Steel Ball

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Ball mill use of steel ball

Ball mill Ball is a grinding medium used to grind ore blocks in cylindrical ball mill. It is widely used in iron ore and non-ferrous metal concentrator, cement plant, thermal power plant, refractories plant, steel plant, phosphate fertilizer plant, etc. Grinding industry. Ball mill ball in this grinding ore block, but also their own wear and tear continue to become smaller, until the failure, it consumes great.

At present, China consumes about 4 million tons of steel ball annually, mainly for casting iron balls and forging steel balls. Specifications Ball mill commonly used ball diameter of steel ball Φ20mm ~ Φ125mm, super-large ball mill used ball diameter of Φ130mm ~ Φ150mm. Ball milling steel ball production process are: casting iron ball, forging steel ball, rolling steel ball casting iron ball Process advantages: simple equipment, low investment. Production technology and operation easy to grasp; for more specifications, small quantities of orders, arrange production easy and flexible. Process shortcomings: Casting defects (pores, trachoma, inclusions, surface, cracks, etc.); low density, small proportion; coarse metal grains, impact toughness is poor (usually 3 ~ 7J / cm2); high energy consumption, metal income Low rate; Φ40mm below the ball casting difficult. Forging steel ball Process advantages: less investment, quick start, raw materials can be used hot-rolled bar, hot-rolled billets can also be used, the billet length is not limited, the production is easy to organize. Process defects: difficult to control the quality of production is stable; manual cutting, single different; easy to cause steel ball surface folding; heating defects, oxidation decarburization, grain coarsening, and even overheating, over burning, heat treatment of unstable quality; Large temperature difference, quenching heat treatment of unstable quality; product hardness, hardenability and impact toughness can not guarantee stability; low efficiency, high cost. Rolling steel ball process advantages: high production efficiency, large output, suitable for large-scale modern labor-saving steel ball factory; rolling ball production mechanization, high degree of automation; quality and stability, steel ball hardness, poor internal and external hardness, high impact toughness, Big proportion. Technical shortcomings: a large investment in plant construction; high technological content; multi-standard, small quantities have a certain degree of difficulty, not suitable for frequent replacement of small quantities of product specifications.

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