Method for preparing red mud building material product based on compound microorganism technology

Abstract

The invention discloses a method for preparing a red mud building material product based on a compound microorganism technology, and belongs to the field of red mud building material products. The method solves the pollution problem of red mud, and comprises the following steps: mixing red mud and steel slag according to a mass ratio of 1: 1-3: 1 to obtain a composite cementing material; bacillus mucilaginosus, bacillus subtilis and bacillus aceticus are mixed according to the mass ratio of 1: 1: 1-3: 1: 1, and a compound microorganism is obtained; fully mixing the composite cementing material, water, sand and composite microorganisms, uniformly stirring to obtain slurry, pouring the slurry into a mold, vibrating and molding to obtain a test piece; curing and demolding the test piece to obtain a sample, and sequentially performing standard curing and carbonization curing on the sample to obtain the red mud building material product. The method can be used for preparing red mud building material products.

Description

technical field

[0001] The invention relates to a method for preparing red mud building material products based on composite microorganism technology, and belongs to the field of red mud building material products. Background technique

[0002] Red mud is a highly alkaline solid waste produced in the alumina production process. Due to the difference in ore grade, production method and technical level, about 1.0-1.8 tons of red mud will be discharged for every 1 t of alumina produced. At present, my country has become the largest producer of alumina and red mud in the world. The annual discharge of red mud exceeds 50 million tons, and the comprehensive utilization rate is only 4%. The cumulative stockpiled red mud exceeds 350 million tons. The red mud exceeds 3 billion tons. The stacking of a huge amount of red mud not only occupies a large amount of land, but also the alkali and soluble heavy metal ions in the red mud will seep into the ground, causing pollution of groundwat...

Examples

Embodiment 1

[0026] The method for preparing red mud building material products based on composite microbial technology comprises the following steps:

[0027] 1) Mix red mud and steel slag according to the ratio in Table 1 to obtain a composite cementitious material;

[0028] 2) mixing Bacillus colloidus, Bacillus subtilis and Bacillus acetic acid in a mass ratio of 1:1:1 to 2:1:1 to obtain a composite microorganism;

[0029] 3) According to the ratio in Table 1, add composite cementitious material, water, sand and composite microorganisms and mix thoroughly, stir evenly to obtain a slurry, then pour the slurry into a mold and vibrate to form it to obtain a test piece;

[0030] 4) Put the test piece in an environment with a relative humidity of 60% and a temperature of 20°C for 30 hours to remove the mold to obtain a sample, place the sample in an environment with a relative humidity of 98% and a temperature of 20°C for standard curing for 3 days, and put it in a relative The red mud bui...

Embodiment 2

[0034] The method for preparing red mud building material products based on composite microbial technology comprises the following steps:

[0035] 1) Mix red mud and steel slag according to the ratio in Table 1 to obtain a composite cementitious material;

[0036] 2) mixing Bacillus colloidus, Bacillus subtilis and Bacillus acetic acid in a mass ratio of 1:1:1 to obtain a composite microorganism;

[0037] 3) According to the ratio in Table 1, add composite cementitious material, water, sand and composite microorganisms and mix thoroughly, stir evenly to obtain a slurry, then pour the slurry into a mold and vibrate to form it to obtain a test piece;

[0038] 4) Put the test piece in an environment with a relative humidity of 63% and a temperature of 22°C for 48 hours to remove the mold to obtain a sample, place the sample in an environment with a relative humidity of 99% and a temperature of 22°C for standard curing for 5 days, and put it in a relatively The red mud building m...

