Blog of Mineral Processing (Metallurgy) Articles

Mineral Processing and Extractive Metallurgy Methods

A successful search for and development of a new mineral deposit rests not only in its discovery but also in economical processing of the ore. Via the Science of its engineering, Mineral Processing and Extractive Metallurgy allows the evaluation of metal recovery Methods laid-out or expressed as a process flowsheet.

The challenge of discovery and

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By | 2017-03-31T09:57:37+00:00 April 14th, 2016|Categories: Concentrator Manuals/Procedures, Flowsheets & Flowcharts|Comments Off on Mineral Processing and Extractive Metallurgy Methods

Mineral Processing Flowsheets

The Mineral Processing Flowsheets shown on the following pages are based on actual data obtained from successful operating plants. Metallurgical data are shown in these flowsheets which incorporate Crushers, Grinding Mills, Flotation Machines, Unit Flotation Cells, and Selective Mineral Jigs as well as other standard milling equipment.

The Flotation

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By | 2018-05-15T20:34:53+00:00 March 8th, 2016|Categories: Flowsheets & Flowcharts|Tags: , , |Comments Off on Mineral Processing Flowsheets

Kaolin Ceramics

clay-minerals magnetic separator

Kaolin is a clay comprised essentially of the mineral kaolinite which has the oxide composition of 46.3% SiO2, 39.8% Al2O3, and 13.9% combined H2O. The structural formula of kaolinite is (OH)8Si4Al4O10. These deposits are sedimentary and contain approximately 90% or more kaolinite along with minor quantities of quartz, mica, and smectite along

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By | 2018-05-01T14:36:33+00:00 May 1st, 2018|Categories: Various|Comments Off on Kaolin Ceramics

How to Derate a Pump Curve for Slurry Pumping

The pump curves published by pump manufacturers are for the performance of the pump on water. Some pump manufacturers use a derating factor to correct the head and efficiency of the pump when pumping slurry.

This a subject which has had a lot of controversy and disagreement It is suggested that the method used be left to the manufacturer The method

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By | 2018-05-01T12:24:53+00:00 May 1st, 2018|Categories: Pumps and Pumping|Comments Off on How to Derate a Pump Curve for Slurry Pumping

Silver Chloride Chemistry

To appreciate the development of industrial silver chloride processing it is helpful to outline some of its general properties. Since more comprehensive reviews are available, only basic concepts will be covered here.

Silver chloride is a white, curdy, crystalline solid compound. In the lab, it is prepared from a solution of AgNO3 by precipitation

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By | 2018-04-29T15:07:24+00:00 April 29th, 2018|Categories: Various|Comments Off on Silver Chloride Chemistry

Effect of Air Flowrate on Flotation Column

On a flotation column cell, the variation of concentrate flowrate, clean coal yield and product grade with air flow rate are shown in Figure 4. These tests were carried out using a 5 wt. % feed slurry. The results show that the concentrate flow rate, yield and product ash content increased with air flow rate. This trend is expected since the available

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By | 2018-04-29T12:08:15+00:00 April 29th, 2018|Categories: Various|Comments Off on Effect of Air Flowrate on Flotation Column

Visman’ General Sampling Theory

A comprehensive analysis of the entire range of related studies would require a lengthy discussion. Instead, this paper will focus only on the work of Visman (1962, 1969), because his work is part of the current ASTM D2234 standard on coal sampling (American Society for Testing and Materials,

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By | 2018-05-22T01:34:22+00:00 April 28th, 2018|Categories: Various|Comments Off on Visman’ General Sampling Theory

How to Reduce Ball Mill Overload Risk

Two different circumstances must be addressed for the reduction or elimination of overload risk: a) in existing operations, or b) in the design of new grinding circuits. The methods necessary are in the first case an adjustment of operating conditions; and in the second an adjustment of mill shapes.

Existing Operations: from Equation

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By | 2018-04-24T12:47:48+00:00 April 24th, 2018|Categories: Grinding|Comments Off on How to Reduce Ball Mill Overload Risk

Column Flotation BIAS

Counter Current flow of mineralized bubbles & wash water

The column underflow is always of slightly higher volume than the feed. This volume imbalance, called BIAS in the control system, is made up by wash water inserted at the top of the column. Part of this wash water travels down the column to exit with the underflow. The remainder overflows with the loaded bubbles.

It is this unique application of wash

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By | 2018-04-24T15:34:19+00:00 April 23rd, 2018|Categories: Various|Comments Off on Column Flotation BIAS

Gold Refining Contract

The operator’s relationship with the refinery depends entirely upon a well-defined written contract, good representation at the refinery and the use of reliable assay laboratories. While all contracts are similar in that they are meant to safeguard the interest of both refiner and miner, it is not unusual to find a single refinery writing a

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By | 2018-04-23T17:45:59+00:00 April 23rd, 2018|Categories: Various|Comments Off on Gold Refining Contract

Gallium Uses

Gallium: Cominco has been at the interface between the semiconductor materials and the components industries since the commercialization of the transistor in the early fifties. Based on our commitment to R&D, we have become the largest merchant supplier of several specialty semiconductor substrates

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By | 2018-04-23T16:51:23+00:00 April 23rd, 2018|Categories: Various|Comments Off on Gallium Uses

Ball Mill Circuit Classification System Efficiency

Fines may be defined as any material smaller than a specified product size, and “coarse” as any material that is larger. The target 80 percent passing size of the grinding circuit product is a convenient reference point, as it is often used to express the grind size objective. This size is close to the modal value of typical size distributions

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By | 2018-04-22T18:23:14+00:00 April 22nd, 2018|Categories: Grinding|Comments Off on Ball Mill Circuit Classification System Efficiency

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