pressure oxidation autoclave

Design and commissioning of the sepon copper pressure ...

The pressure oxidation autoclave is designed to treat a proportion. ... DESIGN AND COMMISSIONING OF THE SEPON COPPER PRESSURE OXIDATION CIRCUIT. Concentrate grade - Sulfur % 48 - …

Pressure Oxidation Gold Circuits: Basic Ferric Arsenate ...

Pressure Oxidation Gold Circuits: Basic Ferric Arsenate Sulfate and Basic Ferric Sulfate Behaviour in Downstream Processing ... in the feed precipitates during autoclave oxidation and is fixed in ...

Autoclave (industrial) - Wikipedia

An autoclave applies both heat and pressure to the workload placed inside of it. Typically, there are two classes of autoclave. Those pressurized with steam process workloads which can withstand exposure to water, while circulating heated gas provides greater flexibility and control of the heating atmosphere.. Processing by autoclave is far more costly than oven heating and is therefore ...

PRESSURE OXIDATION OF REFRACTORY GOLD ORES: THE …

Pressure Oxidation Pressure oxidation is employed to liberate gold and silver in refractory sulfide concentrates often and ores. The main pressure oxidation products from iron sulfide minerals are sulfuric acid (and metal sulfates) and hematite. Depending on the conditions within the autoclave, acid containing iron compounds can be formed.

Iodide Pressure Oxidation Gold Leaching - Autoclave

Table of ContentsEffect of stirring speedEffect of temperatureEffect of partial pressure of oxygenEffect of potassium iodide concentrationEffect of pH of iodide solution The pressure oxidation process is especially suitable for the sulfide type of refractory ores. It includes two stages of operation. First, the refractory ore is subjected to an autoclave oxidation.

Types of Pressure Oxidation Autoclave Lining

Types of Pressure Oxidation Autoclave Lining. Previous Next. As shown in Figure 1, there are other accessory vessels (splash and flash towers) in the autoclave circuits, that are also brickwork lined. The linings used to date, other than small test sections, have all been acid-resistant fireclay bricks, bonded with alkali silicate mortar, PbO ...

AutoclaveTechnology- Applications for Sulphide ...

The"Autoclave". •Strong walls-pressure vessel •Maximum pressure controlled (or else dangerous!) •Batch and continuous reactors need a pressure ... • Refractory gold full pressure oxidation • Kidd Zinc pressure leach • ChambishiMetals cobalt mattealloy leach • Outotec DON process. 17

PRESSURE OXIDATION OF PYRITE-ARSENOPYRITE …

Pressure oxidation of pyrite-arsenopyrite refractory gold concentrate 103 Autoclave oxidation tests were conducted in Büchi ecoclave model 075 titanium autoclave. The total volume of the autoclave vessel was about 1.1 dm3 and it was equipped with magnetic agitation unit, gas inlet and outlet, and sampling system with

Pressure Oxidation Leaching Process - 911metallurgist.com

Batch Autoclave Laboratory Procedures: The vessel used for the laboratory pressure oxidation process was a two-liter Parr titanium autoclave with dual impellers. It was heated and cooled externally and was pressurized with commercial-grade oxygen. A positive bleed of offgas was maintained in each test; the rate was measured in the offgas after the steam was removed with a condenser and desiccant.

Autoclave and Pressure Oxidation - SPX FLOW

Autoclave and Pressure Oxidation Pressure oxidation was developed for processing refractory ores where gold is occluded in the sulfide minerals, typically pyrite or arsenopyrite. Oxidation of the sulfides at elevated temperatures and pressures liberates the gold, allowing it to be economically recovered by conventional circuits.

First Quantum Minerals Provides an Update and Scoping ...

The concentrate is oxidised utilising two autoclaves and copper is recovered from the autoclave effluent via the existing and expanded SX/EW circuits at Kansanshi. The HPL process results in near total oxidation of the copper sulphide concentrate converting the …

In-situ Adsorption of Gold(III) Chloride on Activated ...

In-situ Adsorption of Gold(III) Chloride on Activated Carbon Under Pressure Oxidation-Leaching Conditions Jean-Christophe Parisien-La Salle Department of Mining and Materials Engineering

Autoclave Standard Operating Procedure - NDSU

• Run the autoclave at a chamber temperature of 121°C for 60 minutes*, using a dry cycle run. *121°C is a standard temperature for autoclave operation, and generally achieved when chamber pressure is 15-16 psi. However, this pressure is dependent upon altitude. At higher altitudes, the pressure must be increased to achieve 121°C.

Pressure Oxidation | Mining | SGS

Pressure oxidation (POX), high pressure oxidation (HiPOX) and ACTIVOX autoclave leaching are viable industry-standard technologies used to recover gold and other accessory metals. The process is particularly well suited for treating refractory gold ores, which …

Pressure Oxidation Autoclaves | Pressure Autoclaves ...

Eaton Metal Products is the premier North American fabricator of pressure oxidation Autoclaves! With lift capacity at 550 tons, we handle these very large, extremely heavy vessels with ease. Our expertise with the specialty alloys, typically required in these vessels, has proven an invaluable asset to our extensive & ever expanding customer base.

