A Comprehensive Learning Of The Grinding Machine

A grinding machine, often shortened to grinder

, is a machine tool used for grinding, which is a type of machining using an abrasive wheel as the cutting tool. Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation.

The grinding machine consists of a power driven grinding wheel spinning at the required speed (which is determined by the wheels diameter and manufacturers rating, usually by a formula) and a bed with a fixture to guide and hold the work-piece. The grinding head can be controlled to travel across a fixed work piece or the workpiece can be moved whilst the grind head stays in a fixed position. Very fine control of the grinding head or tables position is possible using a vernier calibrated hand wheel, or using the features of numerical controls.

Grinding machines remove material from the workpiece by abrasion, which can generate substantial amounts of heat; they therefore incorporate a coolant to cool the workpiece so that it does not overheat and go outside its tolerance. The coolant also benefits the machinist as the heat generated may cause burns in some cases. In very high-precision grinding machines (most cylindrical and surface grinders) the final grinding stages are usually set up so that they remove about 200 nm (less than 1/100000 in) per pass - this generates so little heat that even with no coolant, the temperature rise is negligible.

Refractory iron ore belongs to poor fine miscellaneous ores with complex composition, there is a lot of difficulty to improve ore grade by traditional dressing recovery way, while grinding fineness is a key factor. For example, Qidong iron ore asks grinding fineness -38 um 95% ~ 98%, Shanxi Yuanjiacun iron ore asks -38 um 95%, as well as Shizhuyuan solid non-ferrous metal ore and Ruyang molybdenum mine ask grinding fineness in tailings recovery - 38um 95%. Therefore, regrinding or fine grinding equipment is essential. Many of our mining industry produce iron ore by ordinary horizontal ball mill, while the ordinary horizontal ball mill has low efficiency, the product particle size and mineral monomer dissociation cannot reach requirement.

Vertical screw mixing mill is regrinding and fine grinding equipment with the most promising development prospect, high energy efficiency and fine granularity. In addition, because of its simple structure and convenient operation and maintenance, it is widely used in the industrial production of gold ore, nonferrous metal ore, metal ore and magnetic materials.

Golden is wrapped in pyrite, existing in the form of microscopic gold, sub-microscopic gold or solid solution, and insolubly extracted. Vertical screw mixing mill strongly destruct material interface layer in the process of leaching while pulverizing thus speeding up the chemical reaction rate and improving the leaching rate. It has been successfully applied in many gold enterprises.

Cement production line : http://www.china-crusher.com/stone-production-line.html

Ball mills : http://www.mine-crusher.com/ballmill.htm

by: libby

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