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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

Active Publication Date: 2021-12-21
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
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Problems solved by technology

[0003] In addition, a large amount of solid waste containing serpentine in China can only be stockpiled and processed due to the lack of effective resource utilization methods. While occupying valuable land resources, it also has potential pollution to the surrounding environment

Method used

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Examples

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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

The invention provides a magnesium silicate composite cementing material and a preparation method thereof. The preparation method comprises the following steps: drying, crushing and crushing raw materials containing serpentine minerals to obtain powder containing the serpentine minerals; calcining the powder containing the serpentine minerals to obtain active magnesium silicate powder; and matching the active magnesium silicate powder with an auxiliary agent to obtain the magnesium silicate composite gel material. The magnesium silicate composite cementing material comprises the product prepared according to the method. According to the invention, the use amount of cement can be reduced, carbon emission and environmental pollution can be reduced, resource utilization of the serpentine mineral-containing solid waste is realized, and the source and range of the cementing material are expanded.

Description

technical field [0001] The invention relates to the field of energy processing and utilization, in particular to a magnesium silicate composite gelling material and a preparation method thereof. Background technique [0002] At present, the main active components of inorganic cementitious materials used in China, such as cement, lime and gypsum, are calcareous cementitious materials. Regardless of cement or lime, a large amount of CO will be generated during the production process 2 , in today's increasingly serious greenhouse effect, how to reduce carbon emissions and achieve carbon neutrality has become a major issue that needs to be considered at the national level. [0003] In addition, a large amount of serpentine-containing solid waste in China can only be stockpiled and disposed of due to the lack of effective resource recovery methods. While occupying valuable land resources, it also has potential pollution to the surrounding environment. [0004] Therefore, it is ...

Claims

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Application Information

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IPC IPC(8): C04B9/20C04B9/06C04B9/04C04B9/02
CPCC04B9/20C04B9/06C04B9/04C04B9/02Y02P40/10
Inventor 彭同江罗利明孙红娟唐颂
Owner SOUTHWEAT UNIV OF SCI & TECH
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