maanshan longsheng wear resistant material co.,ltd...

MAANSHAN LONGSHENG WEAR RESISTANT MATERIAL CO.,LTD

of 12 Maanshan Longsheng Wear Resistant Material Co.,Ltd Tel: +86 555 6871 215 Gu Shu Industrial Zone , Dang Tu County, Ma Anshan, Anhui, China Fax: +86 555 6871 606

www.lsgrindingmedia.com [email protected]

Maanshan LongSheng Wear Resistant Material CO.,LTD Long Sheng is a professional manufactures for FORGED and CAST Steel grinding ball 、cylpebs and ball mill wear liners and hammer head in China, mainly applied to various mines, cement plants, power stations and chemical industries etc. We has built a strong reputation over many years for outstanding service, industry knowledge and trusted supply of grinding media products For more than 11 years, we have 3 Auto casting/forging line, 8 Auto heat treatment line , have been specializing in the development, manufacture, marketing and after-sales service of grinding media, Our products are famous for their specialties, including high hardness, wear-resistant, and low breakage As one of the largest manufacturers and exporters for grinding media, our company boasts an annual exporting capacity of 100,000 tons per year, we have 89 employees. clients from all over the world, such as Indonesia, South Africa, Middle East, Eastern Europe, America, Australia, and Southeast Asia. We promise seriously our clients that we supply our customers with high quality products, competitive prices, timely delivery and satisfactory service. Longsheng is looking forward to cooperating with clients around the world.




What is Grinding Media?

Material used to finely grind ore material to a size which allows recovery of the desired contained material

Grinding media Grinding balls are only one type of grinding media. Grinding media are the means used to crush or grind material (cement, mineral, …) in a mill. Grinding media sorting is performed when the ball load wears out. New grinding balls are then added or full reload is carried out to keep optimum filling degree and hence mill performance.

According to the material to be crushed or ground, grinding media can have

• Different forms: grinding balls, cylpebs (cylinders with rounded tops), • Different sizes: balls (diameters from 6mm to 150mm) • Different composition (alloy): high or low chromium content for steel and iron balls for example. • Different manufacturing process: balls for instance, can be cast or forged for instance. Longsheng is an supplier offering the full range of grinding balls in particular and grinding media in general: cast and forged, low and high chromium, balls/cylpebs. It is usually a specialized process engineer who will recommend best suited media, shape, size and alloy. We will also calculate the mill’s optimum filling degree according to several parameters such as mill type and size, material to be ground, specific operating parameters and of course the targets of each installation (more tons a day, increased fineness of the finished product, cost,…). • Attributes Of Our Grinding Media Balls : • High hardness • Good wear-resistance • No breaking • No mal-roundness •

Industries We Serve : • Mining • Cement • Power stations • Chemical




Office Building Office

Factory Area




Production Line




Package- woven bags Package- steel drum

Longsheng offers a unique variety of grinding media that combines the following

characteristics:

• Size: from 6mm to 150mm

• Chromium percentage: from 0.5 to 35%.

• Heat treatment cycles.

The choice of media depends upon:

• Material to be ground and granulometry.

• Grinding process.

• Importance of wear mechanisms involved (abrasion, corrosion, impact).

• Factors influencing these mechanisms.




CASTING Ball PROCESS

1) Purchase

2) Raw material

3) Raw Materials inspection

4) Scientific Proportioning

5) Electric Furnace Smelting

6) Fast Spectral Component Analysis, Temperature Control

7). Mould forming

8) Polishing

9) Semi-finished product composition and size detection

10) Heat Treatment

11) Hardness microstructure test

12) FQC

13) Destructive testing

14) Separation

15) Packing

16)Certificate Of Guarantee Of Quality

17)Shipments




Raw

MaterialsPurchase

Scientific

Proportioning

Electric

Furnace

Smelting

Mould forming

Polishing

Heat Treatment

FQC Separation Packing Shipments

Raw Materials inspection

Fast Spectral Component Analysis,

Temperature Control

Certificate Of Guarantee Of Quality Destructive testing

Hardness microstructure test

Semi-finished product composition

and size detection




FORGED BALL PRODUCTION PROCESS 1) Raw material (first grade)

2) Cutting

3) Heated (by electric stove)

4) Forged (by air hammer)




5) Quenching

6) Tempering

7) Testing

8) Qualified products (ISO,SGS)




9) Package

HEAT TREATMENT PROCESS

In order to ensure the balance of hardness uniformity wear resistance and toughness, We

adopt unique heat treatment process. First, preheat treatment and high temperature

quenching and high temperature tempering treatment in order to ensure the casting ball’s

surface hardness and core hardness difference is minimal, casting ball microstructure is

martensite + chromium carbides, retained austenite content is controlled at 5% or less.

QUALITY CONTROL

1).Control of raw materials: the main material, steel scrap, first appearance requirements

should no rust, no oil, no impurities, composition testing, alloy by visual inspection, the

supplier must provide quality certificate, and finally sent to the third party inspection.




2). Smelting control: According to the requirements of each cast ball, a reasonable ratio of

raw materials, control components, before the furnace using spectral component analysis.

Using infrared thermometer control melt temperature

3). Casting control: According to the ball’s different specifications, Adjust the mold

temperature properly and the shape of the sand mold strength, strictly control the casting

temperature and cooling time.

4). Heat treatment control: According to the ball’s specifications to set the heat treatment

curve, Intelligent instrument control in the temperature and time in every production line,

continual attention to the temperature of the quenching liquid changes. Hardness testing

control sampling every 30 minutes to ensure the hardness stability of each batch.

Microstructure of each batch inspection To ensure the consistency between each batch.




5). Quality control: semi-finished products through inspection, each batch destructive testing,

finished product inspection, to ensure before shipment nonconforming product is zero

Hardness test Chemical component test




Cast Iron Grinding Ball

Material Composition of Cast Iron Grinding Ball (Dia 6mm- 140mm) Item Cr % C % Mn % S % P % Si % Hardness Low Chrome 1.5-3.0 2.5-3.2 0.5-1.5 0.05 Max 0.05 Max 0.2-0.8 48-53 HRC Medium Chrome 4.0-9.0 2.4-3.0 0.5-0.8 0.05 Max 0.05 Max 0.2-0.8 50-55 HRC High Chrome 10.0-28.0 2.0-2.8 0.5-0.8 0.05 Max 0.05 Max 0.2-1.0 58-63 HRC




Forged Steel Grinding Ball

Material Composition of Forged Steel Grinding Ball (Dia 20mm-150mm) Item Cr % C % Mn % S % P % Mo % S % Hardness Forged 1.5 Max 0.4-1 0.4-2 0.15-0.6 0.05 Max 0.05 Max 0.05 Max 58-63 HRC

Grinding cylpebs

Material Composition of Cast Iron Grinding Ball (Dia 10x12mm-45x50mm)

Item Cr % C % Mn % S % P % Si % Hardness Low Chrome 1.5-3.0 2.5-3.2 0.5-1.5 0.05 Max 0.05 Max 0.2-0.8 48-53 HRC Medium Chrome 4.0-9.0 2.4-3.0 0.5-0.8 0.05 Max 0.05 Max 0.2-0.8 50-55 HRC High Chrome 10.0-28.0 2.0-2.8 0.5-0.8 0.05 Max 0.05 Max 0.2-1.0 58-63 HRC




Ball Mill Wear Liner Plates

Hammer Head For Crusher

maanshan longsheng wear resistant material co.,ltd...

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