High Abrasion-Resistant High Chrome Cast Grinding Steel Ball & Cylpebs for Cement Ball Mill

Product Introduction

Product Overview

Also called a tube grinder, the cement ball mill is a grinder with several chambers. A mill whose aspect ratio is above 4 is known as a long mill or tube mill. Cement plants commonly use medium and long mills, which are usually divided inside into 2-4 compartments.
Modern industry counts the tube mill among its key pieces of fine grinding equipment, and it is one of the most common and important machines in grinding systems. Large tube mills offer high production capacity. Its features are a high crushing ratio, high production capacity, strong adaptability to materials and easy replacement of worn parts. A tube mill mainly consists of a cylinder, a feeding section, an unloading section, a transmission section and so on.
Balls or cylpebs, the grinding media, are carriers that help crush & grind minerals in a ball mill. In a cement ball mill, large balls or cylpebs go into the first chamber and small cylpebs into the second. Cylpebs are cylindrical, and this shape grinds more efficiently than small balls. Super high chromium (Cr: 16-28%) cast grinding balls and cylpebs combine high hardness (HRC 58-67) with lower grinding media consumption, making them the best choice for cement and for other highly hard minerals such as Lead-Zinc ore and Quartz sand.

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Core Features
Application Scenarios
Product Characteristics
Customization Options

Key Advantages

Reduced consumption cost
High-chromium grinding media are harder than forged steel cylpebs and can be produced with various chromium contents (10-28%). In ball mills, they are consumed at only 25%-65% of the rate of forged steel and lower-chrome cast cylpebs. For special minerals of the highest hardness, such as Quartz sand, select Top chromium (Cr: 23-28%) cast grinding media, whose consumption cost is far lower than that of other grinding media.

Greater hardness
After special heat treatment (Oil quench & annealing), High Chrome cast grinding cylinders reach the highest hardness (HRC 64- 67). Small cast cylinders of Φ6*6 - Φ30*35 mm can reach HRC 66, and cast cylinders of Φ30*35 - Φ55*60 mm can reach HRC64. This is the highest hardness among grinding media of any material. In addition, the hardness difference between the surface and the core of these cast high chrome cylinders is under HRC 2.

Tailored alloy steel composition
To meet customer requirements, the NGZR foundry can adjust the chromium content (1.0-30%) of the chemical composition, along with other useful alloying elements such as C /Mn/ Si/ Cu/ Ni/ Mo etc. Together with special heat treatment, this gives the cast grinding cylinders different technical parameters, such as hardness / Impact Value / Breakage and de-shaping rate / micro- structure / resistance to high PH acid or alkali / high temperature resistance etc, to satisfy the customer's special needs.

Custom grinding media shapes
NGZR can design and produce grinding media in a variety of shapes: Grinding balls (Sphere), Grinding cylpebs ( Cylinder), Grinding eggs ( Ellipsoid), Polyhedron shapes and other special customized forms. Under different grinding conditions, different shapes give a better grinding effect.

Lower breakage & out-of-roundness rates
Thanks to controlled raw material quality, advanced casting equipment and special heat treatment, NGZR high chrome grinding cylinders have good physical properties. Large cast grinding media show a breakage & out-of-roundness rate below 1%, and small cast balls show one below 0.5%.

Alloy Chemical Composition:
Cast grinding ball Name	Item	Chemical Composition ( % )
		C	Si	Mn	Cr	Mo	Cu	Ni	P	S
Top Chrome	ZQCr23	2.1-3.3	≤1.2	0.2-1.5	23 - 30	≤1.0	≤1.0	≤1.0	≤0.06	≤0.06
Super Chrome	ZQCr18	2.1-3.5	≤1.2	0.2-1.5	18 - 23	≤1.0	≤1.0	≤1.0	≤0.06	≤0.06
High Chrome	ZQCr10	2.1-3.6	≤1.2	0.2-1.5	10 - 15	≤1.0	≤1.0	≤1.0	≤0.06	≤0.06
Middle Chrome	ZQCr 5	2.1-3.6	≤1.5	0.2-1.5	4.0-6.0	≤1.0	≤0.8	-	≤0.08	≤0.08
Low Chrome	ZQCr 1	2.1-3.6	≤1.5	0.2-1.5	1.0-3.0	≤1.0	≤0.8	-	≤0.10	≤0.10

