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

Product Introduction

Product Introduction

A cement ball mill is a multi-chamber grinder, also known as a tube grinder. When the aspect ratio is above 4, it is called a long mill or tube mill. Medium and long mills are generally divided into 2-4 compartments internally and are commonly used in cement plants.
A tube mill is an important piece of fine grinding equipment in modern industry and is one of the most common and important devices in grinding systems. Large tube mills have high production capacity. The tube mill has the characteristics of high crushing ratio, high production capacity, strong adaptability to materials, and easy replacement of worn parts. The main components of a tube mill include: cylinder, feeding section, unloading section, transmission section, etc.
The grinding media (balls or cylpebs) are a kind of carrier used in a ball mill to help crush & grinding minerals. For a cement ball mill, the first chamber will used large size balls or cylpebs, and the second chamber will use small-size cylpebs. The cylpebs is cylinder shape, this shapes grinding efficiency is better than small size balls. And the super high chromium (Cr: 16-28%) cast grinding balls and cylpebs have high hardness (HRC 58-67) and less grinding media consumption; it is the best choice for cement and other high hardness minerals such as Lead-Zinc ore and Quartz sand.

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Core Features
Application Scenarios
Product Characteristics
Customization Options

Product Advantage

Lower consumption cost
Because high-chromium grinding media have higher hardness than forged steel cylpebs and can be made with different chromium contents (10-28%), their consumption will be only 25%-65% of forged steel & lower-chrome casting cylpebs used in Ball mills. For some special minerals that have the highest hardness, such as Quartz sand, choose Top chromium (Cr: 23-28%) cast grinding media; the media consumption cost will be much less than other kinds of grinding media.

Higher hardness
High Chrome cast grinding media casting cylinders processed with special heat treatment (Oil quench & annealing) will have the highest hardness ( HRC 64- 67). Small-size Φ6*6 - Φ30*35 mm casting cylinder hardness can be HRC 66, and Φ30*35 - Φ55*60 mm cast cylinders hardness can be made to HRC64; it’s the highest hardness among other kinds of material grinding media. And this cast high chrome cylinders surface & core hardness difference is less than HRC 2.

Customized alloy Steel composition
NGZR foundry can match customer’s required to readjust the Chemical Composition of Chromium content (1.0-30%) and other usdful alloying element such as C /Mn/ Si/ Cu/ Ni/ Mo etc, with special heat-treatment processing, which can make this casting grinding cylinders get different thechnical paramenters, such as hardness / Impact Value / Breakage and de-shaping rate / micro- structure / high PH degree of acid or alkali resistant/high temperature resistance etc, to match customer’s special requirements.

Customized grinding media shape
NGZR can develop and make different shapes of grinding media, such as: Grinding ball (Sphere) / Grinding cylpebs ( Cylinder) / Grinding egg ( Ellipsoid) / Polyhedron Shape and other special customized shapes. Different shape grinding media will have better grinding effect with different grinding conditions.

Lower breakage & out-of-roundness rate
Depending on controlling raw material quality / advanced casting production equipment & special heat-treatment processing, the high chrome grinding cylinders product of NGZR has good Physical Property, large size cast grinding media breakage & Out-of-roundness rate will be less than 1%; small-size casting ball breakage & Out-of-roundness rate will be less than 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.

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.