US7491372B2
The mass temperature exceeds 90° C. and can reach a few degrees above 100° C. The remaining two thirds of calcium carbonate are gradually added while the sulfuric acid is added. ... said copper salts obtained from the reaction of dry copper concentrate in a solution, to be washed in order to recover the copper in said solution, said dry ...
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Selection of thermophiles for base metal sulfide concentrate …
These two mixed cultures were grown separately through several serial cultures with the Lubin copper concentrate and then combined in a single culture to assess the concentrate leaching at 48 °C (Section 3.1) and the culture's adaptation to copper (Section 3.2). The high temperature culture of archaea (grown at 75–80 °C), …
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Indirect Drying of Copper Concentrate in a Rotating-Coil …
Indirect Drying of Copper Concentrate in a Rotating-Coil Dryer. Indirect Drying of Copper Concentrate in a Rotating-Coil Dryer. Ramon Blasco. 2016, Journal of Fluid Flow, Heat and Mass Transfer. See Full PDF Download PDF.
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Indirect Drying of Copper Concentrate in a Rotating …
PDF | On Jan 1, 2016, Rolando E. Vega and others published Indirect Drying of Copper Concentrate in a Rotating-Coil Dryer | Find, read and cite all the research you need on …
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The Beneficial Effects of Feeding Dry Copper …
furnace needs 7.4 GJ/h for the dry concentrate. The difference between drying wet feed in a smelter and a steam dryer amounts to 67.9 GJ/h of energy. This energy raises the off …
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Rotary Dryers Meet Demand for Drying Copper …
The benefits gained by drying copper concentrates prior to the smelter include: ¹. Reduced energy consumption. Lower volume of exhaust gas. Fewer harmful …
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Steam Dryer – Kumera – Creating Efficiency | Kumera …
Kumera Steam Dryer is a patented solution for drying copper concentrates and other abrasive materials. The construction has unique features, which allow high availability and consume less energy. Through Kumera Steam Dryer, a copper smelter can reduce the harmful emissions such as CO2, SO2, NOx and dust. Therefore, Kumera Steam Dryer …
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PYROMETALLURGICAL PROCESSING TECHNOLOGIES …
Keywords: Pyrometallurgy, Copper Concentrates, Arsenic Abstract ... dt is dry ton, wt is wet ton Process Options ... Temperature and oxygen potential play an important role in the rate of oxidative roasting of enargite in the temperature range 600°C - 900°C.
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Functionality of milk protein concentrate: Effect of spray drying …
Abstract. This study investigated the effect of spray-drying conditions on the resulting functionality of milk protein concentrate (MPC), utilizing specially produced mono-dispersed MPC particles. The particles were generated from a pilot microfluidic spray dryer at selected inlet air temperatures (77 °C, 107 °C, 155 °C and 178 °C).
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From copper concentrate to Cu-based metal oxides for …
Drying. The filtrate obtained in step (2) was placed in a drying oven and dried at 150 °C for 3 h. ... From the point of weight loss temperature, copper concentrate begins to lose weight at around 880 °C, which is about 130 °C lower than that of commercial copper oxide. There may be a decomposition reaction of a certain substance, or it may ...
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Options for Concentrate Drying Technologies when …
Options for concentrate drying technologies when designing a copper smelter, in Proceedings Metallurgical Plant Design and Operating Strategies 2006, pp 390-395 (The …
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What is Copper Concentrate?
What is Copper Concentrate? Although copper occurs naturally in a pure state, it's primarily mined from chalcopyrite, bornite, and malachite. Copper ore is extracted from the earth, then converted into copper concentrate, which is then roasted, smelted and converted into refined copper. The resultant metal is widely used for its high ...
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Method for drying copper sulfide concentrates
This invention relates to the drying of copper concentrates in a gas suspension or fluid bed dryer. In one aspect, this invention relates to a process for the drying of copper concentrate that is both energy efficient and that reduces the possibility of concentrate combustion in the dryer. ... However, at temperatures above 260° C. and in the ...
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Copper Mining and Processing: Processing Copper Ores
Copper processing is a complicated process that begins with mining of the ore (less than 1% copper) and ends with sheets of 99.99% pure copper called cathodes, which will ultimately be made into products for everyday use.The most common types of ore, copper oxide and copper sulfide, undergo two different processes, hydrometallurgy and …
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Improving copper matte grade control in a concentrate …
Revert T100 7 tph Powder T50 3 tph T40 D D 70 tph 80 tph FF Fig. 4. Schematic of feed materials to the furnace. Dry copper concentrate is mixed with a dosed amount of silica flux, in a 400 tons silo, discharging in a dosing system. ... This work will be done in the near future. The matte temperature control and the control of the magnetite ...
