There are two domestic production processes for aluminum sulfate. One is a normal pressure process to produce aluminum sulfate, and the other is a medium pressure process to produce aluminum sulfate. The production of aluminum sulfate by the atmospheric pressure process consumes a lot of energy, produces large amounts of waste gas, and poses serious environmental problems. The medium-pressure production process has low energy consumption, low exhaust gas emissions, clean and environmentally friendly production, and is in line with the country's low-carbon and environmentally friendly development direction.

The technology for producing aluminum sulfate through medium-pressure reaction is relatively mature, and the production process can fully meet the needs of catalyst production. However, the domestic medium-pressure aluminum sulfate production process uses equipment such as glass lined reactors, carbon steel lead-lined acid-resistant tile reactors, and carbon steel lead-lined graphite plate kettles. These reactors also have obvious defects in industrial production. Defects. Glass lined reactors are prone to bursting and de-enameling due to the rapid thermal expansion and contraction during the aluminum sulfate reaction process, and their service life is not long; carbon steel lead-lined and acid-resistant ceramic tile reactors, because lead generates lead vapor at high temperatures, affect human health and fail to meet the requirements. Meets environmental protection requirements; the carbon steel lead-lined graphite plate kettle undergoes rapid thermal expansion and contraction during the reaction process of the sulfuric acid pot, and the graphite plate is easy to delaminate. The graphite plate needs to be relined after about a year of use. Moreover, the reaction kettle is lined with lead, which will occur at high temperatures. Lead vapor affects human health.
Repeated demonstrations were conducted on the reactor made of zirconium and zirconium composite plates, and it was found that the reactor made of zirconium composite plates was feasible in the aluminum sulfate reaction. In 2012, one company built a zirconium reactor and used it in the aluminum sulfate device in the production field, and achieved good results. But the cost of zirconium reactors is more expensive than glass lined reactors and other material reactors, comparing with market profit on aluminium sulfate, the popular equipment still is glass lined reactors. Kingsmate New Material Machinery Co.,ltd adopt imported industrial enamel from Czech, make the enamel have longer life up to 5years at least. Saving the product cost for users.