ItemProductSurface hardnessCore hardness 1High chrome cast grinding media Hrc 58-65More than hrc 55 2Low chrome cast grinding media Hrc 48-55More than hrc 46 3Medium chrome cast grinding mediaHrc 50-60More than hrc 48 4B2 forged grinding mediaHrc 58-65More than hrc 55 5B3 forged grinding mediaHrc 58-65More than hrc 55 6Bu forged grinding mediaHrc 58-65More than hrc 55
Part characteristic The surface hardness of ball will be raised further in using the course, and the wear resistance would gather hard, so can raise mill machine production capacity at the same time, and raises cement ratio surface area and reclaim ratio of the extractive mind. Details view three W dot chinagrindingmedia dot com or Skype: kathysong0425 Specification: A: high hardness in+surface hrc 58-65 and core hrc 56-62 B: good wear resistant C: few breakages D: no mal-roundness. Woven bag or steel drum.
Our cast iron grinding balls can be divided into three categories including the high chromium type, medium chromium type and the low chromium type. 1. The quality index of the high chromium type The chromium content of the high chromium type product is greater than or equal to 10.0%. And the carbon content is between 1.80% and 3.20%. It is required by the national standard that the hardness of the high chromium type product must be no less than 58hrc, and that the impact value should be greater than or equal to 3.0j/cm. This type of product must go through the hot quenching and the tempering treatment to come up to the hardness. Currently at home, there are two quenching methods for this type of product including oil quenching and wind quenching. If the tested hardness of this type of product is below 54hrc, then it shows that the quenching treatment is omitted. 2.The quality index of the medium chromium type The medium chromium type cast iron grinding ball is defined as the chromium content ranging from 3.0% to 7.0%, and the carbon content coming between 1.80% and 3.20%. Its impact value should be no less than 2.0j/cm. . The national standard requires the hardness of this type of product should be greater than or equal to 47hrc. For ensuring the quality, the medium chromium type product should be processed with high temperature tempering to eliminate the casting stress. If the surface of the steel ball assumes the dark red color, it proves that the steel ball has been processed with high temperature tempering. If the surface of the steel ball still comes with the metal color, then, we can judge that the steel ball doesn’t go through the high temperature tempering treatment.
Shandong Huamin Steel Ball Joint-stock Co., Ltd. is the largest manufacturer and exporter of grinding balls and grinding rods, it was established in 1986, and it already have 36 years grinding media experience. Our annual production capacity is 200,000tons, and products are mainly exported to America, Canada, Chile, South Africa, Australia, Guinea, Mali, Mongolia and so on. We hold the only automatic roll forging machine for grinding steel ball in China which developed by ourselves. The raw materials that we use are high quality alloy steel. The hardness of grinding steel ball is high and steady; the toughness is good controlled by equipment. The quality of our products can meet different requirements of clients in different countries and regions. 1. Forged grinding steel balls Want higher grinding efficiency? For gold mining or cement industry? Then you can choose forged grinding steel balls, which are available in all stages of milling. Huamin forged steel ball can be divided into low carbon, medium carbon, high carbon steel ball based on the carbon percentage. The carbon content is below 1.2%. The chromium content is 0.1%-1.3%. 2. Cast grinding steel balls As another type of grinding media, cast grinding steel balls can provide Cr (1%-28%), hardness (HRC40-66), and Diameter (10mm-150mm) alloy cast steel balls. They can be divided into low chromium, medium chromium, high chromium, super high chromium grinding ball (CR20%-28%). The forged steel grinding ball is excellent in surface quality, toughness, and resistance to impact and abrasion. It won't crack and lose circularity easily. 1) In general, forged grinding steel ball has high hardness: Surface hardness to 55-67 HRC, volume hardness of 56-64 HRC 2) impact toughness high: Impact toughness more than 12 J / cm2. 3) broken rate is low: Peel fragmentation resistance property of over 20000 times. The actual breakage rate not greater than 1% and close to 0.
Introduction: Dry mill casting steel balls for grinding in power plant Size: diameter 17-150mm Description: High hardness, good wear resistance, good toughness, even wearing, no breakage. Product category: Low chromium casting grinding steel ball Hardness: hrc45-55
(1) Product Superior raw materials, advanced automated equipment, unique heat treatment technique and strict quality control system contribute to better performance for the general hardness of shandong iraeta grinding steel ball. 1) production standard Yb/t091-2005 2) size: 25-150 mm 3) surface hardness Hrc57-67 hrc 4) volume hardness Hrc56-64 5) breakage rate
Our product has precise size, high hardness, high roundness and mechanical properties. It won't deform and crack during its service life. The surface hardness of our product can reach up to 57HRC to 67HRC, and volume hardness can reach up to 56HRC to 64HRC, the difference between the hardness of surface and center are no more than 2HRC. Besides, the impact toughness of our product is greater than 12J/cm2. Further more, the breakage rate of our product is no more than 1% and are close to 0. Our product are widely used in processing facilities such as the iron&steel plant, mineral processing plant, refractory material plant and phosphate fertilizer plant, etc. Above all, all of our products can be customized according to customers’ requirements.
1. Company name: shandong huamin steel ball joint-stock co., ltd. 2. Year of established: 1986 3. Productforged steel ball, rolling forged steel balls, grinding steel balls used in the ball mill and sag 4. Diameter: 20mm to 160mm(1) 5. Material: c: 0.47-1.05 si:0.17-0.37 mn:0.5-1.0 s:0.035max p:0.035max cr:1.2max mo: 0.15max 6. Production technology: huamin mainly have three kind of production technology for forged steel balls. 1) air hammer forged steel balls 2) rolling-forged automatic production line designed by our ourselves, this production line is controlled by automatic equipment, so the hardness is high and toughness is good. 3) rotary-cut automatic production line, this production line gets five national patent. Currently, we mainly use this production line to produce forged steel balls, so the product quality is quite steady and good. 7. Inspection Huamin have a full set of inspection equipment.We can test hardness, hadness distribution, chemical composition, impact value, micro-structure, dropping test and so on. 8. Packing Huamin have two kinds of packing method: steel drums or container bags, this two kind of packing can both meet the requirement of repeated shipping and storage, customers can choose any one.
Application: Mines, cement plants, power stations Process: .Raw material .Cutting .Heated .Forged .Quenching .Tempering .Testing .Qualified products .Packing Unbreakable 0.5max Place of origin hebei, china (mainland) Brand name goldpro Model number gn-2 Application powder station, cement, mining.. Material steel Dimensions 130mm Density 7.80-7.85g/cm3 Impact to broken (times) 20, 000 Izod impact strength 12-35j/cm2 Hardness surface58-61hrc , core 56-63hrc Breakage rate real 0.3% Material b2/b4/b6/bu/65mn/60mn meet client's specical needs Standard yb/t091-2005 Packing weave bag 1000kg/bag*steel drum/850kg/drum Productive technology forging /hot-rolling Certification iso 9001-2008 ;iso14001:2004;gb/t28001-2001 1, container bag:gw 1000kg (1.5 kg/per bag) 2, iron drum: Gw 1000kg to 20mm-40mm, Gw 960kgs to 40mm-60mm, Gw 930kgs to 60mm-80mm, Gw 900kgs to 80mm-100mm, Gw 850kgs to 100mm-150mm, (18kgs/per drug)