Embodiment 3

[0040] The method for preparing red mud building material products based on composite microbial technology comprises the following steps:

[0041] 1) Mix red mud and steel slag according to the ratio in Table 1 to obtain a composite cementitious material;

[0042] 2) mixing Bacillus colloidus, Bacillus subtilis and Bacillus acetic acid in a mass ratio of 2:1:1 to obtain a composite microorganism;

[0043] 3) According to the ratio in Table 1, add composite cementitious material, water, sand and composite microorganisms and mix thoroughly, stir evenly to obtain a slurry, then pour the slurry into a mold and vibrate to form it to obtain a test piece;

[0044] 4) Put the test piece in an environment with a relative humidity of 61% and a temperature of 18°C ​​for 30 hours to remove the mold to obtain a sample, place the sample in an environment with a relative humidity of 96% and a temperature of 21°C for standard curing for 4 days, and put it in a relative The red mud building m...

technical field

[0001] The invention relates to a method for preparing red mud building material products based on composite microorganism technology, and belongs to the field of red mud building material products. Background technique

[0002] Red mud is a highly alkaline solid waste produced in the alumina production process. Due to the difference in ore grade, production method and technical level, about 1.0-1.8 tons of red mud will be discharged for every 1 t of alumina produced. At present, my country has become the largest producer of alumina and red mud in the world. The annual discharge of red mud exceeds 50 million tons, and the comprehensive utilization rate is only 4%. The cumulative stockpiled red mud exceeds 350 million tons. The red mud exceeds 3 billion tons. The stacking of a huge amount of red mud not only occupies a large amount of land, but also the alkali and soluble heavy metal ions in the red mud will seep into the ground, causing pollution of groundwat...

Examples

Embodiment 1

[0026] The method for preparing red mud building material products based on composite microbial technology comprises the following steps:

[0027] 1) Mix red mud and steel slag according to the ratio in Table 1 to obtain a composite cementitious material;

[0028] 2) mixing Bacillus colloidus, Bacillus subtilis and Bacillus acetic acid in a mass ratio of 1:1:1 to 2:1:1 to obtain a composite microorganism;

[0029] 3) According to the ratio in Table 1, add composite cementitious material, water, sand and composite microorganisms and mix thoroughly, stir evenly to obtain a slurry, then pour the slurry into a mold and vibrate to form it to obtain a test piece;

[0030] 4) Put the test piece in an environment with a relative humidity of 60% and a temperature of 20°C for 30 hours to remove the mold to obtain a sample, place the sample in an environment with a relative humidity of 98% and a temperature of 20°C for standard curing for 3 days, and put it in a relative The red mud bui...

Embodiment 2

[0034] The method for preparing red mud building material products based on composite microbial technology comprises the following steps:

[0035] 1) Mix red mud and steel slag according to the ratio in Table 1 to obtain a composite cementitious material;

[0036] 2) mixing Bacillus colloidus, Bacillus subtilis and Bacillus acetic acid in a mass ratio of 1:1:1 to obtain a composite microorganism;

[0037] 3) According to the ratio in Table 1, add composite cementitious material, water, sand and composite microorganisms and mix thoroughly, stir evenly to obtain a slurry, then pour the slurry into a mold and vibrate to form it to obtain a test piece;

[0038] 4) Put the test piece in an environment with a relative humidity of 63% and a temperature of 22°C for 48 hours to remove the mold to obtain a sample, place the sample in an environment with a relative humidity of 99% and a temperature of 22°C for standard curing for 5 days, and put it in a relatively The red mud building m...

Embodiment 3

[0040] The method for preparing red mud building material products based on composite microbial technology comprises the following steps:

[0041] 1) Mix red mud and steel slag according to the ratio in Table 1 to obtain a composite cementitious material;

[0042] 2) mixing Bacillus colloidus, Bacillus subtilis and Bacillus acetic acid in a mass ratio of 2:1:1 to obtain a composite microorganism;

[0043] 3) According to the ratio in Table 1, add composite cementitious material, water, sand and composite microorganisms and mix thoroughly, stir evenly to obtain a slurry, then pour the slurry into a mold and vibrate to form it to obtain a test piece;

[0044] 4) Put the test piece in an environment with a relative humidity of 61% and a temperature of 18°C ​​for 30 hours to remove the mold to obtain a sample, place the sample in an environment with a relative humidity of 96% and a temperature of 21°C for standard curing for 4 days, and put it in a relative The red mud building m...

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