How To Beneficiate And Purify Dolomite
First, the raw dolomite is crushed and screened to remove any impurities. It then goes through a calcination process, which heats the dolomite to high temperatures to remove carbon dioxide and other volatile elements.
Next, the calcined dolomite is ground into a fine powder and then further processed through various techniques such as flotation or magnetic separation to separate the dolomite from other minerals.
1. Crushing process
The first step in the process involves primary crushing, using heavy machinery to break large chunks of dolomite into smaller pieces. This initial crushing stage plays a crucial role in determining the final size and quality of the dolomite aggregate produced. After primary crushing, the dolomite undergoes secondary and tertiary crushing processes to obtain the desired particle size distribution. These subsequent stages involve further reduction of the dolomite particles through multiple crushers to ensure a consistent quality and particle size distribution in the final product.
2. Calcination
Then, it goes through a calcination process, where the dolomite is heated to high temperatures to remove carbon dioxide and other volatile elements.
3. Grinding process
Next, the calcined dolomite is ground into a fine powder, which is then further processed and purified through various techniques such as flotation or magnetic separation.
4. Flotation process
Condition the slurry with reagents to promote the separation of dolomite from other minerals. Then it enters the flotation machine, using bubbles to selectively adhere and separate the required dolomite particles. Generally speaking, by adjusting the pH using alkaline or acidic reagents, operators can optimize dolomite recovery conditions while minimizing interference from other minerals.
5. Magnetic separation process
Dolomite sometimes contains iron impurities, in which an electromagnetic coil generates a strong magnetic field that separates the iron-containing impurities from the dolomite. Reducing the iron impurity content, the magnetic separator can precisely separate the impurities, ensuring that only pure dolomite is collected at the end of the process.