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Building thermal insulation wall body material and preparation method thereof

A technology for wall material and building thermal insulation, applied in the field of building thermal insulation materials, can solve the problems of increasing the cost of steel production, environmental pollution, occupying land, etc., and achieve the effects of low cost, no radioactive pollution, and short cycle.

Inactive Publication Date: 2014-07-09
姜全辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of iron tailings are generally disposed of by landfill, which not only wastes resources, but also occupies land. The factory has to pay land acquisition fees, transportation fees, and landfill fees, which increases the production cost of steel and causes environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Ingredients:

[0025] The ratio of raw materials is calculated according to the following weight percentages: 38% of red mud, 20% of iron tailings, 22% of feldspar, 15% of yellow sand, and 5% of foaming agent; 20% of water ball mill is added and dried to obtain powder.

[0026] 2. Molding: Press the prepared powder under 15MPa to obtain a green body.

[0027] 3. Drying: Place in natural state or in drying oven at 80°C for 24 hours.

[0028] 4. Firing: room temperature → 120°C, heating rate is 2°C / min, holding for 60 minutes; 120°C → 650°C, heating rate is 2°C / min, holding for 120 minutes; 650°C → 900°C, heating rate is 10°C / min, Heat preservation for 60 minutes; 900°C→1200°C, the heating rate is 10°C / min, heat preservation for 240min-480min; finally cool down to room temperature with the furnace, and the building insulation wall material is obtained.

[0029] After testing, the density of building insulation material is 0.73g / cm 3 , in line with the requiremen...

Embodiment 2

[0031] 1. Ingredients:

[0032] The ratio of raw materials is as follows by weight percentage: 35% red mud, 22% iron tailings, 20% feldspar, 18% yellow sand, 5% foaming agent; add 20% water ball mill and dry to obtain powder.

[0033] 2. Others are the same as embodiment 1

[0034] After testing, the density of building insulation material is 0.81g / cm 3 , in line with the requirements of JC / T 1062-2007; the porosity is 42.6%, the compressive strength is 25.2MPa, in line with the requirements of GB 13544-2011; the thermal conductivity is 0.17 w / (m k), in line with JC / T 1062- 2007 request.

Embodiment 3

[0036] 1. Ingredients:

[0037] The ratio of raw materials is as follows by weight percentage: 30% red mud, 25% iron tailings, 25% feldspar, 14% yellow sand, 6% foaming agent; add 20% water ball mill and dry to obtain powder.

[0038] 2. Others are the same as embodiment 1

[0039] After testing, the density of building insulation material is 0.75g / cm 3 , in line with the requirements of JC / T 1062-2007; the porosity is 46.8%, the compressive strength is 23.9MPa, in line with the requirements of GB 13544-2011; the thermal conductivity is 0.15 w / (m k), in line with JC / T 1062- 2007 requirements.

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Abstract

The invention relates to a method for preparing a building thermal insulation wall body material by utilizing industrial waste red mud, iron tailings, feldspars and yellow sand through a high temperature foaming method. The building thermal insulation wall body material mainly comprises the following materials by mass percent: the red mud accounts for 20 to 40 percent, the iron tailings account for 15 to 30 percent, the feldspars account for 20 to 30 percent, the yellow sand accounts for 12 to 20 percent, and inflating agents account for 2 to 8 percent. The method for preparing the building thermal insulation wall body material comprises the steps such as material mixing, blank body preparation, high-temperature foaming and the like. The method for preparing the building thermal insulation wall body material is of great significance in aspects of efficiently utilizing industrial waste residues, reducing the environmental pollution caused by the industrial waste residues and lowering the manufacturing cost; and meanwhile, the produced building thermal insulation wall body material is light and porous, achieves high intensity, and achieves functions such as better heat preservation, heat insulation, acoustic insulation and the like.

Description

technical field [0001] The invention relates to the field of building thermal insulation materials, in particular to a method for preparing building thermal insulation wall materials by utilizing industrial waste slag red mud and iron tailings. Background technique [0002] Red mud is an extremely fine-grained, strongly alkaline solid waste residue produced during the production of alumina from bauxite. For every ton of alumina produced, about 0.8 to 1.5 tons of red mud are produced. my country is a big producer of alumina. In 2009, it produced 23.78 million tons of alumina, accounting for about 30% of the world's total output, and produced nearly 30 million tons of red mud. At present, the comprehensive utilization rate of red mud in my country is only 4%, and the cumulative stockpiles have reached 200 million tons. With the annual increase of alumina production in my country and the gradual decrease of bauxite grade, the annual production of red mud will continue to incr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C04B38/02C04B30/00C04B18/30
CPCY02W30/91
Inventor 姜全辉
Owner 姜全辉