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Monday, March 25, 2013

A mineral is


Minerals
A mineral is an element or chemical compound 
A mineral is normally crystalline 
A mineral can be defined as a naturally occurring inorganic solid ,it has been formed as a result of geological processes and a definite chemical composition. Some people, like physicists, might be guilty of picking up a rock and calling it a mineral. The term "rock" is less specific, referring to any solid mass of mineral or mineral-like material. Common rocks are often made up of crystals of several kinds of minerals. There are some substances, like opal, which have the appearance of a mineral but lack any definite internal structure, are sometimes called "mineraloids". Lutgens and Tarbuck give the following list of essential characteristics of a "mineral":

It must occur naturally.
It must be inorganic
It must be a solid
It must possess an orderly internal structure, that is, its atoms must be arranged in a definite pattern.
It must have a definite chemical composition that may vary within specified limits."
The most common minerals are the silicates, as one would guess by looking at the abundances of the elements in the Earth's crust, but there is a great variety of minerals. Minerals are classified in many ways, including hardness, optical properties, crystal structure, etc. Shipman, et al. comment that over 2000 minerals have been found in the Earth's crust, but that about 20 of them are common and fewer than 10 account for over 90% of the crust by mass.

Non-silicates constitute less than 10% of the Earth's crust. The most common non-silicates are the carbonates, the oxides, and the sulfides. There are also naturally occuring phosphates and salts. There are a few elements which occur in pure form, including gold, silver, copper, bismuth, arsenic, lead and tellurium. Carbon is found in both graphite and diamond form. Some minerals are valued as gems because of their hardness, color and beauty.

List of names of metals


List of names all metals

A
Aluminum.Antimony.Arsenic

B
Barium.Beryllium.Bismuth.Boron.bronze.

C
Cadmium.Cesium.Chromium.Cobalt.Copper.

G
Gallium.Germanium.Gold.

H
Hafnium.

I
Indium.Iridium.Iron.Lead.Lithium

M
Magnesium.Manganese.Mercury.Molybdenum.

N
Nickel.


O
Osmium.


P
Platinum.Palladium.

R
Rhodium.Ruthenium.Rhenium.Rubidium.

S
Scandium.Selenium.Silver.Strontium.

T
Tantalum.Tellurium.Thallium.Thorium.Tin.Titanium.Tungsten.

U
Uranium.Vanadium.

Z
Zinc.Zirconium

Top Types Of Metal Used


Five Primary Metal Types

Alaska Psychiatric Institute (API)

Aluminum

More than 3 billion pounds of aluminum is used annually in U.S. construction, and much of that is in aluminum roof construction and wall systems of commercial buildings. Aluminum is highly receptive to today’s high-performance, architectural coatings. A wide variety of factory-applied coatings and colors perform well and stay colorfast on aluminum roofs, which is critical for highly visible steep-slope roof applications. The coatings also help ensure virtually maintenance-free performance and long service life.
Copper
Saint Edward & Isadore Church
Long life and low maintenance are critically important qualities for exterior treatments of commercial buildings. Metal is emerging as the material of choice in many roof and wall applications, and copper is proving the most popular among metal types. A primary reason for this is its permanency. Copper roofs can last decades, if not centuries. The oldest copper roof in the United States was installed on the Olde Christ Church in Philadelphia in 1742. In Europe, the copper cornice around the dome at the Pantheon in Rome lasted more than 1,800 years.
Melt-Span Ballard Blocks

Steel

Steel is considered a universal building product because of its strength, versatility, durability, and economic value. Today, standing-seam metal roofs are used for countless structures, including shopping centers, schools, churches, and libraries. According to the American Iron and Steel Institute, steel roof construction is used in nearly half of all low-rise commercial, industrial, and institutional buildings erected in the past several years.
Terne
Melt-Span Bay Area Fellowship Church
Terne is produced by coating metals such as carbon steel and stainless steel with a specially formulated alloy containing zinc and tin to dramatically increase corrosion resistance. When terne roofs were first used in colonial times, it contained roughly 80% lead and 20% tin. However, in the latter half of the 20th century, as lead was found to have potentially detrimental effects on health, the lead/tin alloy was replaced. In the mid-1990s, a new and superior zinc/tin alloy was produced that provides improved performance and aesthetics over the original—minus the health risks.
Zinc
Umicore Building Products USA Inc Apartment Building
Building owners and architects are increasingly turning to zinc roof construction for its long, maintenance-free life and adaptability to various design styles ranging from traditional to modern. Zinc is a natural material that never fades and retains its look over its entire life span. It is also a noncorrosive, environmentally friendly product with a 100%-clear water runoff. Zinc's anticorrosion qualities have led its use extensively as a protective coating for steel and other metals.

