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
3 Cites 10 Cited by

AI-Extracted 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 materia...
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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>.

Application Domain

Technology Topic

BrickTailings +11

Examples

  • Experimental program(4)

Example Embodiment

[0020] Example 1
[0021] Take 55% by mass of magnesite tailings and 45% by mass of iron ore powder. Mix the two materials and dry them at a temperature of 110°C. The dried material is ball milled in a ball mill, and the ball milled raw materials are in a mixer Add 5% by mass water for mixing, and press the mixed material into a blank with a force of 500KN. The billet was dried at 110°C for 24 hours, and the dried billet was heated in a furnace to 650°C for 30 minutes, kept at 850°C for 30 minutes, and 1500°C for 120 minutes to form aggregates. The aggregate crushing screen is divided into 5-3mm; 3-1mm; 1-0.088mm; 0.088-0.02mm, according to the mass percentage of 5-3mm particle size 20%; 3-1mm particle size 30%; 1-0.088mm particle size 15%; 0.088-0.02mm particle size 35% proportion, while adding 5% by mass of sulfite pulp waste liquid as a binder, then adding 1% of the aggregate mass of steel fiber to mix evenly, and mix with a mixer . After uniform mixing, the heat storage bricks are pressed with 1000KN pressure and dried at 110°C for 25 hours. The dried heat storage bricks are sintered in a furnace at 1200°C for 2 hours.

Example Embodiment

[0022] Example 2
[0023] Take 40% mass percentage of magnesite tailings and 60% mass percentage of iron ore powder. Mix the two materials and dry them at a temperature of 110°C. The mixed materials are ball milled in a ball mill, and the ball milled raw materials are milled in a mixer. Add 5% by mass of water for mixing, and press the mixed material into a blank with a force of 550KN. The billet was dried at 110°C for 24 hours, and the dried billet was heated in a furnace to 650°C for 30 minutes, kept at 850°C for 30 minutes, and 1500°C for 120 minutes to form aggregates. The aggregate crushing screen is divided into 5-3mm; 3-1mm; 1-0.088mm; 0.088-0.02mm particle size, according to the mass percentage 5-3mm particle size 20%; 3-1mm particle size 30%; 1-0.088mm Particle size 20%; 0.088-0.02mm 30% particle size proportioning, while adding 5% by mass of sulfite pulp waste liquid as a binder, and then adding 1.5% of the aggregate mass of steel fiber to mix evenly, and mix with a mixer Practice. After mixing uniformly, press the heat storage brick with 1000KN pressure and dry it at 120℃ for 24 hours. The dried heat storage brick is sintered in the furnace at 1300℃ for 3 hours.

Example Embodiment

[0024] Example 3
[0025] Take 65% by mass of magnesite tailings and 35% by mass of iron ore powder. Mix the two materials and dry them at a temperature of 110°C. The dried material is ball milled in a ball mill, and the ball milled raw materials are in a mixer Add 5% by mass of water for mixing, and press the mixed material into a blank with a force of 500KN. The billet was dried at 110°C for 24 hours. The dried billet was heated in a furnace to 650°C for 30 minutes, kept at 850°C for 30 minutes, and 1500°C for 120 minutes to form aggregates. The aggregate crushing screen is divided into 5-3mm; 3-1mm; 1-0.088mm; 0.088-0.02mm, according to the mass percentage 5-3mm particle size 23%; 3-1mm particle size 30%; 1-0.088mm particle size 15%; 0.088-0.02mm, 32% particle size ratio, while adding 5% by mass of sulfite pulp waste liquid as a binder, and then adding 1.3% of the aggregate mass of steel fiber to mix uniformly, and mix with a mixer . After being uniformly mixed, the heat storage brick is pressed with a pressure of 1000KN and dried at 110°C for 24 hours. The dried heat storage brick is sintered in a furnace at a temperature of 1300°C for 2 hours.
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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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