Title:
PROCESSING OF SULFATE- AND/OR SULFIDE-RICH WASTE USING CO2-ENRICHED GASES TO SEQUESTER CO2, REDUCE ENVIRONMENTAL IMPACTS INCLUDING ACID ROCK DRAINAGE AND PRODUCE VALUABLE REACTION PRODUCTS
Document Type and Number:
Japanese Patent JP2014193455
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for reducing environmental loads caused by mine wastes, which will, over time, react with water and atmospheric oxygen to create sulfuric acid and dissolved metals, and which is a problem known as Acid Rock Drainage or Acid Mine Drainage, thus contaminating waterways and groundwater, leaving a long-term environmental problem.SOLUTION: A process for stabilizing a sulfate- and/or sulfide-rich waste material (comprising metal sulfate and/or metal sulfide minerals) and sequestering CO, comprises: exposing the waste material to a CO-enriched gas mixture; reacting the CO-enriched gas mixture with the metal sulfate and/or metal sulfide minerals; and forming a CO-depleted gas mixture and a carbon-containing compound, and at least one product selected from the group consisting of a purified metal or a metal-rich compound suitable for smelting or refining, sulfuric acid, sulfur, and sulfurous acid. The present invention also provides a system and apparatus for the process.
Inventors:
WILLIAM DOUGLAS EATON
Application Number:
JP2013229649A
Publication Date:
October 09, 2014
Filing Date:
November 05, 2013
Export Citation:
Assignee:
STRATEGIC METALS LTD
International Classes:
B09B3/00; B01D53/62; C02F11/00; C22B7/00; C22B13/00; C22B15/00; C22B19/30
Domestic Patent References:
| JP2005097072A | 2005-04-14 |
Foreign References:
| WO2011047070A1 | 2011-04-21 | |||
| US0126951A | 1872-05-21 | |||
| US4721526A | 1988-01-26 |
Attorney, Agent or Firm:
Nobuo Nishiki
Tomohiro Matsuda
Tomohiro Matsuda