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December, 2021 Obtained the license of recycle EPA incinerator fly ash (medical waste treatment facility). (83 tons/month)
November, 2021 Won 2021 Taiwan Circular Economy Excellent Enterprise Two Stars Award. (highest level)
November, 2021 Obtained the experiment license of recycle electroplating sludge, led and the led compound, and inorganic sludge(zinc-contained sludge) from Ministry of Economic Affairs. (550 tons)
August, 2021 Obtained the license of recycle general waste from Taoyuan EPB Xinrong BOO incinerator. (19,000 tons)
May, , 2021 Obtained the license of recycle 15-40% zinc-contained product from recycle plant or treatment facility. (4000 tons/year)
February, 2021 Obtained the tender of Taoyuan incinerator washed fly ash recycle plan. (amount: 9,400 tons/year)
January, 2021 Obtained the finalized EPA Official Letter, titled "The Second Environmental Impact Difference Analysis Report of the Environmental Impact Statement of EAF Dust Resource Recycling Site Establishment Modification Program" for reference, added 3 categories for total 12 additional waste resources.
  Obtained the license for reusing of EAF Dust(code: A-7101) from other electric arc furnace( including carbon steel and stainless steel electric arc furnace) and illegal dumping site in Taiwan.
December, 2020 Treated 1,644 metric tons of the EAF dust dumped illegally in Dadu Riverside, Zhanghua County free of charge.
November, 2020 Won the Sustainable Individual Performance at the 13th Taiwan Corporate Sustainability Awards (TCSA) -Circular Economy Leadership Award and the Gold Award of the Corporate Sustainability Reports Award.
April, 2020 Treated 6,397 metric tons of the EAF dust dumped illegally in Xinfeng Township, Hsinchu County free of charge
December, 2019 Treated 7,258 metric tons of the EAF dust dumped illegally in Xinfeng Township, Hsinchu County free of charge
August, 2019 Won the 5th Taiwan Mittelstand Awards from Minister of Economic Affairs.
February, 2019 The total volume of EAF dust treated since June 1999 has reached two million tons.
December, 2018 Treated 1,464.31 metric tons of the EAF dust dumped illegally in Xinfeng Township, Hsinchu County free of charge
January, 2018 The Company's stock was listed on the Taiwan Stock Exchange for trading.
December, 2017 Obtained the general permit for reuse of EAF dust from the Industrial Development Bureau, Ministry of Economic Affairs.
February, 2016 Obtained the general permit for reuse of the contaminated soils from the EPA.
December, 2015 Obtained the ISO 9001 certificate.
  The annual capacity of the second rotary kiln for treating dust reached the maximum capacity 109,900 metric tons.
  Technology improving and upgrade completed, Significantly increase production capacity.
August, 2015 Obtained ISO14064 assurance statement.
December, 2014 The annual capacity of the first rotary kiln for treating EAF dust reached the maximum capacity 89,000 metric tons.
July, 2014 Obtained OHSAS18001 certificate.
December, 2013 The volume of EAF dust treated by the second rotary kiln reached 100,000 tons the original design capacity.
March, 2013 The total volume of EAF dust treated since June 1999 has reached one million tons.
December, 2012 The annual capacity of the first rotary kiln for treating EAF dust reached 86,932 metric tons.
December, 2010 Technology transfer to newly build EAF dust recycle plant of VMZ Group in Brazil
June, 2010 Completed the second rotary kiln, began test run and operate formally.
January, 2007 Obtained the ISO14001 environmental management system certification of the British Standards Institution (BSI).
July, 2004 The annual processing capacity for EAF dust (wet basis) exceeded 60,000 metric tons.
December, 2003 The annual processing capacity for EAF dust (wet basis) exceeded 50,000 metric tons, reached the original design capacity.
December, 2001 Obtained a license for joint clearance and treatment of the business waste EAF Dust from the Ministry of Economic Affairs.
February, 2000 Obtained the factory registration certificate from the Ministry of Economic Affairs.
August, 1999 Approved by extraordinary general meeting Mid-North part Environmental Engineering Co., Ltd. and south area Industrial Co., Ltd. merged and change the name into Taiwan Steel Union Co., Ltd.
June, 1999 The Company first rotary kiln began test run and operate formally.
December, 1996 The Industrial Development Bureau, Ministry of Economic Affairs, approved the establishment of a joint treatment system for EAF dust and waste.
May, 1995 Mid-North part Environmental Engineering Co., Ltd. was formally established.

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