Blogs
Jaw Crusher Liner Plate Design & Profile Shapes
Straight Jaw Plates: A shows a diagram of a standard type of Blake crusher with regular or straight jaw plates. This type of plate has been the standard from the time of its inception, emulating, in this respect, the straight concaves in the gyratory machine. And it will be noted that the theoretical action in this straight-plate jaw chamber follows quite closely
THE BARRATT METHOD
Plants designed using The Barratt Method as published in the Book Mineral Processing Plant Design, Practice, and Control Proceedings, include: Alumbrera Batu Hijau Cadia (one consultant among others) Candelaria Clarabelle (Inco) Collahuasi (line 1 & 2) Dreifontein El Teniente SAG 1 Ernest Henry Esperanza Fimiston Freeport 95K expansion Lisheen Numerous benchmarking exercises to operating grinding circuits in mines are published
Effect Of Primary Grind Size On Mineral Liberation
The extrapolated ore fragmentation and copper sulphide liberation plots reveal that the liberation levels and hence the flotation responses of the minerals would be essentially constant across a broad range of flotation feed sizing. This observation would indicate that flotation feed sizing coarser than 200µm K80, the practical norm for copper porphyry ore processing worldwide, could be utilized as a
Fluorine Dispersion
In some cases, Mica carries Fluorine. If you can not pre-float that Mica, you may want to try the Fluorine Dispersant below. Product: Oxfloat 25P – Metaphosphate As a mining chemicals for flotation treatment of multi-metallic ores Preparation: Make 2% solution in water. Dissolves readily. Dosage for good dispersion: Dosage between 100 – 1000 g/t. Product: Oxfloat 138P – Metasilicate Product
MgO Talc Depression
Product: Oxfloat D100 is of the CMC family of depressant. With the purpose of MgO Depression, this is commonly used in Southern Africa for Talc depression in PGM/Nickel flotation circuits. Also known as SODIUM CARBOXYMETHYL CELLULOSE Preparation: Make 0.5% solution in water. Add product to water into stirred beaker to prevent lumping. Allow sufficient time to dissolve. Dosage: The application rate of
Rock Crushing Process in Mining
Table of ContentsRock Crusher TypesJaw CrusherGyratory CrushersImpact CrushersRoll CrushersCone Crushers Let’s follow a rock through a crushing cycle to see what variables will have to be controlled. First the rock will enter the crushing chamber and drop as far as the angle of the crushing surface will allow it to. The crusher “breaks it and the fine material produced will
Gyratory Crusher Operation
Crusher are used to reduce the ore in size, the purpose and the responsibility of the crusher operator is to operate that crusher in such a manner as to ensure that every possible ton is processed in the shortest period of time possible. This is accomplished by knowing and understanding all of the Gyratory Crusher Operating Variables that are inherent to
Crusher Lubrication System Operation & Maintenance
For easy of Operation & Maintenance, all Rock Crusher Lubrication System include their own monitoring devices, SIGHT GLASSES or VIEW PORTS in the reservoir for oil level, FLOW METERS in the oil lines and/ or VISUAL ACCESS to the discharge point of the oil circuit. This is to allow the operator to gauge the oil flow visually. And finally as
Gyratory Crusher Lubrication
The lubrication of Gyratory crushers may be one of the special problems that the Jaw crusher isn’t as readily exposed to. This crusher, because it may be loaded from two sides, often is used in an open pit situation where large ore carriers are dumping directly into the crusher. This means that the machinery is exposed to whatever climate it
Gyratory Crusher Components
The Gyratory Crusher is made up of six main components, Base, Main frame and concave liners, Drive assembly, Mantle, Spider arm assembly, Oil system. It is this eccentric bushing and bearing that gives the crusher its crushing action. To understand how it works it might help to learn the dictionary meaning of the word eccentric which is: Differing conspicuously in
Compare Gyratory Crusher vs Jaw Crusher
To accomplish this reduction in size takes several steps or stages of crushing and grinding. Primary crushing is the first of these stages. Generally speaking there are two types of primary crushers, lets compare them: GYRATORY CRUSHER or a JAW CRUSHER. Although they don’t look anything like they do have similarities that put them into the same class of crusher.
