Ultra High Hardness-HRC 66 Casting Grinding Steel Ball for Mining

• Customization: Available
• Standard: GB
• Application: Cement Plant, Mining Machine, Thermal Power Plant
• Model NO.: GM-HCGB-6
• Type: Grinding Ball
• Chromium Content: 10% - 12%
• Hardness: HRC 65-67
• Heat Treatment: Oil Quenching + Annealing
• Breakage Rate: Max 1%
• MOQ: 1 Mt Per Size / 20 Mt Each Shipment
• Order Lead-Time: 25-45 Days
• Media Consumption: 25-60 G Per 1 Mt Ore
• Impact Fatigue Life: Min 15000 Falling Ball Times
• Impact Value: Min 3.0 J /Cm2
• Diameter Size: 5 - 70 mm
• Transport Package: Ton Bag / Metal Durm
• Specification: casting
• Trademark: OEM
• Origin: Ningguo, Anhui, China
• HS Code: 73259100
• Production Capacity: 2000 Mt / Month

Product Description

Product Description

       High chrome grinding ball is the alloy steel grinding media by casting, was used to Ball mill / SAG mill / Tower mill for Mining & Cement and other industries. This alloy material have 10% - 28% Chromium,  finished product hardness can reach to min HRC 58 & max HRC 65, so this high chrome grinding ball consumption will much less than forged /hot-rolled steel ball and low chrome cast steel ball, ball consumption unit cost is the best of all kind material grinding media.

Detailed Photos

 

Product Parameters

#1  Alloy Chemical Composition:
Cast grinding ball     Name	Item	Chemical  Composition ( % )
		C	Si	Mn	Cr	Mo	Cu	Ni	P	S
Top Chrome	ZQCr26	2.1-3.3	≤1.2	0.2-1.5	23 - 30	≤1.0	≤1.0	≤1.0	≤0.06	≤0.06
Super Chrome	ZQCr20	2.1-3.5	≤1.2	0.2-1.5	18 - 23	≤1.0	≤1.0	≤1.0	≤0.06	≤0.06
High Chrome	ZQCr12	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 2	2.1-3.6	≤1.5	0.2-1.5	1.0-3.0	≤1.0	≤0.8	-	≤0.10	≤0.10
CADI	ZQCADI	3.2-3.8	2.0-3.0	0.5-3.5	0.2-1.5	≤1.0	≤1.0	-	≤0.05	≤0.03

 

#2  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
Top Chrome	ZQCr26	HRC ≥ 62	≤ 1.0 %	≥ 15000	≥ 3.0	M +C
Super Chrome	ZQCr20	HRC ≥ 60	≤ 1.0 %	≥ 15000	≥ 3.0	M +C
High Chrome	ZQCr12	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 2	HRC ≥ 45	≤ 2.0 %	≥ 8000	≥1.6	P +C
CADI	ZQCADI	HRC ≥ 50	≤ 1.0 %	≥ 15000	8-25	M+AF+ GJS
Remark:   M= Martensite ;  C= Carbide ;  P= Pearlite ;  AF= Acicular Ferrite ;  GJS= spheroidal graphite

 

#3  Existing Product Size :
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 customized any cast ball diameter size from Φ6 to Φ150 mm;

 

#4  Product Weigth :
Size  (mm)	Φ20	Φ25	Φ30	Φ40	Φ50	Φ60	Φ70	Φ80
Weight (kg/pcs)	0.034	0.063	0.11	0.26	0.51	0.86	1.37	2.05
Q'ty (pcs) per mt	31506	15873	9091	3891	2000	1153	729	487
Size  (mm)	Φ90	Φ100	Φ110	Φ120	Φ125	Φ130	Φ160
Weight (kg/pcs)	2.9	4.0	5.3	6.8	7.75	8.74	13.5
Q'ty (pcs) per mt	345	250	188	147	129	114	74

 

Packaging & Shipping

Package:     
                    1.    Ton Bag  ,  1000 kg per Bag;                                                    2.    Metal Drum,    800-1000 kg per Drum

 

Company Profile

NGZR (Full name: Anhui Ningguo Zhongrui Wear-resisting material Co., Ltd) was a professional manufacturer of casting grinding media and wear-resistant alloy casting part. NGZR's founder start casting grinding media business since 1987, and NGZR was established in 2007, It have more than 30 years experience for wear-resisting casting part and casting grinding ball.

NGZR's foundry was located at Ningguo City (national) industrial park, it is 350km away from Shanghai Sea port, and 150km away only from Nanjing Lukou international Airport.  Foundry covers an area of 1.8 Hectare, has workshop area more than 10,000 SQM. Foundry annual production capacity was 30,000 - 50,000 MT.

