Sulphoaluminate cement and preparation method thereof

A technology of sulfoaluminate cement and calcium sulfosilicate, which is applied in the field of cement preparation, can solve problems such as harmful minerals, achieve high early strength, simple preparation, and reduce consumption

Inactive Publication Date: 2015-05-13
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the prior art, the general view is that calcium su

Method used

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  • Sulphoaluminate cement and preparation method thereof

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Example Embodiment

[0032] Example 1:

[0033] A method for preparing sulfoaluminate cement containing calcium sulfosilicate mineral, the specific implementation steps are as follows:

[0034] a. Preparation of cement raw meal:

[0035] 56 parts by mass of limestone, 27 parts by mass of alumina, and 17 parts by mass of phosphogypsum, and then all the components are ground together to a fineness of 100-200 mesh to obtain raw material ingredients.

[0036] b. Preparation of cement clinker:

[0037] Place the raw meal prepared in step a in a rotary kiln for the first calcination, control the calcination temperature to 1350°C and the calcination time to 30min to obtain cement clinker; then calcinate the clinker again, and control the calcination temperature to 1200°C for holding time It is 60 minutes; the clinker is cooled by a castor-type cooler to obtain sulfoaluminate cement clinker containing calcium sulfosilicate minerals.

[0038] c. Preparation of cement:

[0039] Add 5 parts by mass of natural dihydrate...

Example Embodiment

[0042] Example 2:

[0043] A preparation method for producing sulfoaluminate cement containing calcium sulfosilicate mineral by adopting a secondary calcination process, the specific implementation steps are as follows:

[0044] a. Preparation of cement raw meal:

[0045] 55 parts by mass of limestone, 20 parts by mass of bauxite, 5 parts by mass of sandstone, and 20 parts by mass of phosphogypsum, and then each component is ground and mixed to a fineness of 100-200 meshes to obtain raw material ingredients.

[0046] b. Preparation of cement clinker:

[0047] Place the raw meal prepared in step a in a rotary kiln for the first calcination, control the calcination temperature to 1300 ℃ and the calcination time to 30 minutes to obtain cement clinker, and then calcinate the clinker again to control the calcination temperature to 1150 ℃ for heat preservation For 120 minutes, the clinker is cooled by a castor-type cooler to obtain sulfoaluminate cement clinker.

[0048] c. Preparation of ce...

Example Embodiment

[0051] Example 3:

[0052] A kind of preparation method that adopts secondary calcination process to produce the sulfoaluminate cement containing calcium sulfosilicate mineral, concrete implementation steps are as follows:

[0053] a. Preparation of cement raw meal: 50 parts by mass of limestone, 30 parts by mass of electrolytic manganese slag, and 20 parts by mass of bauxite, and then each component is ground to a fineness of 100-200 mesh to obtain raw material ingredients.

[0054] b. Preparation of cement clinker:

[0055] Place the raw meal prepared in step a in a rotary kiln for the first calcination, control the calcination temperature to 1350°C and the calcination time to 30min to obtain cement clinker, and then calcinate the clinker again to control the calcination temperature to 1220°C for heat preservation For 120 minutes, the clinker is cooled by a castor-type cooler to obtain sulphoaluminate cement.

[0056] c. Preparation of cement:

[0057] Add 5 parts by mass of natural...

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Abstract

The invention discloses sulphoaluminate cement. The sulphoaluminate cement is characterized by containing 5%-35% by mass of calcium sulphosilicate mineral. The invention further discloses a preparation method of the sulphoaluminate cement. The preparation method is characterized in that the fired clinker contains calcium sulphosilicate, and comprises the following steps of firstly, calcining a raw material according to a proper calcination process in preparation; carrying out secondary calcination according to the set calcination temperature and heat preservation time; and grinding secondarily calcined cement clinker and additive gypsum to prepare the sulphoaluminate cement. The sulphoaluminate cement is simple to prepare, convenient to implement and low in cost; the later strength shrinkage problem of the sulphoaluminate cement can be improved; meanwhile, the calcium sulphate content can be improved; the silicate waste residues with high calcium sulphate content are digested; and the production and application ranges of the sulphoaluminate cement are expanded.

Description

technical field [0001] The invention relates to the technical field of cement preparation; in particular, it relates to a sulphoaluminate cement and a preparation method thereof. Background technique [0002] When cement concrete is being poured, how to ensure and improve its later strength to ensure the strength of the final component has been the focus of attention and research by those skilled in the art. In particular, some special cements with low strength in the later stage, such as sulfoaluminate cement, have high early strength, excellent frost resistance, impermeability, corrosion resistance and other durability, and are used in negative temperature construction, underground, rapid repair projects and In industries such as prefabricated products, the lack of strength in the later stage, especially the shrinkage of the flexural strength in the later stage, requires continuous improvement and perfection. At the same time, as a special cement, sulfoaluminate cement re...

Claims

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Application Information

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IPC IPC(8): C04B7/32
Inventor 钱觉时孙化强沈燕余金城刘娜黄永波
Owner CHONGQING UNIV
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