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Jiangyin Dongbang Steel Ball Machinery Co.,Ltd
ADD:NO.42 Hua Lu Road, Huashi Town, Jiangyin City, Jiangsu Province
Tel:86-0510-86370386
Mobile:86-13812104338
Fax:86-0510-86370552
76mm Grinding Media Steel Ball for Mining
76mm Grinding Media Steel Ball For Mining Introduction Dongbang brand 76mm grinding media steel balls for mining, your best choice to reduce ball consumption 15-20% than before. Technical Datas Application: Grinding media ball for mining, like Iron Ore, Copper, Gold, Silver, etc Certification:...
76mm Grinding Media Steel Ball For Mining Introduction
Dongbang brand 76mm grinding media steel balls for mining, your best choice to reduce ball consumption 15-20% than before. 
Technical Datas
Application: Grinding media ball for mining, like Iron Ore, Copper, Gold, Silver, etc
Certification: ISO9001, ISO14001, OHSAS18001 etc.
Original: Jiangsu, China
Price: Negotiable
Payment term: TT, LC
Delivery date: Negotiable
Packing: export standard ton bag or Iron drum
Major Market: Middle East/ Africa/Asia/South America/Europe/North America
MOQ: 50 tons (2x20’GP)
Raw material: Steel rod, 75mm
Finished ball size: 78mm
Single ball weight: 1800~1950 grams
Our steel rod supplier: Only Chinese local steel mill, like Huai Steel, NISCO, etc. 
Characteristics
Steel rod type: B3,B4,B6
Detailed chemical comments as below:
| Steel Rod Type: B3, Chemical Comments | |||||
C | Si | Mn | P | S | Cr |
0.61-0.65 | 1.73-1.80 | 0.73-0.80 | ≤0.020 | ≤0.015 | 0.80-0.88 |
Ni | Cu | Mo | Alt | V | |
≤0.25 | ≤0.20 | ||||
Steel Rod Type: B4, Chemical Comments | |||||
C | Si | Mn | P | S | Cr |
0.66-0.74 | 1.2-1.4 | 0.50-0.70 | ≤0.022 | ≤0.022 | 0.85-1.0 |
Ni | Cu | Mo | Alt | V | |
≤0.40 | 0.025-0.045 | 0.05-0.15 | |||
Steel Rod Type: B6, Chemical Comments | |||||
C | Si | Mn | P | S | Cr |
0.74-0.85 | 0.15-0.35 | 0.90-1.05 | ≤0.020 | ≤0.020 | 0.88-0.98 |
Ni | Cu | Mo | Alt | V | |
≤0.25 | ≤0.25 | 0.06-0.13 | 0.025-0.045 | ||
Detailed quality parameters of 76mm(3 Inches) grinding media steel ball:
| 76mm(3”) Grinding Media Steel Ball Quality Parameter | ||||
Ball Size/Steel rod type | Surface Hardness | Core Hardness | Volume Hardness | Impact Toughness |
76mm/B3 | 61-63 HRC | 59-61 HRC | 59-62 HRC | ≥18 J/CM2 |
76mm/B4 | 61-63 HRC | 58-60 HRC | 58-62 HRC | ≥16 J/CM2 |
76mm/B6 | 61-64 HRC | 59-62 HRC | 59-62 HRC | ≥18 J/CM2 |
76mm grinding medial steel ball 6 meter fall drop test: More than 20,000 times, No Break
We request our local steel rod promise us on compressional rate ? See below picture:
Why do we request the compression rate 15 time at least ? Because we need to promise the steel rod have a high density to match the hot rolling method.
Our production flow picture on 76mm grinding media steel balls for mining:
1.Steel rod automatic feeding to induction;
2.Steel rod heating to requested temperature by induction furnace;
3.Heated steel rod go into hot rolling machine to make grinding balls;
4.Hot grinding balls slow cooling on convey;
5.Grinding balls cools to right temperature and go into quenching system;
6.Grinding balls after quenching, cool again by convey and send into automatic tempering furnace;
7.Grinding balls do tempering treatment by correct temperature and time upon ball size in automatic tempering furnace, go into cooling plate;
8.Grinding balls after tempering treatment, will cool to room temperature;
9.Do the packing for grinding balls, in ton bag or iron drum.
FAQ
1. Q:What is the delivery time of your grinding media balls?
A:In general, the delivery time of our grinding media balls is about 20-60 days upon the order qty and ball size. We will confirm you our soonest delivery date before we sign the PO.
2. Q:Can the grinding media balls be customized as our need, such as a new chemical on raw meterial?
A:Surely, our grinding media balls can be customized as your need, we will cooperate with our steel rod supplier to develop a new chemical on raw material.
3. Q:As the shipping period will take long time, how do you pack grinding media balls?
A:Our grinding media balls will be packed into ton bag or iron drum, which can promise the balls fixed during the long time shipping on sea.
4. Q: May I know which payment will be accepted by your company?
A:So far 100% T/T before shipment, and 30% deposit paid by T/T, balance paid by L/C are available.
