Ball iron is a type of iron used in grinding and milling industries, with sizes ranging from 0.6-4.7 inches. Chromium is added to increase strength and resistance to fracture. It is used in cement, flour milling, coal milling, and mineral processing industries. The product is exported to various countries, and quality control measures are taken to ensure uniformity. The iron ball is given an ellipsoidal shape for more effective grinding ability. It is referred to as a wear-resistant material due to its durability.
Ball iron is a specialized form of iron shaped into balls and used in the grinding and milling industry for a variety of purposes. Although many industrial applications require the grinding of steel balls, ball iron is still used and in high demand in regions such as China and other Asian nations. Adding key elements such as chromium into the iron ball in the manufacturing process gives it higher strength and resistance to fracture.
The grinding balls can range in size from approximately 0.6-4.7 inches in diameter (15-120 millimeters). Trace elements added include carbon and chromium. The higher the chromium content, which can be up to 30% of the ball’s mass, the stronger it is.
Many key industries make extensive use of iron balls, the main one being the cement industry where they are used to grind lumps of lime known as clinkers which are formed during sintering. Other manufacturing industries that use the iron ball include raw flour milling and coal milling both for supplying power plant fuels and in the mining industry. One of the major producers produces 7,000 tons a year and exports 80% of it to various countries around the world. Other companies export iron balls in the range of 4,500 to 12,000 tons annually, with some capable of producing 50,000 tons annually to nations and regions including South America, Europe, South Africa, and the Philippines.
Small and large ball mills also use the iron ball in processing materials. These materials are produced as fine powders in chemical engineering factories. Companies specializing in mineral processing equipment for these factories sell iron balls and, along with it, various other types of milling balls including those made of high alloy steel, carbon alloy steel, nickel-strengthened iron, and steel-strengthened with manganese. They also perform quality control using chemical, mechanical and metallographic tests and even ultrasound examinations to ensure that the product is uniform.
Although ball iron can be shaped spherically, it is given an ellipsoidal or egg shape for more effective grinding ability when used in large quantities. A typical minimum order quantity for a supply is 20 tons, although the price per ton is quite low. In industry, spherical iron is sometimes referred to as a wear-resistant material due to its durability. It won’t crack or break even if it falls from a considerable distance, due to repeated drop tests during the manufacturing process.
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