Green and environment-friendly cement and preparation method thereof

A green and environmentally friendly cement and cement clinker technology, which is applied in the field of cement manufacturing, can solve the problems of complex components and weak effects, and achieve the effects of promoting sintering reaction, improving the utilization of waste materials, and reducing costs

Active Publication Date: 2020-06-12
JIAXIAN ZHONGLIAN TIANGUANG CEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, many industrial solid wastes have complex components, some components can play an important role in the cement clinker firing process, and some components have relatively weak effects

Method used

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  • Green and environment-friendly cement and preparation method thereof

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preparation example Construction

[0045] The preparation method of the green environmental protection cement of the present invention comprises the following steps: 1) mixing and grinding the raw materials of cement clinker to obtain raw meal, then preheating and decomposing the raw meal, and then sintering at 1350-1450°C for 20- 30 minutes, rapid cooling to obtain cement clinker; 2) mixing and grinding the cement clinker prepared in step 1) with the admixture material to obtain final product.

[0046] In step 1), mixing and grinding the raw materials of cement clinker is to uniformly mix limestone, sandstone, sulfuric acid slag, coal gangue, and iron slag to obtain a premix, and then powder the premix to obtain raw meal. Specifically, the limestone crushed material, coal gangue crushed material and sandstone are mixed to obtain the first mixed material; the sulfuric acid slag and iron ore slag are mixed uniformly to obtain the second mixed material, and then the first mixed material and the second mixed materi...

Embodiment 1

[0052] The green environmental protection cement of this embodiment is made by mixing cement clinker and admixture according to the weight ratio of 70:30. The cement clinker is made from the following raw materials: limestone 155.0kg, sandstone 13.0kg, sulfuric acid slag 4.0kg, coal gangue 8.0kg, iron slag 3.0kg. The mixed material is composed of limestone, fly ash, desulfurized gypsum and iron slag in a weight ratio of 10:18:12:9.

[0053] Wherein, the mass percentage of CaO in limestone is 49.22%.

[0054] The preparation method of the green environment-friendly cement of the present embodiment comprises the steps:

[0055] 1) Pulverizing and screening the limestone to obtain limestone granules; pulverizing and sieving coal gangue to obtain coal gangue granules; then uniformly mixing the limestone granules, coal gangue granules and sandstone to obtain a mixture;

[0056] Mix sulfuric acid slag and iron ore slag evenly to obtain the second mixture;

[0057] Then the first ...

Embodiment 2

[0062] The green environmental protection cement of this embodiment is made by mixing cement clinker and admixture according to the weight ratio of 70:30. The cement clinker is made from the following raw materials: limestone 160.0kg, sandstone 13.5kg, sulfuric acid slag 4.5kg, coal gangue 9.0kg, iron ore slag 3.5kg, construction waste 15.0kg, barium slag 3.0kg. The mixed material is composed of limestone, fly ash, desulfurized gypsum and iron slag in a weight ratio of 10:18:12:9.

[0063] Wherein, the mass percentage of CaO in limestone is 49.22%.

[0064] The preparation method of the green environment-friendly cement of the present embodiment comprises the steps:

[0065] 1) Pulverizing and screening the limestone to obtain limestone granules; pulverizing and sieving coal gangue to obtain coal gangue granules; then uniformly mixing the limestone granules, coal gangue granules and sandstone to obtain the first mixture;

[0066] Mix sulfuric acid slag, iron ore slag, and ba...

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Abstract

The invention discloses green and environment-friendly cement and a preparation method thereof, and belongs to the technical field of cement manufacturing. The green and environment-friendly cement comprises cement clinker and an admixture, and the cement clinker is mainly prepared from, by weight, 150-160 parts of limestone, 13-15 parts of sandstone, 4-5 parts of sulfuric acid residue, 8-10 partsof coal gangue and 3-5 parts of iron-ore slag. The preparation method of the green and environment-friendly cement comprises the following steps: 1) mixing and grinding the raw materials of the cement clinker to prepare a raw material, preheating and decomposing the raw material, sintering at 1350-1450 DEG C for 20-30 min, and quenching to prepare the cement clinker; and 2) mixing and grinding the cement clinker prepared in step 1) and the admixture to obtain the green and environment-friendly cement. The green and environment-friendly cement utilizes sulfuric acid residue, iron-ore slag andthe like, improves the utilization degree of waste materials, is green and environment-friendly, and can also reduce the cost.

Description

technical field [0001] The invention relates to the technical field of cement manufacture, and more specifically relates to a green environmental protection cement and a preparation method thereof. Background technique [0002] With the comprehensive development of our country's infrastructure, the use of various building materials is increasing, and the use of cement materials is increasing day by day. In the production of cement, although many raw materials used are minerals with low economic value, they are also natural non-renewable resources, and the resource reserves will gradually decrease with the increase of resource usage. The use of industrial solid waste to replace or partially replace raw materials for cement production has become a sustainable production method and can also reduce production costs. [0003] However, many industrial solid wastes have complex components, some components can play an important role in the cement clinker firing process, and some co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/24C04B7/147
CPCC04B7/26C04B7/246C04B7/24C04B7/147Y02P40/10
Inventor 李俊周赵红俊张其山吴旭伟荆永卫
Owner JIAXIAN ZHONGLIAN TIANGUANG CEMENT CO LTD
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