k to Technical Papers

 

Challenges & Improvements in Milling at Omai Gold Mines

January 21st, 2002 Omai mine has undergone continuous improvements since its inception in 1993 as a 12,000 mtpd hard and soft rock SABC mill. Omai has experienced improved overall gravity recovery to over 40%, an availability in excess of 99%, a reduction in labour costs and more....Read more.

Effect of Various Variables on Gravity Gold Recovery in Grinding Circuits - Results from Mathematical Modeling (KC-ModPro)

December 4th, 2001 An interative model was developed to further understand the factors affecting gravity gold recovery (GRG) within a grinding circuit. Read more....

Avgold - Target Division - Post Audit on the Knelson Concentrator

November 2nd, 2001 The installation of the Knelson Concentrator (KC) proved to be successful with a resulted increase in overall plant recovery of 3%. Read more....

Goldcorp Inc. Red Lake Mine - Design & Commissioning

July 26th, 2001 A feasibility study was carried out in 1998 and it was determined that a new mill should be constructed with a throughput rate of 600 stpd. The life-of- mine average gold grade was projected to be 1.35 oz/t. Detailed engineering was started in early 1999 and the first gold was poured in August 2000. Read more....

Knelson CVD - Analysis of Operating Variables

July 25th, 2001 The Knelson CVD is a continuous centrifugal gravity concentrator for high-mass yield recovery applications. It has four operating variables that enable control of mass yield, product grade and recovery namely: fluidisation water, bowl speed, pinch valve open time and....Read more.

Continuous Concentrator Gains Industry Acceptance

June 18th, 2001 Batch to continuous; Knelson's latest breakthrough in enhanced gravity technology has gained industry acceptance. Read more....

Knelsons Recovery of Platinum Group Metals (PGMs)

April 9th, 2001 The unstable demand for base metals (copper, nickel and cobalt) has necessitated new technologies to be worked out to significantly increase the recovery of platinum-group metals (PGM) from ores of the Norilsk deposits....Read more.

Placer Gold Testing in Mongolia

February 9th, 2001 Bulk testing of the Toson Terrace placer gold deposit in the Zaamar Goldfield of Mongolia was carried out by Golden Tiger Corporation in 1996. The sampling methodology described in this technical paper is to calibrate the results of gold grade for....Read more.

Extreme Gravity

September 6th, 2000 The concept of Extreme Gravity is the latest in a series of innovations that has seen a re-introduction of gravity recovery systems....Read more.

Gravity Gold Recovery at President Steyn

August 3rd, 2000 Before the installation of KC’s, the daily (and even weekly) plant recoveries varied widely between 85 and 98%. Once the KC’s were installed, recovery numbers went up drastically and at one stage 114% was achieved....Read more.

Predicting Gravity Separation Gold Recoveries

May 12th, 2000 The abstract on this paper is a novel methodology that makes it possible to estimate the performance of a gravity circuit having a large gold circulating load and....Read more.

Eureka Mine - Development & Implementation of a Novel Gravity/Heap Leach Process

May 11th, 2000 A paper discussing Eureka's Geology & Mining, Preliminary Testwork, Final Testwork, Process Flowsheet and Plant Performance. Read more....

The Upgrading of Primary Gold Gravity Concentrates

April 28th, 2000 This paper reviews flowsheets generally used in gold rooms to upgrade primary gravity concentrates particularly those of Knelsons. Read more....

Testing Requirements & Insight for Gravity Gold Circuit Design

April 21st, 2000 This presentation examines why typical scoping work fails to address gravity recovery adequately and shows how a standard test to characterize gravity recoverable gold (GRG) can provide the missing data. Case studies are presented and used to illustrate the concepts of....Read more.

A Standardized Test to Determine Gravity Recoverable Gold

April 18th, 2000 A test to determine the amount of gravity recoverable gold (GRG) in an ore is described. Typical GRG results are given; possible uses and typical diagnostics are presented. The test has been applied to....Read more.

Ten Do's & Don'ts of Gold Gravity Recovery

April 12th, 2000 The ten guiding principles in the design and operation of gold gravity circuits are presented: economic impact, applied mineralogy, gold’s behavior in grinding circuits, alternate recovery....Read more.

Gold Gravity Recovery At The Mill Of Les Mines Camchib Inc.

February 4th, 2000 This paper provides a detailed analysis of the gravity circuit at Les Mines Camchib in Chibougamau, Que. Read more.

