Method for preparing water purifying agent through waste gangue slag and use method of water purifying agent

A technology of water purifying agent and coal gangue, which is applied in the coal field, can solve the problems of low utilization rate and high cost of slag, and achieve the effects of improving utilization rate, low cost and low production cost

Inactive Publication Date: 2014-04-23
CHINA COAL ENERGY HEILONGJIANG COAL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of low utilization rate of slag produced by coal gangue boilers and high cost of

Method used

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  • Method for preparing water purifying agent through waste gangue slag and use method of water purifying agent
  • Method for preparing water purifying agent through waste gangue slag and use method of water purifying agent

Examples

Experimental program
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Effect test

Example Embodiment

[0021] Embodiment 1: A method of utilizing waste coal gangue slag to prepare water purifying agent in this embodiment is carried out according to the following steps:

[0022] 1. Preheat the reaction vessel to a temperature of 40-50 °C, then add the coal gangue slag into the reaction vessel, and then add hydrochloric acid with a mass fraction of 10% to 20% to the reaction vessel, and then within 30min, the reaction vessel is replaced by The temperature is 40-50°C and the temperature is 75-85°C. During the heating process, the liquid in the reaction vessel is kept from boiling, and then the reaction is carried out at a temperature of 75-85°C for 1h-2h, and the heating is stopped to obtain a reaction solution. Let stand for 50min-70min, and then carry out pressure filtration under normal pressure to obtain a supernatant; the mass ratio of coal gangue slag and hydrochloric acid described in step 1 is 5:(6-8);

[0023] 2. Pour the supernatant obtained in step 1 into the polymeriza...

Example Embodiment

[0027] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the reaction vessel is preheated to a temperature of 45°C, then the coal gangue slag is added to the reaction vessel, and then the mass fraction added to the reaction vessel is 10%~20% hydrochloric acid, then heat the reaction vessel from 45℃ to 80℃ within 30min, keep the liquid in the reaction vessel from boiling during the heating process, and then react at 80℃ for 1h~2h, Heating was stopped to obtain a reaction solution, which was allowed to stand for 60 min. Other steps and parameters are the same as in the first embodiment.

Example Embodiment

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass ratio of coal gangue slag and hydrochloric acid described in step 1 is 5:7. Other steps and parameters are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a water purifying agent through waste gangue slag and a use method of the water purifying agent. The invention relates to the field of coal, in particular relates to the method for preparing the water purifying agent through the waste gangue slag and the use method of the water purifying agent, and aims to solve the problems of low slag utilization rate of a gangue boiler and high cost of a method for producing the water purifying agent through fly ash. The method for preparing the water purifying agent comprises the following steps: (1) preheating a reaction container, and adding gangue slag and hydrochloric acid to prepare a supernatant reaction solution; (2) adding calcium aluminate powder, and performing polymerization reaction to obtain water purifying agent liquid; (3) performing spray drying or roller drying on the water purifying agent liquid obtained in the step (2) to obtain the solid water purifying agent. The use method comprises the following step: directly using the water purifying agent liquid which serves as the water purifying agent, or dissolving the solid water purifying agent in water and then using the dissolved solid water purifying agent as the water purifying agent. According to the method for preparing the water purifying agent, the utilization rate of the gangue slag and industrial waste acid is improved, the quantity of equipment is small, and after-treatment of wastes is simple.

Description

technical field [0001] The invention relates to the field of coal, in particular to a method for preparing a water purifying agent by using waste coal gangue slag and a method for using the water purifying agent. Background technique [0002] In the process of establishing a "resource-saving and environment-friendly" society in an all-round way in my country, coal enterprises use coal gangue as the raw material for boiler combustion to produce steam and generate electricity, which improves the utilization rate of coal gangue. Slag is a new industrial solid waste. The reuse of coal gangue boiler slag is a new economic growth point. Change the single production mode mainly based on coal mining, correctly understand the significance of environmental protection, and actively take measures Control environmental pollution, enhance the competitiveness of enterprises, obtain good economic, social and environmental benefits, and then realize the sustainable development of mining areas....

Claims

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Application Information

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IPC IPC(8): C02F1/52B09B3/00
Inventor 曲全利曹殿春高洪峰于志坚张怀滨姚再顺张萌
Owner CHINA COAL ENERGY HEILONGJIANG COAL CHEM
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