Low Chromium Grinding Balls
production technology
Casting steel ball (casting grinding ball) is through the use of scrap steel, alloy and other charges by medium frequency electric furnace heating up, so that the charge is fully melted, in the charge melting process with the appropriate amount of precious metal alloy (such as: Ferrochrome, ferromanganese, ferrovanadium, etc.) to the furnace for chemical composition tempering, when the hot metal temperature reaches 1550℃ or above and meets the requirements of the process regulations, the qualified hot metal is injected into the steel ball mold or steel ball production line mold, so that the steel ball smelted by casting is cast steel ball.
production Description
Low-chrome steel balls are defined as steel balls containing chromium levels of 3.0% or less, with carbon content ranging between 1.80% and 3.30%. These low-chrome steel balls serve as the vital grinding media in ball mills and find extensive applications in industries such as metallurgy, mining, cement, power generation, flue gas desulfurization, autoclaved aerated concrete production, magnetic materials, chemicals, coal-water slurry, pelletizing, slag, ultrafine powder production, fly ash, calcium carbonate, quartz sand, and more.
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Grinding media information |
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Model NO. |
Steel balls |
Material |
Chrome |
|
Content |
1%-3% |
Processing Type |
Casting |
|
Hardness |
48-55HRC |
Customized |
Customized |
|
Broken Rate |
＜0.5% |
Heat Treatment |
Oil Quenching |
|
Size |
10mm-140mm |
Color |
Black |
|
Transport Package |
Durm or Bag |
Moder No. |
Zqcr10 |
|
Trademark |
Chengda |
Specification |
Low Chrome Grinding Media |
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HS Code |
7325910000 |
Origin |
China |
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Production Capacity |
60000 Tons |
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Usage |
Construction,Machinery, chemical Petroleum, Grind,Refractory Material, Cement Plant , Mining Mill |
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CHEMICAL COMPOSITIONS(%)
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Designation |
Chemical Composition(%) |
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C |
Si |
Mn |
Cr |
Mo |
Cu |
Ni |
P |
S |
|
|
ZQCr26 |
2.0-2.6 |
≤1.0 |
0.3-1.5 |
23.0-27.0 |
≤1.0 |
≤1.0 |
≤1.0 |
≤0.06 |
≤0.06 |
|
ZQCr20 |
2.0-2.6 |
≤1.0 |
0.3-1.5 |
18.0-23.0 |
≤1.0 |
≤1.0 |
≤1.0 |
≤0.06 |
≤0.06 |
|
ZQCr15 |
2.0-2.6 |
≤1.0 |
0.3-1.5 |
14.0-18.0 |
≤1.0 |
≤1.0 |
≤1.0 |
≤0.06 |
≤0.06 |
|
ZQCr12 |
2.2-3.0 |
≤1.0 |
0.3-1.5 |
10.0-14.0 |
≤1.0 |
≤1.0 |
≤1.0 |
≤0.06 |
≤0.06 |
|
ZQCr8 |
2.2-3.0 |
≤1.0 |
0.3-1.5 |
7.0-10.0 |
≤1.0 |
≤0.8 |
≤1.0 |
≤0.06 |
≤0.06 |
|
ZQCr5 |
2.2-3.2 |
≤1.0 |
0.3-1.5 |
4.0-6.0 |
≤1.0 |
≤0.8 |
≤1.0 |
≤0.08 |
≤0.08 |
|
ZQCr2 |
2.2-3.2 |
≤1.0 |
0.3-1.5 |
1.0-3.0 |
≤1.0 |
≤0.8 |
≤1.0 |
≤0.10 |
≤0.10 |
|
ZQCADI |
3.3-3.9 |
2.4-3.0 |
1.4-1.9 |
0.2-0.5 |
≤0.5 |
0.1-0.5 |
0.1-0.5 |
≤0.05 |
≤0.05 |
MECHANICAL PROPERTIES AND MICROSTRUCTURE
|
Designation |
HRC |
AK(J/CM²) |
Microstucture |
Falling Times |
|
ZQCr28 |
≥58 |
≥4.8 |
M+C |
≥18000 |
|
ZQCr26 |
≥58 |
≥4.8 |
M+C |
≥18000 |
|
ZQCr20 |
≥59 |
≥4.8 |
M+C |
≥18000 |
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ZQCr15 |
≥60 |
≥4.8 |
M+C |
≥18000 |
|
ZQCr12 |
≥60 |
≥4.5 |
M+C |
≥18000 |
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ZQCr8 |
50-65 |
≥3.5 |
P+C/M+C |
≥12000 |
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ZQCr5 |
49-62 |
≥3.0 |
P+C/M+C |
≥12000 |
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ZQCr2 |
≥48 |
≥3.0 |
P+C |
≥10000 |
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ZQCADI |
55-60 |
≥10 |
B+Fe |
≥25000 |
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C-Carbide M-Martensite P-Pearlite B-Bainite Fe-Ferrite |
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SPECIFICATION
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Specification (mm） |
Weight of Each Ball (Kg) |
Pcs/ton |
T/m |
|
φ15 |
0.017 |
58824 |
4.94 |
|
φ17 |
0.024 |
41667 |
4.91 |
|
φ20 |
0.037 |
27027 |
4.89 |
|
φ25 |
0.070 |
14286 |
4.87 |
|
φ30 |
0.110 |
9091 |
4.85 |
|
φ40 |
0.257 |
3891 |
4.76 |
|
φ50 |
0.500 |
2000 |
4.70 |
|
φ60 |
0.867 |
1153 |
4.66 |
|
φ70 |
1.070 |
729 |
4.62 |
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φ80 |
2.050 |
487 |
4.60 |
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φ90 |
2.900 |
345 |
4.58 |
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φ100 |
4.000 |
250 |
4.56 |
|
φ110 |
5.300 |
188 |
4.55 |
|
φ120 |
6.800 |
147 |
4.54 |
|
φ125 |
7.750 |
129 |
4.52 |
|
φ130 |
8.740 |
114 |
4.50 |
Knowledge of grinding ball
what is grinding ball
Grinding balls are the media for grinding materials in ball mill equipment. The collision and friction between the steel balls of ball mills and materials produce grinding and peeling effects. Important basic components, especially precision industrial steel balls, play a huge role in the development of the national economy. effect. Widely used in cement plants, power plants, etc. High and low chromium multi-element alloy steel balls, high and low chromium multi-element alloy casting and forging.
Casting grinding ball
Casting is a process in which smelted metal liquid is poured into a mold and cooled and solidified to obtain parts with the required shape and properties.
According to the different chromium content, cast grinding balls can be divided into high chromium grinding balls, medium chromium grinding balls and low chromium grinding balls.
