Grinding Balls(Grinding Media)

Grinding balls also called grinding media, are Widely used in grinding, crushing, and mixing of various materials. Grinding balls are usually used in ball mills, tube mills, sand mills, and other equipment to achieve the purpose of crushing, dispersing, and mixing by impacting and rubbing with materials. They are important tools in many manufacturing industries, especially in mining, chemikálie, keramika, coatings, hutnictví, a další průmyslová odvětví, where grinding balls are indispensable.

Uses of grinding balls

Size Reduction: Grinding balls help break down large pieces of raw materials into smaller, more manageable sizes.
Homogenization: A uniform particle size distribution is critical in many manufacturing processes. Grinding balls ensure that particles are evenly ground, resulting in consistent product quality.
Surface Area Enhancement: Finer particles have a greater surface area, which can significantly increase the efficiency of chemical reactions. This is critical in industries such as cement production, where reactions between raw materials such as limestone and clay must be optimized.
Grinding Process Efficiency: Grinding balls are an integral part of various grinding processes, including ball milling, which is widely used in mineral processing, keramika, and fireworks manufacturing. The balls act as a grinding medium, helping to pulverize the processed material.

Technique data of grinding media

size of grinding balls

Diameter,mm	30	40	50	60	70	80	90	100	110	120	125	150
Diameter, mm	±2				+3，-2			+4，-3				+5，-4
Roundness(%)	≤2				≤3			≤4				≤5

Chemical composition of forged steel grinding ball

Položka	C（%）	Si（%）	Mn（%）	Cr（%）	Cu（%）	Mo（%）	P（%）	S（%）	Ni(%)
RS-1	0.42-0.50	0.17-0.37	0.5-0.80	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
RS-2	0.37-0.44	0.17-0.37	0.7-1.0	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
RS-3	0.48-0.56	0.17-0.37	0.60-1.0	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
RS-4	0.57-0.65	0.17-0.37	0.70-1.0	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
RS-5	0.62-0.70	0.17-0.37	0.90-1.0	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
RS-6	0.67-0.75	0.17-0.37	0.90-1.20	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
RS-7	0.37-0.45	0.17-0.37	0.50-0.8	0.80-1.1	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
RS-8	0.38-0.45	0.17-0.37	0.50-0.80	0.90-1.2	0-0.03	0.15-0.25	0-0.035	0-0.035	0-0.30
RS-9	0.65-0.75	0.20-0.30	0.75-0.90	0.55-0.70	0-0.25	0-0.30	0-0.030	0-0.030	0-0.30
RS-10	0.37-0.44	0.17-0.37	1.4-1.8	0-0.25	0-0.25	0-0.30	0-0.035	0-0.30	0-0.30
RS-11	0.65-0.75	0.20-0.45	1.4-1.8	0-0.25	0-0.25	0-0.30	0-0.035	0-0.030	0-0.30
RS-12	0.52-0.65	0.17-0.37	0.60-1.2	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
RS-13	0.70-0.80	0.17-0.37	0.70-0.80	0.50-0.60	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
RS-14	0.58-0.66	1.2-1.6	0.65-0.80	0.70-0.90	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
RS-15	0.60-0.65	1.6-1.7	0.7-0.8	0.7-0.8	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
RS-16	0.75-0.85	0.2-0.40	0.9-1.0	0.85-0.95	0-0.25	0.06-0.13	0-0.035	02-0.035	0.06-0.13
RS-17	0.82-0.95	0.20-0.40	0.92-1.02	0.80-0.95	0-0.25	0.06-0.10	0-0.035	0-0.035	0.06-0.10
RS-18	0.35-0.40	0.17-0.37	0.7-0.8	0.9-1.0	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
RS-19	0.95-1.05	0.17-0.37	0.9-1.10	0.40-0.60	0-0.15	0-0.05	0-0.035	0-0.035	0-0.30
RS-20	0.95-1.05	0.15-0.35	0.20-0.40	1.30-1.65	0-0.25	0-0.10	0-0.027	0-0.020	0-0.10

Technical specification of cast grinding ball

Položka	Breakage rate	Hardness	Impact value	Drop times	Micro structure
		(HRC)	(J/cm2）	(times)
RS-1	<1%	≥45	≥12	≥8000	M+C
RS-2	<1%	≥50	≥12	≥10000	M+C
RS-3	<1%	≥55	≥12	≥10000	M+C
RS-4	<1%	≥55	≥12	≥12000	M+C
RS-5	<1%	≥58	≥12	≥12000	M+C
RS-6	<1%	≥60	≥12	≥12000	M+C
RS-7	<1%	≥55	≥12	≥12000	M+C
RS-8	<1%	≥55	≥12	≥12000	M+C
RS-9	<1%	≥58	≥12	≥12000	M+C
RS-10	<1%	≥55	≥12	≥12000	M+C
RS-11	<1%	≥58	≥12	≥12000	M+C
RS-12	<1%	≥55	≥12	≥12000	M+C
RS-13	<1%	≥58	≥12	≥15000	M+C
RS-14	<1%	≥60	≥12	≥15000	M+C
RS-15	<1%	≥60	≥12	≥15000	M+C
RS-16	<1%	≥60	≥12	≥15000	M+C
RS-17	<1%	≥60	≥12	≥15000	M+C
RS-18	<1%	≥60	≥12	≥15000	M+C
RS-19	<1%	≥60	≥12	≥15000	M+C
RS-20	<1%	≥60	≥12	≥15000	M+C

Grinding ball manufacturing

Material Selection: The first step is to select the right material based on the intended use. Consider factors such as hardness, odolnost proti opotřebení, and impact strength.
Smelting and Casting: For cast iron and some steel grinding balls, the selected material is melted in a furnace and poured into a mold to form a spherical shape. The casting process can produce balls with consistent size and performance.
Forging: Forged steel grinding balls are made by heating a steel billet and shaping it into a sphere using a mechanical forging press; this process enhances the toughness and impact resistance of the ball.
Heat Treatment: After casting or forging, the grinding balls undergo heat treatment processes such as quenching and tempering. This can increase the hardness and wear resistance of the grinding balls, ensuring that the grinding balls can withstand rigorous grinding operations.
Quality Control: Throughout the manufacturing process, we implement strict quality control measures to ensure that the grinding balls meet industry standards; this includes testing for hardness, odolnost proti nárazu, and dimensional accuracy.