What is Amira P754?
The primary objective of the AMIRA P754 project, ‘Metal Accounting and Reconciliation’, was to improve the auditability and transparency of Metal Accounting from mine to product and thus to assist in good corporate governance.
What is metal accounting?
Metal accounting is the estimation of (saleable) metal in a mine and subsequent process streams over a defined time period. Metal accounting research is ‘themed’ into measurement network design and accounting for multiple ores sources.
What is the AMIRA P754 code?
The AMIRA P754 code of practice for metal accounting defines metal accounting best practices. What metal accounting is all about? Metal accounting has to manage the uncertainty inherent to the measurement process generating financial risk.
What is mass pull?
Mass pull, or the flowrate of solids reporting to the concentrate, is affected by changes in froth structure and stability which are in turn affected by changes in operating parameters such as air flowrate and froth depth.
How do you calculate recovery in mineral processing?
Recovery %
- R = 100 c(f — t)/f (c — t) = recovery %
- By K plus assays f and c.
- R = 100 c/Kf = recovery %
- By weights F and C, plus assays c and t.
- R = 100 Cc / (Cc+t(F—C)) = recovery %
How do you calculate recovery from flotation?
(b) % Metal Recovery, or percentage of the metal in the original feed that is recovered in the concentrate. This can be calculated using weights and assays, as (Cc)/(Ff)·100. Or, since C/F = (f – t)/(c – t), the % Metal Recovery can be calculated from assays alone using 100(c/f)(f – t)/(c – t).
What is grade and recovery?
The theoretical grade-recovery curve for an ore is a definition of the maximum expected recovery by flotation of a mineral or element at a given grade. This is defined by the surface area liberation of the value minerals and is consequently directly related to the grind size utilised in the process.
What is percentage metal recovery?
Represents the ratio of the weight of metal or mineral value recovered in the concentrate to 100% of the same constituent in the heads or feed to the process, expressed as a percentage.
How do you calculate metal recovery?
How does credit recovery affect GPA?
Does credit recovery affect college? As credit recovery programs do not affect GPA, they also have no negative impact on the college.
What is the Amira code of practice for metal accounting?
Metal accounting estimates the quantity of saleable metals produced over a defined period of time (Morrison, 2008a). The AMIRA P754 code of practice for metal accounting defines metal accounting best practices. What metal accounting is all about? What are the challenges?
When was the Amira p754 code of practice created?
The AMIRA P754 project was launched in 2004 and as described by Morrison and Gaylard (2008) the main aim of the project was to develop a code of practice for metal accounting with the following key objectives:
Is the Amira code linked to the software?
The application of the AMIRA code is not only linked to the use of given software whatever qualities it may get or functionalities it may provide. The software package will facilitate to reach the code recommendation but is not sufficient.
What are the principles of metal accounting code?
1. The metal accounting system must be based on accurate measurements of mass and metal content. It must be based on a full Check in-Check out system using the Best Practices as defined in this Code, to produce an on-going metal/commodity balance for the operation.