Dry discharge equipment for iron tailings
China now produces about 110 million tons of iron tailings each year. If the iron tailings are processed and re-selected, the output of recovered iron concentrates is calculated at 60%, 2%-3%, and the output of iron concentrates can be increased by 3-4 million tons per year, which is equivalent to the output of no large-scale iron ore enterprises in the country, including ore concentrators. .
Generally speaking, under the current technical level, according to the different properties of iron tailings, magnetic separation, gravity separation, flotation and combined processes are used to recover and re-separate the minerals with recovery value in tailings. Turn waste into treasure.
Magnetic separation of iron tailings, three times of strong magnetic separation can obtain iron concentrate or ilmenite concentrate.
The gravity separation method generally adopts the spiral chute to pre-throw the tail, and then uses the combination of shaker or centrifuge + high-intensity magnetic separator for separation;
Flotation is regulated by these drugs and machinery. Due to the nature and nature of ore work in our country, the research methods of flotation are also different. Commonly used flotation methods include anion positive flotation, anion reverse flotation and cationic reverse flotation;
The discharge management methods of iron tailings can be divided into wet discharge and dry discharge. Wet discharge is a traditional way of life in China, which has many hidden dangers and high safety requirements for tailings ponds. The dry row method effectively learns a lot. Tailings dry discharge is a production process development method. Tailings are concentrated and dehydrated to prepare materials with a moisture content (mass effective percentage) of 10%±2, which are transported to tailings ponds and dumps for stacking or recycling.