Dual Sprocket Conveyor Chain

Transcription

1 SACEA Strategic Theme 2015 The relationship between man and machine and compliance to changing legislation South African Colliery Engineers Association Technical Symposium Secunda Club - Thursday 25 June 2015 Dual Sprocket Conveyor Chain by CINCINNATI Mine Machinery

2 New Dual Sprocket Flight Chain

3 THE CINCINNATI MINE MACHINERY Co. DA-3502-A Conveyor Chain-Advantages 27% quieter Dual 11 tooth sprockets Even pitched chain Increased articulation Better transition from sprocket to loading deck Better cost/tonne Minimal/zero chain breaks

4 Designed for Longer Life Larger pins -15% greater strength -larger dia-longer life Long flight pin & bore engagement improves rigidity Wear bars on the side strap and flight arm Universal links thicker on top than the bottom for wear

5 DA350-Dual Sprocket Flight Chain-Features Extended life & reliability-sprockets, Chain & Deck 12 Teeth engaged (6 Teeth on each 11 tooth Sprocket) vs 4 Teeth engaged on a single 7 tooth Sprocket 70% plus Less Tooth to Chain Strike Energy Chain Deck Cover Increased from 22% to 34% Ease of Introduction to your fleet Exchange & upgrade system for shafts, sprockets assembly Training included & safety equipment available

6 Tail Drive Dual Sprocket

7 DA350 Dual Sprocket Conveyor Chains Global Population Growing-Sales over 400 since 2012 OEM on Sandvik & recently on Eickhoff Location SANDVIK Caterpillar Joy USA SASOL Greenside S/Witbank Delmas, Buffalo, Weltevreden 4-MC470 1-ABM30 2-MC470 1-MC470 5-MC430 Matla New Denmark 1-HM31 6-HM9 3-HM31

8 Dual Sprocket Conveyor Chain-US Field Results 65% plus longer life more than offsets higher cost In USA Average Chain life over 16,5 months-65% plus better 1 Chain has achieved over 21 months in the USA Extended sprocket life proved Nil or dramatically fewer breakages improves CM Productivity Operators generally remove Chains once they have achieved extra Life before failure Oversize sprocket gives a further 15-20% expected life extension

9 Dual Sprocket Conveyor Chain-SA Field Results SANDVIK Analysis-39 MC470 Machine Months ZERO Conveyor Chain Breaks Average Cutting tpm at 360 t per available hour SASOL-Syferfontein-approaching 2 mt-64% wear!! Greenside Chain achieved 1,94 mt in 21 months-zero Breaks-Compared to Single Sprocket 1 mt-2 Breaks Matla HM9 life 1,6 mt-sprocket Changed at tonnes ZERO Breaks HM31AAA-expected 1,5 mt plus-zero Breaks to date

10 Dual Sprocket Conveyor Chain-SA Field Results New Denmark-Dual Sprocket DA of HM31-AAA at tpm for 6 months or tonnes plus each-no Downtime-11% to 18% Wear Expecting to 1 million tonnes 1 of HM31-AAA installed 3 months ago tonnes- 7% wear Original Equipment Chains reportedly achieved to tonnes before changing Average Chain Downtime 61 hours before changing

11 Conveyor Chain-Analysis-Typical Mine Downtime related directly to Conveyor Chain issues was analysed & normalised This equated to over 4 hours/machine/month or tonnes pa at 350 tonnes per hour At a cost of say R100/tonne of lost production, this equates to R1,68 million per CM per annum (as an example) The Double Sprocket Flight Chain with ZERO or very few breakages will dramatically reduce Downtime

12 Conveyor Chain Analysis-Khutala Estimates No 2 Seam-9 Sections-1,3 to 1,5 mt throughput/chain No 4 Seam-4 Sections-1,1 to 1,4 mt throughput/chain Both Seams estimate 33 to 50 hours Downtime over the life of the Chain related to the Conveyor Chain Say 50% or 20 hours was directly related to Conveyor Chain Breakages-about 1,15 hours per month

13 Conveyor Chain-Khutala Estimates (cont) At 350 tonnes per hour and R100 per tonne opportunity cost, lost production equates to R per machine per chain or R per machine per annum (assuming tonnes per month) The Double Sprocket Flight Chain with ZERO or very few breakages will dramatically reduce Downtime

14 DA-3522-A New Developments Cost Savings through Extra Life & Reliability

15 Dual Sprocket Conveyor Chain-Safety

16 Dual Sprocket Conveyor Chain-Noise 27% Less Operator Noise Exposure Conveyor Chain Sound Data Average Sound Readings in dba DA-550-A SINGLE STRAIGHT DA-550-A SINGLE TURNED DA-3502-A DUAL STRAIGHT DA-3502-A DUAL TURNED Series Study by National Institute for Occupational Safety & Health

17 What else can be done to reduce noise Chain tension Review and correct the chain path Chain guides-check in place & working Conveyor or pan pivots-check Check bolt-on cla (centrifugal loading arm) tips-fixing Condition of the wear strips Smooth transitions at the conveyor and pan pivot points Attention to return roller and return deck entrance

18 CINCINNATI MINE MACHINERY SA Based in emalahleni Strategic Inventory close by 24/7 Response & Delivery to mine Regular Site surveys, on Site Training & Assistance Thank You for the opportunity to present our DA-3502 Dual Sprocket Conveyor Chain