What Is ISL Uranium Mining

In situ leach mining (ISL), also known as in-situ mining or solution mining, was first used as a means to extract low grades of uranium from ore in underground mines. First used in Wyoming in the 1950s, originally as a low production experiment at the Lucky June mine, it became a high-production, low cost method of fulfilling Atomic Energy Commission uranium requirements at Utah Construction Company's Shirley Basin mining operations in the 1960s. Pioneered through the efforts of Charles Don Snow, a uranium mining and exploration geologist employed by Utah, many of his developments are still used today in ISL mining.

What is ISL mining? According to the Wyoming Mining Association website, ISL mining is explained in the following manner. (We choose Wyoming because it is the birthplace of "solution mining" as it was originally called.)

"In-situ mining is a noninvasive, environmentally friendly mining process involving minimal surface disturbance which extracts uranium from porous sandstone aquifers by reversing the natural processes which deposited the uranium.

To be mined in situ, the uranium deposit must occur in permeable sandstone aquifers. These sandstone aquifers provide the "plumbing system" for both the original emplacement and the recovery of the uranium. The uranium was emplaced by weakly oxidizing ground water which moved through the plumbing systems of the geologic formation. To effectively extract uranium deposited from ground water, a company must first thoroughly define this plumbing system and then designs well fields that best fit the natural hydro-geological conditions.

Detailed mapping techniques, using geophysical data from standard logging tools, have been developed by uranium companies. These innovative mapping methods define the geologic controls of the original solutions, so that these same routes can be retraced for effective in situ leaching of the ore. Once the geometry of the ore bodies is known, the locations of injection and recovery wells are planned to effectively contact the uranium. This technique has been used in several thousand wells covering hundreds of acres.

Following the installation of the well field, a leaching solution (or lixiviant), consisting of native ground water containing dissolved oxygen and carbon dioxide, is delivered to the uranium-bearing strata through the injection wells. Once in contact with the mineralization, the lixiviant oxidizes the uranium minerals, which allows the uranium to dissolve in the ground water. Production wells, located between the injection wells, intercept the pregnant lixiviant and pump it to the surface. A centralized ion-exchange facility extracts the uranium from the barren lixiviant, stripped of uranium, is regenerated with oxygen and carbon dioxide and recirculated for continued leaching. The ion exchange resin, which becomes 'loaded' with uranium, it is stripped or eluted. Once eluted, the ion exchange resin is returned to the well field facility.

During the mining process, slightly more water is produced from the ore-bearing formation than is reinjected. This net withdrawal, or 'bleed,' produces a cone of depression in the mining area, controlling fluid flow and confining it to the mining zone. The mined aquifer is surrounded, both laterally and above and below, by monitor wells which are frequently sampled to ensure that all mining fluids are retained within the mining zone. The 'bleed' also provides a chemical bleed on the aquifer to limit the buildup of species like sulfate and chloride which are affected by the leaching process. The 'bleed' water is treated for removal of uranium and radium. This treated water is then disposed of through waste water land application, or irrigation. A very small volume of radioactive sludge results; this sludge is disposed of at an NRC licensed uranium tailings facility.

The ion exchange resin is stripped of its uranium, and the resulting rich eluate is precipitated to produce a yellow cake slurry. This slurry is dewatered and dried to a final drummed uranium concentrate.

At the conclusion of the leaching process in a well field area, the same injection and production wells and surface facilities are used for restoration of the affected ground water. Ground water restoration is accomplished in three ways. First, the water in the leach zone is removed by "ground water sweep", and native ground water flows in to replace the removed contaminated water. The water which is removed is again treated to remove radionuclides and disposed of in irrigation. Second, the water which is removed is processed to purify it, typically with reverse osmosis, and the pure water is injected into the affected aquifer. This reinjection of very pure water results in a large increment of water quality improvement in a short time period. Third, the soluble metal ions which resulted from the oxidation of the ore zone are chemically immobilized by injecting a reducing chemical into the ore zone, immobilizing these constituents in situ. Ground water restoration is continued until the affected water is suit
able for its pre-mining use.

Throughout the leaching and restoration processes, a company ensures the isolation of the leach zone by careful well placement and construction. The well fields are extensively monitored to prevent the contamination of other aquifers.

Once mining is complete, the aquifer is restored by pumping fresh water through the aquifer until the ground water meets the pre-mining use.

In situ mining has several advantages over conventional mining. First, the environmental impact is minimal, as the affected water is restored at the conclusion of mining. Second, it is lower cost, allowing Wyoming's low grade deposits to compete globally with the very high grade deposits of Canada. Finally the method is safe and proven, resulting in minimal employee exposure to health risks."

