50-90 mm B2 B3 Forged Steel Grinding Balls Grinding Media Balls for Gold Mine Ball Mills
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Product Highlights
- Medium-Diameter Grinding Media: 50-90 mm grinding balls provide a practical size range for gold ore ball mills handling primary and secondary grinding duties.
- B2 & B3 Grade Options: B2 and B3 grades provide different combinations of hardness, toughness and wear resistance for different gold ore grinding conditions.
- Balanced Hardness and Toughness: Controlled heat treatment helps achieve the balance required for repeated impact and abrasive wear in ball mill operation.
- Consistent Size and Quality: Controlled forging, heat treatment and dimensional inspection help maintain consistent grinding media performance from batch to batch.
Product Attributes
- Customization
- Available
- Material
- B2;B3;
- Content
- >90%
- Model NO.
- 50-90 mm
- Usage
- Construction, Grind, Refractory Material, Gold Mine Ball Mills
- Processing Type
- Forged and Hot-Rolled
- Size
- 50 mm to 90mm
- Color
- Black
- Customized
- Customized
- Product Name
- Forged Steel Ball
- Packaging Details
- Iron Drum/Ton Bag
- Standard
- ISO 9001;ISO 14001;ISO 45001;
- Hardness (HRC)
- 54-65
- Impact Toughness
- ≥12 J/Cm²
- Breakage Rate
- <1% Under Specified Test Conditions
- Application
- Gold Mine Ball Mills
- Application 1
- Ball Mills
- Application 2
- Sag Mills
- Transport Package
- Drum/Ton Bag
- Specification
- 50-90 mm
- Trademark
- JUNDA
- Origin
- China
- HS Code
- 7326110000
- Production Capacity
- 5000tons/Month
- Package Size
- 75.00cm * 75.00cm * 70.00cm
- Package Gross Weight
- 1002.000kg
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of 50-90 mm B2 B3 Forged Steel Grinding Balls Grinding Media Balls for Gold Mine Ball Mills
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50-90 mm B2 B3 Forged Steel Grinding Balls Grinding Media Balls for Gold Mine Ball Mills -
50-90 mm B2 B3 Forged Steel Grinding Balls Grinding Media Balls for Gold Mine Ball Mills -
50-90 mm B2 B3 Forged Steel Grinding Balls Grinding Media Balls for Gold Mine Ball Mills -
50-90 mm B2 B3 Forged Steel Grinding Balls Grinding Media Balls for Gold Mine Ball Mills -
50-90 mm B2 B3 Forged Steel Grinding Balls Grinding Media Balls for Gold Mine Ball Mills -
50-90 mm B2 B3 Forged Steel Grinding Balls Grinding Media Balls for Gold Mine Ball Mills -
50-90 mm B2 B3 Forged Steel Grinding Balls Grinding Media Balls for Gold Mine Ball Mills
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Product Description
50-90mm B2 B3 Forged Steel Grinding Balls for Gold Mine Ball Mills
update:June 5th, 2026JUNDA 50-90 mm B2 and B3 forged steel grinding balls are designed for gold mine ball mills used in primary and secondary grinding. Manufactured through controlled forging and heat treatment, they provide a balanced combination of hardness, toughness, and wear resistance for continuous gold ore grinding.
Available in 50, 60, 70, 80 and 90 mm diameters, B2 and B3 grades can be selected according to ore hardness, feed size, mill conditions and required grinding performance.
| Chemical element parameters table of B2/B3 forged steel balls | |||||||
| Material | C% | Cr% | Si% | Mn% | P% | S% | Hardness (HRC)
|
| B2 | 0.72-0.86% | 0.40-0.60% | 0.15-0.35% | 0.30-1.20% | ≤0.035% | ≤0.035% | 54-65 |
| B3 | 0.50-0.65% | 0.40-0.60% | 0.15-0.35% | 0.50-1.00% | ≤0.035% | ≤0.035% | 58-65 |
Breakage Rate : <1% under specifiedtest conditions
50-90mm Grinding Ball Selection for Gold Mine Ball Mills
| Ball Diameter | Typical Application |
|
|---|---|---|
| 50 mm | Secondary Grinding | Smaller feed and finer grinding |
| 60 mm | Secondary Grinding | Balanced grinding action |
| 70 mm | Primary / Secondary Grinding | Moderate feed size and impact |
| 80 mm | Primary Grinding | Coarser feed and higher impact |
| 90 mm | Primary Grinding | Coarse feed and higher impact conditions |
| These are general selection guidelines. The optimum grinding ball size should be determined according to feed size, ore hardness, mill diameter, mill speed, ball charge and target product size. | ||
Why Choose 50-90 mm Grinding Balls for Gold Ore Grinding?
