Electric furnace slag is a solid waste discharged from the process of smelting metal by electric furnace, and its main components are oxides such as calcium, iron, copper, silicon, magnesium, aluminum, manganese, and phosphorus. The common ones are steel-making electric slag and copper-smelting electric slag. At present, environmental protection is strengthened, and electric furnace slag materials can also be recycled after treatment. So what is the recycling process?
- The recovery value of electric furnace slag
The smelting plant produces a lot of electric furnace slag during the smelting process. The smelting of one ton of pig iron can produce 0.3-1 tons of electric furnace slag, and the smelting of one ton of anode copper can produce 5-6 tons of electric furnace slag. The pollution to the environment is very large.
Slag can be used to produce cement, heat preservation and heat insulation materials in buildings, flux in smelting or mold slag for casting steel ingots, and water quenching slag from copper smelting can also be used as sandblasting material. However, this all needs to be established on the premise that the electric furnace slag has been crushed and processed. - The electric furnace slag crushing process
The process flow of the electric furnace slag processing production line can be roughly divided into five parts: feeding, crushing, sorting, grinding, and finished products.
1) Feeding
The electric furnace slag is brought to the slag yard by the tanker, cooled with cold water, then stacked in the yard, and fed to the crushing equipment by the vibrating feeder.
2) Broken
The crushing of the electric furnace slag needs to go through the process of coarse and medium crushing. The hardness of the electric furnace slag is relatively large, so it is generally processed by a jaw crusher.
3) Grinding
The particle size of the broken electric furnace slag cannot reach the accuracy of selection, so it needs to be ground with a ball mill for further fine crushing.
4) Selection
There are also many magnetic materials in the electric furnace slag, and the iron fine powder can be separated from the slag by using a magnetic separator.
5) Finished product
After sorting, the slag powder can be collected by the powder separator and sent to the finished material tank by the elevator for other purposes. - Electric furnace slag crusher
When crushing electric furnace slag, we usually use a combination of coarse crushing jaw crusher and fine crushing jaw crusher.
Jaw crusher is very widely used equipment in crushing equipment. Its structure is compact and simple. The movable jaw, jaw plate and heavy eccentric shaft made of high manganese steel ensure its durability and reliability. Long-term stable work is guaranteed.
The requirements for the crushing process of the electric furnace slag are not strict, and the more it is to crush the slag to less than 20mm, which can meet the feeding requirements of the ball mill. The coarse and fine crushing jaw crusher not only has a large crushing ratio, but also has a large feeding port and a large adjustment range of the discharging port, which can fully meet the feeding requirements of the ball mill.