Modified red mud-based building block and preparation method thereof
A technology of red mud and blocks, which is applied in the field of modified red mud-based blocks and its preparation, can solve the problems of cost, land occupation, environmental and safety hazards, etc., and achieve the effect of broad application prospects
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Embodiment 1
[0038] The preparation method of the modified red mud base block in this example comprises the following steps:
[0039] 1) Calcination pretreatment of red mud
[0040] The red mud was put into a rotary calciner and calcined at a temperature of 700°C for 12 hours.
[0041] 2) Red mud powder preparation
[0042] The calcined red mud in step 1) is naturally cooled to room temperature in the air, and then sent to a planetary ball mill for ball milling to obtain a powder material with a particle size of 100-200 mesh.
[0043] 3) Preparation of batch materials
[0044] Add the red mud powder, clay, fly ash, dihydrate gypsum, Glauber's salt, sodium silicate and P.O 42.5 grade cement in step 2) into a closed planetary mixer, and stir and mix for 30 minutes to make it fully mixed evenly. A red mud-based batch material is obtained. Among them, the mass ratio of each raw material is: red mud powder accounts for 30%, clay accounts for 15%, fly ash accounts for 25%, dihydrate gypsum a...
Embodiment 2
[0050] The preparation method of the modified red mud base block in this example comprises the following steps:
[0051] 1) Calcination pretreatment of red mud
[0052] The red mud was put into a rotary calciner and calcined at a temperature of 800° C. for 15 hours.
[0053] 2) Red mud powder preparation
[0054] The calcined red mud in step 1) is naturally cooled to room temperature in the air, and then sent to a planetary ball mill for ball milling to obtain a powder material with a particle size of 100-200 mesh.
[0055] 3) Preparation of batch materials
[0056] Add the red mud powder, clay, fly ash, dihydrate gypsum, Glauber's salt, sodium silicate and P.O 42.5 grade cement in step 2) into a closed planetary mixer, and stir and mix for 30 minutes to make it fully mixed evenly. A red mud-based batch material is obtained. Among them, the mass ratio of each raw material is: red mud powder accounts for 35%, clay accounts for 12%, fly ash accounts for 15%, dihydrate gypsum...
Embodiment 3
[0062] The preparation method of the modified red mud base block in this example comprises the following steps:
[0063] 1) Calcination pretreatment of red mud
[0064] The red mud was put into a rotary calciner and calcined at a temperature of 850° C. for 16 hours.
[0065] 2) Red mud powder preparation
[0066] The calcined red mud in step 1) is naturally cooled to room temperature in the air, and then sent to a planetary ball mill for ball milling to obtain a powder material with a particle size of 100-200 mesh.
[0067] 3) Preparation of batch materials
[0068] Add the red mud powder, clay, fly ash, dihydrate gypsum, Glauber's salt, sodium silicate and P.O 42.5 grade cement in step 2) into a closed planetary mixer, and stir and mix for 30 minutes to make it fully mixed evenly. A red mud-based batch material is obtained. Among them, the mass ratio of each raw material is: red mud powder accounts for 40%, clay accounts for 8%, fly ash accounts for 20%, dihydrate gypsum ...
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