Development And Economic Application Of Knelson Concentrators In Low Grade Alluvial Gold Deposits

January 3rd, 2000 This paper offers two very interesting perspectives; the first being that of the inventor of the Knelson Concentrator; Byron Knelson and the second is that of an end user; Ron Edwards of Metana Minerals. Read more....

The Behaviour of Gold In Hemlo Mine Ltd. Grinding Circuit

December 12th, 1999 This paper compares the behaviour of gold and ore in the grinding circuit of Hemlo Mines Ltd.; Golden Giant Mine in North Central Ontario. Read more....

Gravity Concentration Of Gold From Base Metal Flotation Mills

November 20th, 1999 The Noranda Technology Centre, in cooperation with Noranda's milling operations, has been investigating the potential of gravity concentration of gold from base metal flotation mills. Read more....

Process Advances At Lac Minerals Ltd. Est Malartic Division

October 2nd, 1999 This paper discusses the treatment of a massive sulphide, copper/gold ore from the Bousquet 2 Mine at the Est Malartic Mill to produce a gravity gold product, a copper flotation concentrate and a gold precipitate. Read more....

Societe Des Mines Du Bourneix

September 14th, 1999 This single page report summarizes the installation of a fully automated 20" Knelson CD Concentrator in this 70,000oz./year gold mine in Southern France. Read more....

"A New Generation Of Knelson Concentrators" A Totally Secure System Goes On Line

July 18th, 1999 This paper briefly outlines some of the traditional gravity concentrating devices commonly utilized in precious metal recovery systems. Read more....

Recovery Of Gold Using Gravity Concentration - The Hemlo Experience

April 3rd, 1999 The installation of a gravity concentration circuit at the Golden Giant Mine has resulted in some surprising results. Read more....

Recovery Of Placer Gold Using The Knelson Concentrator

March 19th, 1999 The recovery of alluvial gold was studied using 3 and 7.5 inch Knelson Concentrators applied to four kinds of sands coming from Bajo Cauca and El Bagre, Antioquia, Colombia. Gold recoveries of over 98-99% were obtained from the three-stage tests under the following operating conditions: pulp dilution, 3:1; particle size range, -10+20, -20+65 and -65 Tyler mesh; and a water pressure of 3 to 5 psi with an average of 4 psi. Read more....

Gravity Separation Development At Boddington Gold Mine

January 23rd, 1999 The Supergene/Basement Plant was constructed in 1990 and commissioned in early 1991. It was designed to process both copper-gold-silver anomalies within the laterite gold orebody and future hard rock ores. Read more....

Gravity Concentration at W.M.C.'s ST.IVES Gold Mines

December 17th, 1998 St. Ives Gold Plant is located near Kambalda, approximately 90 kilometers south of Kalgoorlie in Western Australia. Read more....

The Effect of The Installation of a Knelson Concentrator on Gold Recovery at Freda Rebecca

November 9th, 1998 The Freda Rebecca Gold Mine is situated near Bindura in Zimbabwe and processes some 100,000 tonnes of gold-bearing ore per month. A laboratory test programme was undertaken to quantify the deportment of the gold in the residue. The test programme included mineralogical studies, diagnostic leaching, gravity concentration and cyanidation. The results indicated that cyanide-soluble gold was present in the residue. Read more....

The Knelson Concentrator: Application and Operation at Rosebery

October 22nd, 1998 Rosebery has a long history as a base metals sulphide mine. Copper, lead and zinc concentrates are produced for sale. Silver values have always been high in the lead concentrate, while gold has historically been seen as a bonus in both the copper and lead concentrates. Read more....

Gravity Concentration at The Telfer and New Celebration Gold Mines

September 2nd, 1998 When the Telfer mine first started in the early 80's a gravity circuit was incorporated. This helped reduce gold inventory in traps, reduced solution losses and reduced metal load in the Merrill Crowe circuit. Read more....

Gravity Concentrations at Montana Tunnels

August 14th, 1998 The gravity circuit at Montana Tunnels has undergone many changes since its production startup in July of 1991. After initial positive test work, a manual Knelson 30 inch concentrator was installed and soon thereafter the circuit was modified with the addition of another KC-MD30. Read more....

Gravity Concentration at Campbell Mine

July 21st, 1998 The Campbell Mine is located on the north shore of Red Lake in North Western Ontario. This underground mine has operated continuously since 1949 and produced over 300,000 oz of gold each year from 1994 to 1996. Read more....

Back to Technical Papers