Extraction of Gold


Gold mining from alluvium ores was once achieved by techniques associated with placer mining such as simple gold panning and sluicing, resulting in direct recovery of small gold nuggets and flakes. Placer mining techniques since the mid to late 20th century have generally only been the practice of artisan miners. Hydraulic mining was used widely in the Californian gold rush, and involved breaking down alluvial deposits with high-pressure jets of water. Hard rock ores have formed the basis of the majority of commercial gold recovery operations since the middle of the 20th century where open pit and or sub-surface mining techniques are used.

Once the ore is mined it can be treated as a whole ore using a dump leaching or heap leaching processes. This is typical of low-grade, oxide deposits. Normally, the ore is crushed and agglomerated prior to heap leaching. High grade ores and ores resistant to cyanide leaching at coarse particle sizes, require further processing in order to recover the gold values. The processing techniques can include grinding, concentration, roasting, and pressure oxidation prior to cyanidation.


Removing the gold-bearing rock from the ground is just the first step. To isolate pure gold, mining companies use a complex extraction process. The first step in this process is breaking down large chunks of rock into smaller pieces. At a mill, large machines known as crushers reduce the ore to pieces no larger than road gravel. The gravel-like material then enters rotating drums filled with steel balls. In these drums, the ore is ground to a fine slurry or powder.
Next, mill operators thicken the slurry with water to form pulp and run the pulp through a series of leaching tanks. Leaching dissolves the gold out of the ore using a chemical solvent. The most common solvent is cyanide, which must be combined with oxygen in a process known as carbon-in-pulp. As the cyanide and oxygen react chemically, gold in the pulp dissolves. When workers introduce small carbon grains to the tank, the gold adheres to the carbon. Filtering the pulp through screens separates the gold-bearing carbon.
The carbon moves to a stripping vessel where a hot caustic solution separates the gold from the carbon. Another set of screens filters out the carbon grains, which can be recycled for future processing. Finally, the gold-bearing solution is ready for electrowinning, which recovers the gold from the leaching chemicals. In electrowinning, operators pour the gold-bearing solution into a special container known as a cell. Positive and negative terminals in the cell deliver a strong electric current to the solution. This causes gold to collect on the negative terminals.
Smelting, which results in nearly pure gold, involves melting the negative terminals in a furnace at about 2,100 degrees F (1,149 degrees C). When workers add a chemical mixture known as flux to the molten material, the gold separates from the metal used to make the terminals. Workers pour off the flux and then the gold. Molds are used to transform the liquid gold into solid bars called doré bars. These low-purity bars are then sent to refineries all over the world for further processing.
WORLD GOLD PRODUCTION
Major gold-producing countries include South Africa, the United States, Australia, Mexico, Peru, Canada, China, India and Russia. South Africa is the leading gold-producing country, followed by the United States and Australia. In the United States, Nevada is the leading gold producer.

Rare Earth Metals Extraction


RDA Red Mud's got Titanium and Iron by-products - All You Need is Kill the Scrap Metal Industry and Agriculture benefits in The Place Beyond the Pines


“There will be no Mining operations and related pressures on the environment”

Comments by Chairman of the JBI (Jamaica Bauxite Institute), Dr. Parris Lyew-Ayee, at the Ground breaking Ceremony for Nippon Light Metal Company Limited Extraction Plant

After the announcement by Minister of Science, Technology Energy and Mining Phillip Paulwell of Jamaica’s intention to extract Rare Earth Metals from Red Mud located in the RDA (Residue Disposal Area) as originally reported in my blog article entitled “Japan’s Nippon Light Metal Company Limited to mine Rare Earth elements in Jamaica - Jack Reacher recycling gadgets for Rare Earth Elements”, the progress has been relatively brisk.

Please take note of the Word “extraction”…..it’ll pop up later in my article!

