Blogs
VertiMill Sizing Example
Table of ContentsModes of OperationApplications of the Vertimill This was a case study for an expansion of a 2200 TPD SAG Mill operation. The client wanted to increase the plant to 2700 TPD @ 30um. Some plant samples were taken, work indexes obtained and data simulated. As it turns out a single 3000HP Vertimill would get that done. The applications of the
Free Milling Gold Ores
Many problems on free milling gold ores have been solved by the 911MPE Testing Laboratory. One free milling gold ore received for testing the application of the Mineral Jig in the Ball Mill Classifier circuit gave the following results: Head Ore, 0.65 oz. Gold per ton (Assayed) 0.643 oz. Gold per ton (Calculated) Amalgam from Amalgamation of Jig Concentrate: 0.471 oz.
PGM Ore Processing
The concept of project value tracking and its application in project planning at Anglo Platinum Flotation process optimization through frequent in-line grade measurement as an alternative to sampling surveys that deliver outdated results Case studies of simultaneous mining and mineral processing optimization applied to platinum and nickel operations Optimizing concentrate allocation to Anglo Platinum smelters Water atomization of PGM-containing intermediate
Better Agitation for Better Recovery
A laboratory trial to first prove the concept was followed by full scale plant trials to prove the efficacy of the design compared to a current market leader rotor/stator supplier. LABORATORY TRIAL The laboratory trial was carried out at the AMML laboratory in Gosford by Graeme Sheldon on a copper ore from Queensland. This trial was purely to establish if the design
How to Prevent Crusher Choking
We all understand how choke feeding a crusher makes for good operation and product size but operators need to also know How to Prevent and avoid that same Crusher from Choking. It is apparent that although the distance between successive horizontal planes increases gradually as these planes move downward (due to increased throw of the head), the areas, and hence
Ball Mill Liner Design
Table of ContentsOptimize Ball Mill Liner ReplacementLorain Shell LinersMill HEAD LINERSMill LINER BOLTSEffect of Liner Design on Mill Performance There are many different designs and styles of ball mill liners. As with grinding balls local economics and ultimately operating costs determine the best design and material to use. The initial set of liners is rarely the final design selected. Based upon
Flux
Methods of Precipitate Refining FLUXES FOR METALLURGY Recovery of Precious and Secondary Metals from Electrolytic Copper Refining PRECIOUS METALS REFINING PRACTICE CALCULATING-DETERMINING SLAG DENSITY Flux SLAGS AND FLUXES IN PYROMETALLURGICAL PROCESSES
The Density of Liquids and Solids
Density data may be used for obtaining relationships between density, chemical composition, thermal and mechanical treatments of materials, etc. This circular defines density and specific gravity, describes 11 methods (hydrostatic weighing, pycnometer, flotation, hydrometer, falling drop, balanced column, Boyle’s law. electromagnetic, elastic helix, ice calorimeter, and volumetric) for determinations of the densities of solids and liquids, and indicates the accuracy
Cyanide Diffusion pH and Oxygen
Whether lime titrations or pH control is belter depends, I think, on the level of control. If the level was down around 0. 1 lb per ton of solution, titration is a bit difficult without a highly skilled man, which is not always available. Around a pH of 11 or 11.5, a pH meter is sensitive and it is easier
How to Become a Metallurgist
Table of ContentsYES! Become a Great METALLURGISTHow “Hard” is it to be a Good Metallurgist YES! Become a Great METALLURGIST Going from “Being”, to Good, to GREAT! Some say it is a matter of doing certain things. Others say it is a matter of doing things in a certain way. Here a very detailed list of specific skills under the heading “Mineral
Flotation Cyanidation CIL Tailings
This simple process flowsheet allows for Flotation Cyanidation Tailings in cases where ore bodies at depth have become more refractory and dotation ahead of cyanidation would call for major and expensive mill alterations, the sulphide minerals containing the undissolved precious metals can be recovered by flotation and shipped to the smelter. In some cases it is possible to make a
Mineral Processing Articles
Removal of Bi(III) and Zn (II) by nonliving Streptomyces rimosus biomass from nitric solutions Removal of chromium(VI) ions from synthetic solutions by the fungus penicillium canescens Removal of iron-cyanide complexes using micellar-enhanced ultrafiltration Removal of limestone from bauxite by magnetic separation Removal of radioactive elements from niobium and tantalum ores Role of Microorganisms in Mining Generation of Acid Rock Drainage
Crushing in Mineral Processing
In mineral processing or metallurgy, the first stage of comminution is crushing. Depending of the type of rock (geometallurgy) to be crushed, there are 2 largely different techniques at your disposition for crushing rocks. In principle, compression crushing is used on hard and abrasive rocks by placing them between a high wear-resistant plate/surface. Less abrasive and softer rocks or stones
Mineral Processing Engineering
Unless you are only doing civil works, there generally can’t be Mining Engineering without Mineral Processing Engineering for the majority of hard-rock ores we mine needs further processing before the metal it contains can be used as it is how minerals extracted from ores. Most valuable rocks go thru multiple steps of process-operations starting with comminution to complete beneficiation. Several
Effect of Oxygen on Gold Leaching
In simplified terms, the Effect of Oxygen on Gold Leaching can be summarized in saying: The dissolution rate of gold in alkaline cyanide solutions under atmospheric conditions, and at practical cyanide levels, is directly proportional to the dissolved oxygen concentration. The rate of dissolution of gold in alkaline cyanide solution is dependent on a number of factors, principally the solution composition
Jaw Crusher with “Multi Jaws” for Fine Crushing
The Bakstad’s Patented Multiple Jaws, is a Jaw Crusher that represents the first real advance made in increasing the crushing range of jaw crushers since their introduction. This Is the only crusher designed to give you a primary and two secondary crushers in one unit. Crushers of the jaw principle type have conclusively demonstrated their superiority over other type crushers through fifty years
Primary Crusher Selection & Design
How you select your primary crusher will be based on factors like moisture content, maximum rock lump size, material density SG, abrasion index, degradability and it being prone to dusting or not. The crusher capacities given by manufacturers are typically in tons of 2,000 lbs. and are based on crushing limestone weighing loose about 2,700 lbs. per yard3 and having a