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Method for producing silicate clinker by using coal gangue instead of tailings and silicon-aluminum raw materials

A technology of silico-alumina raw material and silicate clinker, applied in cement production and other directions, can solve problems affecting clinker production quality, energy consumption, etc.

Inactive Publication Date: 2020-09-29
长沙紫宸科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can effectively solve the problem that the clinker production quality and energy consumption are affected by the crust sticking and plugging caused by the characteristics of raw coal gangue.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] In this example, the coal gangue is taken from the piled gangue hill. It is a mixture of white gangue and selected gangue. According to the sampling procedure, 100 gangue samples are taken for analysis. The appearance and analysis of the gangue samples show that the gangue composition fluctuates very widely. The internal water content (w) of coal gangue fluctuates between 0.2% and 5.2%, and the external water content (w) fluctuates between 4.3 and 11.6%. The industrial analysis value fluctuates in: ash content (Aad) 59.7-91.3%, volatile matter (Vad) 2.6-21.4%, moisture (Mad) 0.2-6.4%, fixed carbon (FCad) 1.1-18.3%, calorific value (Qnet) .ad) 187~2373 ×4.18 kJ / kg. The main chemical composition (w) fluctuation range is SiO 2 43.8~67.6%, A1 2 O 3 7.3~21.7%, Fe 2 O 3 3.4~9.1%, CaO 1.3~8.4%, MgO 0.7~4.8%, K 2 O 0.8~2.7%, Na 2 O 0.6~1.8%, SO 3 0.3~3.7%, P 2 O 5 0.00~0.16%, TiO 2 0.00~0.71%, loss on ignition (Loss) 6.7~27.3%.

[0066] After repeated analysis and evaluatio...

Embodiment 2

[0078] In this example, coal gangue is selected from coal gangue discharged from coal mining operations and transported directly from the coal mine to the factory. 40 gangue samples are taken for analysis according to the sampling procedure. The industrial analysis value of coal gangue fluctuates: ash (Aad) 69.6~ 88.7%, volatile matter (Vad) 4.6~17.3%, moisture (Mad) 1.0~4.7%, fixed carbon (FCad) 2.8~15.3%, calorific value (Qnet.ad) 487~2253×4.18 kJ / kg. The main chemical composition (w) fluctuation range is SiO 2 49.7~65.4%, A1 2 O 3 7.9~19.4%, Fe 2 O 3 3.3~8.4%, CaO 1.7~8.1%, MgO 0.6~3.9%, K 2 O 0.7~2.5%, Na 2 O 0.4~1.5%, SO 3 0.5~4.7%, P 2 O 5 0.00~0.13%, TiO 2 0.00~0.56%, loss on ignition (Loss) 8.2~29.1%. The coal gangue modified sintering aid used in the test was provided by Hunan Xiaoyin Wuji Environmental Energy Technology Development Co., Ltd. (Zc-R1 liquid agent), and the main component is a liquid mixture of oxidant, silica gel and aluminum glue.

[0079] After re...

Embodiment 3

[0091] In this example, coal gangue was selected from a coal washing plant and transported directly into the site. According to sampling procedures, 38 coal gangue samples were taken for analysis. The industrial analysis value of coal gangue samples fluctuates: ash (Aad) 71.3~89.7% , Volatile content (Vad) 3.7~16.4%, moisture (Mad) 0.94~5.3%, fixed carbon (FCad) 2.9~12.6%, calorific value (Qnet.ad) 287~1427×4.18kJ / kg. The main chemical composition (w) fluctuation range is SiO 2 47.9~65.3%, Al 2 O 3 6.8~18.2%, Fe 2 O 3 3.7~8.7%, CaO 1.6~8.4%, MgO 1.4~4.8%, K 2 O 0.8~2.1%, Na 2 O 0.5~1.4%, SO 3 1.6~3.7%, P 2 O 5 0.00~0.13%, TiO 2 0.00~0.57%, loss on ignition (Loss) 6.5~25.3%. The coal gangue modified sintering aid used for the test was provided by Hunan Xiaoyin Wuji Environmental Energy Technology Development Co., Ltd. (Zc-R liquid agent), and the main component is a liquid mixture of oxidant and aluminum glue.

[0092] After repeated analysis and evaluation with the cement pla...

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Abstract

The invention relates to a method for producing silicate clinker by using coal gangue instead of tailings and silicon-aluminum raw materials. The method comprises the following steps: (1) preparationof double-component powder; (2) preheating, mixing and decomposing; and (3) oxidizing calcination. According to the invention, the problems of influence on clinker production quality, energy consumption and the like due to crusting and sticking caused by the characteristics of raw coal gangue can be solved; and a large amount of raw coal gangue is consumed, and meanwhile, a part of tailings and silicon-aluminum raw materials used in dry cement produced are replaced, so the coal consumption of cement production and the consumption of clay (shale) type silicon-aluminum raw materials are reduced,and the problem of environmental pollution caused by coal gangue accumulation is solved.

Description

Technical field [0001] The invention relates to a production method of Portland cement clinker, in particular to a method for producing silicate clinker by using coal gangue to replace part of tail coal and silicoaluminous raw materials. Background technique [0002] Coal gangue is a black-gray gangue mineral that is formed by mixing organic and inorganic compounds deposited with coal during the process of crustal movement and coal formation. It is a coal-based sedimentary rock containing combustible materials that is interspersed in coal seams or in coal seam roofs or floors or interlayers. . Where there is coal, there is coal gangue. Coal gangue is the solid waste produced in the process of coal mining and washing, including rock road gangue, coal road gangue, natural gangue, washed gangue, hand-selected gangue and stripped gangue. class. According to the source of coal gangue, it can be divided into three categories: the first category is excavation gangue, that is, during t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/02C04B7/36C04B7/43C04B7/44
CPCC04B7/02C04B7/24C04B7/36C04B7/434C04B7/44Y02P40/10
Inventor 尹小林张新策
Owner 长沙紫宸科技开发有限公司
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