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CN-119240893-B - Preparation method and application of mine water flocculation medicament with adsorption function

CN119240893BCN 119240893 BCN119240893 BCN 119240893BCN-119240893-B

Abstract

The invention relates to a preparation method and application of a mine water flocculation medicament with an adsorption function. The mine water flocculation medicament is prepared from raw materials including mineral materials, chitosan, water, silicate, acid, aluminum chloride salt, ferric chloride salt and polyacrylamide. The preparation method comprises the steps of heat-treating mineral materials, adding water and chitosan, adding silicate, reacting to generate polysilicic acid, grafting on chitosan macromolecules, adding aluminum chloride salt and ferric chloride salt, reacting, and finally adding polyacrylamide for aging. The mine water flocculation reagent provided by the invention can synchronously remove suspended matters, fluoride and COD, and has the advantages of low use dosage, short reaction time and high sedimentation speed.

Inventors

  • HAN SHAOKE
  • WANG DALONG
  • WANG YUCHEN
  • ZHANG WEI
  • WU FAN

Assignees

  • 中煤(北京)环保股份有限公司

Dates

Publication Date
20260512
Application Date
20241031

Claims (7)

  1. 1. The mine water flocculation medicament with the adsorption function is characterized by being prepared from raw material mineral materials, chitosan, water, silicate, acid, aluminum chloride salt, ferric chloride salt and polyacrylamide; according to the mass parts, the raw materials comprise 1-3 parts of mineral materials, 3-4 parts of chitosan, 5-10 parts of water, 8-18 parts of silicate, 5-10 parts of aluminum chloride salt and 5-10 parts of ferric chloride salt, and polyacrylamide accounts for 0.03-0.4% of the total mass of the raw materials; the mineral material is zeolite, porous clay or hydroxyapatite, and the particle size of the mineral material is 80-120 microns; The mine water flocculation medicament is prepared by the following steps: S1, heating a mineral material, wherein the heating is performed for 20-45 min at 300 ℃; s2, adding water and chitosan, mixing, and performing ultrasonic treatment to uniformly disperse the mineral material and the chitosan; S3, adding silicate solution into the mixture after ultrasonic treatment, stirring, adjusting the pH value to be acidic by acid, adding aluminum chloride salt and ferric chloride salt, and continuously stirring for reaction; S4, adding polyacrylamide into the mixture after the stirring reaction in the S3, stirring, and aging in a constant temperature oven; S5, taking out, filtering, air-drying and grinding after ageing to obtain the mine water flocculation reagent.
  2. 2. The mine water flocculation reagent of claim 1, wherein the silicate is sodium silicate or potassium silicate, and is first prepared into an aqueous solution with a mass concentration of 20-40% in use.
  3. 3. The mine water flocculation reagent of claim 1, wherein the aluminum chloride salt is polyaluminum chloride and the ferric chloride salt is polyaluminum chloride.
  4. 4. The mine water flocculation reagent of claim 1, wherein in the step S2, stirring is performed for 10-20 min, and the ultrasonic treatment is performed for 20-60 min under 28-40 KHz.
  5. 5. The mine water flocculation reagent of claim 1, wherein in the step S3, the acid is acetic acid or hydrochloric acid, the pH value is adjusted to 2.0-4.0, the stirring reaction time is 15-45 min, and the stirring speed is 50-250 rpm.
  6. 6. The mine water flocculation reagent of claim 1, wherein in the step S4, the stirring time is 5-15 min, and the aging condition is 20-28 h in a 20 ℃ incubator.
  7. 7. Use of the mine water flocculation reagent of any of claims 1-6 for fluoride removal and dissolved COD in mine water.

Description

Preparation method and application of mine water flocculation medicament with adsorption function Technical Field The invention relates to a preparation method and application of a mine water flocculation medicament with an adsorption function, and belongs to the technical field of mine water treatment. Background Mine water is a good choice as a water reserve source as an associated resource for coal mining. The conventional mine water treatment mainly aims at separating suspended matters, colloids and the like in mine water, and generally can reach the emission standard after PAC and PAM coagulant precipitation treatment is added, but the dosage of the medicament is large, and the sedimentation speed of the formed flocs is low. Along with the continuous improvement of the requirements of recycling and reutilizing water resources, pollutants such as fluoride, COD and the like in mine water become necessary conditions to be treated. However, fluoride and dissolved COD cannot be removed by conventional coagulant precipitation treatment of adding polyaluminium chloride (PAC) and Polyacrylamide (PAM), if fluoride and dissolved COD are to be removed, other treatment measures are required to be added, so that the early investment and system occupation of mine water treatment are increased sharply, and compared with the conventional coagulant precipitation agent, the method has the advantages of large dosage, long reaction period, poor treatment effect and large reaction equipment, and can also influence a subsequent treatment system. Disclosure of Invention First, the technical problem to be solved In order to solve the problems in the prior art, the invention provides a preparation method of a mine water flocculation medicament with an adsorption function, which has the effect of synchronously removing suspended matters, fluoride and COD, has low use amount, short reaction time and high sedimentation speed, and can effectively solve the problems in the prior art. (II) technical scheme In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps: the mine water flocculating agent with the adsorption function is prepared from the raw materials including mineral materials, chitosan, water, silicate, acid, aluminum chloride salt, ferric chloride salt and polyacrylamide. According to the mine water flocculation medicament, the raw materials comprise, by mass, 1-3 parts of mineral materials, 3-4 parts of chitosan, 5-10 parts of water, 8-18 parts of silicate, 5-10 parts of aluminum chloride salt and 5-10 parts of ferric chloride salt, and polyacrylamide accounts for 0.03-0.4% of the total mass of the raw materials. As the mine water flocculation reagent, preferably, the mineral material is zeolite, porous clay or hydroxyapatite, the particle size of the mineral material is 80-120 microns, and the silicate is sodium silicate or potassium silicate, and is firstly prepared into an aqueous solution with the mass concentration of 20-40% when in use. The mine water flocculation reagent as described above, preferably, the aluminum chloride salt is polyaluminum chloride and the ferric chloride salt is polyaluminum chloride. The preparation method of the mine water flocculation medicament comprises the following steps: S1, heating a mineral material; s2, adding water and chitosan, mixing, and performing ultrasonic treatment to uniformly disperse the mineral material and the chitosan; S3, adding silicate solution into the mixture after ultrasonic treatment, stirring, adjusting the pH value to be acidic by acid, adding aluminum chloride salt and ferric chloride salt, and continuously stirring for reaction; S4, adding polyacrylamide into the mixture after the stirring reaction in the S3, stirring, and aging in a constant temperature oven; S5, taking out, filtering, air-drying and grinding after ageing to obtain the mine water flocculation reagent. In the preparation method, in step S1, the heat treatment is preferably performed for 20-45 min at 300 ℃. In the preparation method, in the step S2, preferably, the stirring time is 10-20 min, and the ultrasonic treatment is carried out for 20-60 min under the condition of 28-40 KHz. In the above preparation method, preferably, in step S3, the acid is acetic acid or hydrochloric acid, and the pH is adjusted to 2.0-4.0. In the preparation method, preferably, in the step S3, the stirring reaction time is 15-45 min, and the stirring speed is 50-250 rpm. In the preparation method, in the step S4, preferably, the stirring time is 5-15 min, and the aging condition is 20-28 h in a 20 ℃ incubator. The application of the mine water flocculation medicament or the mine water flocculation medicament obtained by the preparation method in removing fluoride and dissolved COD in mine water. Wherein, when the mine water flocculation reagent is used for removing fluoride and dissolved COD in mine water, the addition amount of the mine water flocc