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
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[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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