The mine plan targets higher grade ore zone at the early phase of the project to feed into the process plant in order to produce 100,000 oz per annum for the first 5 years, and thereafter lower production output as the grade drops and stockpiles are treated. Over the life of the project, 27.13 Mt of ore will be mined and delivered to the processing facility. Stripping ratio of 2.67:1 over LOM
Located approximately 15km to the east of Cloncurry, the project is hosted within the mining lease ML7147, which is one of the six mining leases held by Malachite Resources. The company also holds two exploration permits (EPM18189 and EPM18908) in the region. Gold mineralisation at Lorena is hosted within a south-west steeply dipping fault system comprising silicified and brecciated shale and siltstone of the Toole Creek volcanic formation. The mineralisation is classified as massive and occurs in conjunction with stringer sulphide type and copper-gold mineralisation. The mineralisation is developed within steeply south-dipping shear zones, up to 12m-wide striking east-west and northwest-southeast within the license area. The zones host sedimentary units, breccias and fault gouge with quartz-carbonate-sulphide pods. The sulphide pods are made up of arsenopyrite, pyrite, pyrrhotite, chalcopyrite and bismuthinite. The deposit also hosts minor copper mineralisation within the main gold See full list on mining-technology.com The Lorena gold mine is estimated to contain JORC-compliant mineral resources of 179,500t, while contained gold is estimated at 56,600oz grading 2g/t. See full list on mining-technology.com Malachite Resources entered a 50/50 joint venture agreement with BCD Resources (supported by MKS Switzerland) in July 2013 for the first stage development of the gold mineand to construct a 120,000t capacity concentrate plant for treating the produced ore. The JV was, however, terminated in May 2015 as BCD did not go ahead with the mine development. Malachite reached an agreement with Ore Processing Services (OPS) in March 2016 for developing and operating a modular mineral processing plant to treat the ore produced at Lorena. Malachite also reached a partnership and funding arrangement with OPS and Cloncurry Gold Recovery Management (CGR) for the development of the project. Malachite will hold a 55% joint venture interest in the project, while CGR and OPS will hold 30% and 15% respectively, as part of the agreement. Chinova Resources holds a 70% stake in CGR, while private mining and contracting company BIM Gold holds the remaining 30%. BIM Gold is acting as the mine operator, whil See full list on mining-technology.com Conventional open-pit mining method, including drillingand blasting to remove waste rock, is applied in the first stage of Lorena mine. An estimated 250,000t of ore is proposed to be mined from the open-cut operation. Conventional underground mining methods at a depth of 200m will be used in stage two underground development of the mine. Run-of-mine (ROM) ore passes through a two-stage crushing process, using a jaw crusher and a cone crusher, before passing through the milling circuit. The circuit operates at 20 tonnes per hour (tph) and comprises a grinding mill operating in a closed circuit. Slurry from the grinding circuit will be directed to the flotation circuit through a trash screen. At the flotation circuit, the material passes through roughing, scavenging and cleaning processes. The concentrate then passes through to the magnetic separation circuit, where the pyrrhotite is removed by using LIMS drum magnetic separators. The project is anticipated to produce approximately 27 See full list on mining-technology.com Gold concentrate produced from the first stage open-cut operations at Lorena will be sold to MKS Switzerland, under a letter of offer signed in July 2015. See full list on mining-technology.com Malachite Resources entered a financing term sheet with ResCap Investments in October 2016 for a $5m loan facility for developing the Lorena gold project. See full list on mining-technology.com The mine can be accessed from the Lorena mine through the Flinders Highway and the unsealed Fisher Creek Road. Power is being supplied by three 600kVA generators installed near the new processing plant. Water required for the mine is provided by the nearby production bores, while potable water is collected from groundwater pumped into the water tank. See full list on mining-technology.com Project at a Glance. Contents on the CD Rom. Gold is recovered from industrial, dental, porcelain or jewellary scrap. For refining, gold bearing alloys are processed on different methods, depending on their carat content.
We use alternative gold recovery methods in some processing plants to accommodate different ore characteristics or other requirements. For example, ore that has a high level of sulfide minerals or carbon (or both) is called refractory ore. Refractory ore resists normal processing methods as the high sulfide minerals trap gold particles, making it difficult for the cyanide to reach the gold and leach it.
