Fine alumina is currently One of the new materials yet to be developed. Mainly refers to differentiated or extended products of aluminum ingots produced from alumina and aluminum hydroxide other than alumina, also known as non metallurgical grade alumina, special alumina, multi variety alumina or chemical alumina. Compared with metallurgical grade alumina, it has excellent physical and chemical properties, high added value, and environmental friendliness.

According to statistics, there are over 400 types of fine alumina, including pseudo boehmite, boehmite, ultrafine aluminum hydroxide, activated alumina, calcined alumina, corundum, etc. Different varieties have different performance and application ranges, and are widely used in both new materials and traditional fields, with considerable market demand. Domestic fine alumina products need to be replaced by localization.
According to Aluminum Industry Association (IAI) statistics, 1980 The production of fine alumina was 2.322 million tons, which increased to 4.342 million tons in 2001. In 2021 The production of fine alumina has reached 8.117 million tons.
In recent years, with the rapid development of the industrial alumina industry, the domestic supply of bauxite has become tight, and the production cost of industrial alumina has increased. More and more enterprises are entering the fine alumina industry, and the production of fine alumina in China is rapidly expanding. According to statistics, China's fine alumina production reached 3.755 million tons in 2021, accounting for The proportion of fine alumina production has been increasing year by year, reaching 46.26% by 2021. China has become The production of fine alumina is relatively high.

China's fine alumina output and Proportion (Data source: Aluminum Industry Association (IAI))
Foreign comprehensive aluminum product companies have a high degree of automation in their production equipment and advanced technology, There are many product varieties, precise classification, and good product quality; Production process control, product grading and homogenization, surface treatment, etc Technology. Good controllability of product performance. The production process can be adjusted according to different purposes to produce fine alumina products with specific crystal morphology, particle size distribution, chemical purity, and surface properties.
The domestic fine alumina industry started relatively late, and local enterprises have overcome the technical difficulties in fine alumina production through independent research and development, gradually achieving import substitution in the market. However, local enterprises' application technology, basic theoretical research, production processes, and equipment level in some product fields are inferior to There is still a certain gap among enterprises. The physical and chemical properties of the product need to be further improved, and the chemical purity, crystal morphology, stability, and application performance of the product cannot meet the requirements of all industries.
In addition, there are few varieties of fine alumina products in China, and the product series and subdivision are insufficient. There is still room for improvement in meeting the needs of various industries. Especially in the electronics industry, there are strict requirements for the technical indicators of fine alumina, such as crystal phase conversion rate, crystal morphology, particle size and distribution of the powder, sensitive specific elements, surface properties and activity of the powder, etc., And it requires The performance and quality of raw materials supplied in large quantities and batches are stable, and the technical and production thresholds are high. Most domestic enterprises still cannot meet market demand well, and their products are mainly supplied by foreign investment, urgently requiring localization as a substitute.