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Acid Plant Database June 28, 2016
Owner | Korea Zinc Company Limited | |
Location |
Onsan South Korea |
|
Background | A subsidiary of Young Poong, Corporation | |
Website | www.koreazinc.co.kr | |
Plant | - | |
Coordinates* | 35° 25' 46" N, 129° 20' 43" E | |
Type of Plant | Metallurgical | |
Gas Source | Zinc Roaster | |
Plant Capacity | 1,000,000 MTPA | |
SA/DA | - | |
Status | - | |
Year Built | - | |
Technology | - | |
Contractor | - | |
Remarks |
Products: 98% H2SO4 25% Oleum Liquid SO3 |
|
Pictures | ||
General | Onsan
Refinery operates the refining facilities for both zinc and lead. The
refinery adopts the zinc residue-processing technology that maximizes the
recovery of valuable metals from zinc residue and changes the slag
environmentally sustainable. Also constructing zinc refinery and lead
refinery together in one plant has generated the synergy effects such as
higher recovery ratio of valuable metals, use of various-types of raw
materials, and lower waste discharge. Onsan Refinery, characterized as 'Custom Smelter', is able to process various kinds of zinc ores, successfully commercializing innovative technologies such as Direct Leaching Process, QSL process, and TSL process. Direct Leaching Process is a refining technology that directly dissolves the zinc from zinc concentrates in a special leaching process and thereby eliminating the need for traditional roasting and sulfuric acid plants. Presently, Korea Zinc is the only company that uses this process commercially in the world. QSL process is a process that produces lead bullion through oxidization and deoxidization by dissolving lead concentrate. It is zinc-refining technology that helps save energy and prevent pollution by using only one furnace instead of two. It is an excellent process in that it can process a variety of materials, and uses coal as a power of source, which is rather cheap. Zinc fuming is a process that recovers valuable metals like zinc, lead, and copper from zinc residue. This process contributes to minimizing environmental contamination by making clean slag, which has much less toxic materials than iron residue and is recycled as construction materials and/or raw material for cement. In addition, this process makes it possible to dispose the residue at the company's discretion; thus, not only it solves the lack of enough lot for pond, which is required for storage of the residue, but it also produces a lot of steam by recovering wasted heat in the process of production. The Top Submerged Lance (TSL) technology has been designed to solve the disposal problem of residues generated during the refining process, the problem that almost every refinery in the world has in common. This technology recovers valuable metals from by-products generated at the nonferrous metals refining process and turns the residue into environmentally stable insoluble slag by inserting combustible materials like coal and oxygen and causing turbulence, using Lance, which is installed in the upper parts of Smelting Furnace and Fuming Furnace. In a nutshell, this technology has a great advantage in that it processes environmentally instable matters into environmentally stable wastes and recycles them. These efforts for environment paid off as the company was awarded Environmental New Technology by the Ministry of Environment in September 2002. As mentioned above, Korea Zinc takes advantage of the world best technologies to recover the most valuable metals, discharges the least wastes and uses various materials including the recycled ones. All in all, Korea Zinc becomes and will maintain its presence as the world most competitive refinery. |
|
References | - | |
News |
June 28, 2016 - About a thousand liters of sulfuric acid leaked
from the construction site of a smelter factory in the country's industrial
city of Ulsan Tuesday, injuring six workers, firefighters said. The
incident took place at around 9:15 a.m. at a factory owned by Korea Zinc
Inc., the country's largest zinc smelter, some 414 kilometers southeast of
Seoul. The chemical at some 70 percent concentration leaked as six
workers were disassembling pipes for maintenance. All six are suffering from
burns, with three of them in critical condition, authorities said.
Firefighters said they are investigating whether there is any secondary
damage from the accident. Earlier in the day, about a ton of waste
chemicals comprised of hydrochloric acid, nitric acid, hydrofluoric acid and
water spilled out of a tank due to chemical reactions in Gumi, 261
kilometers southeast of Seoul. The firefighters completed cleanup of
the spilled chemicals at around 5:30 a.m., about three hours after the
incident was first reported. They said no harmful chemical substances
were detected near the site of the accident.
April 20,
2009 - GEA Bischoff received an order for 1 horizontal dry
electrostatic precipitator from Korea Zinc Co. Ltd. The off-gases from a new
lead smelter in Onsan, South Korea will be cleaned.
With this contract Korea Zinc Co. Ltd. continuous the longtime cooperation
with GEA Bischoff, who since the year 1993 supplied 11 dry and 20 wet
precipitators as well as various other gas cleaning equipment to this
client.
November 26, 2008 - Ausmelt Limited (AET) has signed a Licensing Agreement with Korea Zinc Co. Ltd (Korea Zinc) for the construction of two new Top Submerged Lance (TSL) technology furnaces for lead smelting. The two new furnaces will be built at Korea Zinc.s production facilities in Onsan, Korea. They will recover lead from up to 70,000 tonnes per annum of lead-bearing materials, including lead secondaries. |
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