We cater and supply to almost all parts of world from our Head Office in Jaipur, India. We are in the process of opening more sales offices in Americas, Australia, Gulf Area and China.

Manufacturing: Jaipur

Sales:

Liners

The key to good performance of a Tube mill/Horizontal mill is the liners. They not only cover the inner shell of the mill, thereby preventing it from damage, but also contribute to higher output as they increase the lift of the grinding media thereby improving the grinding efficiency.

The liners and diaphragms have to be designed in such a manner that they contribute in

  • Minimum downtime of the mill thereby achieving maximum wear life.
  • Easy handle ability and fitment
  • Optimum grinding performance
  • Steady flow of material from feed end to discharge end
  • Low cost by achieving better wear rates for grinding media and itself

The liners and diaphragms are designed and grades selected keeping into considerations various factors such as

  • Size of the mill
  • Type and size of grinding media being used
  • Output desired
  • Life guaranteed visa-vi cost
  • Various other mill operating parameters (Please see our mill questionnaire below)

Our Mill Questionnaire helps us understand your needs, position and other factors, which will help us design the liners.

The liners are supplied in various grades of Hi-chrome, Ni-Hard, Chrome-Moly and Mn Steel. Some of the grades are listed below, however, the finer grades are decided based on above factors, while designing the mill. 

Grades of Mn Steel 

Elements Grade –I Grade –II Grade –III Grade –IV Grade –V
Carbon 1.05% – 1.35% 0.90% – 1.05% 1.05% – 1.35% 0.70% – 1.30% 1.05% – 1.45%
Silicon 1.0% Max. 1.0% Max. 1.0% Max. 1.0% Max. 1.0% Max.
Manganese 11.0% – 14.0% 11.5% – 14.0% 11.5% – 14.0% 11.5% – 14.0% 11.5% – 14.0%
Phosphorus 0.08% Max. 0.08% Max. 0.08% Max. 0.08% Max. 0.08% Max.
Sulphur 0.025 % Max. 0.025 % Max. 0.025 % Max. 0.025 % Max. 0.025 % Max.
Chromium 1.5 % – 2.5 %
Molybdenum 1.8 % – 2.1%
Nickel 3.0 % – 5.0 %
Hardness 229 BHN Max 229 BHN Max 229 BHN Max 229 BHN Max 229 BHN Max

Grades of Ni-hard

TYPE 1A TYPE   1B
Elements NiLCr 30/500 NiLCr 34/550 NiHCr 27/500 NiHCr 30/550 NiHCr 34/600
Carbon 2.7 % – 3.3 % 3.2 % – 3.6 % 2.5 % – 2.9 % 2.8 % – 3.3 % 3.2 % – 3.6 %
Silicon 0.3 % – 0.6 % 0.3 % – 0.6 % 1.5 % – 2.2 % 1.5 % – 2.2 % 1.5 % – 2.2 %
Manganese 0.3 % – 0.6 % 0.3 % – 0.6 % 0.3 % – 0.6 % 0.3 % – 0.6 % 0.3 % – 0.6 %
Nickel 3.0 %– 5.5 % 3.0 % – 5.5 % 4.0 % – 6.0 % 4.0 % – 6.0 % 4.0 % – 6.0 %
Chromium 1.5 % – 2.5 % 1.5 % – 2.5 % 8.0 % – 10.0 % 8.0 % – 10.0 % 7.5 % – 9.5 %
Molybdenum 0.5 % Max. 0.5 % Max. 0.5 % Max. 0.5 % Max. 0.5 % Max.
Sulphur 0.15 % Max. 0.15 % Max. 0.15 % Max. 0.15 % Max. 0.15 % Max.
Phosphorus 0.3 % Max. 0.3 % Max. 0.3 % Max. 0.3 % Max. 0.3 % Max.
Hardness 500 BHN Min. 550 BHN Min. 500 BHN Min. 550 BHN Min. 600 BHN Min.

Grades (Major) of High Chrome

CHROME HARD -15:

ELEMENT C Si Mn Cr Ni Mo S P Hardness
MINIMUM % 0.90% 0.30% 0.70% 12.00% 55.0 HRc
MAXIMUM % 1.40% 0.80% 1.20% 15.00% 0.01% 0.50% 0.05% 0.05% 58.0 HRc

Hardness: Hardness is in the range of 48.0 to 52.0 HRc.

CHROME HARD -25:

ELEMENT C Si Mn Cr Ni Mo S P Hardness
MINIMUM % 2.00% 0.30% 0.70% 20.00% 57.0 HRc
MAXIMUM % 3.30% 0.80% 1.20% 28.00% 0.50% 0.50% 0.05% 0.05% 62.0 HRc

Hardness: Hardness is in the range of 57.0 to 62.0 HRc, (595 to 690 BHN)

Grades (Major) of Chrome-Moly

CHROME HARD -2 : Recommended For : FIRST CHAMBER SHELL LINERS, HEAD WALL LINERS & PARTITION DIAPHRAGM GRATE PLATES

ELEMENT C Si Mn Cr Ni Mo S P Hardness
MINIMUM % 0.40% 0.30% 0.50% 1.80% 0.20% 37.7 HRc
MAXIMUM % 0.80% 0.80% 1.10% 2.30% 0.50% 0.50% 0.04% 0.04% 47.7 HRc

Hardness: Hardness is in the range of 37.7 to 47.7 HRc, (350 to 450 BHN)

Mining industries, because of the volume of ore to be ground, and the very large feed size, use 2 stage pulverising. In most cases, there is SAG mill, where primary grinding takes place.

Typically, SAG mill liners are supplied in Cr-Mo specification and in a profile, where maximum lift is available to HCGM for effective crushing.

In the secondary grinding, where ball mills are used, liners in White Iron/ Hi-chromium are supplied. SBIPL supplied liners which are most wear resistant, owing to the abrasive nature of ores and acids used.