Process and method for converting waste slag wholly of aluminum industry into ecological building material

Abstract

The invention belongs to a method for utilizing resources. The method utilizes the matter characteristics of solid wastes (six kinds of waste residues) such as red mud(the sintered method and the Bayer method), boiler slag, ore dressing tailings, ash and gas generation slag, which are generated during the manufacturing process in aluminum industry, and converts the solid wastes into a novel road material and construction walling material by the processes such as drying, crushing, reasonable proportioning, machine shaping(grinding and extrusion) and consolidation or sintering. The method is characterized in that the utilization ratio of the waste residues is 100 percent. The waste residues comprise the following compositions: (1) the produced road material-curing agent, which can be used to reinforce a highway subgrade and bases of road surface substrates(substrate and subbase) and buildings and completely replace cement, lime and sandstone materials, and the road material can meet prior national(industrial) standards and environmental protection standards in performance; and (2) the produced construction walling materials-non supporting brick, supporting brick, air brick, hollow building block, common tile, glazed roof tile and andorful tile, which are superior to the prior national standards in performance. The material obtained by the invention has the characteristics of energy conservation, thermal insulation, high strength, corrosion resistance, efflorescence resistance and no pollution.

Description

technical field

[0001] Disclosed is a process and method for transforming all aluminum industry process waste residues into ecological building materials. The invention belongs to the resource utilization method of industrial solid waste slag produced by aluminum industry sintering method and Bayer method process to produce alumina. Background technique

[0002] According to available data, my country's aluminum industry uses sintering and Bayer processes to produce alumina to produce a large amount of industrial solid waste - red mud (sintering process, Bayer process), boiler slag, beneficiation tailings, ash slag, gas generation slag The stockpiles of six kinds of waste residues, sludge and sludge, are about hundreds of millions of tons. Except for chemical ash, gas generator slag, and boiler slag, which have been comprehensively utilized, most of the above-mentioned waste residues are still piled up, which not only occupies a large amount of land and farmland, but also po...

Examples

example 1

[0010] Mixing ratio: red mud + gas generation slag + ash slag + trace additives = 25+52+23 (trace additives are)

[0011] (1) Drying of raw materials: According to the above mixing ratio, the raw materials are sent to the tunnel kiln drying chamber for drying to 4% water content.

[0012] (2) Raw material pulverization: grind into powder with a ball mill, and the particle size passes through a 80-mesh sieve.

[0013] (3) Mixing and stirring: the above-mentioned raw materials are mixed evenly in two-stage and double-layer with a double-roller mixer.

[0014] (4) Finished product and packaging: The uniformly stirred mixture is sealed and packaged, which is the finished product of the curing agent.

[0015] The curing agent is used to replace all the lime, cement and sand and gravel in the subbase and base of the secondary road from Chalco to Yuntai Mountain in Jiaozuo City, and meets the requirements of the "Highway Engineering Quality Inspection and Evaluation Standard" after ...

example 2

[0017] Mixing ratio: red mud + gas generation slag + mineral processing tailings + sludge = 20+25+50+5 (mass ratio)

[0018] (1) Drying of raw materials: According to the above mixing ratio, the raw materials are sent to the tunnel kiln drying chamber for drying to 4% water content.

[0019] (2) Crushing of raw materials: crushing with a hammer crusher, particle size ≤ 1.0mm.

[0020] (3) Mixing and stirring: the above-mentioned raw materials are fully mixed, and after mixing, water is added to carry out two-stage double-layer stirring with a double-roller mixer, and the amount of water added during mixing and stirring is 12% to 16% of the weight of the mixture;

[0021] (4) Precipitation: Let the mixed materials rest for 24 hours.

[0022] (5) Extrusion molding: Extrude the above-mentioned mixture into strips with a two-stage vacuum brick extruder.

[0023] (6) cutting adobe: the above-mentioned extruded blank is cut into adobe with an automatic vertical strip cutter and a ...

technical field

[0001] Disclosed is a process and method for transforming all aluminum industry process waste residues into ecological building materials. The invention belongs to the resource utilization method of industrial solid waste slag produced by aluminum industry sintering method and Bayer method process to produce alumina. Background technique

[0002] According to available data, my country's aluminum industry uses sintering and Bayer processes to produce alumina to produce a large amount of industrial solid waste - red mud (sintering process, Bayer process), boiler slag, beneficiation tailings, ash slag, gas generation slag The stockpiles of six kinds of waste residues, sludge and sludge, are about hundreds of millions of tons. Except for chemical ash, gas generator slag, and boiler slag, which have been comprehensively utilized, most of the above-mentioned waste residues are still piled up, which not only occupies a large amount of land and farmland, but also po...

Examples

example 1

[0010] Mixing ratio: red mud + gas generation slag + ash slag + trace additives = 25+52+23 (trace additives are)

[0011] (1) Drying of raw materials: According to the above mixing ratio, the raw materials are sent to the tunnel kiln drying chamber for drying to 4% water content.

[0012] (2) Raw material pulverization: grind into powder with a ball mill, and the particle size passes through a 80-mesh sieve.

[0013] (3) Mixing and stirring: the above-mentioned raw materials are mixed evenly in two-stage and double-layer with a double-roller mixer.

[0014] (4) Finished product and packaging: The uniformly stirred mixture is sealed and packaged, which is the finished product of the curing agent.

[0015] The curing agent is used to replace all the lime, cement and sand and gravel in the subbase and base of the secondary road from Chalco to Yuntai Mountain in Jiaozuo City, and meets the requirements of the "Highway Engineering Quality Inspection and Evaluation Standard" after ...

example 2

[0017] Mixing ratio: red mud + gas generation slag + mineral processing tailings + sludge = 20+25+50+5 (mass ratio)

[0018] (1) Drying of raw materials: According to the above mixing ratio, the raw materials are sent to the tunnel kiln drying chamber for drying to 4% water content.

[0019] (2) Crushing of raw materials: crushing with a hammer crusher, particle size ≤ 1.0mm.

[0020] (3) Mixing and stirring: the above-mentioned raw materials are fully mixed, and after mixing, water is added to carry out two-stage double-layer stirring with a double-roller mixer, and the amount of water added during mixing and stirring is 12% to 16% of the weight of the mixture;

[0021] (4) Precipitation: Let the mixed materials rest for 24 hours.

[0022] (5) Extrusion molding: Extrude the above-mentioned mixture into strips with a two-stage vacuum brick extruder.

[0023] (6) cutting adobe: the above-mentioned extruded blank is cut into adobe with an automatic vertical strip cutter and a ...

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