This is surprisingly fast for a Government traditionally known for dragging its feet on FDI (Foreign Direct Investment) matters! Minister Phillip Paulwell and Prime Minister Portia Simpson Miller participated in ground breaking exercise for the Extraction of Rare Earth Metals on Monday February 4th 2013.

The Ground breaking Ceremony took with Japanese officials from Nippon Light Metal Company Limited as reported in “Ground broken for Rare-Earth Project”, published Tuesday, February 05, 2013 | 8:23 AM, The Jamaica Observer and “Jamaica breaks ground on rare-earth project”, published February 4, 2013 by David Mcfadden, PhysOrg.

Again note that this is a Rare Earth Extraction Plant, not Mining. The Rare Earth Metals are already in colloidal suspension in the Red Mud Residue at concentration levels 2500 time higher on average than normally found in Red Mud in RDA for other Bauxite Mining operations worldwide as noted in “Up to 2,500 per cent higher concentration levels in Ja’s red Mud 'God-blessed dirt'”, published Wednesday, February 13, 2013 BY JULIAN RICHARDSON Assistant business co-ordinator, The Jamaica Observer.

Precipitation via the addition of a Chemical Binding Agent to react with and make an organo-metallic complex with the Rare Earth Metal. This then settles out of solution and then the Spent Liquor is decanted and recycled back into the process. The remaining residue at the bottom of the Precipitation Tanks is the Green Liquor, and is the first stage of Extraction.

Centrifuging is then used to separate the different Rare Earth Metals via Mass and then the Separate Mixtures either oxidized by a strong oxidizing agent to again precipitate out as an Oxide. This allows the Chemical Binding Agent to be recycled (especially if it’s very expensive in the Process) or Calcination to basically oxidize the Rare Earth to a Oxide, the usual form Rare Earths are sold. Milling and grading to produce powders of various particle size as per requirement by clients is the last stage; presentation is key in selling these toxic Rare Earth Metals.

As such, the Process as suggested above present no direct Mining impact on the environment as, say, Gold Mining would. NEPA (National Environment and Planning Agency) approval further proves this as noted in “NEPA gives OK to rare earth minerals application”, published Thursday January 24, 2013 | 10:10, The Jamaica Gleaner, as ironically this Rare Earth Extraction is a further Recycling of the Red Mud that’s gathering space at the back of Bauxite companies and using up Land that would have other Productive uses.





In an interview with the Jamaica Information Service a few days later as noted in “Red Mud Project No Danger to Environment”, published Monday, 11 February 2013 16:52 by Alecia Smith-Edwards, Jamaica Information Service, Dr. Parris Lyew-Ayee, Chairman of the JBI (Jamaica Bauxite Institute) gives a better answer as it relates to handling of the Bauxite Waste.

His explanation goes into a bit more detail on how safe the Rare Earth Extraction is from Red Mud located in the RDA, quote: “This red Mud will be neutralized with acid, that’s the first thing we do. The red Mud that we have in our various Mud containment ponds…are very safe and secure. It’s caustic (and) alkaline and some people would classify it as a hazardous material. This process is going to neutralize it so it would then be non-toxic. We will then be extracting the rare earth elements, Oxides, from this red Mud”.

Doesn’t get any more straightforward than that!

Public consultations aren’t necessary either as concluded in “No public consultation on rare minerals pilot plant construction”, published Sunday February 10, 2013 6:12 pm, The Jamaica Gleaner. The Rare Earth Extraction will make the problem of having a RDA disappear over time as the Extraction process picks up steam. So it’s already going to be a benefit to the people who have had to tolerate the Caustic Soda (NaOH) smell from the RDA for years.

Added to that the fact that it’s the right type of FDI income generating activity needed for Jamaica post-NDX (National Debt Exchange) as described in my blog article entitled “Jamaican Government to implement NDX, essentially JDX2 2.0 to get IMF Agreement - Tax Reform and FDI Investments Bullet to the Head and Oblivion”, and the GOJ’s “youthful exuberance” over this project is explainable.

But the Good News of Metal Extractions (notice the word again!!) apparently doesn’t stop there.

Turns out after the Rare Earth have been extracted, there may also be Titanium and Iron, also in considerably high concentration, left behind in the waste of Tailings that can also be further extracted. Titanium Oxide and Iron Oxide, both oxides of Transition Metals, may be further by-products that can be extracted from the Red Mud located in the RDA (Residue Disposal Area) as stated in the article “Jamaica hopes to harvest titanium from red Mud”, published Wednesday February 13, 2013, The Jamaica Gleaner.