Conveyor Safety Talks
Let us talk about Basic conveyor safety as it is just like being around all moving equipment will be guards of one type or another. It may be to prevent people from falling into the equipment or, in cases where there is a danger of equipment failure, the guards may be designed to contain parts and pieces that may fly
Conveyor Belt Alignment Switch
The other switch I mentioned was a MISALIGNMENT switch. This is a manual swing arm that is placed beside the conveyor belt. If the belt should wander the arm will be struck pushing it out of position and shutting the conveyor down. In most mills the equipment is INTERLOCKED. This means that if one piece of equipment in the circuit should
Plugged Chute Detection Probe
A Plugged Chute Detection Probe is an emergency switch that will shut down the equipment should a transfer chute “become plugged. There are two common types of probes, a TILT SWITCH and a CONDUCTIVITY switch. A tilt switch hangs inside the chute. If the chute plugs, the ore will build up to the switch. The placement of the switch in
Belt Conveyor Weightometer – Electromagnet and Metal Detector
Belt Conveyor weightometers are required to accurately weight and chart the tonnage throughput. An operator is able to catch many problems that are developing simply by watching the tonnage. A drop or increase in tonnage can indicate something going wrong .within the system. MAGNETS, These capture what is known as “TRAMP METAL”. This is metal that has gotten into the ore
Transfer Chute Skirting
The transfer chute skirting is made from rubber and prevents rock from bouncing and rolling over the edge of the conveyor when it is loaded onto the belt. This skirt runs completely around the chute except for the discharge point at the front. As the skirt and the belt cannot have a lubrication put on them this is an area
Transfer Chute Liners
These liners have a high carbon content to give them the hardness required. This carbon makes welding these liners very difficult. For this reason the liners are bolted in place. As I mentioned earlier these bolts make excellent early warning indicators for worn-out liners. When the wear on the liner becomes great enough to wear the head of the bolt
Conveyor Transfer Chute
The first one to look at is a simple two belt conveyor system, the ore will come from a draw point. This could be a fine ore bin or a coarse ore stock pile. It is transported by the first conveyor to a transfer chute where it will be transferred to the second belt. The transfer chute has no moving
Effect of Grind Size on Gold Recovery
Your intuition along with common wisdom will have you believe the Effect of Grind Size on Gold Recovery is always uni-directional or proportional. Truth is it really depends on what your mineralogy tells you and what the effective gold grain liberation size is. If you are already finer than needed, going finer yet will not help. Here I present an examples
Diagnostic Gold Leach Testing
A Gold Diagnostic Leach Test is used to evaluate the distribution or deportment of gold in various minerals is determined by a series of selective leaches, usually by increasingly stronger oxidative acid leaches. Between each stage, cyanide leaching is used to extract the released gold. In this study a total of ten analysis stages were carried out for the 8 composite at a grind
Arsenopyrite Gold Recovery
Table of ContentsHow to Recover Gold from ArsenopyriteExperimental Procedure and ResultsPreliminary Cyanide LeachUpflow Percolation LeachCarbon Adsorption Treatment of Pregnant Cyanide SolutionCyanidation Carbon Adsorption Having some arsenopyrite in your gold ore sample does not insure a full refractory gold processes is needed for recovery. The presence of arsenopyrite and heavy sulphides just tells a component of fraction of the gold extraction process might
Gold in Arsenopyrite
As case study for the processing of an ore with a refractory component of visible and invisible Gold associated in and with Arsenopyrite had a gold content in the feed ranged from about 1.0 g/tonne to about 8.7 g/tonne depending on lithology. There was some difficulty in measuring the feed gold content due to the presence of coarse gold in the composites. The silver content ranged