High salinity mine water refers to wastewater containing high concentrations of soluble minerals, usually referring to wastewater containing high concentrations of sodium, calcium, magnesium, iron, aluminum, potassium and other ions. These ions usually come from the environment in which the wastewater is located, raw materials and chemicals used in the industry or production process. Wastewater with high salinity usually has the characteristics of high salinity, high conductivity, high hardness, etc., and the harm to the environment and ecosystem also increases accordingly. When dealing with highly salinity wastewater, it is necessary to adopt corresponding treatment methods, such as reverse osmosis, ion exchange, evaporation crystallization and other technologies for treatment.
The reason why fluorine in high salinity wastewater exceeds the standard is mainly because fluorine is easily dissolved in water in the natural environment and some industrial processes, and in high salinity wastewater, water contains a large amount of dissolved minerals, these minerals may also contain fluorine. In addition, fluoride chemicals used in some industrial processes can lead to elevated fluoride concentrations in wastewater.
Excessive fluoride in mine water is a common problem, especially in some areas with high fluoride content.
In recent years, mine water with high salinity and special components has increased year by year, which has brought new challenges to mine water treatment. At the same time, after years of high-intensity mining, most mines have begun to turn to lower coal mining. With the increase of mining depth, The salinity and fluoride content in mine water have also increased significantly. At present, more than half of the mine water has TDS exceeding 1000mg/L or F-mass concentration exceeding 1mg/l. To deal with the demand, a lot of money needs to be invested in technological upgrading and transformation.
With the tightening of environmental protection policies, more and more attention has been paid to the treatment of mine water containing special components, and the relevant water quality standards have been greatly improved, which puts forward higher requirements for mine water treatment in coal mines.
What are the most common process technologies for mine water treatment?
●There are many technologies commonly used in mine water treatment, common ones include: sedimentation-filtration method, biological treatment method, adsorption method, membrane separation method, etc.
Among them, the precipitation-filtration method is the most commonly used method. The suspended impurities can be agglomerated in water by adding chemicals, and then removed by filtration. The biological treatment method is to purify water by using microorganisms to convert pollutants into harmless substances. The adsorption method is to use adsorbents to adsorb pollutants in water and remove them from water. The membrane separation method is to separate water from impurities by pressurizing the water body to achieve the purpose of filtering the water body. Different process technologies are suitable for different water quality conditions and requirements, and it is necessary to choose the appropriate method for mine water treatment according to the actual situation.
●Selective fluorine removal resin system Tulsimer®CH-87
The ability of Tulsimer® CH-87 to remove fluoride ions can reach a level below 1ppm. It works extremely efficiently in the neutral to alkaline pH range and is easily regenerated.
Tulsimer® CH-87 can be regenerated with aluminum chloride or aluminum sulfate
The technical advantages of the fluorine removal resin system are as follows:
1. Reduce the problem of scaling and fouling of equipment caused by excessive hardness in raw water;
2. Reduce the problem of excessive concentration of organic matter in chemical water, and aim at the removal of macromolecular organic matter;
3. The operation effect is stable, and the number of regenerations is more than 1000 times;
4. It is selective to fluoride ions, and general anions such as chloride ions, sulfate radicals, bicarbonate radicals, etc. have no interference;
5. Removal rate > 95%;
6. Adsorption and removal of organic matter, such as phenol, pyridine, pyrimidine, polycyclic aromatic hydrocarbons, etc.
7. It can also be applied to the purification of mother liquor to remove heavy metals (BYD mother liquor copper removal), and the advanced treatment of mercury-containing wastewater (PVC industry);
8. The equipment has a high degree of automatic control, which can greatly reduce labor costs;
9. Low operating cost and great environmental protection value for enterprises