Method for producing air entrapping building block by utilizing red mud

A technology of aerated blocks and red mud, applied in the field of comprehensive utilization of resources and new building materials, to achieve the effects of light bulk density, large usage and high strength

Inactive Publication Date: 2010-02-17
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In summary, there have been reports of using red mud as auxiliary raw material to produce cement, wall bricks, and road materials, but there has been no report of using red mud as the main raw material for the production of aerated blocks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Formulation composition (substance measurement unit is mass part):

[0032] Raw materials: 60 parts of red mud, 5 parts of quicklime, 35 parts of active cementitious material (its specific composition is 70% of fly ash, 30% of cement, silicon / calcium ratio of 3.0), 85 parts of general industrial water;

[0033] Auxiliary materials: 0.05 parts of commercially available aluminum powder, 0.8 parts of additives, wherein the mass ratio of additives is: water glass 40%, sodium hydroxide 20%, calcium lignosulfonate 40%;

[0034] Process:

[0035] A. Put the above-mentioned fly ash and quicklime respectively in conventional ball mills in the prior art, and grind them into a powder with a particle size of 325 mesh sieve and a sieve residue of less than 5%, and then weigh the fly ash according to the above ratio , slaked lime powder, red mud, cement, water and additives, and added to the conventional agitator with adjustable speed in the prior art, first slowly stirred at 120 rp...

Embodiment 2

[0042] Formulation composition (substance measurement unit is mass part):

[0043] Main ingredients: 70 parts of red mud, 10 parts of quicklime, 20 parts of active cementitious material (its specific composition is 80% of blast furnace slag, 20% of cement, silicon / calcium ratio of 2.7), 90 parts of paper mill waste liquid;

[0044] Auxiliary materials: 0.06 parts of commercially available aluminum powder, 0.5 parts of additives, wherein the mass ratio of additives is: water glass 50%, sodium fluorosilicate 17%, sodium lignosulfonate 33%;

[0045] Process:

[0046]A. Put the above-mentioned blast furnace slag and unslaked lime respectively in the conventional ball mill in the prior art, and grind them into a powder with a particle size of 325 mesh sieves and a sieve residue of less than 5%, and then weigh high Slag, slaked lime powder, red mud, cement, water and additives are added to the conventional agitator with adjustable speed in the prior art. First, stir slowly at 120 r...

Embodiment 3

[0053] Formulation composition (substance measurement unit is mass part):

[0054] Main ingredients: 50 parts of red mud, 10 parts of quicklime, 40 parts of active cementitious material (its specific composition is 50% of blast furnace slag, 30% of yellow phosphorus slag, 20% of fly ash, silicon / calcium ratio of 2.2), general industrial water 100 copies;

[0055] Auxiliary materials: 0.04 parts of commercially available aluminum powder, 0.65 parts of additives, wherein the mass ratio of additives is: 72% of water glass, 28% of sodium lignosulfonate;

[0056] Process:

[0057] A. Put the above-mentioned yellow phosphorus slag and unslaked lime respectively in the conventional ball mill of the prior art, and grind them into a powder whose particle size is passed through a 325 mesh sieve, and the sieve residue is less than 5%, and then weigh the yellow phosphorus according to the above mass ratio Slag, slaked lime powder, red mud, cement, water and additives are added to the co...

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PUM

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Abstract

The invention provides a method for producing an air entrapping building block by utilizing red mud, comprising the following steps: mixing the following raw materials (dry basis) by weight part: 50-70 parts of red mud, 5-10 parts of calcium oxide and 20-40 parts of active gelled material; adding water according to 85-100 percent of the dry basis mass of the mixture, adding aluminium powder according to 0.04-0.06 percent of the dry basis mass of the mixture and adding an auxiliary agent according to 0.5-0.8 percent of the dry basis mass of the mixture; mixing to prepare a sizing agent; and finally obtaining the air entrapping building block through foaming, standing and steam curing. The air entrapping building block has the advantages of stable physical properties, light weight, good heat-insulation property, high waste use ratio, simple process, low cost, environmental protection, natural resource saving and the like, and can be used as non-load bearing partitions of urban high-risebuildings and as heat-insulation building blocks of low-temperature warehouses, heat-insulation warehouses and cold storage warehouses of industrial equipment.

Description

technical field [0001] The invention relates to a method for producing an aerated block by using red mud, and belongs to the technical field of resource comprehensive utilization and new building materials. Background technique [0002] Red mud is the solid waste slag discharged during the alumina production process. When alumina is produced by the sintering method, Bayer method and hybrid method of the prior art, solid waste slag-red mud will be discharged, but it will vary depending on the specific alumina production method. Different from the quality of bauxite, the chemical composition, physical properties and mineral structure of red mud are different. Because of the high iron oxide content in it, its appearance color is similar to laterite, so it is generally called red mud. [0003] my country is the fourth largest producer of alumina in the world. Every ton of alumina produced produces about 1.5 tons of red mud (dried), and each ton of dried red mud also comes with 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/50B28B11/24C04B28/10C04B18/14
CPCC04B2111/28C04B28/10C04B2111/2038C04B28/18Y02W30/91C04B7/02C04B12/04C04B18/0409C04B18/08C04B18/141C04B18/145C04B22/04C04B22/062C04B22/126C04B22/16C04B24/18C04B38/02C04B40/0082C04B40/024C04B40/0259C04B2103/20C04B2103/302
Inventor 夏举佩张召述苗庆东
Owner KUNMING UNIV OF SCI & TECH
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