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Introduction Of Waster Water Treatment Methods In Concentrator

Introduction of Waster Water Treatment Methods in Concentrator

Mineral processing wastewater includes mineral processing drainage, tailings pond overflow and mine drainage. Drainage process drainage is generally transported with the tailings slurry to the tailings pool, collectively referred to as tailings water; hence the beneficiation Waster Water Treatment is also known as tailings water treatment.

The composition of the drainage of the concentrator is related to the composition, grade and selection method of the ore. Production of drainage may exceed the national industrial "three wastes" emission standards of the project are: pH, suspended solids, cyanide, fluoride, sulfide, Waster Water Treatment chemical oxygen consumption and heavy metal ions.

According to the wastewater contained in the wastewater from the concentrator, it can be divided into three kinds: waste water containing suspended solids, cyanide-containing wastewater and organic wastewater containing organic chemical. However, for the concentrator, regardless of heavy, magnetic, flotation plant wastewater contains a large number of suspended solids, and other pollutants with the sorting methods, ore varieties, such as flotation plant drainage containing organic mineral processing, lead, zinc , Tungsten, molybdenum, gold plant containing cyanide and other substances.

First, the characteristics of mineral processing wastewater and its hazards

The main harmful substances in the wastewater are heavy metal ions, mineral flotation with a variety of organic and inorganic flotation agents, including highly toxic cyanide, cyanochrome and so on. Wastewater also contains a variety of insoluble coarse particles and fine particles dispersed impurities. Ore waste water often also contains sodium, magnesium, calcium and other sulfate, chloride or hydroxide. Waster Water Treatment The acid in the beneficiation wastewater is mainly composed of sulfur-containing minerals which are mixed with water by air oxidation.

Pollutants in the wastewater are mainly suspended matter, acid and alkali, heavy metals and arsenic, fluoride, mineral processing chemicals, chemical oxygenated substances and other pollutants such as oil, phenol, ammonium, phosphine and so on. Heavy metals such as copper, lead, zinc, chromium, mercury and arsenic ions and their compounds are well known. The main hazards of other pollutants are as follows:

(1) Suspended matter: suspended solids in water can occur such as blocking fish gills, affecting algae photosynthesis to interfere with water biological living conditions, if the suspended solids concentration is too high, it may also make the river sedimentation, with its irrigation will make soil The If the water is used as a living water, the suspended matter is a substance that makes people feel uncomfortable and is a carrier of bacteria and viruses, which is potentially harmful to the human body. Even when heavy metal compounds are present in the suspended matter, they are released into the water under certain conditions (pH drop, ionic strength, Waster Water Treatment organic chelate concentration change, etc.).

(2) xanthate: that is, xanthate, pale yellow powder, irritating odor, easy to break down, olfactory valve 0.005mg / L. Shrimp and other shrimp in the water that is contaminated with xanthate. The xanthate is soluble in water and is unstable in water, especially under acidic conditions. The decomposing substance CS may be a sulfur pollutant. Therefore, the maximum allowable concentration of butyl xanthate in ground water is 0.005mg / L, while the concentration of sodium butyric acid in the former Soviet Union is 0.001mg / L.

(3) black medicine: dihydroxy disulfide phosphate as the main component, including impurities, including formic acid, phosphoric acid, sulfur cresol and hydrogen sulfide. Showing a dark brown oily liquid, slightly soluble in water, with hydrogen sulfide odor. It is also a source of polluting phenol, phosphorus and other pollution.

(4) pine oil: that is 2 # flotation oil, Waster Water Treatment the main component of terpene alcohol. Yellow brown oily transparent liquid, insoluble in water, is a non-toxic mineral processing agents, but with rosin flavor, which can cause changes in water perception performance. Because pine oil is a foaming agent, it is easy to produce an unpleasant foam.

(5) cyanide: highly toxic substances, its into the human body, under the action of gastric acid was hydrolyzed into hydrocyanic acid and was absorbed by the stomach, and then into the blood. The hydrocyanic acid in the blood can bind to the iron ions of cytochrome oxidase to produce oxidized high iron cell chromase acidase, thereby losing the ability to transmit oxygen, causing tissue hypoxia to cause poisoning. However, cyanide can be removed by self-purification in the water, so if this property can be used to extend the residence time of the beneficiation wastewater in the tailings reservoir, the discharge standard can be achieved.

(6) Sulfide: Under normal circumstances, S, HS in the water will affect the health of water, in acidic conditions to generate hydrogen sulfide. When the water hydrogen sulfide content of more than 0.5mg / L, the fish have toxic effects, and can be aware of the smell of its emissions; Waster Water Treatment atmospheric hydrogen sulfide olfactory valve l0mg / m. In addition, low concentrations of CS, volatile in water, through the breathing and skin into the human body, long-term exposure can cause poisoning, leading to neurological disease Charcote (carbon dioxide) carbon disulfide hysteria.

Second, the general principles of Waster Water Treatment plant concentrator:

(1) should make full use of tailings for clarification and natural purification.

(2) If the natural precipitation does not meet the emission requirements, should be used to add flocculant, chemical or other methods.

(3) If you want to use chemical treatment, it is appropriate to use a pharmaceutical agent. If not bear, according to the pollution situation, the use of several drugs, Waster Water Treatment but the type of pharmaceutical should not be too much.

(4) the use of chemicals should be non-toxic, low toxicity, high efficiency or light pollution, low prices and easy to obtain the pharmaceutical. Concentrator The most commonly used agent for Waster Water Treatment is lime.

(5) should be analyzed and studied the composition of wastewater, the use of its different nature, so that waste treatment waste, comprehensive management.

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