High Chrome Ball

Release time：2021-10-12

High chromium white cast iron grinding ball is also known as high chromium alloy cast ball, high chromium steel ball, simply called high chromium ball. At present, most of the domestic wear-resistant material enterprises are medium frequency electric furnace as the main body, through the reasonable matching of high quality scrap steel, chromium alloy material melting; As well as microalloying treatment and conditioning of hot iron; Then with a unique metal mold, sand mold casting molding process; After high temperature quenching and tempering, the martensite matrix was obtained to achieve higher hardness and wear resistance.

In terms of chemical composition, there are dozens of different materials from low chromium to high chromium. In order to standard the industry standard, let people have a clear understanding of chromium alloy cast ball from the rational, casting grinding ball GB/T17445-2009 national standard, low chromium ball chromium content 1%-3%, hardness HRC≥45; The content of ball chromium in multi-component alloys is 4%-6% and the hardness HRC≥47; Medium chromium alloy with ball chromium content of 7%-10% and hardness HRC≥48; High chromium alloy ball chromium content ≥10%-14%, hardness HRC≥58; Special high chromium ball chromium content more than 14%, hardness HRC≥58

merit

Now most of the domestic mining using low chrome steel ball as grinding medium, but because of its low product strength, poor quality, no good wear-resisting performance, cause in ore dressing process easy to broken, lead to the comprehensive benefit is greatly reduced, although the market price of the low chrome steel ball is a bit low, but from the comprehensive economic benefit analysis, high chrome ball higher performance-price ratio. The test results in various mines show that the abrasion of the original low chromium ball is about 2.0Kg, and the production of 1 million tons of fine powder requires 2000 tons of low chromium ball, with a total value of 12 million yuan. The use of high chromium ball, wear about 1.0Kg, price 9500 yuan/ton, production of 1 million tons of fine powder requires 1000 tons of high chromium ball, the total value of 9.5 million yuan, can save 3.5 million yuan. In addition, feng shape production of ZQCr10 ordinary high chromium ball, reflected in the ton of fine ore consumption cost is 9.5 yuan, and the use of low chromium ball, reflected in the ton of mine ball consumption cost is 12 yuan, ton of fine ore ball consumption cost reduced 3.5 yuan, production of 1 million tons of fine ore powder can save 3.5 million yuan, its economic benefits are very considerable. High chromium ball wear resistance is ordinary low chromium ball and forging steel ball more than 2 times. Because this kind of high chromium ball specially used for mine has good wear-resistant performance, low single-chamber abrasion and high grinding efficiency, the gradation of steel ball in the mill is stable and not easy to change, which not only increases the fineness of the powder and the output of the stage to a certain extent, but also ensures the quality of the powder. At the same time, the cycle of adding balls is extended, and the labor intensity of workers is greatly reduced, especially the number of adding balls is greatly reduced.