Polyaluminium Chloride Product Introduction
Liquid polyaluminium chloride products are light yellow to brownish yellow suspensions, and solid products are light yellow or orange crystalline powder particles. During hydrolysis, there are physical and chemical processes such as electrochemistry, coagulation, adsorption and precipitation; it has stable properties and can strongly remove organic poisons and heavy metal ions. Products with the optimal form distribution contain more than 8% alumina, and solid products contain 20% - 40% alumina.
I. Preparation Methods
The preparation of water purifying agent polyaluminium chloride from industrial aluminum scraps is a simple and economical method. Since the main components of industrial aluminum scraps are aluminum (94%), aluminum trioxide (0.5%) and impurities (5.5%), the purity of the water purifying agent after polymerization is high. Polyaluminium chloride can also be obtained by this simple process. In addition, the product after reaction can be cured. Polyaluminium chloride can also be prepared by the aluminum dross acid dissolution method using industrial aluminum scraps to make water purifying agents.
The preparation of water purifying agent polyaluminium chloride from industrial aluminum scraps is a simple and economical method. Because the main components of industrial aluminum scraps are aluminum (94%), aluminum trioxide (0.5%) and impurities (5.5%). After polymerization, the purity of the water purifying agent is high. The production process is also relatively simple. The product after reaction can be cured. Polyaluminium chloride can also be prepared by the aluminum dross acid dissolution method.
II. Advantages
Due to the advantages of good stability of spray drying, wide adaptability to water areas, fast hydrolysis speed, strong adsorption capacity, large flocs formed, dense and fast precipitation, low effluent turbidity and good dehydration performance, PAC (polyaluminium chloride) has a reduced dosage in the case of the same water quality. Especially when the water quality is poor, the dosage of spray - dried products can be reduced by half compared with roller - dried polyaluminium chloride, which not only reduces the labor intensity of workers, but more importantly, reduces the water production cost for users.
In addition, the use of spray - dried products can ensure safety, reduce water accidents, and is very safe and reliable for residents' drinking water. Polyaluminium chloride, referred to as high - efficiency polyaluminium chloride or high - efficiency PAC, is polymerized from high - quality raw materials using the most advanced production technology currently available. All quality indicators of Zhuqing meet or even exceed the requirements of the national standard GB15892 - 2009. Polyaluminium chloride is processed by spray drying technology, so it can also be called high - efficiency spray - dried polyaluminium chloride. Characteristics of polyaluminium chloride PAC products: Kaibiyuan brand PAC products have the characteristics of fine powder, uniform particles, easy solubility in water, good flocculation effect, efficient and stable purification, small dosage and low cost. It is suitable for drinking water purification, urban water supply purification and industrial water supply purification; it is applicable to raw water with various turbidities, has a wide pH application range, and the flocs form large and fast with a fast sedimentation speed.
Water insoluble matter of PAC (polyaluminium chloride): Using plate and frame filtration technology, the mass fraction of water insoluble matter in solids is below 0.3%, and that in liquids is below 0.1%, which can ensure the smooth flow of users' pipelines and improve the drug utilization rate, which cannot be achieved by natural sedimentation. Polyaluminium chloride PAC - 01 (light yellow powder, spray dried): used for drinking water treatment and wastewater treatment. Polyaluminium chloride is one of the star products in the water treatment agent series. It is a compound high - efficiency product integrating the advantages of ordinary polyaluminium chloride, spray - type polyaluminium chloride, high - efficiency polyaluminium chloride for papermaking, etc. All water treatment agent products are tested according to the latest national standards, and water treatment agents are tested according to GB15892 - 2009.
Water treatment agent - high - efficiency polyaluminium chloride is currently the best inorganic polymer water treatment agent in China. It has a very good effect on treating water of various concentrations with a small dosage. Its dosage is 50% less than that of ferrous sulfate with the same concentration and 10% less than that of polyaluminium chloride with the same concentration. The high efficiency and low energy consumption are mainly due to the high polymerization degree of PAFC. Generally, iron salt and aluminum salt water treatment agents can only generate simple hydrolyzed hydroxyl ions such as AL(OH)₂⁺, AL(OH)⁺₂, Fe(OH)₂⁺, Fe(OH)⁺₂ during hydrolysis, while PAEC itself is a pre - hydrolyzed product of AL³⁺ and Fe³⁺. During hydrolysis, in addition to generating the above hydroxyl ions, it can mainly generate a large number of high - polymerization degree and positively charged polyhydroxyl cations such as AL₄(OH)₄⁺₈, Fe₄(OH)₄⁺₈... to neutralize the charge of colloidal particles in water, compress the electric double layer, and at the same time, a series of reactions such as hydroxyl bridging, crosslinking and surface adsorption occur, which aggregate into large flocs and precipitate quickly under corresponding collisions.
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