Where large samples (both in top size and weight) have to be examined it is not practical to use heavy liquids (being both expensive and time consuming). A laboratory heavy media separator may be used which simulates the action of a heavy liquid bath. Here is a schematically shows an Ericsson cone separator. Sized fractions of … Read more
The three types of curve described so far completely define the behaviour of the material in a heavy liquid under ideal sink-float conditions. In practice, we wish to use the data to predict the performance of a commercial process such as D.M.S., Jigs, Tables, etc. In these processes, the S.G. of separation will vary between … Read more
The cumulative % assay of the floats or sinks is plotted against the cumulative % weight of the floats or sinks. These curves indicate cumulative assay that the cumulative floats or sinks will have at a particular S.G. of separation. They are used in conjunction with the S.G. curve and can thus predict the weights … Read more
HMS and DMS are acronyms for Heavy (Dense) Medium Separation and is applied to the process of pre-concentration of minerals – mainly the production of a high weight, low assay product, which may be rejected as waste. In principle it is the simplest of all gravity processes and is a standard laboratory method for separating minerals … Read more
Being able to recover gold using a gravity method or process does not mean that gold is free and fully/completely liberated. For example, using Automated Digital Imaging System (ADIS) for Gold Search (ADIS is an optical screening and imaging equipment package customized to locate gold occurrences in ground sample), a sub-sample of 8 samples representing 8 lithology for an … Read more
The Mozley Super Panner is used for quick and efficient drum separation of mineral groups with distinct density differences and is generally used as a cleaner unit where the mass available for upgrading is very small: typically for Au applications. A centrifugal solids-liquids separator comprises a rotatable hollow centrifuge drum at least a part of … Read more
See this Gold Shaking Table in Action to understand its operation.