ISL mining may be the wave of the future of U.S. uranium mining, or it may become an interim mining measure, in areas where the geology is appropriate for IS. Until sufficient quantities of uranium are required by U.S. utilities to fuel the country's demand for nuclear energy, ISL mining may remain the leading uranium mining method in the United States. At some point, an overwhelming need for uranium for the nuclear fuel cycle may again put ISL mining in the backseat, and uranium miners may return to conventional mining methods, such as open pit mining.

Source: http://ezinearticles.com/?What-Is-ISL-Uranium-Mining&id=183880

Metallurgist Roles in Mining Companies

Mining of metals and minerals is a growth industry, especially in Africa, providing job opportunities for metallurgists to work in various roles. Positions are well paid as metallurgists are required to have at least one degree from an accredited university or college. The preferred qualifications are a Bachelors Degree in Extractive Metallurgy or Metallurgical Engineering or BSc. in Chemical Engineering with a major in Mineral Processing. This is not a profession where candidates can learn the required skills on the job although experience can be gained throughout their career by expanding their exposure to different types of work on mines.

The type of work they do

The most common metallurgist roles include project management, consulting, technical or site management and research. For example, on a mine he/she would be expected to:

•    Design work programs and manage all metallurgical testing both in-house and with external service providers and laboratories

•    Work with the senior team to review and evaluate technical solutions

•    Liaise with geologists and other technical personnel to ensure the most suitable metallurgical solution is understood and employed

•    Constantly re-evaluate the metallurgical performance

At middle management level, as a project manager they would coordinate day-to-day mining activities, manage quality assurance and generally ensure a smooth operation. Mining companies look for a minimum of 5 years experience before they post these types of managers to remotely located mines. At the most senior level metallurgists can become mine managers which includes coordinating all operations, staffing, running the site itself, selecting the extraction process, and resolving operational and business issues.

Furthering a career

Metallurgists with further education and extensive experience in many technical processes become professional consultants or researchers either working directly for a large mining company or for a consulting firm contracted to it. Their role may be to advise clients on process engineering, to perform cost analyses or do budgeting. They may get involved in environmental impact assessments, HSEQ and social responsibility as well. The mining industry is constantly updating its methods of extraction and waste management in order to stay profitable and needs researchers to continue to explore new methods and processes. Pay levels vary depending on work experience, area of expertise and the location where they are posted.

Some of the personal attributes required to be successful in this field are to be an effective team player, have a high level of inter-personal communication skills and be able to express yourself in writing. A good knowledge of French is often asked for when an African posting is offered. Because of inhospitable locations and remoteness of mines, most of the postings attract single people or more mature staff who do not have school-going children.

Source:http://ezinearticles.com/?Metallurgist-Roles-in-Mining-Companies&id=6678129

Coal Mining: Timeless Black Gems

Coal is an abundant sedimentary rock and fossil fuel used primarily as an energy source for electricity and other industrial uses such as smelting and alloy production. Coal is seldom confused with charcoal, which is primarily of wooden origin. Coal was previously used as mere household heating commodities but when the industrial revolution began, coal mining started to became large-scale. It then became an important commodity to produce electricity as well as to provide primary energy for industries as well as transportation during the 18th century to the 1950s.

Coal mining can be a very dangerous activity most especially when it involves mining underground. Gases produced can be very toxic or highly flammable, capable of explosions which can instantly kill a team of miners. Fortunately, technology has enabled companies the capacity to effectively protect their workers from the hazards of coal mining. But not only that, they can also do the same or even higher output even with significantly less number or workers.

Coal mining can involve mining underground by shaft mining or, for a more accessible and easier way, open pit mining the rock strata coal beds or coal seams. However, there are several other ways in coal mining.

Coals near the surface can be extracted by using open cut mining methods. Explosives are first used to break through the surface of the mining area and after which it is removed by draglines or by shovel and a truck. With the coal seam exposed, drills are utilized to fracture and thoroughly mine it in strips. Area mining involves drilling holes against the surface of the mining area and then planting the drill holes with explosives. When the surface is exposed, there will be a coal seam exposed. This can be extracted, mined and transported with trucks immediately. If it is still hard enough, this can also be drilled and blasted with explosives. The coal can then be collected until there is none left in the strip - then the process can be repeated to create a new mining strip. This coal mining method is most ideal for flat terrain.

One particular coal mining method is controversial. This is the mountaintop removal mining - and just as its name says, it's literally removing the mountain top, making the ridges and hill tops look like flattened plateaus. It is controversial because it drastically alters the topography as well as disturbing the ecosystem. Valleys will be filled the extracted prize and streams will be covered. The objective to coal mining was to extract these valuable energy sources, but is it really worth the damaging the environment or even risk worse consequences?

