1. application
1) sewage purification as a coagulant;
2) The tannery is used as a post-treatment agent for aluminum tanning agents and flakes
3) dye industry as anti-dye agent;
4) paper industry for paper sizing on the dye;
5) The glass industry is used as a coloring agent for yellow glass;
6) medicine for Jian Jian agent;
7) printing and dyeing industry as mordant;
8) is also used for pigments, electroplating, starch and other industrial sectors
9) food grade products for the buffer, leavening agent.
2. Ammonium aluminium sulfate downstream product analysis
2.1. High purity alumina
High purity alumina powder (purity ≥99.99%) has the incomparable optical, electrical, magnetic, thermal and mechanical properties of ordinary alumina powder. It is widely used in high-tech new materials and modern industry. It is mainly used for: Information industry, high-quality integrated circuit ceramic substrate, green lighting energy-saving lamps with three primary colors phosphor, plasma display material (PDP powder), road traffic and public signs with long afterglow phosphor, light-emitting diode substrate materials, Sodium lamp transparent alumina tube, artificial crystal (laser generator artificial sapphire, ruby), carrier catalyst coating, high-precision grinding materials and artificial joints and bones, infrared absorption and heating powder and some new fluorescent decorative materials and other high-tech New materials in the field of the most critical base material. High purity alumina powder has become an important branch of advanced inorganic nonmetallic materials. It is one of the high-end materials industry with high output, high output value and wide use in the new material industry since the 20th century.
The actual market for high-purity alumina powder is very impressive. According to incomplete statistics, the annual demand of high-purity alumina in China has reached 20000-30000 tons, and its products have been continuously expanded with the application field Differentiation, serialization and extension of the development of high-purity alumina market prospects are more promising.
Because of the wide range of applications of high purity alumina, product serialization and extension of space, and other high-tech industries associated with a large degree of its own high-tech, high value-added products, but also a wide range of products , The upgrading of its preparation technology, high-purity alumina manufacturing industry and related industries will have a very significant impact, as modern high-tech new materials in the field of an important direction of development.
2.2. Phase change energy storage materials
Phase change materials (PCMs) refers to the material under certain conditions can be physical state (solid – liquid, liquid – gas, solid – gas, solid – solid, etc.) to change the material to the environment and the system temperature difference, Or light, electric field, magnetic field, chemical energy as the driving force, to achieve the absorption and release of thermal energy function or shape memory recovery function recording function, and in the phase change process, the chemical properties of the same material, the temperature can change slightly. As the energy storage phase change material, it should meet the main conditions are: the appropriate phase transition temperature; large enough phase change enthalpy; stable performance, can be used repeatedly; phase change when the expansion and contraction rate is small; good thermal conductivity, phase Variable speed; phase reversibility is good; subcooling small; raw materials cheaper and so easy.
The method of sol-gel method was used to prepare high-stability and high-capacity capacitive phase change energy storage materials with ammonium aluminium sulfate, SiCl4 and water as raw materials. Then, the method of replacing the fine aggregate sand with partial deformation energy storage material Preparation of phase change concrete, through the phase change material in the phase change process accompanied by the role of energy storage to slow down the concrete structure of the heating rate, to improve its constitutive relationship, to extend the structure of the fire conditions in the fire resistance limit, so as to escape As well as fire rescue to create more favorable conditions to reduce the number of casualties caused by fire and property damage.