The value of kaolin purification and whitening

There are two tyeps of kaolin, one is coal kaolin and the other is kaolin mud. the whiteness of kaolin is one of the important indicators  that determine its application value, and the main factor that causes the whiteness of kaolin to decrease is the impurity content. Impurities are roughly divided into two categories: the first category is organic matter deposited with kaolinite, namely organic carbon, which dyes kaolin clay grayish black. The second type of substances are  the pigment elements iron and titanium. Organic carbon can be removed during high-temperature calcination, so the main factor affecting kaolin white is iron.

Common iron-bearing minerals in kaolin include: pyrite, limonite, hematite, siderite, magnetite, and potash, among which trivalent iron oxide is the most common. These iron minerals will make the kaolin show different shades of gray, green, brown, pink, etc, which will reduce the whiteness of the kaolin. If the titanium conten is too high, the kaolin balck will not be white enough, so the market value is not high. The level of whiteness determiness  the market value.

There are two main forms of titanium in kaolin : one is present in kaolinite and rich minerals(such as mica and titania), called structural titanium, the other is in the form of independent iron minerals, called free titanium. To increase the whiteness of the product to the specified range, it is necessary to take corresponding iorn removal measures.  Dear customers and friend, if you have kaolin purification , let's take a look at Wanjiade's kaolin magnetic separation equipment. There is always a solution and whitening complete line must meet your needs. Make your kaolin more valuable.