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Method for producing silicate clinker by replacing silicon-aluminum raw material ingredients with modified coal gangue

A technology of silica-alumina raw materials and silicate clinker, which is applied in cement production and other directions, can solve problems affecting the stability of kiln system working conditions, crust sticking and clogging, etc., so as to solve the stubborn problem of crust sticking and clogging, and eliminate elemental sulfur The effect of steam generation and consumption reduction

Inactive Publication Date: 2020-09-25
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

[0033] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art, and to provide a method to solve the problems caused by the characteristics of raw coal gangue, such as serious crust sticking in the kiln system and affecting the stability of the kiln system, so that A method of producing silicate clinker by using modified coal gangue instead of silicon-aluminum raw material ingredients for cement enterprises to consume coal gangue on a large scale and resolve environmental pollution problems caused by coal gangue accumulation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The coal gangue used in this embodiment is obtained from various types of coal gangue piled up in a certain coal gangue hill, which were originally mixed with white gangue and selected gangue, and crushed and homogenized. Analysis by the factory laboratory: the average value (w) of homogenized coal gangue industrial analysis is: ash (Aad) 76.84%, volatile matter (Vad) 15.31%, moisture (Mad) 1.46%, fixed carbon (FCad) 6.39 %, calorific value (Qnet.ad) 683×4.18 kJ / kg. The average value of the main chemical composition (w) of homogenized coal gangue is SiO 2 54.03%, A1 2 o 3 12.35%, Fe 2 0 3 4.18%, CaO4.91%, MgO1.53%, K 2 O 0.8~2.7%, Na 2 O 0.6~1.8%, SO 3 1.78%, P 2 o 5 0.01%, TiO 2 0.02%, loss on ignition (LoI) 22.71%.

[0053] This embodiment includes the following steps:

[0054] (1) Modification treatment of gangue: In the process of crushing and homogenizing treatment of gangue, a modified sintering aid equivalent to 0.5% of the mass of gangue is spra...

Embodiment 2

[0064] The coal gangue used in this example is selected from the selected gangue discharged from a coal mining operation in a coal mine. It is carbonatite coal gangue. It is directly transported from the coal mine to the factory for crushing and homogenization, and then enters the raw material warehouse. After analysis by the factory laboratory: homogenized coal The average value (w) of gangue industrial analysis is: Ash (Aad) 64.36%, Volatile (Vad) 18.38%, Moisture (Mad) 2.23%, Fixed Carbon (FCad) 16.03%, Calorific value (Qnet.ad)

[0065] 864 × 4.18 kJ / kg. The average value of the main chemical composition (w) of homogenized coal gangue is SiO 2 40.13%, A1 2 o 3 9.07%, Fe 2 o 3 3.31%, CaO 18.37%, MgO 4.13%, K 2 O 3.12%, Na 2 O 0.39%, SO 3 1.07%, P 2 o 5 0.01%, TiO 20.36%, loss on ignition (LoI) 19.79%. The Zc-R2 liquid modified sintering aid used in this example was purchased from Hunan Xiaoyin Wuji Environmental Energy Technology Development Co., Ltd., and its...

Embodiment 3

[0078] The coal gangue used in this embodiment is selected from the storage yard of a coal washing plant to wash gangue, which is aluminum rock gangue. Analysis by the factory laboratory: the average value (w) of homogenized coal gangue industrial analysis is: ash (Aad) 65.47%, volatile matter (Vad) 19.75%, moisture (Mad) 2.47%, fixed carbon (FCad) 12.31 %, calorific value (Qnet.ad) 647×4.18 kJ / kg. The average value of the main chemical composition (w) of homogenized coal gangue is SiO 2 44.86%, A1 2 o 3 37.32%, Fe 2 0 3 0.97%, CaO 0.11%, MgO 0.17%, K 2 O0.54%, Na 2 O 0.79%, SO 3 0.23%, P 2 o 5 0.00%, TiO 2 1.39%, loss on ignition (LoI) 14.61%. The modified sintering aid used in this example is the Zc-R3 liquid agent provided by Hunan Xiaoyin Wuji Environmental Energy Technology Development Co., Ltd. The main component is a liquid mixture of 65% oxidant ferrate solution and 35% liquid aluminum microcolloid .

[0079] This embodiment includes the following step...

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Abstract

The invention discloses a method for producing silicate clinker by replacing silicon-aluminum raw material ingredients with modified coal gangue. The method comprises the following steps of: (1) modifying coal gangue; (2) preparing raw material powder from the modified coal gangue instead of a silicon-aluminum raw material, and carrying out pre-decomposition; and (3) adjusting the use amount of tailings, oxidizing and calcining. According to the invention, the problem that the working condition stability of the kiln system is influenced by serious crusting and sticking of the kiln system due to the characteristics of the raw coal gangue can be solved, so that large-scale consumption of the coal gangue by cement enterprises is facilitated, 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 modified coal gangue instead of silicon-aluminum raw material ingredients. Background technique [0002] Coal gangue is solid waste produced during the process of coal mining, washing and processing, including rock gangue, coal gangue, natural gangue, washed gangue, hand-selected gangue and stripped gangue. [0003] According to the type of coal gangue resource utilization, it can be roughly divided into the following three categories: [0004] The first type is white gangue (stone), which is discharged from open-pit coal mining stripping and underground roadway excavation. It is characterized by low carbon content and mostly low calorific value. The calorific value of white gangue mostly fluctuates from 100 to 1200Kcal×4.18KJ / Kg, and there are many mineral components, according to the different mineral components...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/36C04B7/02C04B7/44
CPCC04B7/02C04B7/24C04B7/36C04B7/4407Y02P40/10
Inventor 尹小林张新策
Owner 长沙紫宸科技开发有限公司
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