Outotec Oyj engages in the provision of technology solutions and services that supports the entire life cycles of processes, including operation and maintenance. It operates through the following segments: Minerals Processing; and Metals, Energy and Water. The Mineral Processing segment provides suitable mineral processing solutions from pre-feasibility studies to complete plants and life cycle services. The Metal, Energy and Water Segments gives sustainable solutions for metal processing, renewable energy production, and industrial water treatment. The company was founded in 1910 and is headquartered in Espoo, Finland.

Barrick Gold Corporation (Barrick) is engaged in the production and sale of gold, as well as related activities, such as exploration and mine development. Barrick also produces copper, principally from the Zaldivar and Lumwana mines and holds other interests, including a nickel development project located in Africa. Barrick’s business is organized into seven primary operating segments: four regional gold businesses, a global copper business unit, an oil and gas business, and a capital projects group. Its producing gold mines are concentrated in three regional business units (RBU): North America, South America, and Australia Pacific. Its Copper business unit contains producing copper mines located in Chile and Zambia. Barrick’s North American RBU consists of its Cortez, and 60% interest in the new Pueblo Viejo mine. In October 2013, Barrick Gold Corporation completed the divestiture of its Yilgarn South assets (Yilgarn South) in Western Australia to Gold Fields Limited.

Gencor Ltd. engages in the mining of minerals. The company was founded in 1980 and is headquartered in Parktown, South Africa.

Cheni Gold Mines, Inc. is an American private company. The firm operates gold mines.

Yunnan Tin Microelectronics Materials Corp., part of Yunnan Tin Co., Ltd., is a Chinese company located in Gejiu. The firm manufactures and distributes semiconductor devices. It was acquired by Yunnan Tin Co., Ltd. on July 16, 2010.

Sumitomo Metal Mining Co., Ltd. engages in the mining business. It operates through the following segments: Mineral Resources, Smelting and Refining, Materials, and Others. The Mineral Resources segment includes the exploration, development and production of non-ferrous metal resources as well as the sale of ores and other products. The Smelting and Refining segment sells copper, nickel, ferro-nickel, zinc, lead, and precious metals such as gold, silver, and platinum. The Materials segment manufactures and sells lead frames, tape materials, bonding wires, and advanced materials. The Others segment includes real estate and technical engineering. The company was founded by Riemon Soga in 1590 and is headquartered in Tokyo, Japan.

Zijin Mining Group Co., Ltd. engages in exploration, mining, and smelting processing of gold, copper, zinc, and other metal mineral resources. It operates through the following segments: Gold Bullion; Processed Refined and Trading Gold; Gold Concentrates; Electrolytic Copper and Electrodeposited Copper; Refined Copper; Copper Concentrates; Other Concentrates; Zinc Bullion; and Others. The Gold Bullion segment consists of the production of gold bullion through the Group’s integrated processes such as mining, processing, and refining. The Processed Refined and Trading Gold segment covers the production of gold bullion by processing gold concentrates produced by the Group or purchased from external suppliers and gold bullion in the business of physical gold trading. The Gold Concentrates segment refers to the production of gold concentrates that are up to smelting standard by processing gold ore produced by the group. The Electrolytic Copper and Electrodeposited Copper segment comprises of the production of copper cathodes through the Group’s integrated processes such as mining, processing, and refining. The Refined Copper segment refers to the production of copper cathodes by processing copper concentrates produced by the Group or purchased from external suppliers. The Copper Concentrates segment is up to smelting standard by processing copper ore produced by the Group. The Other Concentrates segment focuses on the production of zinc concentrates, tungsten concentrates, lead concentrates, and iron concentrates. The Zinc Bullion segment engages in the production of Zinc Bullion. The Others segment consists of the sales income from sulphuric acid, copperplate, silver, iron, and trading income from copper cathodes. The company was founded by Jing He Chen on July 15, 1986 and is headquartered in Longyan, China.

Youyan Resources and Environmental Technology Research Institute (Beijing) Co., Ltd., established on 2019-06-26, Business scope includes environmental science and technology research and experimental development;Development and research of non-ferrous metal dressing and smelting technology;technology transfer,technical consulting,Technical Services;Environmental Protection and Monitoring Services;water pollution,Air Pollution Control;Solid waste treatment service;Soil Pollution Control and Restoration Services;Production of special pharmaceutical materials for environmental pollution treatment;Production of non-ferrous metal alloys;Manufacture of special ceramic products;Manufacture of optical coating materials;Engineering Investigation;engineering design;Technology Import and Export,Import and export,Agent import and export.(Market entities independently choose business projects in accordance with the law,Carry out business activities;Items subject to approval by law,Carry out business activities in accordance with the approved content after approval by relevant departments;Do not engage in the business activities of projects prohibited and restricted by the industrial policies of the state and this city.)

Cheni Resources, Inc., part of Qwest Ventures Ltd, is a company headquartered in Canada. The firm explores for, produces, and develops oil and gas properties. On February 29, 2000 Qwest Ventures Ltd acquired Cheni Resources, Inc. for $2.47 million.

