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Preparation method of sludge shale brick

A technology for shale bricks and sludge, which is applied in the field of preparation of sludge shale bricks, can solve the problems of large holes in shale bricks, the thermal insulation performance and frost resistance need to be improved, and the compressive strength is not good, and the density increase can be achieved. The effect of large, enhanced bonding force and improved fiber strength

Pending Publication Date: 2020-07-17
张细荔
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main technical problem to be solved by the present invention is that the current shale bricks are generally porous bricks with poor compressive strength, and the shale bricks fired in ordinary brick factories have large holes and through holes, and the thermal insulation performance and frost resistance need to be improved. defect, a preparation method of sludge shale brick is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The silanol is: Trimethylsilanol

[0035] The toughening fiber is: rock wool fiber

[0036] Preparation of raw meal balls:

[0037] Take the sludge and filter it with an iron net to discard the bulky impurities, then perform suction filtration to obtain a filter cake, put the filter cake in an oven, heat up to 100°C, dry for 3 hours, grind the filter cake and pass through a 200-mesh sieve Obtain the pretreatment sludge, and the sludge is collected from the bottom mud produced during dredging of waterways, ditches, ports, docks, etc.;

[0038] Mix the shale rock, the above-mentioned pretreated sludge and kaolin at a mass ratio of 4:1:1, put them in a ball mill and mill them for 3 hours, pass through a 200-mesh sieve to obtain the mixed raw materials, and put the obtained mixed raw materials at a mass ratio of 1:3. Add in deionized water, stir and mix for 3 hours, continue to stale for 20 hours, filter to remove the filtrate, separate the filter residue and granulate to...

Embodiment 2

[0047] The silanol is: triethylsilanol

[0048] The toughening fiber is: rock wool fiber

[0049] Preparation of raw meal balls:

[0050] Take the sludge and filter it with an iron net to discard the large impurities, then carry out suction filtration to obtain a filter cake, put the filter cake in an oven, heat up to 105°C, dry for 3.5 hours, grind the filter cake and pass through 200 mesh Sieve to obtain the pretreatment sludge, which is collected from the bottom mud produced during dredging of waterways, ditches, ports, docks, etc.;

[0051] Mix the shale rock, the above-mentioned pretreated sludge and kaolin at a mass ratio of 4:1:1, put them in a ball mill and mill them for 3.5 hours, pass through a 200-mesh sieve to obtain the mixed raw materials, and mix the obtained mixed raw materials at a mass ratio of 1:3 Add deionized water to the mixture, stir and mix for 3.5 hours, continue to stale for 22 hours, filter to remove the filtrate, separate the filter residue and gr...

Embodiment 3

[0060] The silanol is: triphenylsilanol

[0061] The toughening fiber is: glass fiber

[0062] Preparation of raw meal balls:

[0063] Take the sludge and filter it with an iron net to discard the bulky impurities, then perform suction filtration to obtain a filter cake, put the filter cake in an oven, heat up to 110°C, dry for 4 hours, grind the filter cake and pass it through a 200-mesh sieve Obtain the pretreatment sludge, and the sludge is collected from the bottom mud produced during dredging of waterways, ditches, ports, docks, etc.;

[0064] Mix the shale rock, the above-mentioned pretreated sludge and kaolin at a mass ratio of 4:1:1, put them in a ball mill and mill them for 4 hours, pass through a 200-mesh sieve to obtain the mixed raw materials, and put the obtained mixed raw materials at a mass ratio of 1:3. Add in deionized water, stir and mix for 4 hours, continue to stale for 24 hours, filter to remove the filtrate, separate the filter residue and granulate to ...

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Abstract

The invention discloses a preparation method of a sludge shale brick, and belongs to the technical field of building material preparation. Toughening fibers and silanol in an anti-freezing filler aredehydrated and coupled so that the fiber strength is improved, the interface adhesion between shale brick mortar and the fiber is improved, the fracture toughness of the shale brick is improved, and the compressive strength is improved. When calcination is performed at the temperature of 300 DEG C during the calcination process, the partial minerals are decomposed and recrystallized along with thetemperature rising to form the new phase so as to provide the brick body strength. The red mud in the filler contains metal oxides such as aluminum oxide and calcium oxide, the aluminum oxide existsin the sludge in the form of crystalline fibers, the crystalline fibers are longitudinally oriented in the shale brick, the toughening fibers are intertwined with rock wool fibers in the shale brick in a crossed mode to form a woven mesh, meanwhile, after the toughening fibers and silanol are subjected to dehydration and coupling, hydrophobic siloxane can be generated, the water seepage preventionperformance of the shale brick is improved, introduced tiny bubbles can slow down the destructive effect generated by freezing and thawing, rosin enables the capillary pore wall of the shale brick tobe hydrophobic, and the freezing resistance is improved.

Description

technical field [0001] The invention discloses a method for preparing sludge shale bricks, which belongs to the technical field of building material preparation. Background technique [0002] Bricks fired at high temperature using shale and coal gangue as raw materials. The strength levels required by the strength level standards are mu30, mu25, mu20, mu15, mu10. When bricks are used as the main building material, the radionuclide limit shall comply with the provisions of GB6566-2001 "Radionuclide Limits of Building Materials". When the radioactive specific activities of natural radionuclides radium-226, thorium-232, and potassium-40 in the main building materials meet IRa≤1.0 and Ir≤1.0 at the same time, their production, sales and use are not restricted. For the main building materials with a hollow rate greater than 25%, if the radioactive specific activities of the natural radionuclides radium-226, thorium-232, and potassium-40 meet IRa≤1.0 and Ir≤1.3 at the same time,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/36C04B33/132C04B33/13C04B33/04C04B41/00
CPCC04B33/04C04B33/13C04B33/1305C04B33/132C04B33/1321C04B33/36C04B41/00C04B41/0072C04B41/009C04B2235/6562C04B2235/6567C04B2235/96C04B2235/9607Y02P40/60
Inventor 张细荔
Owner 张细荔