Calcium carbonate crusher manufacturer: what are the differences between light calcium and heavy calcium
Calcium carbonate manufacturers analyze the difference between light calcium and heavy calcium. Many purchasers say that light calcium and heavy calcium look the same and have the same purpose. Why are there so many price differences? Calcium carbonate manufacturers know that this statement is wrong. It is also used in many industries, but heavy calcium has the same purpose
The price is much cheaper than light calcium. Why would anyone use light calcium?
Secondly, the physical and chemical indexes of the two products are different, and the differences are as follows:
(1) The bulk density is different, which is the most obvious difference between the two. The bulk density of heavy calcium carbonate is 0.8 ~ 1.3g/cm3, that of light calcium is only 0.5 ~ 0.7g/cm3, and that of nano calcium carbonate products can be less than 0.3g/cm3.
⑵ the whiteness is different. Heavy calcium products have more impurities, generally 89 ~ 93%, while the whiteness of light calcium products is generally 92 ~ 95%, and some products can reach 96 ~ 97%, which is the main reason why light calcium products are often used in high-grade or light color products.
⑶ the moisture content is different. The water content of heavy calcium products is low and stable, generally 0.2 ~ 0.3%, and some high-grade heavy calcium products can even reach 0.1%; The water content of light calcium products is generally 0.3 ~ 0.8%, and the water stability is poor, sometimes there are certain fluctuations.
(4) at present, heavy calcium products with different particle sizes are only micron products, and the particle size is generally 0.5 ~ 45 μ m. Obviously larger than the particle size of light calcium.
(5) different crystal forms. Heavy calcium products are irregular, also known as amorphous, while light calcium products are generally regular. For example, ordinary light calcium is mainly spindle shaped, while nano calcium carbonate is mainly cubic.
To sum up, heavy calcium cannot replace light calcium, and the difference in processing cost and application scope between the two lead to a large price difference.
Batch modification production process of calcium carbonate: batch operation, large adjustment of modification time and temperature, strong adaptability to the process of different modifiers and (compound) formulations, and is very suitable for the surface chemical modification of small and medium batches of powders, such as the modification of coupling agents, especially silane coupling agents. The operating conditions include rotating speed, temperature, time, filling rate, adding method of modifier, etc. Intermittent surface modification process is to feed the measured powder raw materials and a certain amount of configured surface modifier into the surface modification equipment at the same time, and carry out surface modification treatment for a certain time at a certain temperature
After that, the treated materials are unloaded, and then the next batch of powder is added for surface modification. It is usually used together with air classifier to separate the agglomerated particles in the modification process and improve the product quality.
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