Liquid Analysis for Metal Extraction - 12 Pages

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Liquid Analysis for Metal Extraction

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Metals Extraction and Processing Visualize > Analyze > Optimize ROSEMOUNT EMERSON Ana lytica I Process Management

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TRUSTED AROUND THE WORLD: THE MOST ADVANCED LIQUID ANALYSIS SOLUTIONS LIQUID ANALYTICAL SOLUTIONS FOR METALS Visualize the benefits of optimizing yields and minimizing needed. Processes will vary depending on the metal expenses for metal extraction processing. involved, the grade of ore, and the technology employed. Analyze with Emerson’s exclusive PlantWeb® concept using This brochure shows examples of how Rosemount Analytical a scalable control system with independent devices and liquid analytical products are used throughout extraction final control elements that link these various steps...

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Cyanide-based extraction Precious metals such as gold and silver are commonly processed using cyanide compounds. Cyanide dissolves the precious metal by forming a Jet Spray Cleaning Attachment PERpH-X High Performance pH Sensor washed with caustic to remove the gold cyanide, and the gold metal is produced using electrowinning. Due to the rapid reactions taking place in an agitated leach process, automatic pH control is strongly recommended. See Application Data Sheet #3300-08 for more information on cyanide leaching. When the pregnant liquor contains large amounts of silver, zinc metal is...

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Flotation Metals are typically recovered from a raw ore in a combined form with other metals. Processing these metals requires concentrating the desired metals using physical and chemical processes that select the product metal over the impurities. One Model 396P Insertion and Submersion pH Sensor Model 5081 Transmitter proven technology employed in copper sulfide ore processing is flotation, in which copper sulfide particles are lifted on a froth while iron and other common impurities are left behind. In the flotation process, crushed sulfide ore (containing 1 to 2% copper), along with...

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Raw bauxite (mostly Al2O3·H2O) ore contains iron oxide and silica that are removed by treatment with caustic in a digester. This dissolves the alumina and allows separation and purification in later steps. electrical conductivity which tends to drop as caustic reacts with the bauxite ore. If insufficient caustic is present, the conductivity transmitter will read low and the caustic feed can be increased. Impurities remain solid in the form of "red mud" that tend to scale the process equipment, requiring frequent cleaning. Emerson’s model 242 flow through toroidal conductivity sensor has...

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Sulfate Process In the sulfate process, ilmenite (FeTiO3) is soaked in sulfuric acid to dissolve the titanium as titanium sulfate and bind the iron as solid ferrous sulfate for removal by settling. The titanium sulfate reacts with caustic and water in a hydrolysis tank at high temperature to produce a hydrated form of titanium dioxide. This precipitate is filtered and washed to remove traces of iron impurities. Other metal ions such as potassium, phosphorus, or aluminum may be added to control particle size and durability. The hydrate paste then undergoes a high temperature calcination...

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FINISHED PRODUCT PURIFICATION and are the sensors of choice for liquids with suspended solids. The model 228 sensor is injection molded of polyetheretherketone (PEEK), an extremely robust engineering thermoplastic. Steel Treatment Stainless steel is an alloy of various different formulations that is widely used in industry. Each different formulation has different specifications Model 228 Submersion/Insertion Sensor for the final product but despite the best production methods some off-spec product may on the surface of the rolls and can therefore be removed by surface active chemical...

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WASTE DISPOSAL Keeping it clean Waste products from mining and refining operations can be in the form of liquid, gas, and solids. Liquid analytical products are involved in all of these operations. They help minimize disposal costs involved with chemicals adhering to tailings, toxic cyanide, noxious gases, and acid mine runoff. Emerson’s analytical sensors respond quickly to changes in pH and ORP, protecting both the environment and the mine from the dangerous effects of these chemicals. Model 3500 Rechargeable pH Sensor Oxidation Cyanide, commonly used in precious metals extraction, is a...

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WASTE DISPOSAL Model 228 Submersion/Insertion Sensor near any operating mine. These solids typically contain various sorts of heavy metal compounds in ore form and will have traces of acid or caustic used in the mining process. Rinsing the tailings to reclaim these chemicals and regenerating or reusing them renders the tailings less hazardous. Monitoring the rinse water for electrical conductivity is a low-cost method of reclaiming the chemicals without wasting water. The recommended sensor is the model 228 toroidal conductivity sensor which monitors water conductivity levels down to below...

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FOUNDATION fieldbus Compatible Wireless THUM Adaptor compatible Multi-lingual Menus Timer control only HART Compatible Available Approvals pH/ORP/ISE, Conductivity, Resistivity, % Concentration, Dissolved Oxygen, Ozone, Flow, Turbidity, Chlorine * * (Total, Free, Monochloramine, pH Independent Free Chlorine) Available Measurements (future option) Number of Sensor Inputs Area Classifications Lithium power module Power Requirement Advanced Diagnostics Yes Capability Timer control only pH/ORP/ISE, Contacting Conductivity pH/ORP, resistivity/conductivity/TDS, % concentration, ratio...

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PLANTWEB ® BRINGS IT ALL TOGETHER Increase Accuracy and Throughput, Reduce Costs – PlantWeb Makes the Difference MORE ANALY TICAL SOLUTIONS FROM EMERSON PROCESS MANAGEMENT Rosemount Analytical field devices are core components of the PlantWeb digital plant architecture, and capture rich diagnostic data about the health of the device, as well as the process itself. Device functionality is presented at the user interface in ways that are consistent, intuitive, and easy to use. Emerson is the world’s largest provider of gas chromatography, process gas, combustion and environmental analysis...

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