The anode effect is a unique phenomenon in molten salt electrolysis, and the production performance of aluminum hydroxide micropowder is still obvious. If the anode effect occurs in the production, the electrolytic cell voltage rises rapidly, to 20~50V, or even higher. Then it has a great impact on the entire aluminum hydroxide micropowder electrolysis series. Reducing the current efficiency will affect the electrolysis technical indicators, reduce product output and quality, and affect the overall power supply. There are two treatment methods: using the effect rod to extinguish, or reducing the anode, increasing the dosage of aluminum hydroxide powder, so as to extinguish the anode effect.
The anodic effect occurs because oxygen ions in the micropowder electrolyte gradually decrease as the electrolysis proceeds. When a certain level is reached, fluorine precipitates and reacts with anode carbon to form carbon fluoride. When the carbon fluoride decomposes, fine carbon particles are precipitated. These carbon particles adhere to the surface of the anode and prevent the electrolyte from contacting the anode, so that the aluminum hydroxide fine powder does not wet the anode well. When new micropowder is added, oxygen precipitates on the anode, and the oxygen gradually reacts with the carbon powder.
Alumina micropowder is used as a raw material for high-alumina refractories, ceramic devices, automobile spark plugs, polishing and grinding products, etc. It is the basic material for the production of high-aluminum unshaped refractories, and it is also an excellent filler to improve the performance of refractory products. Its use is mainly reflected in the following aspects.
1. All kinds of aluminum hydroxide powder of aluminide raw materials, flame retardant additives of flammable materials such as plastics and rubber, paper making, surface pigments, coatings, toothpaste substrates, catalyst carriers, water purification agents, fluoride salts, desiccants, various molecular sieves, pharmaceutical industry, artificial agate, glass mosaic, quick-setting fillers for building materials, etc.
2. Activated aluminum hydroxide micropowder can improve the combination and processing performance of aluminum hydroxide micropowder and resin, making it both flame retardant and filling performance. Therefore, adding the product to advanced composite materials such as plastics and rubber not only makes the product have flame retardant and smoke suppression effects, but also enhances anti-leakage, anti-arc, and wear resistance. It can be used for low-density polyethylene cable materials for power, wire and cable insulation, sheath layer, rubber, heat insulation materials, conveyor belts, etc.
Because of the good characteristics of alumina powder, it is widely used in various fields. If you want to use it better, you need to know more about it to prevent unnecessary trouble, waste costs, and fail to achieve the expected results.