Titanium Internals in Refractory Lined Pressure Oxidation ...

Titanium Internals in Refractory Lined Pressure Oxidation Autoclaves Author: Franceschini, M Author: Ugarenko, C Hatch Ltd. - Autoclave Technology, Sr. Piping Engineer Hatch Ltd. - Autoclave Technology, Welding Technologist Co-Author: Gothard, S W.E. Smith Engineering Pry. Ltd., General Manager 4 Bending the 10 mm Titanium Gr. 2 to a 50 mm

Autoclave | MOGAS

Valves for Pressure Oxidation (POx) The Pressure Oxidized (POx) autoclave circuit is a hydrometallurgical process that recovers minerals from sulphide ores by injecting oxygen into slurry in an autoclave vessel. Operating at high pressures and temperatures, …

Pressure Oxidation - calderaengineering.com

Overview. Pressure Oxidation (POX) is a process used to extract gold, copper, zinc, molybdenum, and uranium from refractory ore bodies. The POX process utilizes elevated temperatures (roughly 230 degrees Celsius), elevated pressures (roughly 35 bar or 510 psi), and oxygen to liberate the minerals from refractory ores.

Pressure Oxidation Process - Outotec

The key equipment of the pressure oxidation process is the autoclave, equipped with Outotec's mixing technology, to enable efficient use of oxygen. All main and auxiliary equipment, from the autoclave feed to flash tanks, is included in the autoclave train package.

Stabilization of supersonic vent gas from autoclave ...

STABILIZATION OF SUPERSONIC VENT GAS FROM AUTOCLAVE PRESSURE OXIDATION 79 Introduction This paper presents the results of computational fluid dynamics (CFD) and finite element analyses (FEA) in the design of a novel blast shroud configuration using a perforated plate, as it applies to pressure letdown of vent gas from a pressure oxidation process.

Basic Iron Sulphate in Pressure Oxidation Processing

Typical autoclave operating conditions for a refractory gold process are a . temperature of 190 to 230OC, and an oxygen over-pressure of 350 to 700 kPa (50 to 100 psi). The oxidation of sulphides are strongly exothermic reactions, and the pulp density of the feed to the autoclave is calculated based on the sulphide concentration in such a

pressure oxidation autoclave - alibaba.com

Alibaba.com offers 918 pressure oxidation autoclave products. About 92% of these are sterilization equipments. A wide variety of pressure oxidation autoclave options are available to you, such as pressure steam sterilization equipments, gas sterilization equipments, and boiling sterilization apparatus.

US6818191B2 - Autoclave control mechanisms for pressure ...

The process chemistry during the oxidation of molybdenite concentrates in an oxygen pressure leach can be controlled by regulating the amount of ferric iron and excess sulfuric acid recycled as autoclave discharge slurry or filtrate to the autoclave feed. A computer model capable of predicting the concentration of soluble molybdenum in the autoclave discharge and based on the concentrate and ...

High Pressure Acid Leach & Pressure Oxidation

oxidation reaction would generate sufficient heat for the oxidation reaction to proceed to completion. Non-acidic pressure oxidation techniques such as alkaline pressure oxidation use similar conditions of temperature, pressure and oxygen to acidic route but the process is …

Valves for autoclaves – pressure oxidation ( POX)

2911/3/2 Valves for autoclaves – pressure oxidation (POX ) 2 APPLICATION REPORT 9/18 Process applications Autoclave POX operation includes several different types of valves, such as slurry feed and discharge, pump isolation, depressurization, steam supply and

What is PRESSURE OXIDATION? What does PRESSURE ... - YouTube

Aug 21, 2017· A disadvantage of pressure oxidation is that any silver in the feed material will often react to form silver jarosite inside the autoclave, making it difficult and expensive to recover the silver.

Pressure oxidation - Wikipedia

The pressure oxidation process is used to prepare such ores for conventional gold extraction processes such as cyanidation. It is performed in an autoclave at high pressure and temperature, where high-purity oxygen mixes with a slurry of ore.

WO2015086909A1 - Autoclave for pressure oxidation - Google ...

The present invention relates to TiN coated autoclaves for pressure oxidation of slurried ores and concentrates and provides an autoclave for pressure oxidation of slurried ores and/or concentrates comprising a main shell having an interior layer composed of titanium or titanium alloy having a TiN layer on its surface, the TiN layer coming into contact with the slurried ores/or concentrates ...

Pressure Oxidation Overview - ScienceDirect

Pressure oxidation refers to the oxidation of sulfides, such as pyrite [FeS 2] and marcasite [FeS 2], at elevated temperature and pressure. Oxidation releases encapsulated gold grains from the sulfides and makes the oxidation residue of the ore or concentrate more amenable for gold recovery by cyanidation in a subsequent leaching step.

GOLD AUTOCLAVE FUNDAMENTALS - tahija13

At Lone Tree, nitrogen gas flotation is used to minimize oxidation of arsenian pyrite during flotation. Straight cyanidation of gold-bearing pyrite usually results in poor recoveries so a pre-cyanide oxidation step is used. Roasting and high-temperature, high-pressure oxidation in an autoclave are the two two main methods used.

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