Application-Poly Aluminium Chloride

• As flocculants, it is mainly used for purifying drinking water and the treatment of special water such as removal of iron, fluorine, cadmium, radioactive contamination as well as floating oil.
• It can also be used for the treatment of industrial wastewater such as dyeing wastewater.
• Moreover, it can also be used for precision casting, pharmaceutical, paper, and leathering. It is one kind of refractory binder.
• It is a kind of aluminum hydroxide sol made from aluminum-containing material or aluminum metal which subject to several chemical/physical treatment steps such as hydrochloric acid dissolution, hydrolysis, and polymerization.
• Poly aluminium chloride can be taken as the intermediate of the hydrolysis process of AlCl3 into Al(OH)3 and therefore the hydrolysis solution is acidic.
• Poly aluminium chloride is also known as hydroxy aluminum or basic aluminum chloride with the chemical formula being [Al2 (OH) nCl6-n] m, wherein if the n is close to or equal to 6, it can be called as alumina sol.
• Applying poly aluminium chloride as a binding agent of loose refractory will not affect its refractoriness.
• The Al2O3 generated during the dehydration and decomposition of poly aluminium chloride during the heating process is a kind of active alumina oxide with high-degree of dispersion which can facilitate the sintering, and thus being suitable for being used as the refractory binder.
• When being used as the binding agent of monolithic refractory, it has certain requirement on both the alkalinity and density with poly aluminium chloride with either too low or too high bond strength not good. In general, poly aluminium chloride with alkalized degree being within 46% to 72% and the density being within 1.17~1.23kg/m3 has a good binding strength.
• But when applying the poly aluminium chloride as unshaped refractory binder, because of its acidic solution (pH〈5), it will have reaction with iron and iron-containing compounds contained in the refractory to release hydrogen and cause swelling of the material.
• Therefore, the preparation technology should containging step in order to avoid the swelling and further cracking of good molded product or lining.
• It can be used for the purification process of drinking water as well as various kinds of industrial waste water.

使用方法

Dosage of polyaluminium chloride for different water quality:

• In low turbidity water, dilute the solid polyaluminium chloride product with tap water at a ratio of 1:3 (weight ratio) and stir until completely dissolved.
• In domestic and industrial sewage, about 30g of polyaluminium chloride product is added per ton of sewage. The diluted polyacrylamide product is then added. (If the effect is not obvious, please reduce or increase the amount of product added as appropriate)
• In paper mill wastewater treatment, low turbidity water is used in a certain proportion. If the effect is not obvious, add an appropriate amount.
• When the turbidity of raw water is 100-500 mg/L, the dosage is 5-10 mg, that is, 5-10 kg per 1,000 tons of water. Before use, it is best to conduct a small test based on the water quality characteristics, select the best value, and then put it into use. .

Common sewage discharge ratio:

Packing

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