Method for preparing unglazed stair brick from vanadium-titanium magnet tailings

A vanadium-titanium magnet and stair brick technology, which is applied in the field of green building materials preparation, can solve the problems such as the difficulty in increasing the industrial added value of vanadium-titanium magnet tailings, so as to improve the actual utilization rate, reduce the cost of raw materials, and improve the wear resistance of the brick surface Effect

Inactive Publication Date: 2018-12-21
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the present situation in the field of research and development of the problem that it is difficult to increase the industria...

Method used

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  • Method for preparing unglazed stair brick from vanadium-titanium magnet tailings

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Experimental program
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Effect test

Embodiment 1

[0026] (1) After washing, sieving, and drying the vanadium-titanium magnet tailings, it is placed in a linked powder activation device for refinement. The refinement medium is zirconium dioxide prisms, the spindle speed is 480 rpm, and the refinement time is 8 Hours to obtain micron-sized active vanadium-titanium magnetite tailings;

[0027] (2) Mix the active vanadium-titanium magnetite tailings, alumina powder, manganese dioxide powder, iron powder, and potassium carbonate powder at a ratio of 67:10.7:9.5:10.2:2.6 for 2.1 hours, and then add a polymer with a mass concentration of 10%. The spheroidizing agent of vinyl alcohol aqueous solution is placed in a high-pressure mold for compression molding, and the molding pressure is 87MPa;

[0028] (3) Put the cold pressed body into a pusher kiln for preheating, sintering and cooling. The time of each step is 3 hours, 5 hours and 7 hours respectively, and the maximum sintering temperature is 1170℃; finally, the surface high-energy heat...

Embodiment 2

[0030] (1) After washing, sieving and drying the vanadium-titanium magnet tailings, it is placed in a linked powder activation device for refinement. The refinement medium is zirconia prism, the spindle speed is 400 revolutions / min, and the refinement time is 9 Hours to obtain micron-sized active vanadium-titanium magnetite tailings;

[0031] (2) Mix the active vanadium-titanium magnetite tailings, alumina powder, manganese dioxide powder, iron powder, and potassium carbonate powder in a ratio of 64:11.7:10.5:11.2:2.6 for 3.1 hours, and then add 10% polymer with a mass concentration of The spheroidizing agent of vinyl alcohol aqueous solution is placed in a high-pressure mold and pressed into a shape with a molding pressure of 58MPa;

[0032] (3) Put the cold-pressed body into a pusher kiln for preheating, sintering and cooling. The time for each step is 3 hours, 5 hours and 7 hours respectively, and the maximum sintering temperature is 1270℃; finally, the surface high-energy heat ...

Embodiment 3

[0034] (1) After washing, sieving and drying the vanadium-titanium magnet tailings, it is placed in a linked powder activation device for refinement. The refinement medium is zirconium dioxide prism, the spindle speed is 500 rpm, and the refinement time is 8 Hours to obtain micron-sized active vanadium-titanium magnetite tailings;

[0035] (2) Mix the active vanadium-titanium magnetite tailings, alumina powder, manganese dioxide powder, iron powder, and potassium carbonate powder at a ratio of 65:9.9:10.7:12.3:2.1 for 2.8 hours, and then add a polymer with a mass concentration of 10%. The spheroidizing agent of vinyl alcohol aqueous solution is placed in a high-pressure mold for compression molding, and the molding pressure is 88MPa;

[0036] (3) Put the cold-pressed body into the pusher kiln for preheating, sintering and cooling. The time of each step is 3 hours, 5 hours and 7 hours respectively, and the maximum sintering temperature is 1250℃; finally, the surface high-energy heat...

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Abstract

The invention discloses a method for preparing an unglazed stair brick from vanadium-titanium magnet tailings. The method comprises the following steps: firstly, performing refining treatment to obtain micron-sized active vanadium-titanium magnet tailings, mixing the micron-sized active vanadium-titanium magnet tailings with a correcting raw material, an oxidant and a cosolvent, mounding, finallysintering in a pushed slab kiln, and performing surface wear resisting treatment to finally obtain an unglazed stair brick material. By the method, with the vanadium-titanium magnet tailings as a mainraw material, through addition of the correcting raw material, the oxidant and the cosolvent and by a surface wear resisting technology, preparation of the unglazed stair brick is achieved, the costof the raw materials is greatly reduced and the wear resistance of the surface of the brick is improved. The unglazed stair brick prepared by the method provided by the invention has the compressive strength being higher than or equal to 14100 MPa, the surface hardness being higher than or equal to 6800 MPa and the porosity being lower than or equal to 2.6%.

Description

Technical field [0001] The invention relates to the technical field of green building material preparation, in particular to a method for preparing unglazed staircase tiles from vanadium-titanium magnetite tailings. Background technique [0002] Vanadium-titanium magnetite tailings is a kind of industrial solid waste. At this stage, it is mainly used in cement, concrete, glass and road paving, making its industrial added value not high. Therefore, it is very important to develop a new way to increase its industrial added value. [0003] Stair bricks are a building material with huge demand. The high-quality raw materials such as porcelain clay and kaolin that have been used have a high cost, and require surface glazing to improve wear resistance, making it difficult to meet the needs of environmental and social development. Summary of the invention [0004] The present invention aims at the current situation in the research and development field where it is difficult to improve the...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B41/00C04B41/80
CPCC04B33/132C04B33/1328C04B41/0072C04B41/80C04B2235/3217C04B2235/3267C04B2235/405Y02P40/60
Inventor 董洪峰
Owner SHAANXI SCI TECH UNIV
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