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Regenerative magnesium-aluminium-chromium brick and preparation method

A technology for aluminum-chrome bricks and magnesia bricks, which is applied in the field of recycled magnesia-alumina-chrome bricks and its preparation, and can solve the problems of different crystal phases and unstable quality

Inactive Publication Date: 2012-07-25
JINZHOU YINGMING REFRACTORY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This unfired magnesia-chrome brick has unstable quality during use due to the different crystal phases inside the waste bricks.

Method used

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  • Regenerative magnesium-aluminium-chromium brick and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Select raw materials in parts by weight:

[0030] Waste magnesia brick 75 parts

[0031] Aluminum chrome slag 15 parts

[0032] 5 parts chrome ore

[0033] Chrome Green 5 parts

[0034] Waste magnesia bricks (used waste magnesia bricks in high-temperature industry, the thickness of the etched layer is less than 30mm, and the mass percentage of MgO is 75%) After removing the etched layer, crush it into waste magnesia brick particles with a particle size of ≤5mm; Sieve the crushed waste magnesia brick particles to obtain waste magnesia brick particles with a particle size of less than 1mm, 1-3mm, and 3-5mm; The waste magnesia brick particles below 1 mm are crushed into powders with a particle size of ≤0.088 mm; 20 parts of waste magnesia brick particles with a particle size of 3 to 5 mm, and waste magnesia bricks with a particle size of 1 to 3 mm are prepared in parts by weight. 45 parts of granules, 5 parts of waste magnesia brick particles with a particle size of 0-...

Embodiment 2

[0036] Select raw materials in parts by weight:

[0037] 65 pieces of discarded magnesia bricks

[0038] Aluminum chrome slag 15 parts

[0039] 10 parts chrome ore

[0040] Chrome Green 5 parts

[0041] Zirconia 5 parts

[0042] After the waste magnesia bricks (used waste magnesia bricks in high-temperature industry, the thickness of the etched layer is less than 25mm, and the mass percentage of MgO is 78%) are removed, they are crushed into waste magnesia bricks with a particle size of ≤5mm; Sieve the crushed waste magnesia brick particles to obtain waste magnesia brick particles with a particle size below 1mm, 1-3mm, and 3-5mm; , zirconia, and some waste magnesia brick particles with a particle size of less than 1mm were broken into powders with a particle size of ≤0.088mm; 30 parts of waste magnesia brick particles, 10 parts of waste magnesia brick particles with a particle size of 0-1 mm, 17 parts of aluminum chrome slag powder with a particle size of 0.088 mm or less...

Embodiment 3

[0044] Select raw materials in parts by weight:

[0045] 65 pieces of discarded magnesia bricks

[0046] Aluminum chrome slag 15 parts

[0047] 15 parts chrome ore

[0048] Zirconia 5 parts

[0049] After the waste magnesia bricks (used waste magnesia bricks in high-temperature industry, the thickness of the etched layer is less than 26mm, and the mass percentage of MgO is 80%) are removed, they are crushed into waste magnesia bricks with a particle size of ≤5mm; Sieve the crushed waste magnesia brick particles to obtain waste magnesia brick particles with a particle size below 1mm, 1-3mm, and 3-5mm; , zirconia, and some waste magnesia brick particles with a particle size of less than 1mm were broken into powders with a particle size of ≤0.088mm; 40 parts of waste magnesia brick particles, 5 parts of waste magnesia brick particles with a particle size of 0-1mm, 15 parts of aluminum-chrome slag powder with a particle size of 0.088mm or less, 15 parts of chrome ore powder, a...

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Abstract

The invention relates to a regenerative magnesium-aluminium-chromium brick and a preparation method. The regenerative magnesium-aluminium-chromium brick comprises the following components in parts by weight: 65 to 80 parts of waste magnesite brick particles and powder; 15 to 25 parts of alumina-chrome slag powder; 5 to 15 parts of chrome ore powder; 0 to 5 parts of chrome green powder and 0 to 5 parts of zirconium oxide powder. The preparation method comprises the following steps of: removing etching layers of waste magnesite bricks, crushing and sieving into particles with particle sizes of below 1mm, 1 to 3mm and 3 to 5mm; respectively crushing alumina-chrome slags, chrome ores, chrome green, zirconium oxide and part of waste magnesite brick particles with the particle size of below 1mm into powder with the particle size of less than or equal to 0.088mm; adding the powder into a mixing rolling mill and adding calcium lignosulphonate solution to carry out mixing rolling; after mixing rolling, carrying out compression moulding in a press; and drying and firing to obtain the regenerative agnesium-aluminium-chromium brick. According to the invention, the alumina-chrome slags and the waste magnesite bricks are used as raw materials, the price is low, waste slags and waste bricks are timely processed and the problems of space occupation and environmental pollution are solved; the prepared regenerative magnesium-aluminium-chromium brick has good bonding strength, strong wear resistance, good anti-erosion ability and high thermal shock resistance.

Description

Technical field [0001] The present invention involves a regenerative magnesium -aluminum chromium brick and preparation method. Background technique [0002] With the advancement of my country's industrialization process, the scale of high -temperature industries has developed rapidly, and the demand for refractory materials is increasing.Magnesium -quality refractory bricks with a MGO content greater than 75%are the refractory tiles widely used in my country's high temperature industry; the annual output of refractory bricks such as magnesium bricks, magnesium chromium bricks, magnesium and aluminum bricks The main raw materials are: electric melting magnesium, magnesium aluminum spinel, and imported high chromium ore. The price of raw materials is expensive and the production cost is high.After the use of my country each year, the amount of magnesium brick abandonment is more than 1.5 million tons, and the amount of waste is increased year by year. In addition, the production o...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 彭霞刘晨光
Owner JINZHOU YINGMING REFRACTORY MATERIALS
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