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At present, more than 90% of the alumina and aluminum hydroxide produced worldwide are produced by the Bayer process. The higher the Al2O3 content, the better the various technical indexes of smelting corundum. SiO2 is a harmful impurity in the production of alumina by the alkaline method. fused alumina manufacturer However, when the ball milling time is extended to a certain limit, the pulverization effect is reduced. For fine powder. The higher the content, the better.
Al2O3 is the main component in bauxite. At present, the production of industrial alumina requires an aluminum-silicon ratio of not less than 3.0 to 3.5. Other oxides are regarded as impurities. The high content of SiO2 in bauxite will reduce the production efficiency of smelting brown corundum or the production of industrial garnet abrasive and increase the impurity component. Al2O3-H2O crystalline compounds can be prepared by artificial methods.
The quality requirements of high alumina bauxite include chemical composition, dehydration degree, particle size, etc., because these factors will affect the brown corundum smelting technical indicators and product quality to varying degrees. High alumina bauxite is the raw material to provide Al2O3, which is the main component of corundum. With the increase of Al2O3 content, the unit power consumption decreases. Therefore, the smelting of brown corundum requires the use of high-quality bauxite as much as possible.
Different types of bauxite have different crystal states due to their alumina, so the reaction ability with sodium aluminate solution will naturally be different. Even if the same type of bauxite has different crystal integrity due to different places of origin, its dissolution performance will be different. The dissolution performance of different types of bauxite will be discussed below. In gibbsite type bauxite, emery abrasive mainly exists in the form of gibbsite (Al2O3 · 3H2O).
As we all know, special refractories are a group of new refractories developed on the basis of traditional ceramics and refractories, also known as high temperature ceramics. Ceramic is named after technology.fused alumina Usually, products made by powder making, molding, sintering and other processes are called ceramics. It can also be said that special refractories are refractory products made of ceramic production process. The slurry shall have good suspension and fluidity.
Teeth whitening: Some consumers buy activated charcoal powder to get a brighter smile. But according to the American Dental Association, consumers should not use abrasive cleansers to whiten their teeth. The dental organization says you may actually cause your teeth to become more yellow. Instead, they recommend the ADA recommends using whitening toothpaste with an ADA seal of approval so that you know you are getting a product that is both safe and effective.
Hangover prevention: Activated charcoal is a popular ingredient found in many over-the-counter hangover products. Some consumers even take the product before drinking to reduce the side effects of alcohol. But the use of pellets activated carbon as a hangover cure or preventive treatment is not supported by health experts because the substance does not trap alcohol well.
Traveler's diarrhea (TD): According to the Centers for Disease Control, there is no strong evidence to support the use of activated charcoal for traveler's diarrhea or related stomach problems. The health organization specifically cautions again using the supplement to treat children with TD or dehydration as it may prevent the absorption of healthy nutrients.
Cholestasis during pregnancy: Some studies support the use of activated charcoal for treating reduced bile flow (a condition called cholestasis) during pregnancy. But the most conclusive examination of the evidence concludes there is nevertheless insufficient evidence to support its use.Women who are pregnant or breastfeeding should consult with their physician before taking activated charcoal or any supplement.
Charcoal detox diet: Since activated charcoal has been well-documented as a medical detoxification aid, some health, and wellness brands have begun selling drinks (like lemonade or tea) made with the supplement. carbon activated manufacturer There have also been stories in the media about charcoal diet weight loss and about celebrities using charcoal to improve their health. While it is possible that you might lose weight on a diet plan that includes activated charcoal, the product itself provides no healthy weight loss benefit.In fact, if you drink enough activated charcoal you may lose weight because your body is less effective at absorbing important nutrients—making you less healthy, not more healthy.
1.Raw material screening of coconut shell activated carbon
The quality of activated carbon depends on the quality of raw materials. There are two main sources of coconut shell activated carbon on the market, one is Hainan coconut shell and the other is Indonesian coconut shell.granular activated carbon The shell of Hainan coconut is thin and the density is not very high, while the shell of Indonesian coconut is very thick and the density is high. In contrast, the quality of the activated carbon processed by Indonesian coconut shell will be better.
2.Carbonization
Put the sifted coconut shell into the carbonization equipment, burn it to a certain degree at high temperature, then close the charcoal kiln to let the air in, and then continue to heat and dry distillation to make the moisture and wood tar in the coconut shell be simmered, which forms the coconut shell char .
3.Activation
Put the carbonized coconut shell char into the activation furnace, and make oxygen-containing gas such as water vapor, flue gas (main component is CO2) as an activator, and contact with the carbon at high temperature to produce redox reaction to activate. The main operating conditions of the activation process include activation temperature, activation time, flow rate and temperature of the activator, feed rate, and oxygen content in the activation furnace.
4.Particle size screening of coconut shell activated carbon
The activated coconut shell charcoal becomes coconut shell activated carbon at this time, and then it can be sieved according to the customer’s particle size requirements. The commonly used coconut shell activated carbon particle size is 6-12 mesh, 8-16 mesh, 10-24 mesh , 20-40 mesh, 200 mesh, 325 mesh, etc.
5.Packaging
The packaging specification of coconut shell carbon is generally 25kg/bag or ton bag. The packaging bag uses double-layer woven bag, which is strong and has a moisture-proof function.
Coconut shell activated carbon production process relative humidity
The relative humidity of the gas during production should be 70-100%. When the humidity is insufficient, it can supplement water vapor, but it cannot bring liquid water into the activated carbon bed.
The quality of the product can be reflected in the production process. The rigor and steps of the coconut shell activated carbon in the production process can see why the price is higher than other activated carbon.
Coconut shell activated carbon production process temperature
The normal use temperature can be 27-82℃, and the best use temperature is 32-52℃. The desulfurization tower should be kept warm when used in cold areas.