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Hindustan Zinc Limited (HZL) is an Indian integrated mining and resources producer of zinc, lead, silver and cadmium.It is a subsidiary of Vedanta Limited. [4] Earlier it was a Central Public Sector Undertaking, sold by Government of India to Vedanta Limited when Atal Bihari Vajpayee and Bharatiya Janta Party Government was in power in the year 2003.
It was concluded that this method showed a greater than 90% extraction of zinc found in tailings. [10] This is a much higher recovery of zinc compared to more traditional methods such as bioleaching and conventional heating. [10] This also provides a viable economic retrieval method to be used for the Rampura Agucha mines tailings for zinc. [10]
In FY 2013, these operations delivered 870,000 tonnes of mined zinc-lead metal-in-concentrate, and 802,000 tonnes of refined zinc and lead. [52] Aluminium: Vedanta's aluminium output rises 2% to 584,000 tonnes in second Qtr of FY23 [53]
Chanderiya Smelter Complex is the world's largest lead-zinc smelter complex [1] in the Chittorgarh district of Rajasthan state of India. It is metallurgical type plant. The original complex was built from 1989 and commissioned in 1991. [2] It refines lead-zinc ore from Rampura Agucha. It produces zinc, lead, cadmium and other precious metals. [2]
HZL is the country's largest integrated producer of zinc and as of 2023, the company an 80% market share in primary zinc production in India. [90] [91] As of 2023, HZL is also the second largest integrated zinc producer in the world. [92] Rampura Agucha, owned by HZL, is the world's largest underground zinc mine as of 2022. [93]
The collapse was clearly due to non-solidification. Decantation is the first step for proper solidification. 8000 m3 of material with maximum head of 50 meter remaining in slurry form for days together indicate lack of decantation, which can be due to deficient installation of decantation equipment and/or monitoring system. 15 stopes had already been filled successfully, indicating sufficient ...
NML had developed a technology for extraction of zinc by the hydrometallurgical route for Hindustan Zinc Ltd. In this process, nitrogen was used as an inert gas to prevent oxidation of zinc, and in a once through mode rather than recovery and recycling.
Major disinvestment steps were taken in the past by the BJP-led NDA government between 1999 and 2004. BJP privatised the central government establishments such as central public sector units which included Bharat Aluminium Company (BALCO), Hindustan Zinc [4] (both to Sterlite Industries), Indian Petrochemicals Corporation Limited [5] (to Reliance Industries) and VSNL [6] (to the Tata group ...