Product Physical Technical:
Cast grinding ball Name	Item	Physical Technical
		Surface Hardness	Breakage Rate	Impact fatigue Falling ball times	Impact Value ( J /cm2 )	Micro- structure
High Chrome Ultra	ZQCr23	HRC ≥ 62	≤ 1.0 %	≥ 15000	≥ 3.0	M +C
High Chrome Plus	ZQCr18	HRC ≥ 60	≤ 1.0 %	≥ 15000	≥ 3.0	M +C
High Chrome	ZQCr10	HRC ≥ 58	≤ 1.0 %	≥ 15000	≥ 3.0	M +C
Middle Chrome	ZQCr 5	HRC ≥ 47	≤ 2.0 %	≥ 8000	≥ 2.0	P +C
Low Chrome	ZQCr 1	HRC ≥ 45	≤ 2.0 %	≥ 8000	≥1.6	P +C
Remark: M= Martensite ; C= Carbide ; P= Pearlite ; AF= Acicular Ferrite ; GJS= spheroidal graphite

Existing Product Size & Tolerance:

Product Size

Φ（mm）

Φ6 / Φ8 /Φ10 Φ12.5/ Φ15/

Φ17.5 /Φ20 / Φ25/ Φ30

Φ40 / Φ50

/Φ60

Φ70 /

Φ80

Φ90 /

Φ100

Φ110 /

Φ120

Φ125/Φ130/

Φ140 /Φ150

Diameter Tolerance

+ 1.0 mm

- 1.0 mm

+ 1.5 mm

- 1.0 mm

+ 2.0 mm

- 1.0 mm

+ 2.5 mm

- 1.0 mm

+ 3.0 mm

- 1.0 mm

+ 3.5 mm

- 2.0 mm

Remark: NGZR can customize any ball size from Φ6 to Φ150 mm by casting ;

Product Weight:
Size (mm)	Φ6*8	Φ8*10	Φ10*12	Φ12*14	Φ14*16	Φ16*18	Φ18*20	Φ20*25
Weight (kg /pcs)	0.002	0.006	0.011	0.017	0.025	0.035	0.050	0.095
Q’ty (pcs) per mt	500,000	150,000	90,000	55,000	38,000	26,000	20,000	10,000
55*60
Size (mm)	Φ25*30	Φ30*35	Φ35*40	Φ40*45	Φ45*50	Φ50*55	Φ55*60	Φ60*70
Weight (kg/pcs)	0.165	0.260	0.4	0.55	0.765	1.02	1.32	2.1
Q’ty (pcs) per mt	6000	3800	2500	1800	1300	980	750	476

Anhui Ningguo Zhongrui Wear-Resistant Materials Co., Ltd.

About Us

Anhui Province's Ningguo City Zhongrui Wear-resistant Materials Co., Ltd. is located in Ningguo City, which is known as the capital of wear-resistant castings in China. The company mainly produces high-chromium, medium-chromium, and low-chromium alloy cast balls, cast sections; ball mill liners; crusher guards, hammers, etc. It also has a casting ball workshop, casting workshop, white mold cutting workshop, heat treatment workshop, raw material workshop, finished product workshop, and physical property testing room.
As professional China High Abrasion-Resistant High Chrome Cast Grinding Steel Ball & Cylpebs for Cement Ball Mill Factory and Custom Cement Mill Wear Parts Manufacturers, the company is equipped with 2 fully automatic iron mold sand coating production lines, 4 mechanical arm shell molding machines, 1 fully automatic lost foam mold production line, 1 fully automatic heat treatment quenching + reheat treatment production line, 2 automatic flipping annealing furnaces, 3 sets of VIP-1800 series melting furnaces, cabinet-type PRO spectrometer, carbon-sulfur analyzer, hardness tester, far-infrared temperature measuring instrument, etc. The production and testing equipment is complete and comprehensive. Temperature-controlled melting, constant-temperature pouring, automatic temperature-controlled quenching, and annealing have been achieved, and many technologies are at the forefront of the industry.
The product specifications are complete, meeting the needs of customers for different materials of cast balls, cast sections, ball mill liners, crusher guards, hammers, etc., ranging from Ф8mm to Ф150mm. The company now has an annual production capacity of 60,000 tons of cast balls and castings.
In its development, the enterprise has always adhered to the development strategy of "using science and technology to build the enterprise" and "strengthening innovation to build the enterprise". It has continuously strengthened service awareness and quality awareness, and has successively obtained ISO9001 quality certification, ISO14001 environmental certification, ISO45001 occupational health and safety management certification; and has received many certificates such as "Safety Production Standardization".
We adhere to the business philosophy of "trustworthiness as the foundation, integrity as the priority", requiring every employee to be honest in their conduct and diligent in their work, and to be responsible for producing high-quality and qualified products to increase production and efficiency for customers. We strive to become a century-old enterprise with high quality, strong quality, good reputation, and a beautiful environment.