subject: The Latest Move Of Australian Silver Producers Two [print this page] The quad rolls crusher has been commissioned and is now ramping up to peak throughput rates of over 140 t/h, with an overall average of 80% of the 150 t/h design rate achieved to date.The crusher is currently attaining a steady state of 140 t/h and delivering a product size of 100% passing 3.8 mm, which marginally exceeds the design criteria of 100% larger than 4 mm.Further, the commercial-scale Merrill Crowe circuit, which is used to extract the silver from solution, replaced the pilot scale plant on August 24. The circuit is currently running at nameplate capacity of 200 m2/h, resulting in a significant boost to bullion production. The automation package is expected to further enhance overall process productivity and the overall silver recovery circuit is currently achieving recoveries from solution of more than 96%, compared with the targeted level of 95%, based on previous testwork.Henan Hongxing Mining Machinery Co., Ltd is a joint-stock mining machinery manufacturing enterprise integrated in scientific research, production and marketing. It is located at the High & New Technology Industries Development Zone of Zhengzhou,China with an area of 50 thousand m2 which includes 15,000 m2 of standard heavy duty industrial workshop. Equipments are more than 160 pieces, including large and medium sized metal processing, riveting and installing equipments. There are more than 660 workers including 80 administrators with secondary and senior occupational titles and engineering technicians. In order to promote the competitive strength, the advanced technologies have been introduced from America, Germany, Japan and Australia, which established the international advanced production line, first-class modern testing base as well as research centers of sand maker, mill and mine-selecting equipment. Scientific management, advanced processing technology and innovative manufacturing theory make the company become the mining machinery manufacturing and exporting base in China.
There could not be a better time to start a silver mine, with silver prices continuing to strengthen and providing us with an exceptional cash operating margin. With our life-of-mine unit operating costs forecast at A$5/oz, this equates to a cash operating margin at the current spot price of around A$26/oz, which is a very healthy proposition for a company entering a production ramp-up phase, he says.We are looking forward to the next milestone, which includes the start of mining and the ramp-up to full commercial production at a yearly production rate of 1.5- million ounces a year to 2-million ounces a year by the end of this year, King added.In addition, installation of the new bullion circuit was completed in July, with the circuit commissioned and producing silver bullion on site. The bullion circuit has a yearly production capacity of two-million ounces.Initial silver production has been based on reirrigating the existing silver-rich heaps, which have been estimated to contain about 250 000 oz of recoverable silver.Further, the company-owned rotary air blast rig is currently drilling the prospective silver and base metal corridor, while the contract reverse circulation rig is undertaking the first phase of grade control drilling. It will then target further mineralisation extensions along the strike and downdip.The heaps continue to leach the silver at a steady rate and, with over 210 000 oz of bullion already produced since trial processing started in April, the company is on its way to achieving its original 250 000 oz production target from this source. The second 100 000 oz of silver production was achieved in five weeks and reflects both the improved heap dynamics, as well the commissioning of the new Merrill Crowe circuit.This early production has enabled the company to take advantage of strong silver prices and generate significant early cash flow.Alcyone has over 200 000 t of medium-grade to low-grade ore on the run-of-mine stockpile that is being used for the initial wet commissioning of the plant, with a further 180 000 t of higher- grade ore already exposed within the opencut, ready for extraction.Laboratory testing of the product being stockpiled has indi- cated that the leaching rates should achieve the forecast leaching rates as defined in the original testwork, and irrigation of the newly stockpiled material has started, in order to provide percolation results.Owing to the progress of the plant commissioning, Alcyone started mining in the Twin Hills openpit in late September, which will provide a regular ore feed to the plant, and enable the company to increase production to the targeted yearly rate of 1.5-million ounces a year to 2-million ounces a year by year end.As the professional manufacturer of complete sets of mining machinery, such as Sand washing plant,Wet magnetic separator, Henan Hongxing is always doing the best in products and service.Drum dryer:http://www.crusher-machine.com/24.html screw classifiers:http://www.crusher-machine.com/27.html
