Magnesium silicate composite cementing material and preparation method thereof
A composite cementitious material and magnesium silicate technology, applied in the field of energy treatment and utilization, can solve the problems of lack of resource utilization, occupying precious land resources, and surrounding environmental pollution, so as to promote infrastructure construction, relieve increasing tension, and expand sources. and range effects
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example 1
[0058] A preparation method of magnesium silicate composite cementitious material, comprising the following steps:
[0059] (1) Drying and crushing the serpentine mineral processing tailings under a negative pressure of 1.8kpa to obtain powders mainly containing serpentine minerals with a particle size of 30 μm to 50 μm, said obtained mainly containing serpentine minerals The main mineral composition of raw material powder is serpentine, and it also contains a small amount of talc, magnetite, chlorite, magnesite, olivine and pyroxene.
[0060] The mass percentage of the main chemical composition of the powder is: MgO 26%, SiO 2 39%, CaO 10%, Fe 2 o 3 14%, Al 2 o 3 2%, H 2 o + 7%.
[0061] (2) Put the powder mainly containing serpentine mineral raw material obtained in step 1 into a calciner for 60 min at 650° C. to obtain active magnesium silicate powder.
[0062] (3) Combine the active magnesium silicate powder obtained in step 2 with quicklime powder, and mix them ...
example 2
[0065] A preparation method of magnesium silicate composite cementitious material, comprising the following steps:
[0066] (1) Serpentine dressing tailings are dried and crushed under a negative pressure of 2.0kpa to obtain powders mainly containing serpentine minerals with a particle size of 10 μm to 30 μm, the obtained mainly containing serpentine minerals The main mineral composition of raw material powder is serpentine, and it also contains a small amount of talc, magnetite, chlorite, magnesite, olivine and pyroxene.
[0067] The mass percentage of the main chemical composition of the powder is: MgO 39%, SiO 2 35%, CaO5%, Fe 2 o 3 7%, Al 2 o 3 3%, H 2 o + 9%.
[0068] (2) Put the powder mainly containing serpentine mineral raw material obtained in step 1 into a calciner for 10 min at 850° C. to obtain active magnesium silicate powder.
[0069] (3) Combine the active magnesium silicate powder obtained in step 2 with phosphoric acid, and mix them uniformly at a ma...
example 3
[0072] A preparation method of magnesium silicate composite cementitious material, comprising the following steps:
[0073] (1) Drying and crushing the serpentine mineral processing tailings under a negative pressure of 2.2kpa to obtain a powder mainly containing serpentine minerals with a particle size of 50 μm to 75 μm, said obtained mainly containing serpentine minerals The main mineral composition of raw material powder is serpentine, and it also contains a small amount of talc, magnetite, chlorite, magnesite, olivine and pyroxene.
[0074] The mass percentage of the main chemical composition of the powder is: MgO 29%, SiO 2 38%, CaO8%, Fe 2 o 3 9%, Al 2 o 3 5%, H 2 o + 9%.
[0075] (2) Put the powder mainly containing serpentine mineral raw material obtained in step 1 into a calciner for 30 min at 750° C. to obtain active magnesium silicate powder.
[0076] (3) Combine the active magnesium silicate powder obtained in step 2 with the plaster of paris, and mix the...
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Abstract
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