During blast furnace production, iron ore, coke, and slag flux (limestone) are loaded from the top of the furnace. The loading trolley plays an important role as the main means of transportation. Since most of the ore and coke loaded in the car have relatively sharp edges, the lining of the trolley is seriously worn and eroded. At the same time, due to the heavy weight of the trolley, the wire rope, reducer, and other loads are large, and failures are very likely to occur, causing significant economic losses. Therefore, to improve the service life of the trolley, it is necessary to solve the problems of erosion resistance, wear resistance, and the dead weight of the trolley lining. After comparative experiments by multiple companies, the use of wear-resistant ceramic linings is very effective.
Wear-resistant ceramic linings use aluminum oxide as the main raw material and rare metal oxides as flux. After high-temperature sintering at 1700℃, they are combined with special rubber and high-strength organic adhesives, respectively. Wear-resistant ceramic linings can also be used alone as linings. The wear-resistant ceramic lining has a high hardness, Rockwell hardness of 80-90, which is harder than minerals such as ore and coal ash; it has strong wear resistance, and its wear resistance is equivalent to 266 times that of steel plates. It has a low density and is easy to process. It can be cut when vulcanized with rubber, and can be twisted and assembled, without being restricted by the shape, size, and installation location of the equipment.
The wear-resistant ceramic lining can only achieve the effect of ceramic sheets being firm and not falling off if it is operated according to a strict pasting process. First, use a sandblasting gun, angle machine, or wire brush to clean the surface to be pasted to make it present a metallic luster. The rougher and cleaner the surface, the better the pasting effect; then use alcohol to clean the surface to be pasted to remove surface oil; mix the adhesive evenly in a certain proportion and apply it to the surface to be pasted, and then paste the wear-resistant ceramic linings one by one, and knock with a rubber hammer to make them in close contact.
After using the wear-resistant ceramic lining, the weight of the blast furnace charging trolley is reduced, which reduces the load on the main winding motor and reducer, and also reduces the wear on the wire rope and rail. The wear-resistant ceramic lining is used as the lining of the blast furnace charging trolley, which reduces the wear of the equipment, improves the reliability of the blast furnace charging equipment, and ensures the stable and high production of the blast furnace.
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