Introduction of manufacturing process of casting grinding ball, rolling ball, forging ball
These kinds of wear-resistant grinding balls are used in wear-resistant industries, wear-resistant steel ball types. Today, we will introduce the production process of several kinds of grinding ball.
Air Hammer forging steel ball main production process:
Round steel bars are cut according to ball size after passing the inspection; Steel is heated to a certain temperature by a medium frequency furnace to ensure an effective forming variable in the forging; the red-hot steel forging is fed into an air hammer and is knocked over by a skilled operator. After forging, the red-hot steel balls are quenched and tempered immediately in the heat treatment equipment to obtain high and uniform hardness.
The production process of casting grinding balls:
The casting grinding ball is a kind of grinding balls which uses the medium frequency electric furnace to melt the scrap steel, scrap iron and so on. The furnace charge is fully melted and the precious metal alloy (such as ferrochromium, Ferromanganese, ferrovanadium, etc.) is added to the furnace for chemical composition conditioning. After heating, the qualified molten iron is poured into the steel ball metal mold or automatic steel ball production line’s mold when the molten iron temperature reaches above 1550°C so that meets the technical requirements.
After molding, then start to heat treatment. It includes quenching parts and tempering parts. For quenching, it also divides into oil quench, air quench according to the different composition of balls.
For casting grinding balls, there are also two types. One is the white cast iron with chromium as the main alloy element, which is called Chromium Alloy cast iron. It means the balls made of chromium alloy cast iron(chrome grinding balls); another type is made of nodular cast iron (called nodular cast iron grinding ball). The Matrix obtained by heat treatment is mainly Bainite spheroidal graphite cast iron grinding ball referred to as Bainite spheroidal graphite iron grinding ball; The Matrix obtained by heat treatment is mainly a martensite spheroidal graphite cast iron grinding ball referred to as the Martensite Ball.
The grinding balls, including casting type and forging type, widely used in metallurgical mines, cement building materials, thermal power generation, flue gas desulphurization, magnetic materials, chemicals, coal-water slurry, pellets, slag, ultra-fine powder, fly ash, calcium carbonate, quartz sand and other industries ball mill.