Source:http://ezinearticles.com/?Coal-Mining:-Timeless-Black-Gems&id=6333094

The Coal Mining Industry And Investing In It

The History Of Coal Usage

Coal was initially used as a domestic fuel, until the industrial revolution, when coal became an integral part of manufacturing for creating electricity, transportation, heating and molding purposes. The large scale mining aspect of coal was introduced around the 18th century, and Britain was the first nation to successfully use advanced coal mining techniques, which involved underground excavation and mining.

Initially coal was scraped off the surface by different processes like drift and shaft mining. This has been done for centuries, and since the demand was quite low, these mining processes were more than enough to accommodate the demand in the market.

However, when the practical uses of using coal as fuel sparked industrial revolution, the demand for coal rose abruptly, leading to severe shortage of the coal output, gradually paving the way for new ways to extract coal from under the ground.

Coal became a popular fuel for all purposes, even to this day, due to their abundance and their ability to produce more energy per mass than other conventional solid fuels like wood. This was important as far as transportation, creating electricity and manufacturing processes are concerned, which allowed industries to use up less space and increase productivity. The usage of coal started to dwindle once alternate energies such as oil and gas began to be used in almost all processes, however, coal is still a primary fuel source for manufacturing processes to this day.

The Process Of Coal Mining

Extracting coal is a difficult and complex process. Coal is a natural resource, a fossil fuel that is a result of millions of years of decay of plants and living organisms under the ground. Some can be found on the surface, while other coal deposits are found deep underground.

Coal mining or extraction comes broadly in two different processes, surface mining, and deep excavation. The method of excavation depends on a number of different factors, such as the depth of the coal deposit below the ground, geological factors such as soil composition, topography, climate, available local resources, etc.

Surface mining is used to scrape off coal that is available on the surface, or just a few feet underground. This can even include mountains of coal deposit, which is extracted by using explosives and blowing up the mountains, later collecting the fragmented coal and process them.

Deep underground mining makes use of underground tunnels, which is built, or dug through, to reach the center of the coal deposit, from where the coal is dug out and brought to the surface by coal workers. This is perhaps the most dangerous excavation procedure, where the lives of all the miners are constantly at a risk.

Investing In Coal

Investing in coal is a safe bet. There are still large reserves of coal deposits around the world, and due to the popularity, coal will be continued to be used as fuel for manufacturing process. Every piece of investment you make in any sort of industry or a manufacturing process ultimately depends on the amount of output the industry can deliver, which is dependent on the usage of any form of fuel, and in most cases, coal.

One might argue that coal usage leads to pollution and lower standards of hygiene for coal workers. This was arguably true in former years; however, newer coal mining companies are taking steps to assure that the environmental aspects of coal mining and usage are kept minimized, all the while providing better working environment and benefits package for their workers. If you can find a mining company that promises all these, and the one that also works within the law, you can be assured safety for your investments in coal.

Source: http://ezinearticles.com/?The-Coal-Mining-Industry-And-Investing-In-It&id=5871879

Websites Can Contractually Restrict Third Party Scraping of Their Data

E-commerce service providers can contractually prevent other websites from copying factual information from their website for commercial use, such as for price comparison purposes.

On 15 January 2015, the Court of Justice of the European Union (CJEU) confirmed in a preliminary ruling that websites not protected by a database right, are free to impose contractual restrictions on the use of their data. Interestingly, the CJEU acknowledged that the contractual restrictions could – if national law permits - be imposed through the website’s terms and conditions.

Let’s have a quick look at how this matter arose. Since the early days of online reservations, some websites discovered that they could attract a lot of visitors by comparing the online prices displayed by e-commerce websites selling competing goods and services. Originally such third party websites were called “content aggregators” and today one particular type, so-called “price comparison” websites, is widely-known.  To be able to aggregate such content and create added-value for the consumer, these websites use automated software that visits the e-commerce websites and copies the latter’s pricing information in real time. This practice is often referred to as “screen scraping” and frequently occurs in the online travel reservation business. Some of these third party websites do not only show the compared prices of airline tickets but act as an intermediary for booking travel packages, including car and hotel rental services on top of the airline ticket, often after adding a commission.

In response, low-cost airlines quickly started taking legal action against such screen scraping practices, fearing the loss of such additional, revenue-generating services to these third party websites and also through suffering reputational damage when consumers were not properly informed about issues such as flight changes and cancellations. In these circumstances there was one case between the low-cost airline, Ryanair, and the third party website owner, PR Aviation BV, in which the Dutch Supreme Court made a preliminary ruling request to the CJEU.

