Johan Mc Alpine
Summary
Experienced Director skilled in overseeing all aspects of production. Strong project management and decision-making abilities. Comprehensive knowledge of gold production. Proficient in writing, planning, and technical operations. Expertise in coordinating production plans and efficiently allocating personnel resources to meet tight deadlines.
Dynamic Director oversees every facet of production with strong project management and decision-making skills. Brings comprehensive knowledge of gold production, planning, and technical operations. Skilled at coordinating production plans and personnel resources to complete work under tight deadlines.
Overview
29
29
years of professional experience
Work History
Director
Metrec Pty Ltd
11.2001 - 01.2012
- Involved with the construction and commissioning of the following: Fluidized bed furnace (C.S.I.R) design, Ball mill operation, Gravity concentration plant (Knelson), C.I.P, Elusion and Electro winning plant, Smelthoue and Gold refinery operations.
- Have been involved with, and obtained experience in, the marketing and securing of raw materials.
- Also involved with the day to day running of the plant.
- Sourcing new business opportunities as well as 50% stakes in new business ventures.
Member
Edel Metal Recovery and Exploration
06.1994 - 11.1999
- Extraction of precious metals from organic waste obtained from various mines.
- Obtained valuable experience in the design, commissioning and operating of fluidized bed furnace, the recovery of gold from calcine sand, grease, fine carbon, elution and electro winning, and smelting of bullion.
- Also obtained experience in finance and Administration experience of the business.
Process Metallurgist
RANDFONTEIN ESTATE GOLD MINE
08.1992 - 06.1994
- Doornkop Gold Plant – Technical/ Production capacity, reporting to Plant Superintendent.
- Become experienced in Plant Management including Industrial Relations, problem solving, etc
- Acting as Senior metallurgist.
Plant Metallurgist
RANDFONTEIN ESTATE GOLD MINE
05.1991 - 07.1992
- Uprate of Millsite Plant to 260 000 tons per Month (JCI) Head Office.Various other technical tasks
- Conversion and commissioning of R.O.M ballmills to al sand treatment plant.
- Various other technical tasks.
Laboratory Manager
Metprotech (Anglo Vaal)
11.1988 - 04.1991
- Supervision and control of laboratory, Pilot plant activities and personnel, including: Samples preparation, blending, sub- sampling for assay, mineralogy and particles size analysis
- Crushing and milling.
- Ultra- fine milling in laboratory and pilot scale mills.
- Materials tested were gold bearing calcine, sulphate concentrates, zircon, limestone, pigments and metal powders.
- All relevant parameters such as torque, energy consumption, mass and fluid flows, and other relevant parameters were measured.
- The process calculations performs and presented in a report format.
- Particle size analysis.
-
- Gold leaching including quartzite, calcines, pyrite and other sulphate concentrates.
- The work often Included pre- treatment by aeration and oxidation.
- Reagent consumption an dissolved oxygen levels were measured.
- Carbon in pulp and Carbon in Leach test were also routinely performed, and diagnostic leaching was occasionally done.
- Commissioning and operation of the prototype Ultra- fine milling plant.
- Duties including operation of the plant, massflows, pulp density, sampling and reporting of results.
- General laboratory practices.
- Presentation of result and writing of reports.
Technician: Minerals Engineering Division.
Council for Mineral Technology (MINTEK)
Roodepoort
01.1983 - 10.1988
- Performance of Laboratory and pilot plant Work, including froth flotation, milling, leaching and gravity concentration.
- Test work for the Shashe Gold Mine Phelps Dodge, Botswana.
- Test work for Barbrook Gold Mine, Rand Mines, South Africa.
- This work was of similar Nature as the Shashe Project, but also included Carbon in Leach test on the flotation tailing and calcine to overcome the pre- robbing nature of the ore.
- Test work (flotation and smelter) for the Crocodile River Platinum Mine, South Africa
- The project consists of batch and pilot plant flowsheet development to maximize the PGM recovery.
- Ultra – fine milling, the development of the Stirred Ball mill.
Education
Matriculation -
Roodepoort High School
Roodepoort 01.2025 - 01.2025
National Diploma - Extraction Metallurgy
Technicon Witwatersrand
Roodepoort 01.1983 - 1986.01
Higher National Diploma - Extraction Metallurgy
Technicon Witwatersrand
Skills
Problem-solving
Operations management
Project management
Problem-solving
Contact Details
0828553046
Contact Address
19 Spantou Street, Roodekrans, Roodepoort, 1725
Personal Information
- Date of Birth: 05/03/62
- Nationality: South Africa
Awards
Achievement Award, Council for Mineral Technology (Mintek), For work performance on the Crocodile River Platinum Mine Project
Accomplishments
- Mintek achievement award.
Affiliations
- Member of the M.M.M.A
Timeline
Matriculation -
Roodepoort High School
01.2025 - 01.2025
Director
Metrec Pty Ltd
11.2001 - 01.2012
Member
Edel Metal Recovery and Exploration
06.1994 - 11.1999
Process Metallurgist
RANDFONTEIN ESTATE GOLD MINE
08.1992 - 06.1994
Plant Metallurgist
RANDFONTEIN ESTATE GOLD MINE
05.1991 - 07.1992
Laboratory Manager
Metprotech (Anglo Vaal)
11.1988 - 04.1991
Technician: Minerals Engineering Division.
Council for Mineral Technology (MINTEK)
01.1983 - 10.1988
National Diploma - Extraction Metallurgy
Technicon Witwatersrand
01.1983 - 1986.01
Higher National Diploma - Extraction Metallurgy
Technicon Witwatersrand
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