

The invention discloses a high-strength wear-resistant anti-corrosion brick and a manufacturing method thereof, and belongs to the field of refractory materials. The high-strength wear-resistant anti-corrosion brick comprises the following raw materials in parts by weight: 50-100 parts of bauxite, 5-20 parts of chromium concentrate, 1-10 parts of metallic silicon submicron powder and 1-10 parts of kaolin. The high-strength wear-resistant anti-corrosion brick is prepared by successively performing burdening, mulling, molding, drying and sintering. The high-strength wear-resistant anti-corrosion brick provided by the invention not only is simple in production technology and moderate in cost, but also is good in usage performances, and the service life of the high-strength wear-resistant anti-corrosion brick in a high-temperature segment of a laterite-nickel ore rotary kiln employing a direct reduction technology is up to one year or more, so that the production cost of a nickel iron enterprise is substantially reduced, the comprehensive energy consumption is reduced, the user requirements are completely exceeded, and impressive economic benefit is obtained.

Description

technical field [0001] The invention belongs to the field of refractory materials, and relates to a high-strength wear-resistant and anti-intrusion brick and a manufacturing method thereof, in particular to a high-strength wear-resistant and anti-invasion brick for the high-temperature section of the direct reduction process of a laterite nickel ore rotary kiln and a manufacturing method thereof. Background technique [0002] In recent years, my country's laterite nickel ore rotary kiln direct reduction technology has developed rapidly. Its working principle is: use laterite nickel iron ore as raw material, use cheap coal, peat, and medium coal as reducing agent, and use rotary kiln as the main production equipment. Through the three steps of material preheating-reduction melting process-sorting and refining, the product can be formed, with simple process, low energy consumption, low pollution, low cost, not limited by scale, and good product quality (high nickel content, Reac...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10
Inventor 周强裴元龙
Owner JIANGSU JIANGNENG NEW MATERIAL TECH
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