NGZR's main products as below:
#1  Casting grinding media (grinding ball & grinding cylpebs) for Ball Mill:
#2   Wear-resistant casting part for Mining Machinery :
      Casting liner& Hammer & Jaw plates & Casting bucket tooth 
#3   Other metal casting with hot Zinc surface- plating :
     A#  Casting steel cap of High voltage electromagnetic insulator;
     B#  Casting Corner Fittings of Standard Cargo Containers;
     C#  Casting Bracket for Solar photovoltaic ;

NGZR foundry have 4 different casting workshops with different casting production line, details as below :
#1  Full Automatic Metalic mould coating sand casting production line 
#2  Resin-sand Shell mould vertical casting production line 
#3  Resin-sand Wooden mould manual casting production line
  #4  Lost foam process full Automatic precision casting line

     NGZR not only has a large production capacity and advanced production equipment, but also is equipped with advanced design & testing equipment, such as Auto-CAD drawing software, CNC model cutting machine, direct reading spectrometer, hardness tester, far infrared thermometer, etc., which can help accurately control models size and alloy composition, realize temperature controlled melting, constant temperature pouring, automatic temperature controlled quenching/annealing and other production processes, ensuring the stable and reliable quality of grinding balls & casting parts.

 NGZR have more than 30 years of experience in the design/ produce and after-sales service of grinding media and wear-resistant casting parts. we have rich experience in cooperating with enterprises in different industries such as iron ore/non-ferrous metal mines/cement industry/sand & aggregate industry/Concrete materials and coal-fired power plants, and provide solutions for end customers. NGZR can do OEM & ODM with customer, our products are not only hot sale in China domestic market, also been exported to oversea countries such as the Philippines/ Malaysia/ Indonesia/ Ghana/ Zimbabwe, etc.

NGZR is committed to providing one-shop solutions for the grinding media and wear-resistant casting parts used in customers' existing equipment, reducing unit production costs & improving production efficiency for customers,, ensuring and extending the maintenance cycle and service life of customers' equipment, creating value for customers, to take NGZR own development.

Our Advantages

#1  Customized alloy composition;
   NGZR foundry can be followed customer's requirement to readjust the Chemical Composition of Alloy material such as: Chromium (10-28%) / Carbon / Silicon / Manganese / Copper / Nickel / Molybdenum, that can help grinding media match different mineral characteristics as high hardness / High PH degree of acid or alkali and high temperature grinding etc.  
#2  Customized grinding media shape; 
   NGZR can develop and make different shape of grinding media as: Grinding ball (Sphere) / Grinding cylpebs ( Cylinder) / Grinding egg ( Ellipsoid) / Polyhedron Shape and other special customized shape. Different shape grinding media will have better grinding effect with different grinding conditions
#3  Higher hardness;
   Casting high Chromium grinding ball with special heat treatment processing (Oil quench & annealing), will have higher hardness. The minimum hardness is HRC 58 for large casting ball diameter size with lower breakage rate, and maximum hardness can be reach to HRC 65, can be used to highest hardness ore.
#4  Lower wear-rate;
  Because the high chromium grind ball have higher hardness, and hardness difference of ball surface and core less than HRC 2, and alloy material be able to withstand high temperature / high acid & alkali, its wear rate will much less than forged ball /lower chrome steel ball. Ball mill ( SAG mill ) grinding for For Iron ore/ Copper ore /Gold ore, high chrome grinding ball consumption will be 30- 80 g for each ton ore.
#5  lower breakage & out-of-roundness rate;
  Depend on controlling raw material quality / advanced casting production equipment & special heat-treatment processing, The high chromium casting grinding ball product of NGZR have good Physical Property, large size casting ball breakage & Out-of-roundness rate will less than 1%; Small size casting ball breakage & Out-of-roundness rate will less than 0.5%
 

FAQ

#1  How to require a quotation ?
   Please send details of your requirement to us ,we will send quotation sheet to you within 3 working days by E-mail.

#2  How to require a free sample ?
   Please send your sample requirement to us,we will check and confirmed to you within 3 days. Sample quantity less than 3 pcs can be free, but sample express & tax fee should be by Freight Collect.

#3  What is this product MOQ ?
   The MOQ of this high chrome grinding ball  is 1 tons per size, 20 tons per each shipment;

#4  What is your order Lead-time ?
   Order Quantity less than 200 mt, the lead-time is 20-30 days after order deposit;
  Order Quantity is 200-1000 mt, the first 500 mt need 30-45 days, balance will be 45-60 days;
  Order Quantity is 1000-10000 mt, first 500 mt need 30 days, balance will be 2000 mt each month;

#5  What is your export product package ? How to transport ?
   Our product export package is ton bag (1000 kg)or metal drum+ wooden pallet (800-1000 kg per drum). For oversea customer, we will transport by sea with container ( 20 feet container loading 20-25 mt) , or by train with container.

#6  What is your payment term ?
   With different price & quantity of contract, We accept different payment term as below:
  a. 10% T/T in advance, balance T/T before shipment;
  b. 10% T/T in advance, balance T/T within 30-60 days after B/L date ( O/A 30-60 days);
  c. 10% T/T in advance, balance T/T within 60-120 days after B/L date ( O/A 60-120 days);

#7  What is your price term ?  How to delivery cargoes?
    We can do price term as below:
   #1  EXW factory, including VAT tax,     Loading cargoes in our factory ( Ningguo city, Anhui );
   #2  FOB Shanghai / Ningbo Port,        Container loading cargoes in our factory;
   #3  CIF Port of delivery,                       Shipping with container by sea;
   #4  DAP place of delivery;                   Transport with container by sea & by train;