The CJEU, in its preliminary ruling on the scope of database protection and contractual freedom, ruled in Ryanair’s favour. It concluded that, in the absence of any database related copyright or sui generis protection on Ryanair’s website, Ryanair was expressly allowed to lay down contractual limitations on the use of its website by third parties. Ryanair would not have had such contractual freedom if its database enjoyed copyright or sui generis database protection (due to the restriction laid down in Article 15 of the Database Directive 96/9/EC). Ryanair’s terms and conditions, to which users had to visibly agree when searching for flights (but without needing to explicitly tick a box), indeed stated that the use of any automated system or software to extract data from its website for commercial purposes was prohibited. Ryanair even went as far as to explicitly state that other websites could not sell its flights and that price comparison websites had to enter into a written licence agreement with Ryanair,
to access Ryanair’s price, flight and timetable information for the sole purpose of price comparison.

As a consequence of the CJEU’s ruling, any website making available mere factual information not protected by any legal right, can still prevent others from using such information through its terms and conditions. Clearly, that website will have to demonstrate under applicable (national) law that the website visitor is contractually bound, in particular because it validly agreed to such terms and conditions. Depending on the applicable law, such agreement by the consumer could be considered as having taken place by ticking a box or merely after having been made aware of the website’s terms and conditions.

The CJEU’s ruling is likely to impact upon the business model of a number of content aggregating/price comparison websites. The ruling’s concrete relevance, however, will have to be assessed on a case-by-case basis.

Source:http://www.timelex.eu/en/blog/detail/websites-can-contractually-restrict-third-party-scraping-of-their-data

Top Tips for Data Mining Success

You may have trieTips for data mining successd data mining before but you seem to be lost in the maze of confusion, data overload, and a number of strange terms and icons. Do not fret, you are not alone. There may be a number of first timers who are in the same boat as you do. Stop, refocus and start all over again with the following tips in mind.

It is important that proper handling of the data mining procedure must be employed. Easy as it may sound, it can only bring in great results when it is placed in the expert hands and when done according to the right patterns and processes. This is not to say that data mining is only successful for a gifted and trained few. It means serious consideration, preparation, and training must be part of the groundwork before disembarking into it.

The most practical and tested tips are: know your desired outcomes; set expectations; assign the right personnel; avoid data dump; create a deployment scheme; develop a maintenance plan.

Know your desired outcomes

As the major proprietor of your business, you of all people should have a clear view in mind of what you really want for your business. Thus, before trying on new strategies and techniques that are recommended to you, you must know what your desired outcomes are. For instance, if your business is in real estate, you must be able to foresee which direction your market should go. Are you going up on skyscrapers or towards the horizons in the countryside? From great lengths, you go to the specifics and clearly spell out what you want and where it should be.

Set expectations

In connection with identifying your outcomes, you must also set realistic and attainable expectations. These are the very things that preclude possible obstacles and frustrations in the coming years. You can see where your business is going by web research or data mining. You can see the past and present of your competitors and you can also set your own future based on the experiences of others. It is often wise to set expectations that you have not attained before. It is like plowing and preparing the ground because you know rain is coming and it is the right time to plant and gain great harvest.

Assign the right personnel

When you find the right person as well as the right data mining service, you can cut short tiresome planning, devising and preparation. If you are in a small enterprise, you can spearhead the procedure but if you have enough staff at your disposal, choose one who is not only knowledgeable but also reliable and dedicated. You do not want someone who is only a good starter and one who would leave you hanging when the going gets tough.

Avoid data dump

Being sure of what you want can help you avoid unnecessary data. Data mining like real mining is being able to know where the gold is and is able to get it done in the most efficient and effective way. Being able to identify the legal sites and reliable, well researched information is the short cut to finding the right and exact data. It would be a waste of time and effort if you are aimlessly opening and clicking on unsure and ambiguous websites. There are a lot of links that lead you to more links and are simply making money out of others’ ignorance.

Create a deployment scheme

Like any other venture, you must also be able to delegate the task as well as the information that you gather. Since you are not a superhuman, learn to seek the assistance of others and be sure that you know who to trust. In addition, you must have a classification and segregation of the needed materials so that these will be easy to locate and analyze. In other words, order and proper organization is another tip in order to achieve success in data mining.

Develop a maintenance plan

Finally, along with orderliness and efficiency, you must see to it that you have an effective maintenance plan. What to do with old data and where to store the vital ones are concerns that need to be considered too. In addition, there is a need for a watchdog in the whole duration of your business venture. This will not only assure you of security of your data but also keep you on healthy and solid ground. This maintenance can be both a cleaning and healing spot for your business’ overall life and sustainability.

So much can be said about how to go about with your business using data mining but there is a factor that is uniquely your own. Above and beyond all these techniques and strategies, trust your instincts. You are the better judge of your desires and actions; thus, you must spend time alone in reflection, contemplation and retrospection. Being silent and alone can make you see things that are missed among all the movements and noise. Once in a while, leave the scene and look objectively at your work. Remember, there is wisdom in alienation and objectivity.

Source: http://www.loginworks.com/blogs/web-scraping-blogs/213-tips-for-data-mining-success/