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Flow Sheet Development of Three Geographically Distinct Chromium-Bearing Ores

Sep 13, 2010

Economic Sustainable Power for Mineral Processing

Sep 13, 2010

Combined Flow Sheet for Treatment and Recycling of Municipal Solid Waste (MSW) with Complex Morphological Composition

Sep 13, 2010

Electroosmotic Dewatering and Consolidation of Mineral Waste Tailings

Sep 13, 2010

An Evaluation of Froth Recovery Measurement Techniques

Sep 13, 2010

Electrochemistry Measurement, Using Chena Analyser, to Investigate Selective Separation of Pentlandite and Pyrrhotite

Sep 13, 2010

Pressing-Drill Method - A Representative Method for Taking Analysis Samples from Recycled Materials

Sep 13, 2010

Selective Removal of Arsenic from Acid Mine Drainage Containing Ferrous Ion Using Sulfide Precipitation Method

Sep 13, 2010

Beneficiation of Coal Fines from Tailing Ponds of Tuntbilek Washing Plant

Sep 13, 2010

Electro-Flotation Research on Fine Cassiterite

Sep 13, 2010

Study on Mineral Processing Technology for a Refractory Iron Ore

Sep 13, 2010

Comparison of Industrial Cyanide Destruction Processes

Sep 13, 2010

Fine Coal Evaluation by Gravity Methods

Sep 13, 2010

Flow Sheet Simulation of Municipal Waste Treatment Processes

Sep 13, 2010

Dynamic Simulation of an Alumina Refinery

Sep 13, 2010

By M Watts, P Lindsay

Herbert Stream, a tributary of the Waimangaroa River on the Stockton Plateau, has elevated metal concentrations and low pH characteristic of acid mine drainage (AMD). Dissolved aluminium concentrations average 8.3 ppm, iron 1.4 ppm, manganese 0.69 ppm, and zinc 0.12 ppm and pH ranges from 2.8 to 3.2. Flow rates range from 2.3 to 26.6 L/s with an average of 5.3 L/s. To determine the effectiveness of different treatment strategies, a small amount of the AMD was diverted through three small-scale passive AMD remediation systems over an eight month period. These included a reducing and alkalinity producing system (RAPS), a limestone leaching bed (LLB), and an open limestone channel (OLC). Both the RAPS and the LLB performed well, effectively removing metals and restoring pH. The RAPS lowered aluminium concentrations by up to 99%, iron 97%, manganese 95%, and zinc 80% and the LLB lowered aluminium concentrations by up to 99%, iron 99%, manganese 92%, and zinc 91%. The pH was restored to between 6.4 and 7.4 by the RAPS and to between 7.3 and 7.9 by the LLB. The OLC performed well as long as the residence time was similar to that of the other treatment systems. OLC removal rates for aluminium was up to 99%, iron 94%, and manganese 21%, and the pH was restored up to 5.6. Due to its simplicity and effectiveness, it is proposed the LLB be constructed to fullscale size to treat the entire Herbert Stream.

Jan 1, 2007

Continuous pH and Pulp Potential Measurements During Complex Sulfide Ore Flotation

Sep 13, 2010

Reverse Cationic Flotation of Iron Ores - Floatability of Amphiboles at Depression of Iron Oxides by Starch

Sep 13, 2010

Possibilities for Flotation Acoustics Monitoring - A Review

Sep 13, 2010

An Ammonia Leaching-Solvent Extraction-Electrowinning-Flotation Process for Copper Oxidised Ore Treatment

Sep 13, 2010