What are the differences between activated alumina balls and alumina balls?

What are alumina balls and activated alumina balls, and what are their similarities and differences? The difference between the two is aluminum oxide powder. Calcined aluminum oxide powder, abbreviated as calcined aluminum oxide powder, has a density of 3.9-4.0g/cm3, a melting point of 2050 ℃, a boiling point of 2980 ℃, and is insoluble in water. Industrial alumina mainly includes aluminum oxide powder and aluminum oxide powder. It can be extracted from bauxite in industry.

Bauxite (Al2O3H2O and Al2O33H2O) is the primary mineral of aluminum in nature. It is damaged and immersed in a high-temperature sodium hydroxide solution to obtain a sodium aluminate solution. Filter to remove slag, cool the filtrate, participate in aluminum hydroxide crystals, and after prolonged stirring, the sodium aluminate solution will differentiate into aluminum hydroxide piles; Wash the accumulated materials separately and calcine them at high temperatures above 1550 ℃ to obtain the calcined alumina powder. Aluminum oxide type, in; In the lattice of type A alumina, oxygen ions are tightly packed into hexagonal shapes, and Al3+is symmetrically distributed at the octahedral coordination center surrounded by oxygen ions. The lattice energy is large, so the melting and boiling points are high. Type A alumina is insoluble in water and acid, also known in industry as alumina, and is the fundamental material for making metallic aluminum. It is also used for making various refractory bricks, refractory crucibles, refractory pipelines, and high-temperature resistant experimental instruments; It can also be used as abrasives, flame retardants, fillers, etc. High purity α Aluminum oxide is also a material for producing artificial corundum, artificial ruby, and sapphire; It is also used to produce modern large-scale integrated circuit boards.

Type A alumina is produced by dehydration of aluminum hydroxide at low temperatures of 140-150 ℃, and is also known as activated alumina and aluminum adhesive in industry. In this structure, oxygen ions are approximately tightly packed at the vertical center of mass, and Al3+is irregularly distributed in the octahedral and tetrahedral spaces surrounded by oxygen ions. Type alumina is insoluble in water, but soluble in strong acid or alkaline solutions. When heated to 1200 ℃, it will completely transform into aluminum oxide type. Aluminum oxide is a porous material with an internal surface area of several hundred square meters per gram, high activity, and strong adsorption. Industrial products are usually colorless or pink cylindrical particles with good pressure resistance.

It is commonly used as an adsorbent, catalyst, and catalyst carrier in petroleum refining and petrochemical industry operations. In industry, it is a deacidifying agent for transformer oil and turbine oil, and is also used for chromatographic analysis; It is a neutral and strong single agent in the laboratory, and can only be adjusted monotonically to no less than phosphorus pentoxide. After heating to below 175 ℃ for 6-8 hours, it can be reused again.

Aluminum oxide grinding balls are widely used in ceramic factories, refractory material manufacturing factories, etc. Now the data is flashing, and grinding balls using goose soft stone as the medium are gradually being replaced. Using pebbles (natural pebbles) 10% alumina grinding balls（ φ 35mm) grinding slurry can shorten the grinding time by 15% compared to using only pebbles. Using high aluminum balls+30% alumina grinding balls（ φ 35mm) grinding mud can shorten the grinding time by about 30% compared to using only aluminum balls. The high cost brought by using aluminum balls can be saved by only saving electricity bills and about 2 years. According to reports from some manufacturers, all alumina grinding balls are used instead of the original natural balls, with a production capacity of about three times that of the original ones. Nowadays, most cement plants also have steel balls that were originally used, but instead use high aluminum balls with longer lifespans.

Therefore, using aluminum oxide grinding balls to grind materials not only saves electricity costs and increases production, but also enables the use of mechanical power, which has a great protective effect on mechanical equipment. In addition to ceramic operations, timely and chemical operations are also being inspected and produced using alumina grinding balls.