Fly ash generation and collection

The fly ash produced from the burning of pulverized coal in a coal-fired boiler. Typically, coal is pulverized and blown with air into the boiler's combustion chamber. Where it ignites immediately generating heat and producing a molten mineral residue. Boiler tubes extract heat from the boiler, cooling the flue gas which causes the molten mineral residue to harden and form ash (Figure 1).

Modeling for the Steady State Production of Large Open Cast Mines- Case Study

When mining company gets the lease of a mineral deposit, the difficult is then how to mine and process that deposit the optimum way. The main problem facing managers or engineers who must select on equipment selection, mine plant site and long range scheduling is how one can optimize a property not only in terms of efficiency but also as to project duration.

Application of inverse theory in open pit blasting

  Blasting is a crucial part in mining operation. Proper blasting practice not only reduces the adverse effects like peak particle velocity but also improve the production and productivity. The blasting in open pit mine is controlled by number of parameters like spacing, burden, quantity of explosive etc. The production and productivity are measured by power factor, throw, and drop.

Choice of rock excavation methods for the Swedish deep repository for spent nuclear fuel

Choice of rock excavation methods will or may have implications for a number of issues like repository layout, long term and operational safety, environmental impact, design of and operation of transport vehicles and methodology for backfilling the repository before closure as well as effects on costs and schedules. To fully analyse the issues at hand related to selection of excavation methods, SKB organized a project with the objectives:

BLAST DESIGN

HOLE PATTERNS
Hole array is the arrangement of blastholes (both in plan and section). The basic blasthole arrays are single-row, square, or rectangular and staggered arrays. Irregular arrays are also used to take in irregular areas at the edge of a regular array.

USING SIMULATION ANALYSIS FOR MINING PROJECT RISK MANAGEMENT

Abstract

As a result of the current economic crisis, which led to metal prices fall, mining company managers have been encouraged to cut costs. Thus, improvement projects to reduce cost has become major interest in the Mongolian mining industry. 

OPERATIONS MODELING AND ANALYSIS OF AN UNDERGROUND COAL MINE

Abstract

In general, it is quite difficult to describe and model operations and conveyance systems precisely in underground coal mines because of geological components, poor visibility, unreliable installed facilities, and difficult work conditions.

Application of a Particle Swarm Algorithm to the Capacitated Open Pit Mining Problem

Abstract:

In the Capacitated Open Pit Mining Problem, we consider the sequential extraction of blocks in order to maximize the total discounted profit under an extraction capacity during each period of the horizon.

Economy - mining process English / French

Autogenous grinding: The process of grinding ore in a rotating cylinder using large pieces of the ore instead of conventional steel balls or rods.

Broyage autogène: Méthode de broyage utilisant un cylindre rotatif dans lequel de gros blocs de la matière à broyer remplacent les barres ou les boulets d'acier habituellement utilisés.

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MINING SUPPORT PACKAGE METALLIC ORES AND MINERALS

 This document is an overview of the environmental impacts of metal mining and processing.
It is general in nature and is provided as an introduction to some of the methods available to prevent, control, and mitigate these impacts. Metals are a valuable natural resource for many countries and a necessity for the economies of all nations that depend on metal products. However, unless proper controls are taken in mining and processing metals, serious environmental damage can result. 

MINE CLOSURE AND POST-MINING MANAGEMENT

By Christophe DIDIER
President of the Mine Closure Commission:

"Taking part in the mine closure commission has been a wonderful experience.
I would like to warmly thank each member for his generous and precious involvement in the commission process, from a technical but also and probably above all, from a human point of view.

An Optimisation Approach to Materials Handling in Surface Mines

In the surface mining industry the equipment selection problem involves choosing a fleet of trucks and loaders that have the capacity to move the materials speci ed in the mine plan. The optimisation problem is to select these fleets such that the overall cost of materials handling is minimised.

A new algorithm for the open-pit mine scheduling problem

By the Autors:

    For the purpose of production scheduling, open pit mines are discretized into threedimensional arrays known as block models. Production scheduling consists in deciding which blocks should be extracted, when they should be extracted and how each extracted block should be processed. Blocks which are on top should be extracted fi rst, and capacity constraints limit the production each time period.

OPEN PIT MINE DESIGN OPTIMIZATION by FLOATING SLOPES METHOD

In the last decades of the 20th century, growing processing power of computers has made possible to apply a number of methods for the determination of ultimate pits. These methods are: Lerchs-Grossmann method (Lerchs & Grossmann, 1965; Alford & Whittle, 1986),

Relating high-resolution tilt measurements to the source displacement of an M2.2 event located at Mponeng gold mine

Japanese-German research at Mponeng gold mine, South Africa

A unique experiment, called JAGUARS (JApanese-German Underground Acoustic emission Research in South Africa), involved the installation and monitoring of several sensitive seismic instruments from 2007 to 2009 at Mponeng gold mine, South Africa (Figure 1).

Sample of a marine placer gold deposit

A placer deposit is a naturally occurring phenomenon in which detrital or residual material containing valuable minerals is accumulated through weathering of the source rocks and mechanically deposition either on land or in large water bodies such as lakes or oceans. Primary mineral elements such as gold, silver, and diamonds are examples of placer  materials. Cronan (1980) classifies placer minerals into two broad groups: namely, heavy mineral placers and light heavy mineral placers, based on the specific gravity of the minerals. Minerals such as cassiterite, platinum, and gold are high specific gravity minerals with specific gravities ranging from 6.8 to 21.

best practice in Sampling

In a keynote address at the Sampling 2008 conference in Perth, François-Bongarçon (2008) stated that the modern sampling theory (the Theory of Sampling – TOS) is enjoying its golden age, sixty years after its inception and after alternate periods of acceptance and
rejection by the industry. Pollard et al. (2009) explained that, from their experience in
industry, education, training, and professional development, the minerals industry regards
sampling as an important part of its operations, but often does not recognize the
differences between good and bad sampling practices.

gold production

An interesting Gold Mining Company , minerals come from five different mine shafts and four different waste discharges containing rocks are marginal ore processed in a joint plant to produce gold bars.