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Method for preparing coagulant from potassium-rich slate solid slag as raw material

A technology of potassium-rich slate and solid slag, which is applied in the field of resource utilization of industrial waste, can solve the problems of increasing operational difficulty and production costs, complex and cumbersome processes, and harsh preparation conditions, and achieves optimized preparation process steps, conditions, and processes The effect of simple and optimized preparation method

Inactive Publication Date: 2019-12-03
BAOTOU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that there is a need to use a strong oxidizing agent in the prior art in the preparation method of the polyaluminum ferric chloride coagulant, a stabilizer or an additional polymerization agent is required to complete the polymerization reaction, the process The steps need to be matured and adjusted by adding alkali, resulting in more energy consumption, complex and cumbersome process, unfriendly to the environment, harsh preparation conditions, and increased operation difficulty and production cost

Method used

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  • Method for preparing coagulant from potassium-rich slate solid slag as raw material
  • Method for preparing coagulant from potassium-rich slate solid slag as raw material
  • Method for preparing coagulant from potassium-rich slate solid slag as raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0066] Embodiment 1, the preparation of polyaluminum chloride ferric coagulant

[0067] Put 10 g of potassium-rich slate solid slag into a closed reaction kettle lined with polytetrafluoroethylene, add 30 mL of 20% HCl solution and mix evenly, and place the closed reaction kettle in an oven at 105°C for 2 hours to obtain a solid-liquid mixed reaction solution. After the reaction was completed, the temperature of the solid-liquid mixed reaction solution was lowered and 80 mL of water was added, stirred thoroughly, filtered and the filtrate was collected. Wash the filter cake with water 3 times, 25 mL each time, combine the washing liquid with the previous filtrate, add sodium hydroxide solution to adjust the pH to 3.5 at a controlled temperature of 10°C, and filter to remove the solid precipitate. The filtrate was heated up to 100°C for evaporation and concentration, and at the same time, the hydrolysis polymerization reaction was carried out for 10 hours. Then the material wa...

Embodiment 2

[0068] Embodiment 2, the preparation of polyaluminum chloride ferric coagulant

[0069] Put 10g of potassium-rich slate solid slag into a closed reaction kettle lined with polytetrafluoroethylene, add 40mL of 15% HCl solution and mix evenly, and place the closed reaction kettle in an oven at 80°C for 3 hours to obtain a solid-liquid mixed reaction solution. After the reaction is finished, cool down the solid-liquid mixed reaction solution and add 100 mL of water, stir well, filter and collect the filtrate. The filter cake was washed with 75mL of water, and the washing liquid was combined with the previous filtrate. Potassium hydroxide solution was added to adjust the pH to 4.0 at a controlled temperature of 18°C, and the solid precipitate was removed by filtration. The filtrate was heated to 90°C for evaporation and concentration, and at the same time, the hydrolysis polymerization reaction was carried out for 12 hours. Then the material was cooled and transferred to an oven ...

Embodiment 3

[0070] Embodiment 3, the preparation of polyaluminum chloride ferric coagulant

[0071] Put 10 g of potassium-rich slate solid slag into a closed reaction kettle lined with polytetrafluoroethylene, add 60 mL of 10% HCl solution and mix evenly, and place the closed reaction kettle in a 60°C oven for 5 hours to obtain a solid-liquid mixed reaction solution. After the reaction was completed, the temperature of the solid-liquid mixed reaction solution was lowered and 160 mL of water was added, stirred thoroughly, filtered and the filtrate was collected. Wash the filter cake with water 3 times, 25 mL each time, combine the washing liquid with the previous filtrate, add sodium hydroxide solution at a controlled temperature of 15°C to adjust the pH to 5, and filter to remove the solid precipitate. The filtrate was heated to 80°C for evaporation and concentration, and at the same time, the hydrolysis polymerization reaction was carried out for 6 hours. Subsequently, the material was ...

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Abstract

The invention discloses a method for preparing a polyaluminium ferric chloride coagulant from potassium-rich slate solid slag as a raw material. The method comprises the steps of mixing the potassium-rich slate solid slag with an HCl solution, and carrying out a heating reaction to obtain a solid-liquid mixed reaction solution; cooling the solid-liquid mixed reaction solution, adding water in thesolid-liquid mixed reaction solution in a certain proportion, carrying out stirring, filtering and washing, mixing filtrate washing solutions, and adding an alkaline solution to adjust the pH value tobe 2.5-5.0; and carrying out concentrating and hydrolytic polymerization, and carrying out drying and grinding to obtain the polyaluminium ferric chloride coagulant. According to the method for preparing the polyaluminium ferric chloride coagulant, the potassium-rich slate solid slag is used as the raw material, preparation process steps and conditions are optimized, the process is simple, conditions are mild and not harsh, the method is easy to operate, the energy consumption of production and the production cost are reduced, and application of environmentally friendly industrial productionis facilitated; and the prepared polyaluminium ferric chloride coagulant is good in quality, good in coagulation effect, wide in applicable pH range, multiple in application fields and good in applicability.

Description

technical field [0001] The invention relates to the technical field of resource utilization of industrial waste, in particular to a method for preparing a coagulant by using potassium-rich slate solid slag as a raw material. Background technique [0002] The Baiyan Obo potassium-rich slate is a polymetallic paragenetic ore, not only a large iron-niobium rare earth mine, but also rich in potassium, aluminum and other resources. The comprehensive and efficient utilization of potassium-rich slate is an important part of the sustainable development of mines. According to the mineral characteristics and chemical composition of potassium-rich slate, a large amount of solid slag is produced in the process of extracting potassium resources through the activation roasting-separation process, which has complex components, occupies a large area, and is difficult to store. [0003] Coagulants have excellent application effects in the treatment of printing and dyeing wastewater, high-tu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/5236
Inventor 谢慧芳曲虹霞陈守文姬俊梅吕莹李满年
Owner BAOTOU IRON & STEEL GRP
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