China Grinding Steel Ball,grinding media
TWO of the Gold Fields' premier mining companies, St Barbara and manager of Kalgoorlie's famous Super Pit, Kalgoorlie Consolidated Gold Mines (KCGM) Crusher Hammer Head selling leads are vying for the honors in the 2015 Golden Gecko Awards Which are to be announced this week.
The two companies are among eight finalists in the Grinding Cylpebs WA resource sector followers have used innovative technology to offset Their operation's environmental impact.
St Barbara's Gwalia underground operations near Leonora have put the exhaust emissions from Their gas / diesel power plant to good use by utilizing the the Crusher Hammer Head exporters Resultant waste heat energy to power an absorption chiller to cool the mine's air.
As part of the plants operations Expelled gas is at 510⁰ degrees from Their Grinding Steel Media Ball exporters generator exhaust Which is then used to energize a Lithium Bromide solution, According to St Barbara Project Engineer Peter Kyselica.
This solution then absorbs energy from the coolant water Which can be cooled as low as 1.5⁰ Celsius without freezing the system.
Exhaust stacks outside the chiller plant at St Barbara's Gwalia operations. Credit: St Barbara.
"In fact-it could cool 8000 Beer cans a minute," Mr Kyselica says.
"The project was to upgrade the mine cooling system Because The mine has deepened, without Increasing energy consumption, and it has been so successful That we use less gas than before.
"This is a real achievement as underground mine air cooling was The Biggest consumer of energy for the mine," says Mr. Kyselica.
Because it is a closed fully-automated China Ball Mill Liner Plate system it only needs opening up for maintenance every 10 years, Which is an added bonus.
"This is the first time in the Southern Hemisphere That this system has been used for mine cooling," says Peter Kyselica.
"It's the most Often used in hospitals as it is so clean, it saves about 5,000 tonnes of carbon emissions a year."
An absorption chiller being installed at Gwalia. Credit: St Barbara.
Meanwhile, KCGM's award entry represents the culmination of what the company's Environment and Social Responsibility Manager Michelle Berryman says is KCGM's 20-year journey to Eliminate atmospheric emissions from Their ore processing at the Gidji Roaster.
Roasting gold-bearing sulphide ore is still Considered the most efficient and cost effective method to recover gold, however, it is a major source of atmospheric sulfur dioxide and mercury emissions.
Since 1988 KCGM has continually reduced These emissions culminating in the latest installation of ultra-fine grinding (UFG) mills.
The first UFG mill was commissioned in 2001 and the last, fitted with ceramic grinding media, in 2015.
This resulted in the closure of the roaster and the end of mercury and sulfur dioxide emissions from the plant Gidji.