Gold ore grinding circuits may require different grinding media sizes depending on feed size, ore hardness, mill diameter and target product size. Medium-diameter grinding balls provide a balance between impact energy and the number of grinding contacts within the mill.
Suitable Impact Energy
50-90mm balls provide more impact energy than small-diameter media and can be considered when the mill receives relatively coarse feed.
Effective Size Reduction
The medium diameter range provides a balance between impact and abrasion during continuous gold ore grinding.
Flexible Ball Size Selection
50, 60, 70, 80 and 90 mm sizes allow the grinding media charge to be adjusted according to operating conditions.
B2/B3 Material Selection
Different alloy grades can be selected according to ore abrasiveness, impact conditions and desired wear performance.
How to Select Grinding Balls for Gold Ore?
| Selection Factor | Why It Matters |
|---|---|
| Feed Size | Coarser feed generally requires greater impact energy |
| Ore Hardness | Influences grinding resistance and wear |
| Ore Abrasiveness | Affects grinding media consumption |
| Mill Diameter | Influences ball impact energy |
| Mill Speed | Changes ball movement and impact conditions |
| Target Product Size | Influences the required media size |
| Ball Charge | Affects grinding efficiency |
| Existing Media Size | Important for maintaining the desired ball size distribution |
Applications in Gold Mine Ball Mills
Gold Ore Primary Grinding
50-90 mm grinding balls can be used for primary grinding in ball mill circuits where relatively coarse gold ore feed requires sufficient impact energy for size reduction.
Gold Ore Secondary Grinding
Smaller sizes within the 50-90mm range can be considered for secondary grinding when the feed has already been reduced by the primary grinding stage.
Gold Mineral Liberation
Effective grinding helps reduce ore particle size and supports the liberation of gold-bearing minerals before downstream concentration or recovery processes.
→ Get Your Gold Grinding Media Recommendation
JUNDA B2/B3 Forged Steel Grinding Ball Manufacturing Process
01 Raw Material Inspection
Chemical composition and material quality are checked before production.
02 Controlled Heating
Steel is heated under controlled temperature conditions.
03 Hot Forging
The heated steel is forged into grinding balls to develop a dense and uniform internal structure.
04 Quenching
Controlled quenching develops the required hardness.
05 Tempering
Tempering helps balance hardness and toughness.
06 Hardness Testing
Surface and core hardness are inspected according to the required specification.
07 Dimensional Inspection
Ball diameter and dimensional tolerance are checked before shipment.
→ Get Your Gold Grinding Media Recommendation
About the Supplier
This supplier has been audited by BV. Verify the report on the official BV website with ID "MIC-ASR255938". Items marked "
" are certified.
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Company Profile
JINAN JUNDA INDUSTRIAL TECHNOLOGY was established in 2005. We are a professional manufacturer and exporter of Forged Steel Balls, Cast Steel Balls, Steel Rods, Chrome Steel Balls, Carbon Steel Balls, Stainless Steel Balls, Garnet Sand, Steel Shot, Steel Grit, Bearing Steel Grit, Glass Beads, and other surface treatment abrasives.
Regarding garnet sand, we integrate mining, production, and sales, with adequate reserves. In recent years, our garnet sand production capacity has increased from thousands of tons to tens of thousands of tons. We have built a good reputation in the garnet industry worldwide.
Regarding steel shot, steel grit, and bearing steel grit, our products meet American SAE standards and are widely used in shipbuilding, molding, steel production, automobile manufacturing, container manufacturing, machinery manufacturing, pipeline anti-corrosion, aviation, granite cutting, and other industries.