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CA2475833A1
1.- Procedure to prepare a colloidal mass containing soluble copper salts, obtained from the reaction of copper concentrates, to be subsequently washed in order to recover the copper in solution, CHARACTERIZED because: a.- the concentrate is simultaneously mixed with water, sodium chloride, and a solution of calcium chloride in …
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Indirect Drying of Copper Concentrate in a Rotating Coil …
equivalent to 41.34 tons per hour of dry concentrate. The initial and final moisture contents were 10.5% and 0.2% (wet weight basis), respectively. Simulation results (solid moisture …
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Drying Copper Concentrates
Copper producers gain several cost-saving advantages by employing a dryer for copper concentratesprior to the smelter. By the time they are ready to be smelted, copper … See more
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Drying, Roasting, and Calcining of Minerals | Request PDF
Jan 2015. Drying, Roasting, and Calcining of Minerals. pp.3-10. Research was performed to evaluate copper and silver extraction from samples of bornite flotation concentrate. Sulfation roasting ...
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Method for drying copper sulfide concentrates
FIG. 4 depicts a method for safely drying copper sulfide concentrates in gas suspension or fluid bed dryers in which the inlet gas temperatures of the dryer are above the ignition point of the copper concentrate. In the depicted embodiment the possibility of concentrate combustion is essentially eliminated by removing the oxygen …
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Processing of Complex Materials in the Copper Industry
A global copper mine-by-mine review undertaken by ICSG found that the global average copper ore grade was as low as 0.45% copper in reported reserves and only 0.65% copper in 2015 copper mine production. Global weighted average of copper concentrate output in a large sample of plants was around 25% copper in 2015 data.
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Indirect Drying of Copper Concentrate in a Rotating-Coil …
The Schlünder and Mollekopf [1] penetration model was used to simulate the drying of copper concentrate in a continuous indirect rotating-coil dryer located at a Chilean industrial copper smelter. The dryer consists of a 8.48 m long pan with a cylindrical bottom corresponding to an inner diameter of 2.77 m and a maximum depth of 1.66 m. …
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Copper Concentrates
The concentrates from different regions have approximately between 24% up to 36% of copper. Copper concentrates are then submitted to a final filtration and drying process to decrease the humidity to 8-9%. Production Process Mainly copper goes through different stages and degrees of refinement, to a lesser extent the byproducts such as ...
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Copper processing
Copper processing - Roasting, Smelting, Converting: Once a concentrate has been produced containing copper and other metals of value (such as gold and silver), the next step is to remove impurity elements. In older processes the concentrate, containing between 5 and 10 percent water, is first roasted in a cylindrical, refractory-lined furnace of …
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Effect of Air Temperature on Copper Concentrate
Northgate Patino Mines produces a copper concentrate assaying 22% Cu. Moisture content of the product averages 12. 5% H//2O when dewatering with conventional vacuum disk filters.
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Medium-temperature pressure leaching of copper concentrates …
Freeport-McMoRan Copper & Gold Inc. developed pressure leaching process for copper sulphide concentrate and the process was implemented in commercial scale in 2008 in Morenci plant for production ...
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Beginners guide to concentrate filtration
By example a typical copper concentrate may have a TML of 9% moisture. Given that at the incompressible limit the cake will have a solids fraction of about 50% v/v and for solids with an sg of 4.3 the moisture would be 18.9% w/w without gas displacement. ... Drying Once the filters enter the drying phase the variables are pressure and time ...
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Indirect Drying of Copper Concentrate in a Rotating …
The initial and final moisture contents were 10.5% and 0.2% (wet weight basis), respectively. Simulation results (solid moisture content and temperature profiles, …
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Drying Foods | Home & Garden Information Center
When the food is ready for use, the water is added back, and the food returns to its original shape. Foods can be dried in the sun, in an oven, or in a food dehydrator by using the right combination of warm temperatures, low humidity, and air current. The optimum temperature for drying food is 140 °F.
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Effect of Pretreatment on a Copper Concentrate with High …
In both studies, a copper extraction difference of 4.0% to 5.0% was achieved by conducting a pretreatment on the sample. This document evaluates the effects of sulfuric acid, sodium chloride, curing time, and temperature in the pretreatment of a copper concentrate with a high arsenic content prior to leaching.
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