Water treatment chemicals are essential chemical agents in the process of industrial water, domestic water, and wastewater treatment. The use of these chemicals allows water quality requirements to meet standards.
The application of water treatment chemicals is very extensive. Will water treatment chemicals be used in steel production? Let us look at the secrets of water treatment in steel plants.
Use in ironworks
Cooling circulating water treatment chemical for blast furnace and hot blast stove. It includes an open circuit system. Semi-open loop system. Pure water closed loop system and other processes. Blast furnace gas washing water turbid circulation system. Blast furnace slag water circulation system. The blower circulates water to treat the medicament.
Use of steel mills
Oxygen converter flue gas purification sewage treatment agent. The converter indirectly cools the circulating water treatment chemical. Electric furnace net circulation cooling water system. The converter softens the cooling water system. Electric furnace soft water cooling water system. Converter sludge treatment system. Electric furnace vacuum treatment of sewage treatment chemicals.
Use in continuous casting plants
Crystallizer soft water (or demineralized water) closed circuit circulating water system. Secondary cooling of the turbid circulating water system. Direct cooling of the turbid circulating water system. Sludge dewatering treatment agent.
Use in hot rolling mills
Hot-rolled net-circulating water treatment chemical. Hot rolled turbid circulating water treatment chemical. Filter backwash water treatment chemical. Oil-containing emulsion wastewater treatment chemical. Sludge treatment system.
Use in cold rolling mills
Indirect cooling of the open circuit water treatment chemical. Acid and alkali wastewater treatment chemical. Oil-containing, emulsion-containing wastewater treatment chemical. Sludge treatment system.
What is the most suitable water treatment chemical for steel sewage treatment?
Water treatment chemicals are used in wastewater treatment in many industries. The sewage treatment agent is determined according to the nature of the sewage.
For example, the use of chemicals in metal steel sewage treatment agents is generally recommended to use sewage treatment flocculants. An anionic polyacrylamide having a molecular weight of between 1400 and 1600 (million) is used. Industrial grade polyaluminum chloride is used in combination.
Steel wastewater is water from the production of steel and some equipment water, cooling water, washing water and so on. The direct cooling water is in direct contact with the product materials, and contains pollutants, which can be recycled or used in cascade.
The quality of the wastewater produced is different for the production process of the steel plant. In addition, most steelmaking is intermittent production. Therefore, the composition and properties of wastewater are constantly changing with the peak period of smelting and the peak period.
Before the wastewater produced by the steel plant enters the sedimentation tank, it passes through the coarse particle separator equipment. Remove suspended impurities from large particles. Then it is discharged into the sewage sedimentation tank.
The flake alkali or ferrous sulfate product is added to the sewage sedimentation tank according to the water quality of the wastewater. Then, the polymer polyacrylamide product is placed after the pH value is debugged. Finally, the wastewater is flocculated and suspended in the sedimentation tank. Thereby solving the problem of clarification of wastewater.
When processing steel wastewater, a certain proportion of polyaluminum chloride is added before the polyacrylamide product is placed. When the polyaluminum chloride is placed in the sewage, the suspended matter in the water will flocculate the smaller flocs. This produces greater flocculation in the wastewater. Allow the suspension to settle faster. Thereby achieving a better and faster flocculation effect.