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FBC (fluidized bed combustion) ash containing cement and preparation method thereof

A technology of sulfur-fixing ash and cement, applied in cement production and other directions, can solve problems such as pollution, increase the use of sulfur-fixing ash and cement production cost, and achieve the effects of reducing environmental pollution, reducing production costs, and reducing the amount of use

Active Publication Date: 2015-12-30
山西中科赛德能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above technical problems, the object of the present invention is to provide a sulfur-fixed ash cement and a preparation method thereof, which can increase the amount of sulfur-fixed ash in cement to reduce the production cost of cement, and at the same time solve the problem of a large amount of sulfur-fixed ash pollution problems

Method used

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  • FBC (fluidized bed combustion) ash containing cement and preparation method thereof
  • FBC (fluidized bed combustion) ash containing cement and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A sulfur-fixing ash cement is prepared from the following raw materials in parts by weight: 30 parts of sulfur-fixing ash, 66 parts of 52.5 ordinary Portland cement clinker, and 4 parts of desulfurized gypsum.

[0025] The production method of the sulfur-fixed ash used in the sulfur-fixed ash cement comprises the following steps:

[0026] Step 1, 50 parts of calcium oxide, 10 parts of zinc slag, 2 parts of copper slag, 4 parts of activator calcium fluoride, stabilizer Al 2 o 3 1 part, 1 part of the activator calcium sulfoaluminate is added to a ball mill and mixed, and the powder of 0.1-5mm (1.5mm accounts for 10%) powder is obtained by ball milling. Product sulfur fixative.

[0027] Among them, CaO15wt% in zinc slag, SiO 2 20wt%, FeO5wt%, Fe 2 o 3 20wt% and ZnO5wt%; Fe in copper slag 2 o 3 20wt%, SiO 2 30wt%, CaO5wt% and Al 2 o 3 2wt%.

[0028] In step 2, the coal and the sulfur-fixing agent accounting for 10% of the weight of the coal are transported to the...

Embodiment 2

[0033] A sulfur-fixing ash cement is prepared from the following raw materials in parts by weight: 50 parts of sulfur-fixing ash, 46 parts of 52.5 ordinary Portland cement clinker, and 4 parts of desulfurized gypsum.

[0034] The production method of the sulfur-fixed ash used in the sulfur-fixed ash cement comprises the following steps:

[0035] Step 1, 55 parts of calcium oxide, 12 parts of zinc slag, 2.2 parts of copper slag, 5 parts of activator calcium fluoride, stabilizer SiO 2 2 parts, 1.1 parts of activator calcium sulfoaluminate are added into a ball mill and mixed, ball milled into a powder of 0.1-5mm (1.5mm accounts for 5%) powder, and stands for 10h, that is Product sulfur fixative.

[0036] Among them, CaO11wt% in zinc slag, SiO 2 23wt%, FeO5wt%, Fe 2 o 3 18wt% and ZnO2wt%; Fe in copper slag 2 o 3 27wt%, SiO 2 35wt%, CaO6wt%, Al 2 o 3 3wt%.

[0037] In step 2, the coal and the sulfur-fixing agent accounting for 7% of the coal-fired weight are transported ...

Embodiment 3

[0042] A sulfur-fixing ash cement is prepared from the following raw materials in parts by weight: 40 parts of sulfur-fixing ash, 55 parts of 52.5 ordinary Portland cement clinker, and 5 parts of desulfurized gypsum.

[0043] The production method of the sulfur-fixed ash used in the sulfur-fixed ash cement comprises the following steps:

[0044]Step 1, 61 parts of calcium oxide, 15 parts of zinc slag, 2.6 parts of copper slag, 5.2 parts of activator calcium fluoride, stabilizer SiO 2 1.2 parts and Al 2 o 3 1.2 parts, 1.5 parts of activator calcium sulfoaluminate are added into ball mill and mixed, ball milled into powder of 0.1~5mm (1.5mm accounts for 10%) powder, stands still for 8 hours, that is Product sulfur fixative.

[0045] Among them, CaO12wt% in zinc slag, SiO 2 21wt%, FeO6wt%, Fe 2 o 3 21wt% and ZnO3wt%; Fe in copper slag 2 o 3 30wt%, SiO 2 38wt%, CaO7wt% and Al 2 o 3 2wt%.

[0046] In step 2, the coal and the sulfur-fixing agent accounting for 8% of the ...

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Abstract

The invention discloses FBC ((fluidized bed combustion) ash containing cement and a preparation method thereof. The FBC ash cement comprises raw materials in parts by weight as follows: 30-50 parts of FBC ashes, 46-66 parts of cement clinker and 2-5 parts of flue gas desulfurization gypsum. According to the FBC ash containing cement, a sulfur-fixing agent comprising calcium oxide, zinc residues, copper residues, an activating agent, a stabilizer and an exciting agent is added to a circulating fluidized bed boiler in the coal combustion process, the utilization rate of the FBC ashes in the cement can be increased by improving the ingredient of the sulfur-fixing agent, the additional value of the FBC ashes can be increased, the production cost of the cement is reduced, and environmental pollution is reduced.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a sulfur-fixed ash cement and a preparation method thereof. Background technique [0002] In recent years, the output of raw coal in my country is 3.5 billion tons. With the large-scale use of coal resources in industries such as thermal power plants, steelmaking plants, and boiler plants, the cinder after coal combustion has become the industry with the largest annual emissions and cumulative stacking volume in China. For waste, taking a 135MW coal-fired fluidized bed boiler as an example, the annual sulfur-fixing ash is about 2 million tons; and most enterprises cannot effectively deal with the cinder due to limited technology, so they adopt the method of open-air stacking, which not only takes up a lot of land and pollute the ecological environment. Therefore, the comprehensive utilization of coal ash is an urgent task. In the prior art, sulfur-fixed ash can be app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/28
CPCY02P40/10
Inventor 王成丁子文张保森
Owner 山西中科赛德能源科技有限公司
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