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Preparation method of vanadium-doped tailings inorganic-foam thermal-insulation material for buildings

An inorganic foam, building insulation technology, applied in ceramic products, applications, household appliances and other directions, can solve the problems of environmental protection performance discount, unfavorable promotion, bulk density, high thermal conductivity of foamed concrete materials, and achieve good apparent density and improve airtightness. The effect of uniformity and pore size distribution

Active Publication Date: 2014-07-30
SHANGLUO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, inorganic building insulation materials on the market mainly include expanded perlite, aerated concrete blocks, sulphoaluminosilicate inorganic insulation boards, etc. The biggest advantage of this type of material is its strong fire resistance. The coefficients are all high, which is not conducive to large-scale promotion
In addition, because the production of ordinary Portland cement needs to emit a large amount of CO 2 and other pollutants, a large amount of ordinary Portland cement will inevitably lead to a great reduction in the environmental performance of foam concrete materials

Method used

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preparation example Construction

[0028] The present invention is a kind of preparation method of vanadium-doped tailings inorganic foam building insulation material, comprising the following steps:

[0029] 1) Dry the vanadium tailings, blast furnace water-quenched slag and ingredients until the moisture content is ≤1%, and set aside; the ingredients refer to fly ash, desulfurized gypsum, cement clinker, ordinary Portland cement, and sulphoaluminate One or a mixture of cement or lightly burned bauxite tailings;

[0030] 2) Grinding the solid waste M with pozzolanic activity and powder activity to a specific surface area of ​​300m 2 / kg-2200m 2 / kg, wherein, solid waste M includes blast furnace water-quenched slag and ingredients, blast furnace water-quenched slag accounts for 1-90% of the mass of solid waste M, and ingredients accounts for 10-99% of the mass of solid waste M;

[0031] 3) Grinding the vanadium tailings until the specific surface area is 400m 2 / kg-1500m 2 / kg; According to mass percentage,...

Embodiment 1

[0036] Disperse 0.20kg of polypropylene fiber into 40kg of water, stir for about 30s to disperse evenly; then add 40kg of cementitious material, stir for 1min to make it evenly mixed; then add 0.44kg of calcium stearate and 2kg of perlite in sequence And the triethanolamine of 0.20kg and stir 30s to make it mix homogeneously, obtain unfoamed slurry; Add 2.10kg mass concentration in unfoamed slurry and be 30% hydrogen peroxide, stir 6s, obtain pre-foamed slurry; The obtained pre-foamed slurry is poured into shape, and then through maintenance, demoulding and cutting in sequence, the vanadium-doped tailings inorganic foam building insulation material with a porosity of 92% is obtained.

Embodiment 2

[0038] Add 0.20kg of polypropylene fiber to 40kg of water, stir for about 30s to disperse evenly; then add 40kg of cementitious material, stir for about 1min, after mixing evenly, add 0.44kg of calcium stearate, 2.5kg of perlite and 0.22kg of Triethanolamine is stirred about to make it mix uniformly for 30 s to obtain an unfoamed slurry; then add 2.10 kg of mass concentration to the unfoamed slurry and be 30% hydrogen peroxide, and stir for about 8 s to obtain a pre-foamed slurry; The pre-foamed slurry is poured into shape, followed by maintenance, demoulding and cutting in sequence to obtain a vanadium-doped tailings inorganic foam building insulation material with a porosity of 91%.

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Abstract

The invention discloses a preparation method of a vanadium-doped tailings inorganic-foam thermal-insulation material for buildings, which comprises the following steps of dispersing vanadium tailings powder, polypropylene fibers, fly ash, common Portland cement, calcium stearate and triethanolamine in water so as to obtain non-foamed slurry; and adding hydrogen peroxide with a mass concentration of 30% into the non-foamed slurry, molding obtained pre-formed slurry by casting, and carrying out maintenance, demoulding and cutting on the obtained product so as to obtain the vanadium-doped tailings inorganic-foam thermal-insulation material for buildings. The heat transfer capability of the thermal-insulation material for buildings is reduced by over 100% in comparison with common wall bodies, so that the total thickness and total weight of a wall body can both be reduced by over 60%, thereby solving a bottleneck problem that current materials for wall bodies for housing industrialization are inconvenient to install. According to the invention, by controlling the adding amount and stirring time and strength of the hydrogen peroxide, the foaming effect is controlled, the coefficient of thermal conductivity is reduced, and the heat preservation effect is enhanced; by taking an early strength agent and an accelerator as anti-collapse agents, the rejection rate is reduced, and a novel vanadium-doped tailings inorganic-foam thermal-insulation material for buildings is prepared.

Description

【Technical field】 [0001] The invention relates to a preparation method of building materials, in particular to a preparation method of vanadium-doped tailings inorganic foam building insulation material. 【Background technique】 [0002] At present, the commonly used building insulation materials at home and abroad are divided into two types: organic matter and inorganic matter. Organic building insulation materials include polystyrene foam (EPS, XPS), polyurethane rigid foam (PU), etc., which have the advantages of light weight, heat preservation, heat insulation, and waterproof. However, these organic foam materials are prone to aging and cannot last the same life as the building. During the service life of the building, the insulation layer needs to be replaced many times. In addition, EPS, XPS, PU, ​​etc. are polymer organic materials, which have defects such as flammability, low temperature resistance, fast burning speed, and a large amount of toxic gas, which poses a gr...

Claims

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Application Information

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IPC IPC(8): C04B28/08C04B38/02C04B16/06C04B14/18
Inventor 周春生崔孝炜狄燕清李春郭家林王之宇庄肃凯
Owner SHANGLUO UNIV
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