in the nitride hardening process.Nitride hardening provides steel
components with very high surface hardness whilst utilising a low
process temperature with slow cooling at cycle end.This results in
vastly increased wear resistance combined with zero distortion on
comple, finished components.
- Automotive – Competitive (F1) etc
- Gear & Power – Transmissions
- Construction – Drilling & Piling equipment
- Machine Tools – Component Parts
- Metal Forming – Dies & Moulds
Nitride hardening, Steel components, Wear resistance, Automotive, Gear & Power, Construction, Machine Tools, Metal Forming
As recognised World leading suppliers of metallic grinding media, we are pleased to advise the most suitable grade for any particular application.
Calculation of the most appropriate ball size and grading to achieve
maximum grinding efficiency is offered free of charge.
We supply four types of grinding media.
1. High Chrome Grinding Media
High chromium cast irons are used extensively for the production of
grinding balls from 15mm to 110mm diameter. Criteria for successful application is a combination of toughness to resist breakage and wear resistance for extended life. Inevitably this requires a compromise due
to the conflicting properties required to produce these criteria. Chemical specifications range from 2.0% to 3.0% Carbon, and 12% to 30% Chromium depending on media size and application, with secondary additions of molybdenum in some cases and almost all alloys are heat treated.
2. Forged Steel Grinding Media
Traditionally used in wet applications and in environments with extreme wear. Used extensively in the mining industry particularly for grinding ores.
We supply 3 main grades of high carbon forged steel in the size range 25mm – 150mm diameter.
- Longwear 300 (260 – 400BHN)
- Longwear 500 (450 – 550BHN)
- Longwear 700 (650 – 740BHN)
3. Chillard Extra Cylpebs
Longwear Chillard Extra is a modified variation of white cast iron where additional chromium is added to give an improved hardness level of 57-60 HRc. Due to greater specific surface area and improved bulk charge density it can be shown that in many applications cylpebs achieve a much greater grinding efficiency than an equivalent sized ball.
The unique production process allows for a consistent hardness level from surface to core leading to an even wear pattern in service.
4. Refurbished Grinding Media
For many years Longwear Limited have supplied refurbished grinding media to the cement and mineral processing industry both in the UK and overseas. Our refurbished quality is stringently tested before being graded and packed into new drums ready for supply back into the comminution industry.
Refurbished grinding media offers an extremely cost effective alternative to new media as well as the environmental benefits associated with the manufacture of new media.
Full guarantees are provided and samples can be submitted for approval prior to despatch.
Nickel-Chrome Alloy Heat Resistant Parts for Rotary Kilns and Coolers with operating temperatures up to 1200 degrees Centigrade.
- Cooler Grate Plates
- Satellite Cooler Liners
- Satellite Cooler Lifters
- Rotary Cooler Lifters
- Kiln Nose Rings
- Furnace & Kiln Furniture
- Entry Chutes
wear resistant parts and alloy castings in various alloys
and grinding media for the Mining, Quarrying and General
Engineering industry sectors.
We have the expertise to recommend the most suitable of
materials to give optimum performance in environments
requiring abrasive and/or impact resistance.
If you have specific criteria for your requirements, Longwear
Ltd can provide accurate alloy castings for many purposes.
Longwear Ltd can individually design bolted or boltless ball mill lining systems to suit every type of grinding application.
We have technical expertise to advise on the choice of liner profiles and alloy selection to achieve a cost effective and durable solution for optimum grinding performance.
The comprehensive range of alloys offered have been specially developed to achieve the maximum amount of wear resistance and the minimum of maintenance. Liners are guaranteed fit for purpose with a performance warantee relative to the operating conditions.
Feed Head Wall Liners
1st Chamber Shell Liners
Intermediate Diaphragm Assemblies
2nd Chamber Classifying Liners
Discharge Diaphragm Assemblies