Method for producing baking-free bricks by solidifying construction wastes by utilizing phosphogypsum

A construction waste, non-burning brick technology, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of large accumulation of phosphogypsum and construction waste, difficult to deal with, and avoid secondary environmental problems. Pollution, low cost, and the effect of reducing energy consumption

Inactive Publication Date: 2010-12-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of huge accumulation of phosphogypsum and construction waste, which are difficult to deal with, the present invention provides a method for producing burn-free bricks by using phosphogypsum to solidify construction waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A. Prepare materials according to the following mass components:

[0037] Phosphogypsum 80kg Construction waste 600kg

[0038] Yellow phosphorus slag 10kg Fly ash 5kg

[0039] Quicklime 5kg Water glass 8kg

[0040] Soda ash 2.5kg Caustic soda 1.5kg

[0041] Polycarboxylate 3kg Calcium Fluosilicate 1.5kg

[0042] Sodium Fluosilicate 1.5kg Sodium Chloride 5kg

[0043] Urban domestic sewage 95kg

[0044] in,

[0045] Construction waste refers to construction waste from which plastics, wood and daily necessities have been removed, and the construction waste is crushed to a particle size of 0.2mm, and the iron is removed with a conventional magnetic separator;

[0046] B. Dry the yellow phosphorus slag, fly ash, and quicklime to a moisture content of 4%, add calcium fluorosilicate, sodium fluorosilicate, and sodium chloride, and grind until the particle size of the powder is less than 0.083mm;

[0047] C. Dissolving water glass, soda ash, caustic soda and polycarboxyl...

Embodiment 2

[0053] A. Prepare materials according to the following mass components:

[0054] Phosphogypsum 70kg Construction waste 500kg

[0055]Fly ash 30kg Water glass 10kg

[0056] Caustic soda 5kg Calcium lignosulfonate 2kg

[0057] Sodium lignosulfonate 1kg Sodium humate 1kg

[0058] Sodium Phosphate 3kg Sodium Sulphate 2kg

[0059] A total of 70kg of ordinary tap water, papermaking wastewater, red mud attached liquid, and alkali-containing wastewater, of which:

[0060] Construction waste is construction waste from which plastics, wood and daily necessities have been removed, and the construction waste is crushed to a particle size of 2 mm, and the iron is removed by magnetic suction with a conventional magnet machine;

[0061] B. Dry the fly ash to a water content of 3%, add sodium phosphate and sodium sulfate, and grind until the particle size of the powder is less than 0.083mm;

[0062] C. Dissolving water glass, caustic soda, calcium lignosulfonate, sodium lignosulfonate, a...

Embodiment 3

[0068] A. Prepare materials according to the following mass components:

[0069] Phosphogypsum 60kg Construction waste 400kg

[0070] Blast furnace slag 20kg Carbide slag 20kg

[0071] Water glass 8kg Caustic soda 2kg

[0072] Calcium lignosulfonate 2kg Sodium lignosulfonate 2kg

[0073] Sodium chloride 5kg Sodium sulfate 5kg

[0074] Salt waste water and condensed water total 100kg, of which:

[0075] Construction waste refers to construction waste that removes plastics, wood and daily necessities, and the construction waste is crushed to a particle size of 1mm, and the iron is absorbed by a conventional magnet machine;

[0076] B. Dry the blast furnace slag and calcium carbide slag to a moisture content of 2%, add sodium chloride and sodium sulfate, and grind until the particle size of the powder is less than 0.083mm;

[0077] C. dissolving water glass, caustic soda, calcium lignosulfonate, and sodium lignosulfonate in saline waste water and condensed water to prepare a...

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Abstract

The invention provides a method for producing baking-free bricks by solidifying construction wastes by utilizing phosphogypsum, comprising the following steps: taking the construction wastes as a main raw material, adding phosphogypsum solidifying agent, high-temperature calcined or molten activating agents such as industrial residues, water glass and sodium carbonate and the like, water reducer such as polycarboxylic acid or calcium lignosulphonate and the like, and additives such as calcium fluosilicate or sodium fluosilicate and the like; stirring and mixing, shaping, maintaining and the like to obtain the baking-free brick with the advantages of high strength, low softening coefficient, low water absorption, wet and heat resistance, good alternating ability, freeze resistance and no swell and the like. The method of the invention solves the problems that the existing phosphogypsum and the construction wastes have enormous piling quantities and are difficult to be processed, and makes full use of potential activity of construction wastes to prepare a high-quality baking-free brick used for construction at the coaction of phosphogypsum and other additives; the construction waste use amount can reach 99%; the brick not only has low cost and good physical performance, but also effectively utilizes construction and industrial wastes, thus being beneficial for protecting environments, saving energy and lowing energy consumption.

Description

technical field [0001] The invention relates to a method for producing non-burning bricks, in particular to a method for producing non-burning bricks by solidifying construction waste with phosphogypsum, and belongs to the technical field of building material preparation. Background technique [0002] Construction waste is solid waste generated during the construction, maintenance, and demolition of buildings, including waste concrete blocks, bricks, asphalt concrete blocks, mortar and concrete scattered during construction, broken bricks, metal, bamboo wood, decorations The waste generated from decoration, various packaging materials and other wastes are mainly composed of concrete and sintered bricks. [0003] With the increasing pace of urban construction, the amount of construction waste is also increasing. According to relevant information, the rough statistics on the loss of building construction materials such as brick-concrete structures, fully cast-in-place structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/16
CPCY02W30/91
Inventor 夏举佩张召述谷立轩
Owner KUNMING UNIV OF SCI & TECH
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