20mm-150mm Forging Steel Balls Cement Grinding Balls Cast Iron Balls
1. The main product of Dragon balls- Cast balls, cylpebs Specifications:
① The Abrasion of the cast balls when grinding the cement
| Material | Abrasion | Breakage | Size(mm) |
| Low Chrome Cast Ball | 85-105g Cast Balls /Ton Cement | <2% | 10-150mm |
| Medium Chrome Cast Ball | 50-80g Cast Balls /Ton Cement | <1.5% | 10-150mm |
| High Chrome Cast Ball | 35-60g Cast Balls/Ton Cement | <1% | 10-120mm |
| High Chrome Cylpebs | 35-60g Cylpebs/Ton Cement | <1.5% | 12×18-35×40 |
| Low Chrome Cylpebs | 65-95g Cylpebs/Ton Cement | <1% | 12×18-35×40 |
| Micro Cylpebs | 6×6 8×8 10×10 12×12 15×15
|
② Chemical Composition
| Material | Chemical Composition |
| Low Cr | C:2.2-3.4, Si:≤1.2, Mn:0.5-1.5, P:≤0.06, S:≤0.06, Cr:1.0-1.5 |
| Medium Cr | C:2.0-3.2, Si:<1.0, Mn:0.5-2.5, P:≤0.06, S:≤0.06, Cr:≥5 |
| High Cr | C:2.0-3.2, Si:<1.0, Mn:0.5-2.5, P:≤0.06, S:≤0.06, Cr:≥10 |
③ Hardness
| Type | Low Cr | Medium Cr | High Cr |
| 20mm-150mm | 45-50 | 48-55 | 58-63 |
④ Dragon Balls Weight
| Size(mm) | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 110 | 120 | 130 | 140 | 150 |
| Weight(kg) | 0.033 | 0.111 | 0.261 | 0.512 | 0.883 | 1.402 | 2.092 | 2.98 | 1.087 | 5.44 | 7.062 | 9.008 | 11.25 | 13.83 |
⑤ Dragon balls specifications
| Diameter (mm) | Diameter Tolerance (mm) | Approx Weight of per ball(kg) | Average numbers per ton |
| 20 | ＋1,－0.5 | 0.033 | 30303 |
| 30 | ＋2,－1 | 0.11 | 9090 |
| 40 | ＋2,－1 | 0.261 | 3831 |
| 50 | ＋2,－1 | 0.512 | 1961 |
| 60 | ＋2,－1 | 0.883 | 1132 |
| 70 | ＋3,－1.5 | 1.402 | 713 |
| 80 | ＋3,－1.5 | 2.092 | 478 |
| 90 | ＋3,－1.5 | 2.98 | 335 |
| 100 | ＋3,－1.5 | 1.087 | 244 |
| 110 | ＋3,－1.5 | 5.44 | 183 |
| 120 | ＋3,－1.5 | 7.062 | 141 |
⑥ Grinding cylpebs Size(mm)
| 6×6 | 8×8 | 10×10 | 15×15 | 12×18 | 20×35 | 22×30 |
| 25×25 | 25×30 | 25×35 | 30×35 | 30×40 | 35×40 | 35×45 |
⑦ Production Process
Cast Balls and cylpebs are melted in electric furnace and poured into moulds after scientific proportioning. High chromium balls and cylpebs are also processed by oil quenching.
2. forged steel grinding media balls specifications:
① Chemical Composition
| Material | Chemical Composition |
| C | Si | Mn | Cr | P | S | Ni | Cu |
| C45 | 0.42-0.5 | 0.17-0.37 | 0.5-0.8 | ≤0.25 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 |
| 60Mn | 0.55-0.65 | 0.17-0.37 | 0.7-1.0 | ≤0.25 | <0.04 | <0.04 | ≤0.3 | ≤0.25 |
| B2 | 0.72-0.85 | 0.17-0.37 | 0.7-1.0 | 0.4-0.6 | ≤0.025 | ≤0.025 | ≤0.02 | ≤0.02 |
| B3 | 0.58-0.66 | 1.3-1.9 | 0.65-0.8 | 0.7-0.9 | ≤0.025 | ≤0.025 | ≤0.02 | ≤0.02 |
② Hardness
| Size | C45 | 60Mn | B2 | B3 |
| 20mm | 55-58 | 58-62 | 60-64 | 62-65 |
| 30mm | 55-58 | 58-62 | 60-64 | 62-65 |
| 40mm | 55-58 | 58-62 | 60-64 | 62-65 |
| 50mm | 55-58 | 58-62 | 60-64 | 62-65 |
| 60mm | 55-58 | 58-62 | 60-64 | 62-65 |
| 70mm | 53-56 | 58-62 | 60-64 | 61-63 |
| 80mm | 53-56 | 58-62 | 59-63 | 60-65 |
| 90mm | 50-55 | 58-62 | 57-61 | 60-65 |
| 100mm | 48-52 | 57-61 | 56-60 | 60-65 |
| 110mm | 48-52 | 57-61 | 55-60 | 58-64 |
| 120mm | 48-52 | 57-61 | 55-60 | 56-63 |
| 130mm | 48-52 | 57-61 | 55-60 | 56-63 |
| 140mm | 48-42 | 57-61 | 55-60 | 56-63 |
| 150mm | 48-52 | 57-61 | 55-60 | 56-63 |
③ Weight
| Size(mm) | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | 110 | 120 | 130 | 140 | 150 |
| Weight(kg) | 0.033 | 0.111 | 0.261 | 0.512 | 0.883 | 1.402 | 2.092 | 2.98 | 1.087 | 5.44 | 7.062 | 9.008 | 11.25 | 13.83 |
④ Dragon balls specifications
| Diameter (mm) | Diameter Tolerance (mm) | Approx Weight of per ball(kg) | Average numbers per ton |
| 20 | ＋1,－0.5 | 0.033 | 30303 |
| 30 | ＋2,－1 | 0.11 | 9090 |
| 40 | ＋2,－1 | 0.261 | 3831 |
| 50 | ＋2,－1 | 0.512 | 1961 |
| 60 | ＋2,－1 | 0.883 | 1132 |
| 70 | ＋3,－1.5 | 1.402 | 713 |
| 80 | ＋3,－1.5 | 2.092 | 478 |
| 90 | ＋3,－1.5 | 2.98 | 335 |
| 100 | ＋3,－1.5 | 1.087 | 244 |
| 110 | ＋3,－1.5 | 5.44 | 183 |
| 120 | ＋3,－1.5 | 7.062 | 141 |
⑤ Grinding rods size
| Diameter | 30mm-90mm |
| Length | 3.2 m-4.5 m
|
3. Cement Grinding Balls Classification:
Forged ball
Hot rolling ball
Cast iron ball
Cylpebs
Grinding rods
4. The difference of the forged ball and cast ball
① Different production line
② Different raw material
③ Different chemical element
④ Different core hardness and core hardness
5. Quality Control
① Factory Test
Grinding cylpebs test is an very important step. Real-time detection will be carried out in the production process. Cylpebs produced in each shift will be sampled in large quantities and tested for size, hardness, chemical composition, drop test, core pulling and impact value to ensure the quality of cylpebs
② The third party test
According to the customer different demand, cylpebs can be tested by any third party.
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