Polyaluminum chloride has adsorption, condensation, precipitation and other properties, its stability is poor, corrosive, such as accidentally spilled on the skin to wash immediately.Production personnel should wear overalls, masks, gloves, wear rubber boots.Polyaluminum chloride has the advantages of good spray drying stability, wide water area, fast hydrolysis speed, strong adsorption capacity, large alum flower formation, fast precipitation, low water turbidity and good dehydration performance.Spray drying products can ensure safety, reduce water accidents, drinking water for the residents is very safe and reliable.Therefore, polyaluminum chloride, also referred to as high-efficiency polyaluminum chloride, high-efficiency PAC or high-efficiency spray drying polyaluminum chloride.Polyaluminum chloride is suitable for raw water with various turbidity, with a wide range of pH applications, but its sedimentation effect is far less than that of polyacrylamide.
The basicity of polyaluminum chloride is a relatively important index in polyaluminum, especially for drinking water grade polyaluminum products.The lower the salt base, the higher the price, each buyer can operate according to the actual situation of the manufacturer.In addition, different raw materials, different processes of production processing of polyaluminum chloride products are different in the salt base, which requires the manufacturer to adjust.The economic benefits of production and use can be greatly increased by increasing the salt base degree of polyaluminum chloride products.The basicity is increased from 65% to 92%, the cost of raw materials can be reduced by 20%, and the cost of use can be reduced by 40%.
The color of polyaluminum chloride generally has white, yellow, tan, different colors of polyaluminum chloride in the application and production technology is also quite different.The polyaluminum chloride with the content of trialoxide in the range of national standard ranging from 27% to 30% is mostly a solid powder of kha-yellow to yellow and light yellow.These types of polyaluminum chloride have good water solubility. In the process of dissolution, with the physical and chemical changes such as electrochemistry, coagulation, adsorption and precipitation, the flocs form fast and thick, have high activity, precipitate quickly, and have obvious purification effect on high turbidity water.White polyaluminum chloride because it is known as high purity non-iron white polyaluminum chloride, or food grade white polyaluminum chloride, compared with his polyaluminum chloride is the highest quality products, the main raw material is high quality aluminum hydroxide powder, hydrochloric acid, the production process is the most advanced domestic technology spray drying method.White polyaluminium chloride is used in papermaking sizing agent, sugar decolorizing and clarifying agent, tanning leather, medicine, cosmetics and precision casting and water treatment.
The raw material of yellow polyaluminium chloride is calcium aluminate powder, hydrochloric acid, bauxite, mainly used in sewage treatment and drinking water treatment, the raw material used for drinking water treatment is aluminum hydroxide powder, hydrochloric acid, there is a little calcium aluminate powder, the process adopted is the plate frame filter process or spray drying process.For the treatment of drinking water, the country has strict requirements on heavy metals, so both the raw materials and the production process are better than tan polyaluminum chloride.Yellow polyaluminium chloride is generally produced by drum drying or by spray tower drying.The raw materials of brown polyaluminum chloride are calcium aluminate powder, hydrochloric acid, bauxite and iron powder.The production process is to adopt the drum drying method, generally mainly used in sewage treatment, because the iron powder is added inside so the color is brown, the more iron powder is added, the color is darker, iron powder if more than a certain amount in some time is also known as polyaluminum-iron chloride, in sewage treatment has an excellent effect.
Post time: Apr-15-2020