LONGSHENG Catalog 2015

MAANSHAN LONGSHENG WEAR RESISTANT MATERIAL CO.,LTD
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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
laura@lsgrindingmedia.com
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.

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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

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Office Building Office
Factory Area

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Production Line

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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.

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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

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Raw
Materials
Purchase
Scientific
Proportioning
Electric
Furnace
Smelting
Mould forming
Polishing
Heat Treatment
FQCSeparationPackingShipments
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

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FORGED BALL PRODUCTION PROCESS
1) Raw material (first grade)
2) Cutting
3) Heated (by electric stove)
4) Forged (by air hammer)

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5) Quenching
6) Tempering
7) Testing
8) Qualified products (ISO,SGS)

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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.

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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.

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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

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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

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Forged Steel Grinding Ball
Brand C Si Mn P S Cr Ni V
LS-01-45# 0.42-0.48 0.17-0.37 0.50-0.80 ≤0.050 ≤0.035 ≤0.15 ≤0.05 ≤0.05
LS-02-50Mn 0.48-0.56 0.17-0.37 0.65-1.00 ≤0.050 ≤0.035 ≤0.15 ≤0.05 ≤0.05
LS-03-60Mn 0.57-0.65 0.17-0.37 0.70-1.10 ≤0.050 ≤0.035 ≤0.25 ≤0.10 ≤0.10
LS-04-65Mn 0.62-0.75 0.17-0.37 0.90-1.20 ≤0.050 ≤0.035 ≤0.25 ≤0.10 ≤0.10
LS-05-B2 0.75-0.85 0.17-0.37 0.70-0.90 ≤0.050 ≤0.035 0.40-0.60 ≤0.15 ≤0.10
LS-06-B3 0.50-0.65 1.35-1.85 0.40-1.0 ≤0.050 ≤0.035 0.80-1.20 ≤0.15 ≤0.10
LS-07-BL 0.55-0.75 0.15-0.35 0.65-0.85 ≤0.050 ≤0.035 0.70-1.20 ≤0.15 ≤0.10
LS-08-BG 0.90-1.05 0.15-0.35 0.35-0.95 ≤0.050 ≤0.035 1.0-1.70 ≤0.15 ≤0.10
Hardness (HRC)
φ25-50(1’’-2’’) φ60-90(2.5’’-3.5’’) φ100-150(4’’-6’’)
Brand Impact
toughness
AK.J/cm2
(sm)
Dropping
test Surface Core Surface Core Surface Core
LS-01-45# ≥15 ≥15000 ≥55 ≥38 ≥54 ≥35 ≥52 ≥30
LS-02-50Mn ≥12 ≥15000 ≥56 ≥40 ≥56 ≥36 ≥55 ≥32
LS-03-60Mn ≥12 ≥15000 ≥58 ≥45 ≥58 ≥38 ≥55 ≥35
LS-04-65Mn ≥12 ≥15000 ≥60 ≥52 ≥60 ≥42 ≥56 ≥36
LS-05-B2 ≥12 ≥15000 ≥60 ≥57 ≥60 ≥54 ≥58 ≥50
LS-06-B3 ≥12 ≥15000 ≥60 ≥58 ≥60 ≥54 ≥60 ≥55
LS-07-BL ≥12 ≥15000 ≥60 ≥58 ≥60 ≥54 ≥60 ≥55
LS-08-BG ≥12 ≥15000 ≥60 ≥58 ≥60 ≥57 ≥60 ≥57

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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

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Hammer Head For Crusher

LONGSHENG Catalog 2015

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