Aluminum hydroxide manufacturers introduce you to the process of roasting process
The roasting process of aluminum hydroxide flame retardant is a process to make it change its chemical substance. In this process, it will undergo high temperature roasting, dehydration and crystallization reaction, and then become alumina. In this process, attention should be paid to the correct control of the method, so as to get the desired substance. The following is a brief introduction to the roasting process.
aluminum hydroxideThe baking process of flame retardant is a process to change the chemical substance. In this process, it will undergo high temperature baking, dehydration and crystallization reaction, and then become alumina. In this process, we should pay attention to the correct control of the method, so as to get the desired substance. The following is a brief introduction to the baking process.
1. When rotary kiln is used for roasting, the washed wet aluminum hydroxide flame retardant is fed into one end of the kiln, and heavy oil or gas is injected into the other end of the kiln. The reaction processes such as drying, removal of crystal water and crystal type transformation are completed in the kiln, and alumina is obtained after discharging and cooling.
2. When roasting in a fluidized furnace, the wet aluminum hydroxide flame retardant is fed into the dryer first, then into the fluidized roasting furnace, sprayed with fuel to roast into alumina, and then cooled by the retention tank, multi-stage cyclone heat exchange device and boiling bed cooler. Fluidized furnace roasting system, can make full use of the combustion exhaust gas and material cooling heat, to preheat into the cold material and combustion required gas and air, the system material in the fluidized state and gas heat exchange, high thermal efficiency, low heat consumption, only 60% to 70% of the rotary kiln device. The combustion exhaust gas of these two processes is purified by an electric dust collector and discharged into the atmosphere.
The specific reaction of the calcination process of aluminum hydroxide flame retardant is as described in this paper. The whole process is relatively simple. In the process of calcination, attention should be paid to the control of temperature and humidity, especially in the crystallization step, which will directly determine the form of alumina, so the method should be properly used.
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Everyone knows that there are two common flame retardants. Today we are going to talk about only one of them. Aluminum hydroxide flame retardant is an environmentally friendly halogen-free flame retardant, which can be widely used in fabrics, wood, plastics, and rubber., Polyurethane and other industries have ideal flame retardant effect. In the process of industrial application, it is found that flame retardant failure occurs when aluminum hydroxide flame retardant is added. The following are the reasons for the failure of aluminum hydroxide flame retardant, how to prevent it, how to deal with the operation, and restore the original function.
As a flame retardant, magnesium hydroxide also need to improve what aspects?
When it comes to flame retardants, everyone is familiar with them. Although we usually have less contact with them, we can know what they are used for from the name. Have to talk about magnesium hydroxide, we all know that its main presentation state is a granular, at present, the market sales of magnesium hydroxide particle size is larger, part of the commodity particle size up to tens of microns, immediately used as a flame retardant, poor dispersion, the physical properties of raw materials greater harm. In industrial production, physical grinding methods are generally used to reduce the particle size to 1 micron. The surface of magnesium hydroxide has high polarity and is easy to agglomerate. As the compatibility of refractory materials and polymer substrates, it not only reduces its flame retardant grade, but also causes more serious harm to the physical properties of raw materials.
Hefei Zhongke Flame Retardant New Material Co., Ltd
Sales Department Telephone:15905609730
Ministry of Foreign Trade Telephone:13956052398
Comprehensive department Telephone:0551-67712199
Company headquarters address: Hefei Feidong Economic Development Zone Xianghe Road 36
E-mail:hefei@zkxcl.com
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