Chifeng Kumba Hongye Zinc

Acid Plant Database May 16, 2025

Owner	Chifeng Kumba Hongye Zinc Company Limited
Location	Inner Mongolia China
Background	-
Website	www.exxaro.com
Plant	-
Coordinates*	-
Type of Plant	Metallurgical
Gas Source	Zinc Fluid Bed Roaster
Plant Capacity	Phase I - 36,000 MTPA
SA/DA	DA
Emissions	-
Status	-
Year Built	-
Technology	-
Contractor	ENFI
Remarks	-
Pictures	-
General	This is an electrolytic zinc refinery located in Chifeng, Inner Mongolia Autonomous region, People’s Republic of China, about 500 km north-east of Beijing. As a first step for potential future investment in the People’s Republic of China, Exxaro established an equity joint venture with an existing refinery facility and the Baiyinnuoer lead and zinc mine as a major supplier of feedstock. Exxaro has a 60% shareholding in phase 2 of this venture and a 30% economic interest in the expanded operation. The joint venture recently expanded capacity from 24ktpa of zinc to 50ktpa (phase 2). The expanded operation reached design capacity of 48ktpa at the start of 2005, aiming, through continuous improvement, to reach production of 50ktpa by the end of 2007. A decision has been made to participate in the Chifeng phase 3 expansion, in which smelter capacity will be increased further to 110ktpa. Exxaro will participate in the expansion by swapping some of its shareholding in Phase 2 company into the new Phase 3 company. The Chifeng NFC Kumba Hongye Zinc Smelting Project includes four phases with total production capacity of 230,000 t/a zinc ingot, 2,400 t/a electrolytic copper and 350,000 t/a sulfuric acid. The project production capacity takes a lead in the industry in China and the equipment is also advanced in the same scale project in China. At the same time, the project also creates a precedent in China of recovering copper from purification residue to obtain cathode copper, as well as a new profit growth point for zinc smelting enterprises. In addition, the process recovers silver from leached residue with floatation to obtain silver concentrate and recovers zinc through extraction from solution after flotation treatment, which also increased recovery of valuable metals. ENFI undertook all of the design and adopted the patent intellectual property technology of hot acid leaching -jarosite process, which is jointly owned by ENFI and Chifeng NFC Kumba Hongye Zinc Corporation. The technology is innovative in China and internationally advanced. After over 20 years, the practical production proved that the technology is sophisticated and reliable, featuring stable production, low operating costs, high rate of first class products and good economic returns. The technical and economic indicators of production management of the enterprise are among the international and domestic advanced level. The Phase IV works won the first prize of 2013 Outstanding Engineering Design Award (provincial and ministerial level), and the new technology for copper recovery from electrolyte purification residue of zinc hydrometallurgical process won a second prize in 2012 China Nonferrous Metals Industry Science and Technology Award.
References	-
News	-

MTPD - Metric Tonne per Day STPD - Short Ton per Day
MTPA - Metric Tonne per Annum STPA - Short Ton per Annum
SA - Single Absorption
DA - Double Absorption

* Coordinates can be used to locate plant on Google Earth


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