Regarding glass beads, we can produce different types of road-marking glass beads, sandblasting glass beads, and grinding glass beads according to customers' specific requirements and relevant standards, including European Standards EN 1423 and EN 1424; American Standard AASHTO M247 Types 1 and 2; British Standard BS 6088 Classes A and B; Japanese Standard JIS R3301; And Korean Standard KSL 2521 Nos. 1 and 2.
Our philosophy is to build sustainable growth on a foundation of high quality and excellent customer service. We manufacture our products in accordance with ISO quality standards and provide in-depth application knowledge and professional technical support. Highly efficient logistics are central to our company culture, and JINAN JUNDA INDUSTRIAL strictly controls materials from source to production to ensure quality and consistency. Our products are exported to the USA, Germany, Japan, and more than 90 countries worldwide.
We welcome your inquiries about our current products and opportunities for new applications and cooperation.
About Our Factory & Business Background
- Address
- OUYA DAGUAN Shizhong District, Jinan, Shandong, China
- Terms of Payment
- T/T, LC, Western Union, D/P
- International Commercial Terms(Incoterms)
- FOB, EXW, CIF, FAS, DDP
- Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays - Nearest Port
- Qing Dao
Our Production Capability & Technical Expertise
Our Industry Experience & Global Business Record
- Main Markets
- North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
FAQ
- What are 50-90 mm grinding balls used for?
- 50-90 mm grinding balls are commonly considered for primary and secondary grinding in ball mill-circuits where medium-sized grinding media are required.
- Are 50-90 mm grinding balls suitable for gold ore?
- Yes. B2 and B3 forged steel grinding balls can be used for gold ore grinding in ball mills. The appropriate size and grade depend on ore hardness, abrasiveness, feed size and mill conditions.
- What size grinding balls are used in gold mine ball mills?
- The required size varies according to feed size and grinding stage. Within the 50-90 mm range, 70-90 mm balls may be considered for coarser primary grinding, while 50-70 mm balls can be considered for secondary grinding as feed size decreases.
- What is the difference between B2 and B3 grinding balls?
- B2 and B3 are different alloy grades designed to provide different balances of hardness, toughness and wear resistance. B2 can be considered for abrasive grinding conditions, while B3 may be selected when higher impact toughness is required.
- How do I choose between 50mm and 90mm grinding balls?
- Ball size should be selected according to feed size, ore hardness, mill diameter, mill speed, target product size and existing ball size distribution. Larger balls generally provide greater individual impact energy, while smaller balls provide more individual grinding contacts.
- Are B3 grinding balls better than B2 for gold ore?
- Not necessarily. The better grade depends on the specific operating conditions. B2 and B3 should be evaluated based on ore abrasiveness, impact conditions, wear rate and actual grinding media consumption.
- What hardness should gold mine grinding balls have?
- The appropriate hardness depends on ball size, material grade, ore abrasiveness and impact conditions. JUNDA can supply B2 and B3 grinding balls with hardness specifications matched to customer requirements.
- Can 50-90 mm balls be used for both primary and secondary grinding?
- Yes. Larger sizes such as 70-90 mm can be considered for primary grinding with relatively coarse feed, while 50-70 mm balls may be suitable for secondary grinding as the feed size decreases. The final selection should be based on mill conditions and target product size.
- What factors affect grinding ball consumption in gold mills?
- Grinding media consumption is influenced by ore abrasiveness, ore hardness, ball size, ball grade, mill speed, ball charge, liner design, mill operating conditions and the target product size.
- Can JUNDA recommend B2 or B3 for my gold mill?
- Yes. Please provide your mill diameter, feed size, ore type, ore hardness, current grinding media grade and size, mill speed and media consumption. JUNDA can use this information to recommend a suitable B2 or B3 grinding media solution.
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Product Groups
- Forged Steel Ball
- Abrasive Blasting Media
- Sandblasting equipment
- Stainless steel ball
- carbon steel ball
- Chrome Steel Ball
- Cast steel ball
- Steel Rod
- Silicon series
- Sandblasting parts(sandblasting nozzle &sandblasting gun)
- Sandblasting Protection Equipment(sandblasting helmet&hood)
- Road marking machine
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