Energy-saving cement and preparation method thereof

An energy-saving, cement-based technology, applied in the direction of cement production, etc., can solve problems such as consumption, high sintering temperature, and more energy, and achieve the effect of reducing the amount, reducing the sintering temperature, and improving the degree of reaction adequacy

Inactive Publication Date: 2020-05-26
DENGFENG SONGJI CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the use of more gypsum raw materials, more energy is consumed in the sintering process, resulting in a higher sintering temperature

Method used

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  • Energy-saving cement and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The energy-saving cement in this embodiment is made by mixing cement clinker and admixture according to the weight ratio of 93:7. The cement clinker is made from the following raw materials: 42.3t of power plant fly ash, 8.3t of bauxite, and 84.5t of limestone. t, gypsum 0.4t, iron ore 1.6t. The mixed material is composed of limestone powder, Class II fly ash, gypsum powder and converter slag powder in a weight ratio of 10.6:16.8:11.7:7.5. Wherein, power plant fly ash comprises the composition of following percentage by weight: 46.67% SiO 2 , 27.31% Al 2 o 3 , 5.89% Fe 2 o 3 , 3.27% CaO, 4.45% SO 3 , 0.8% MgO, 1.03% K 2 O. Al in bauxite 2 o 3 The weight percentage is 71.7%. Fe in iron ore 2 o 3 The calculated weight percentage is 39.23%. Converter slag includes the following components by weight: 48.32% CaO, 14.28% SiO 2 , 2.88% Al 2 o 3 , 8.99% Fe 2 o 3 , 8.79% MgO, 0.56% P 2 o 5 , 0.87% f-CaO.

[0045] The preparation technology of the energy-savi...

Embodiment 2

[0050] The energy-saving cement in this embodiment is made by mixing cement clinker and admixture according to the weight ratio of 88:12. The cement clinker is made from the following raw materials: 44.1t of power plant fly ash, 8.8t of bauxite, and 86.2t of limestone. t, gypsum 0.6t, iron ore 1.8t, clay 3.5t, metakaolin 12.5t. The mixed material is composed of limestone powder, Class II fly ash, gypsum powder and converter slag powder in a weight ratio of 10.6:16.8:11.7:7.5. Wherein, power plant fly ash comprises the composition of following percentage by weight: 46.67% SiO 2 , 27.31% Al 2 o 3 , 5.89% Fe 2 o 3 , 3.27% CaO, 4.45% SO 3 , 0.8% MgO, 1-1.3K 2 O. Al in bauxite 2 o 3 The weight percentage is 71.7%. Fe in iron ore 2 o 3 The calculated weight percentage is 39.23%. Converter slag includes the following components by weight: 48.32% CaO, 14.28% SiO 2 , 2.88% Al 2 o 3 , 8.99% Fe 2 o 3 , 8.79% MgO, 0.56% P 2 o 5 , 0.87% f-CaO. Al in clay 2 o 3 The we...

Embodiment 3

[0056] The energy-saving cement in this embodiment is made by mixing cement clinker and admixture according to the weight ratio of 85:15. The cement clinker is made from the following raw materials: 43.5t of power plant fly ash, 9.2t of bauxite, and 91.7t of limestone. t, gypsum 0.8t, iron ore 2.2t, clay 4.5t, metakaolin 11.0t, zinc oxide 2.8t, fluorite 0.5t, barium slag 1.2t. The mixed material is composed of limestone powder, Class II fly ash, gypsum powder and converter slag powder in a weight ratio of 10.6:16.8:11.7:7.5. Wherein, power plant fly ash comprises the composition of following percentage by weight: 46.67% SiO 2 , 27.31% Al 2 o 3 , 5.89% Fe 2 o 3 , 3.27% CaO, 4.45% SO 3 , 0.8% MgO, 1-1.3K 2 O. Al in bauxite 2 o 3 The weight percentage is 71.7%. Fe in iron ore 2 o 3 The calculated weight percentage is 39.23%. Converter slag includes the following components by weight: 48.32% CaO, 14.28% SiO 2 , 2.88% Al 2 o 3 , 8.99% Fe 2 o 3 , 8.79% MgO, 0.56% P...

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Abstract

The invention discloses energy-saving cement and a preparation method thereof, which belong to the technical field of cement production. The energy-saving cement comprises cement clinker and an admixture, wherein the cement clinker is mainly prepared from the following raw materials in parts by weight: 42-45 parts of power plant fly ash, 8-9.5 parts of bauxite, 80-98 parts of limestone, 0.3-2 parts of gypsum and 1.5-2.5 parts of iron ore. The preparation method of the energy-saving cement comprises the following steps of: 1) mixing and grinding the raw materials of the cement clinker to prepare a raw material, preheating and decomposing the raw material, sintering at 1050-1250 DEG C for 20-30 minutes, and cooling to prepare the cement clinker, and (2) mixing and grinding the cement clinkerprepared in the step (1) and the admixture to obtain the energy-saving cement. The raw materials of the cement clinker of the energy-saving cement cooperate with each other, so that the sintering temperature is reduced, and the energy is saved.

Description

technical field [0001] The invention relates to the technical field of cement production, and more specifically relates to an energy-saving cement and a preparation method thereof. Background technique [0002] As one of the three major building materials, cement plays an increasingly important role in the process of urbanization and promotes the process of economic development. However, the extensive use of cement also brings unavoidable environmental pollution and energy consumption problems. [0003] Traditional Portland cement uses limestone as the main raw material and is calcined at 1450°C to form tricalcium silicate, tricalcium aluminate, dicalcium silicate and tetracalcium aluminoferrite. Due to the high sintering temperature and high energy consumption, it was once regarded as an industry with backward production capacity. [0004] With the continuous adjustment of industrial policies, the dry production of sulfur (iron) aluminate cement is listed as an encouraged...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/22C04B7/42C04B7/43
CPCC04B7/243C04B7/22C04B7/427C04B7/424C04B7/475Y02P40/10
Inventor 屈文凯李焕杰刘超卫
Owner DENGFENG SONGJI CEMENT
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