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Method for preparing water-permeable bricks from vanadium-titanium magnetite tailings

A vanadium-titanium magnet and water seepage brick technology, which is applied in clay products, ceramic products, applications, etc., can solve the problems that it is difficult to improve the water resistance and strength of pavement bricks, and achieve the effect of improving water resistance

Inactive Publication Date: 2018-12-25
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 where it is difficult to improve the water resistance and strength of pavement bricks by common means, and provides a method for preparing water seepage bricks from vanadium-titanium magnet tailings

Method used

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  • Method for preparing water-permeable bricks from vanadium-titanium magnetite tailings

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 1) The vanadium-titanium magnet tailings are subjected to four-step roughening treatment of water washing, drying, heat treatment, and crushing. The heat treatment temperature is 440°C, and the powder is mixed with alumina powder, silicon nitride powder, ferrous oxide powder, and zirconium boride powder according to 73: 13: 2.2: 5.2: 6.6 ratio mixing ball mill, the ball milling method is excitation rotation stirring ball milling, the spindle speed is 160 rpm, the excitation rotation frequency is 0.5, and then add polyvinyl formal alcohol solution balling agent with a mass fraction of 12% in the Molded in a ductile iron low-pressure mold with a molding pressure of 45MPa;

[0025] 2) Put the formed body into a semi-automatic simple tunnel kiln for drying, preheating, degreasing, foaming, heat preservation, quick cooling, slow cooling, and finally cutting and surface low-heat strengthening. The low-heat temperature is 620°C, and finally the water seepage brick material is o...

Embodiment 2

[0027] 1) The vanadium-titanium magnet tailings are subjected to four-step roughening treatment of water washing, drying, heat treatment, and crushing. The heat treatment temperature is 370°C. 14.6: 2.2: 6.9: 4.3 ratio mixing ball milling, the ball milling method is excitation rotating agitation ball milling, the spindle speed is 180 rpm, the excitation rotation frequency is 0.5, and then add polyvinyl formal alcohol solution balling agent with a mass fraction of 12% in the Molded in a ductile iron low-pressure mold with a molding pressure of 32MPa;

[0028] 2) Put the formed body into a semi-automatic simple tunnel kiln for drying, preheating, degreasing, foaming, heat preservation, quick cooling, slow cooling, and finally cutting and surface low-heat strengthening. .

Embodiment 3

[0030] 1) The vanadium-titanium magnet tailings are subjected to four-step roughening treatment of water washing, drying, heat treatment, and crushing. The heat treatment temperature is 520°C, and the powder is mixed with alumina powder, silicon nitride powder, ferrous oxide powder, and zirconium boride powder according to 71: 13.9: 2.2: 5.2: 7.7 ratio mixing ball milling, the ball milling method is excitation rotation stirring ball milling, the spindle speed is 140 rpm, the excitation rotation frequency is 0.5, and then add polyvinyl formal alcohol solution balling agent with a mass fraction of 12% in the Molded in a ductile iron low-pressure mold with a molding pressure of 36MPa;

[0031] 2) Put the formed body into a semi-automatic simple tunnel kiln for drying, preheating, degreasing, foaming, heat preservation, quick cooling, slow cooling, and finally cutting and surface low-heat strengthening. The low-heat temperature is 600°C, and finally the water seepage brick material...

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Abstract

The invention discloses a method for preparing water-permeable bricks from vanadium-titanium magnetite tailings. The method includes: performing roughening treatment to obtain activated vanadium-titanium magnetite tailings, subjecting to mixed ball milling along with strengthening materials, a foaming agent and an activating agent, adopting a low-pressure mould for compression molding, and finallysubjecting to foaming, sintering and subsequent treatment in a tunnel kiln to obtain a water-permeable brick material. By adoption of the vanadium-titanium magnetite tailings as a main material, high-water-permeability bricks are prepared according to a surface strengthening process through adding of the strengthening materials, the foaming agent and the activating agent, and water resistance ofpavement bricks is remarkably improved. The prepared water-permeable bricks have comprehensive strength larger than or equal to 12400MPa, porosity larger than or equal to 23.6% and through hole rate larger than or equal to 22.9%.

Description

technical field [0001] The invention relates to the technical field of green building material preparation, in particular to a method for preparing permeable bricks from vanadium-titanium magnet tailings. Background technique [0002] Vanadium-titanium magnetite tailings can be used to make building materials such as pavement bricks and road shoulders. The joints between bricks and roadbeds are prone to water accumulation, and long-term soaking will reduce their strength and shorten their service life. Therefore, it is crucial to develop a new technology to improve its water resistance and strength. [0003] Water seepage brick is an ideal water-resistant material, and the micro-through pores are the main way of water seepage, which is also a difficulty in making it. Contents of the invention [0004] The invention aims at the present situation in the field of research and development where it is difficult to improve the water resistance and strength of pavement bricks by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B33/132C04B33/13
CPCC04B33/13C04B33/132C04B38/10C04B2235/3272C04B2235/3813C04B2235/3873C04B2235/96C04B38/0074Y02P40/60
Inventor 董洪峰
Owner SHAANXI SCI TECH UNIV
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