Abstract: The present invention pertains to a device for controlling a gaseous mixture comprised in a portable enclosure as well as an enclosure comprising such device and a monitoring system comprising at least one corresponding enclosure. Accordingly, a device (1) for controlling a gaseous mixture (2) comprised in a portable enclosure (10) is suggested, which comprises a gas delivery device (3) for the delivery of at least one gaseous component (20, 22) to the gaseous mixture (2) and/or a gas removal device (4) for the removal of at least one gaseous component (20, 22) from the gaseous mixture (2), a gas monitor device (5) configured to detect at least one parameter (50) relating to the gaseous mixture (2), and a control unit (6) in communication with the gas monitor device (5) to receive the detected parameter and configured to determine an information (60) relating to the gaseous mixture (2) based on the received parameter (50).

Abstract: The present invention relates to a gravity/flotation circuit where a mineral stream, such as a flotation rougher or cleaner concentrate, undergoes a two stage size separation wherein: i) the screen of the first stage provides a coarse stream of particles greater than 110 microns and a fines stream of particles less than 110 microns; and ii) the fines stream of less than 110 microns is subjected to the second stage separation whereupon a cyclone provides an ultrafine/slimes stream of p80 less than about 25 microns and a middlings stream of p80 greater than around 25 microns. The middlings stream is subjected to flotation to recover nickel sulphide which is sent to final concentrate, and reject or depress magnesia which undergoes gravity separation to concentrate the MgO. It has been discovered that a large proportion of the MgO minerals in the concentrate are contained in the 30 to 100 micron size fraction and that they are well liberated making physical separation possible.

Abstract: The present invention relates to a gravity/flotation circuit where a mineral stream, such as a flotation rougher or cleaner concentrate, undergoes a two stage size separation wherein: