Decolorization method of diatomite effect of Diato

2022-07-22
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Diatomite, with the characteristics of large porosity, strong absorption, stable chemical properties, wear resistance and heat resistance, can provide excellent surface properties, compatibilization, thickening and improving adhesion for coatings. Because of its large pore volume, it can shorten the drying time of the film. It can also reduce the amount of resin and reduce the cost

diatomite is mainly distributed in the United States, China, Denmark, France and other countries. China's diatomite has proven reserves of 320 million tons. High quality soil is mainly concentrated in the Changbai Mountain Area of Jilin Province, accounting for about 2/3 of the country. Most of the other deposits are grade 3-4 soil. Due to the high content of impurities, it cannot be directly processed and utilized. The following editor will introduce the decolorization method of diatomite and the function of diatomite

decolorization method of diatomite

the decolorization of diatomite now generally adopts acid pickling and roasting, and in order to further improve the product effect in today's industry, activated carbon will be added to ensure that the colored substances in the solution and other substances that have a negative impact on the product quality are completely absorbed. The dosage ratio of diatomite and activated carbon can refer to 0.2% to 0.3% of the article. And generally, stirring it for ten to fifteen minutes can completely remove those substances that have a negative impact on the product. Many people will use the simplest resin method when decolorizing non white diatomite, but in fact, this method is not used, which is easy to cause problems and fail to achieve the expected effect. Therefore, it is recommended that you do not be afraid of trouble, but use acid pickling and roasting methods, and professional equipment is also available on the market at a reasonable price

role of diatomite

1. Screening role

this is a kind of surface filtration. When the fluid flows through diatomite, the pore of diatomite is smaller than the particle size of impurity particles, so the impurity particles cannot pass through and are intercepted. This role is called screening

in fact, the surface of the filter cake can be regarded as a screen surface with equivalent average pore size. When the diameter of solid particles is not less than (or slightly less than) the pore diameter of diatomite, solid particles will be removed from the suspension “ Screening ” Come out and play the role of surface filtration

2. Depth effect

depth effect is the retention effect of deep filtration. In deep filtration, the separation process only occurs in the “ Internal ”, Part of the relatively small impurity particles passing through the surface of the filter cake are blocked by the zigzag microporous channels in the diatomite and the finer pores in the filter cake. This kind of particles are often smaller than the micropores in the diatomite. When the particles hit the wall of the channel, it is possible to separate from the liquid flow, but whether it can achieve this depends on the balance of inertia force and resistance received by the particles. This interception and screening action is similar in nature, All belong to mechanical action. The ability to filter solid particles is basically only related to the relative size and shape of solid particles and pores

3. Adsorption

adsorption is quite different from the above two filtration mechanisms. In fact, this effect can also be regarded as electrokinetic attraction, which mainly depends on the surface properties of solid particles and diatomite itself. When the particles with small pores in the diatomite collide with the internal surface of the porous diatomite, they are attracted by opposite charges, and the other is that the particles attract each other to form chains and adhere to the diatomite, which belong to adsorption

Application of diatomite

1. Diatomite is a high-quality filter aid and adsorbent material, which is widely used in food, medicine, sewage treatment and other fields, such as beer filtration, plasma filtration, drinking water purification and so on

2. Make cosmetics, facial mask, etc. Diatomite facial mask uses the adsorption property of diatomite to adsorb impurities in the skin and play a role in deep care and whitening. People in some countries often apply it all over their body for body beauty, which plays a role in skin care

3. Disposal of nuclear waste

editor's summary: This is the end of the introduction about the decolorization method of diatomite and the function of diatomite. I hope it will be helpful to you. If you want to know more, you can pay attention to information

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