Acid Mine Drainage
Hello these is a Brad Striebig and in this section we’re going to talk about what happens to acids in the environment, how they can degrade the environment but also how engineers and scientist can look at that process, understand the acidification process and remediate or restore the area that is impacted by that acid […]
Froth Flotation 101 in Video
Discussion flotation and mineral processing with industry metallurgist from around the world. Wetting and not wetting or water-absorbing is the principle of flotation. Some minerals are wetted, whereas others are not wetted. Wetting is a variable property of minerals and depends upon the surface properties of the solid, liquid, and gaseous conditions. Minerals that are […]
Rock Blasting
In this topic, we will discuss about blasting. Blasting is an operation that engineers resort to in order to break the rock mass, and to facilitate the removal of the overburden material. Blasting is am operation that has safety, stability, and economical viability issues, and it’s a science itself. First of all, blasting requires explosives. […]
Zinc Box Construction and Operation
The precipitation by zinc shavings is carried out in rectangular boxes or troughs, divided by transverse partitions into a number of compartments. The partitions are so arranged that the solution flows alternately downward through a narrow compartment, and upward through a wide one, the latter alone containing the zinc shavings. The height of every alternate […]
Effect of Particle Size on Gold Flotation Recovery
Natural or collectorless flotation of native or free gold is generally possible, at least to a degree, with many gold containing ores. The first factor in such flotation studies is the quantification of what the limitations are of particle size on the flotation process. Some unique studies have been conducted by this author at a […]
Mineral Reserves, Mineral Resources and Estimation
The goal of the exploration program is to proof up resources and reserves and to estimate the value of what is being found. In short to answer the question; Can we make money from this pile of rocks or not? Some background to this question of resources and reserves. In 1969 the Vietnam War was […]
Mine Tailings Waste Leaching & Groundwater Contamination
Each year the mining industry generates tremendous quantities of solid wastes as a byproduct of the mining and concentration or preparation of valuable ores, minerals and coal. In addition, the quantities of these wastes generated on a yearly basis is increasing due to: increased production resulting from rising demand, the depletion of near surface high-grade […]
Ferrocyanides
The study and use of ferrocyanides was initiated with the discovery of the pigment “Prussian Blue” by Diesbach in 1704. Thus, they are among the earliest commercial chemicals and have been produced in large quantities for many years. In the United States, American Cyanamid Company, with its ample supplies of cyanides as starting materials, has […]
Grinding Mill Surging
The phenomenon of “surging” in a mill is a subject upon which very little has been written; presumably because it is a condition which cannot be tolerated in mill operation and which must be eliminated by variation of some or many of the physical dimensions or characteristics of the mill or mill charge. The phenomenon known […]
Effect of Grinding Media on Milling
In the previous chapter the influence of the various physical quantities defining the mill and mill charge has been studied in connection with the performance of a mill as a device for the creation of new surface in the powder. For some purposes, however, it is also desirable that the product should have a preferred […]