Sentrachem Ltd., a subsidiary of Dow, Inc., is a South African company located in Sandton that manufactures specialty and agricultural chemicals. On December 31, 1997 The Dow Chemical Co., part of Dow, Inc. since September 2017, acquired Sentrachem Ltd. for $487 million.

Engineering Dobersek GmbH is a private company headquartered in M��nchengladbach, Germany, that engages in processing of non-ferrous metals. It was founded by Albin Dobersek, who has been the CEO since 1983.\nThe company says this about itself: ENGINEERING DOBERSEK GmbH is a leading German specialist company for planning, constructing and commissioning of turnkey plants and plant components in the fields of mining and metallurgy, water treatment, power and environmental engineering as well as chemical and special plant engineering. The continuously growing, midsize family-owned company with its head office in Moenchengladbach, Germany, was founded in 1983 by Dr.-Ing. Albin Dobersek and Tatjana Dobersek. In the year 1989 the company form changed into a German \"GmbH\". Our main scope of activities is in Eastern Europe and Central Asia. With eight co-operation partners in Bosnia and Hercegovina, Bulgaria, Kazakhstan, Macedonia, Russia, Serbia, Ukraine and Uzbekistan we maintain close contact to our customers. With our partner companies on site and the experience of more than two decades in plant construction ENGINEERING DOBERSEK GmbH is your competent, reliable partner.

Dorr-Oliver, Inc. is an American company located in Pittsburgh, PA, focused on manufacturing industries. The firm was acquired by KraussMaffei Technologies GmbH on March 01, 1995 for $53.47 million.\nThe company says this about itself: Ovivo is a global provider of equipment, technology and systems producing among the purest water and treating some of the most challenging wastewater in the industry. Ovivo is a powerful global brand with renowned trademarks, possessing more than 150 years of expertise and references in water treatment, supported by its proprietary products, advanced technologies and extensive system integration knowhow. Ovivo delivers conventional to highly technological water treatment solutions for the industrial and municipal markets, and leverages its large installed base of equipment around the world to offer parts and services to its customers. Ovivo is dedicated to innovation in an industry that is in constant evolution and offers water treatment solutions that are cost-effective, energy-efficient and environmentally sustainable.

Guangxi Ligui Environmental Protection Technology Co., Ltd., established on 1998-05-07, The scope of business includes agricultural,Environmental friendly,poverty alleviation,transportation,energy,culture,educate,Investment and consulting services for high-tech projects,Wastewater Treatment Project:To undertake waste water discharge1000Ton/day,CODProduction1.0Ton/Process design of environmental engineering treatment under 1 day(Operating with a competency assessment certificate);for waste water,exhaust gas,Treatment of Waste Residue Pollution and Manufacturing of Related Equipment,Sales and preparation of related pharmaceuticals,Sales(Except for specific national regulations);building,Environmental decoration and protection;Agricultural and sideline native products(In addition to grain and oil),Chemical Raw Materials(In addition to flammable, explosive, toxic and dangerous goods),Minerals(Except for state exclusive control),metal raw material,crafts,textile,electronics,rubber,building materials,Wujinjiaodian,department store,Office Supplies Sales.

Tongren Wanshan District Shenghe Mining Co., Ltd., established on 2013-03-26, Business scope includes legal,regulations,Those prohibited by the State Council's decision shall not operate;law,regulations,The State Council has decided to allow(approval)of,After approval by the examination and approval authority(approval)file management;law,regulations,The State Council has decided that a license is not required(approval)of,Market entities independently choose to operate.(mining development,processing,Sales;Research on Mercury Series Products,Production,Sales;High-tech product development,resource development;Other mineral product development,processing,refining;Mercury waste touching coal,Waste Mercury Residue Recovery,deal with;copper,selenium,antimony,lead,zinc,manganese metal,SiMn,Production, processing and sales of electrolytic manganese and other non-ferrous metals;HW29mercury waste(321-30-29,321-033-29,321-103-29);HW48Non-ferrous metal smelting waste(321-010-48,321-011-48,321-012-48,321-013-48,321-014-48,321-027-48,321-028-48,321-029-48).Involved in licensing projects,It should be operated after obtaining the permission of the relevant department)

Elf Aquitaine was a French oil company which merged with TotalFina to form TotalFinaElf. The new company changed its name to Total in 2003. Elf has been maintained as a major brand of Total.

Mengzi Mining and Metallurgy Co., Ltd., established on 1999-06-09, Business scope includes mining resource exploration,mining,Mineral dressing,to smelt,Production and operation of deep processing(Tin,antimony);Mining Engineering;sulfuric acid,Oxygen production and operation;black,Production and sales of non-ferrous metals;Operating import and export business;Non-ferrous metal technology development and technology consulting;Solid waste collection, utilization and disposal,Hazardous waste collection, utilization and disposal,Resource Utilization of Tailings and Slag;Scrap Metal Recycling;Design and Construction of Environmental Protection Projects;Production and sales of environmental protection equipment;Environmentally friendly new products,new technology development,Promotion and application;Environmental governance;Warehousing Services(Except for hazardous chemicals);Handling and unloading service;General cargo road transport.(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments)

Kuming Metallurgical Research Institute is a private company headquartered in China that engages in metallurgical research activities.