Leaching (Gold Dissolution) Once Vat is loaded with ore, is flooded with a leaching solution of a desired cyanide concentration (usually 600 to 1000 ppm) and pH between 10 to 11 at ambient operating conditions through the filter section of the floor or added to the top of the ore charge. Picture 3: Left is the loading of tails read for leaching process, while right hand side is the picture of tails which have already turned into solution (dissolution) by reaction of gold present into tails
MONTREAL, March 24, 2021 (GLOBE NEWSWIRE) -- Dynacor Gold Mines Inc. (TSX-DNG) (Dynacor or the "Corporation"), an international gold ore industrial corporation servicing ASMs (artisanal and small-scale miners), today announced a US$1.8 million investment through internally generated cash flow to expand its Veta Dorada ore processing plant capacity by 43% in Chala, Peru. The expansion already underway will enable Dynacor to process 430 tonnes per day (TPD) from its current nameplate 300 TP
The Metates project is one of the largest, undeveloped disseminated gold and silver deposits in the world. A NI 43-101 report by Independent Mining Consultants of Tucson, Arizona outlines proven and probable reserves of >18 million ounces of gold, >500 million ounces of silver and >4 billion pounds of zinc. The metal prices assumed for the reserves are $1,200 per ounce gold and $25 for silver per ounce at a cut off grade of 0.35 g/t gold equivalent. Metates is 100% owned by Chesapeake and is
Initial ore processing commenced in early February 2019 using low-grade stockpiles. The mill employs a conventional gold circuit comprising crushing, grinding, gravity separation and cyanide leaching with a carbon-in-leach circuit, followed by cyanide destruction and filtration of the tailings for dry stacking. Metallurgical recoveries are expected to average 96%.
The Mercur Gold Project consists of a 2700 tonne (3000 ton) per day carbon-in-leach (CIL) gold plant. In addition to the process facilities, the project incorporated the following: a) Upgrading and modifying of the existing 11 km (7 miles) of Tooele County road, from State Highway 73 to the project area b) Site earthwork, including construction sediment dams, project area roads and initial mine haul roads c) Preproduction stripping of Mercur Hill-Lulu ore body d) Tailings disposal, including embankment, pipeline and recovery systems e) Offices, laboratory, shops, warehouse and security facilities f) Thirteen km (8 mile) water supply line and two 365-m (1200-ft) deep water wells. In order to meet both objectives, initial discussions centered on the plot plan and the best location for the facilities, including consideration of the possible need for an oxidation circuit and future expansion requirements. The approximate sizes of the major process areas were developed and “cutouts” made See full list on 911metallurgist.com The engineering design schedule for the project required a multiple task approach with design activities underway on several areas at the same time. Communication between each activity was maintained by establishing a project area where all major activities took place. Frequent design development meetings were held so that representatives of all aspects of the project could provide input. The initial flowsheet contained several areas which required further definition. Test work was underway to determine the residence time required for CIL and a study was conducted on the need for pressure oxidation. While this work was going on, specifications for the major process equipment in the comminution circuit were being written. Several alternative layouts were developed for the mills and mill drives. In order to quickly establish the optimum configuration of the mills, a styrofoam model was constructed representing the mills, cyclone feed sump, cyclones, screens and pumps. The requirements See full list on 911metallurgist.com In addition to the process facilities, the project includes a mine services building which houses a truck shop, mining engineering and geological offices, and a machine shop and maintenance area. Due to the severe space restrictions on the site, all of these facilities were combined into a single unit located so that the mine haul trucks could access the building without entering the process area and so that the process maintenance facility could be near the major process facilities. In addition to the mine services building, a laboratory building, administration building and gatehouse were provided. Other ancillary facilities included water supply facilities, electrical distribution and a tailings pond embankment. The 79-m (260-ft) high tailings pond embankment design required extensive field work, which was accomplished during the fall of 1981. With this work completed, the design and permitting process inherent in a structure of this type was completed over the winter and the fie See full list on 911metallurgist.com To conduct our business and produce gold, certain inputs such as ore-bearing resources, people and machinery are required. We invest in skills enhancement, technology development and application, and in prospecting for and developing our mineral resources and ore reserves, to ensure the economic viability and sustainability of our business.
Ore from the Cuiabá and Lamego mines is processed at the Cuiabá gold plant. The concentrate produced is transported 15km by aerial ropeway to the Queiroz plant for processing and refining. 5. Yanacocha, Peru. 340 koz. Yanacocha gold mine is located in the province and department of Cajamarca, approximately 800 kilometers northeast of Lima
The Geita gold deposit is mined as a multiple open-pit and underground operation (since 2016) and will continue to operate as such until the entire economic open-pit Mineral Resource is exhausted. The mine is currently serviced by a carbon-in-leach processing plant with an annual capacity of 5.1Mt. 5. Tarkwa, Ghana. 526 koz.