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Sulphuric Acid on the WebTM Technical Manual DKL Engineering, Inc.

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Acid Plant Database September 20, 2017

Owner Hindustan Zinc Limited

Hindustan-Zinc-Logo.jpg (4686 bytes) Vedanta-Logo.gif (13466 bytes)

Location 17 km from Vishakapatnam, Andhra Pradesh, India
Background Hindustan Zinc Limited was incorporated from the erstwhile Metal Corporation of India on 10th January 1966 as a Public Sector Undertaking. In April 2002, Sterlite Industries (India) Limited made an open offer for acquisition of shares of the company consequent to the disinvestment of Government of India’s stake (26%) including management control to Sterlite and pursuant to the regulations of SEBI Regulations 1997 acquired additional 20% of shares from public. In August 2003, Sterlite Industries acquired additional shares to the extent of 18.92% of the paid up capital from Government of India (GOI).
The Zinc business of Vedanta is managed within Hindustan Zinc Limited.  HZL is India’s only integrated zinc company, operating from mine to finished metal and supplied around 73% of India’s zinc requirements in 2005-06. At the base of the company is the Rampura Agucha mine with its low cost and consistently high grade ore. 
Website www.hzlindia.com
Plant Vizag Zinc smelter

17° 41' 47" N, 83° 13' 5" E 

Type of Plant -
Gas Source -
Plant Capacity -
Status -
Year Built -
Technology -
Contractor -
Remarks Tailgas scrubber
Pictures     Hindustan-Zinc-Vizag-4.jpg (19000 bytes)

Hydrometallurgical Zinc Smelter
Commissioned in 1977
Roast Leach Electrowining Technology with Conversion Process
Gone through a series of debotlenecking
56,000 tonnes per annum of Zinc

References -

March 13, 2012 - Hindustan Zinc Ltd (HZL) here has suspended production at the Visakhapatnam zinc smelter.  Sources said production was stopped as the management found bringing raw material from Rajasthan and using it at the local smelter unviable due to increasing input and freight costs. The local unit has a production capacity of 56,000 tonne a year.  HZL was incorporated from erstwhile Metal Corporation of India in 1966 as a public sector. During NDA rule, as part of disinvestment, its equity was sold to Sterlite Industries Ltd. The disinvestment was made in favour of Sterlite up to 65 per cent in three instalments, leaving the balance to the Government of India, financial institutions and the public.  It is an integrated zinc company with mines to finished metal. The zinc concentrate for the local smelter cotes from Rajasthan.  HZL produces zinc and related products – primary zinc, cadmium metals and sulphuric acid in bulk. Besides Vizag, HZL has smelters at Chanderiya, Debari and Dariba in Rajasthan.  Mr Ch. Prabhakara Rao, Vizag Zinc Smelter General Manager, said on Monday that the company would inform the date once they get the required raw material to resume production.  Due to the stoppage of production, nearly 300 contract workers have been affected.  Sources said that due to increase in supply of raw material by China, Australia, Canada, Bolivia and Kazaksthan, the management might have thought that importing was less expensive than incurring heavy freight cost on sourcing raw material from captive mines in Rajasthan.

October 22, 2009 - Vedanta Resources Group firm Hindustan Zinc today reported 2.55 per cent decline in its net profit at Rs 934.95 crore for the second quarter of the current fiscal over the year-ago period mainly on lower realisations from by-products like sulphuric acid sales.  "The positive impact of higher volume, operational efficiencies, lower input cost and rupee depreciation on net profit was more than offset by the sharp decline in the by- product credit realisations" the company said in a statement.  In July-September quarter last year, the company had a net profit of Rs 960 crore.  Hindustan Zinc, which primarily mines Zinc and Lead and Silver, also produces sulphuric acid and cadamium as by- products in bulk.  Rates of sulphuric acid have plummeted to USD 200 a tonne level after hitting a peak of around USD 1,200 per tonne last year, a Hindustan Zinc spokesperson said.  

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