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Method for producing heat storage brick by magnesite tailing

A heat storage brick and magnesite technology, applied in the direction of solid waste removal, etc., can solve the problems of low thermal shock stability of mafic heat storage materials, achieve strong heat storage capacity, avoid large accumulations, and improve the environment Effect

Inactive Publication Date: 2012-07-25
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of the thermal storage bricks listed above is that the thermal shock stability of the mafic thermal storage material is not high.
In addition, the method of using magnesite tailings as raw material to produce heat storage bricks has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 55% of the mass percentage of magnesite tailings and 45% of the mass percentage of iron ore powder, mix the two materials, dry them at a temperature of 110°C, and mill the dried materials in a ball mill. Add 5% water by mass for mixing, and press the mixed material into a billet with a force of 500KN. The billet was dried at 110°C for 24 hours, and the dried billet was heated to 650°C in a furnace, kept for 30 minutes, kept at 850°C for 30 minutes, and kept at 1500°C for 120 minutes to make aggregate. The aggregate is crushed and screened into four particle sizes of 5-3mm; 3-1mm; 1-0.088mm; 0.088-0.02mm, according to the mass percentage 5-3mm particle size 20%; 15%; 0.088-0.02mm particle size 35% of the ingredients, at the same time add 5% by mass of sulfurous acid pulp waste liquid as a binder, then add 1% of the aggregate mass of steel fiber to mix evenly, and knead with a mixer . After mixing evenly, use a pressure of 1000KN to press into heat storage bricks, ...

Embodiment 2

[0023] Take magnesite tailings with a mass percentage of 40% and iron ore powder with a mass percentage of 60%, mix the two materials, dry them at a temperature of 110°C, and mill the mixed materials in a ball mill, and the ball-milled raw materials are put in a mixer Add 5% water by mass for mixing, and press the mixed material into a billet with a force of 550KN. The billet was dried at 110°C for 24 hours, and the dried billet was heated to 650°C in a furnace, kept for 30 minutes, kept at 850°C for 30 minutes, and kept at 1500°C for 120 minutes to make aggregate. The aggregate is broken and screened into four particle sizes: 5-3mm; 3-1mm; 1-0.088mm; 0.088-0.02mm particle size, according to the mass percentage 5-3mm particle size 20%; Particle size 20%; 0.088-0.02mm30% particle size ratio batching, at the same time add 5% mass percentage of sulfurous acid pulp waste liquid as a binder, then add 1.5% of the aggregate mass of steel fiber to mix evenly, and use a mixer to mix r...

Embodiment 3

[0025] Take magnesite tailings with a mass percentage of 65% and iron ore powder with a mass percentage of 35%, mix the two materials, dry them at a temperature of 110°C, and ball-mill the dried materials in a ball mill, and the ball-milled raw materials in a mixer Add 5% water by mass for mixing, and press the mixed material into a billet with a force of 500KN. The billets were dried at 110°C for 24 hours, and the dried billets were heated in a furnace to 650°C for 30 minutes, kept at 850°C for 30 minutes, and kept at 1500°C for 120 minutes to make aggregates. The aggregate is crushed and screened into four particle sizes: 5-3mm; 3-1mm; 1-0.088mm; 0.088-0.02mm, according to the mass percentage 5-3mm particle size 23%; 15%; 0.088-0.02mm32% particle size proportioning, at the same time add 5% mass percentage of sulfurous acid pulp waste liquid as a binder, then add 1.3% steel fiber of aggregate mass, mix evenly, and knead with a mixer . After mixing evenly, use a pressure of ...

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Abstract

The invention discloses a method for producing a heat storage brick by the magnesite tailing, which improves the heat storage capability and the thermal shock stability of the heat storage brick. The method for producing the heat storage brick by the magnesite tailing comprises the following steps of: mixing 55-65wt% of magnesite tailing and 35-45wt% of iron powdered ore; carrying out ball milling to mixed materials in a ball mill; adding 5wt% of water into the ball-milling material in a mixing mill for mixing to obtain aggregate; breaking and screening the prepared aggregate; adding 5wt% of sulphurous acid paper pulp waste liquor as binder; then adding 1-1.5wt% of steel fiber to evenly mix; and mixing by the mixing mill; and pressing the mixed material into the heat storage brick under the pressure of 1000-1200KN. The method disclosed by the invention is characterized in that the magnesite tailing which is the waste after the magnesite tailing is adopted for mineral separation serves as raw material, the magnesite resource is effectively utilized, the phenomenon that a great quantity of magnesite tailing is accumulated is avoided, and the environment is improved. Meanwhile, the mafic heat storage material produced by the magnesite tailing has strong heat storage capability, the compression strength can reach 50-60MP, and the bulk density reaches 2.5-4g / cm<3>.

Description

technical field [0001] The invention relates to the technical field of refractory brick energy storage engineering, in particular to a method for producing heat storage bricks from magnesite tailings. Background technique [0002] At present, there are some public reports on the method of producing heat storage bricks. After consulting the patent literature, the following several disclosed heat storage brick technologies are related to the present invention: [0003] 1. "An anti-adhesion and high temperature heat storage checker brick", publication (announcement) number: CN101948321A, the mass percentage of the heat storage checker brick is: silica particles 50-60%, silica fine powder 20-30%, waste silicon Brick particles 6-14%, iron and phosphorus powder 0.5-1.5%, lime milk 0.5-1.5%, fly ash 1-2%, lignin 1.5-3%. The checker brick has a smooth surface, low dust adhesion and long service life. [0004] 2. "Regenerator Brick", publication (announcement) number: CN1316399, th...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/622B09B3/00
Inventor 李静汪琦路艳国
Owner UNIV OF SCI & TECH LIAONING
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