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A low-temperature preparation method of sulfosilicate-belite-sulfoaluminate cement

A technology of sulphoaluminate cement and sulphosilicate, which is applied in the field of materials, can solve problems such as high calcination temperature and complicated procedures, achieve low calcination temperature, low energy consumption, and solve environmental problems

Active Publication Date: 2021-07-13
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a low-temperature preparation method of sulfosilicate-belite-sulfoaluminate cement to solve the problems of high calcination temperature and complicated procedures in the prior art

Method used

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  • A low-temperature preparation method of sulfosilicate-belite-sulfoaluminate cement
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  • A low-temperature preparation method of sulfosilicate-belite-sulfoaluminate cement

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Effect test

preparation example Construction

[0026] A low-temperature preparation method of sulfosilicate-belite-sulfoaluminate cement of the present invention comprises the following steps:

[0027] (1) Put the raw materials into a planetary ball mill to mix and finely grind them; wherein, the raw materials include aluminum-silicon raw materials, aluminum raw materials, calcium raw materials, silicon raw materials, and industrial gypsum; the mass ratio of raw materials is: aluminum-silicon Raw materials: Aluminum raw materials: Calcium raw materials: Silicon raw materials: Industrial gypsum = 18.23~24.56: 6.09~23.76: 35.86~51.56: 11.23~12.47: 6.72~12.91; Among them, aluminum silicon raw materials waste aluminum silicate refractories , aluminum raw materials are bauxite, high alumina cement, CaO-Al 2 o 3 One of the base refining slags, the calcareous raw material is limestone, the silicon raw material is coal gangue, and the industrial gypsum is desulfurized gypsum and other industrial waste gypsum.

[0028] (2) Press ...

Embodiment 1

[0036] The ratio of raw materials is as shown in Table 2:

[0037] Table 2 Embodiment 1 raw material proportioning

[0038]

[0039] Specific steps are as follows:

[0040] 1) Mixing: Weigh the raw materials according to the mass ratio in Table 2, place them in a planetary ball mill, grind for 120min, and press them into cakes under a pressure of 6MPa;

[0041] 2) Calcination: place the product of step 1) in a high-temperature electric furnace, heat up to 700°C, keep it warm for 3 hours, and then cool it rapidly;

[0042] 3) Sieve: Grind until the particles can all pass through a square hole sieve with a pore size of 80 μm, and perform an XRD test, such as figure 1 .

Embodiment 2

[0044] The ratio of raw materials is as shown in Table 3:

[0045] Table 3 Embodiment 2 raw material proportioning

[0046]

[0047] Specific steps are as follows:

[0048] 1) Mixing: Weigh the raw materials according to the mass ratio in Table 3, place them in a planetary ball mill, grind for 60 minutes, and press them into cakes under a pressure of 6 MPa;

[0049] 2) Calcination: after crushing the cooled block sample, place it in a high-temperature furnace, calcine and keep it warm at 950°C for 2 hours, take it out for rapid cooling, and grind it in a ball mill to obtain sulphoaluminate cement clinker;

[0050] 3) Strength test: Mix and grind clinker and dihydrate gypsum to make cement, and perform 3d, 28d flexural, compressive, and flexural strength performance tests, as shown in Table 4.

[0051] Table 4 Example 2 Strength Performance Test

[0052]

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Abstract

The invention discloses a low-temperature preparation method of sulfosilicate-belite-sulfoaluminate cement, which comprises the following steps: (1) putting raw materials into a planetary ball mill, mixing and grinding; wherein, the raw materials include aluminum Silicon raw materials, aluminum raw materials, calcium raw materials, silicon raw materials, industrial gypsum; (2) press the raw materials mixed in step (1) into cakes, place them in a high-temperature electric furnace, and calcinate at a temperature of 700°C-1200°C, Then take out the rapid cooling; (3) grind the product obtained in step (2); (4) mix and grind the product obtained in step (3) with dihydrate gypsum to make cement. The present invention directly utilizes the common wastes containing the intermediate product phase calcium-aluminum feldspar and other aluminates as raw materials, and the raw materials do not need to be modified or treated in other ways, and the utilization rate of the raw materials is improved while saving the processing cost. The initial cost is greatly reduced, and the environmental problems caused by industrial waste residues are solved at the same time.

Description

technical field [0001] The invention belongs to the field of material technology, and in particular relates to a method for preparing sulfosilicate-belite-sulfoaluminate cement clinker by using an intermediate product at low temperature and a product thereof. Background technique [0002] As the most widely used building material, cement plays an important role in the progress of human society and social and economic development, but it also produces high energy and resource consumption and greenhouse gas emissions. Calcium sulfoaluminate makes sulfoaluminate cement have high early strength and high late strength, and has the advantages of impermeability, frost resistance, and corrosion resistance; at the same time, calcium sulfoaluminate has a high hydration activity and can form a large amount of calcium in the early stage. Alumite (AFt), C-S-H and aluminum hydroxide (AH 3 ) gel, so that the early strength of cement is greatly improved. [0003] Calcium sulfosilicate min...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/32
CPCC04B7/32Y02P40/10
Inventor 郭伟王枭陈佳彬何梓清
Owner YANCHENG INST OF TECH
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