Even more interesting, a tested, tried and proven method exists to resuscitate mined out Bauxite lands.

This method of Land resuscitation for Agricultural usage involves using Gypsum, chemical name calcium sulfate di-hydrate [CaSO4•2(H2O)] and dried Organic Waste from Farming or just simply Compost mixed into topsoil of mined-out Bauxite Lands as stated in the article “NCU scientist points to recognised solution for alumina dumps”, published Monday, February 11, 2013 BY RHOMA TOMLINSON Observer writer, The Jamaica Gleaner.

If this method of Bauxite Land Resuscitation which was developed by NCU (Northern Caribbean University) Dr. Mark Harris is applied wholesale, it would close the loop as it relates to the effect of Bauxite Mining on Jamaica. This as it would allow former mined out lands to be returned to Agricultural productivity, effectively a recycling even the very land used for Bauxite Mining.

Thus the fears of Opposition Finance spokesperson Audley Shaw are unfounded as noted in “Shaw concerned about environmental impact of rare earth project”, published Wednesday February 20, 2013 7:34 am, RJR News Online. No Mining is involved, merely extraction, with the waste products post-extraction of Rare Earth Metals being further recyclable for Titanium and Iron. And as an additional plus, and the land being further resuscitated via an already approved method being used by the JBI and developed, ironically, by the NCU from Manchester.

These are big revelations being made even as construction for the plant gets underway. Farming stands to benefit in The Place Beyond the Pines (2013). Even better, it’s now a strong incentive to shut down the Scrap Metal Trade as All You Need is Kill (2013) via Rare Earth Metal Mining, as there’s more Iron and Titanium in the Red Mud than currently legally available lying around to be picked up in Jamaica.

rare-earth metals extraction business for downtown plant


 “I hope that City Council, acting as the Utilities Board, will obtain outside, expert counsel in considering this proposal.”
A company that has been battling to save the Martin Drake Power Plant and it’s coal-cleaning Neustream technology that’s used there, says its newest venture could amount to 250 high-tech jobs, $400 million in construction projects and $150 million in sales.

Neumann created NeuMetals earlier this year, with the goal of extracting rare earth metals from fly ash, the leftover product from coal-fired power plants. The technology is similar to that of the NeuStream, which is in jeopardy if the Drake plant is closed as the result of a study due in mid-2013.

Neumann has filed three patents for the NeuMetals process, which he says has the additional benefit of using carbon dioxide from the power plants to extract the metals. The 14 metals that can be extracted include neodymium, europium and yttrium, all critical elements to high-tech companies.

“We’ve had great success extracting the metals from the fly ash,” he said. “Overall, we can remove about 60 percent of the metals, some of them we can remove 100 percent.”

The big payoff won’t come immediately. Neumann plans to start the project as he did the NeuStream, about 1/20th of its eventual size. By year two, he’ll start construction on a 100,000 square-foot facility.

And it will pay for itself, he says. But he’ll start with a $10 million grant from the Department of Energy, already applied for, and money from venture capitalists.

“I have people who are very interested in this,” he said. “It’s a way of getting these rare-earth metals, and it’s a way of cleaning up the coal-fired plants.”

The project won’t cost Colorado Springs Utilities a dime, he says. He wants to put the facility at Drake, so the city will reap the benefits of the jobs, sales-and-use taxes and economic development. However, he said it could also be placed at the Ray Nixon Power Plant in El Paso County.

“Or, it could go anywhere in the nation,” he said. “We need a coal-fired power plant, but we could use any one of those.”

Once the facility is started at a small level, the economics work out, he said. Basically, Neumann says the “green chemical process” will extract about $700 worth of rare-earth metals per ton of fly ash. It only costs $250 per ton to extract them.

“So there’s revenue potential there,” he said.

Neumann will make his proposal to the Board of Directors for the Colorado Springs Utilities at its January meeting. He’s hopeful that the board will approve the proposal and he can get started.

But it might not be that easy.

Tim Leigh, a board member and City Councilor, has been a long-time critic of the NeuStream, NSG’s first partnership with CSU. In that project, CSU agreed to pay a total of $121 million for the coal scrubber which will remove sulfur dioxide from coal emissions, helping the power plant reach compliance with federal regulations.

“If he brings $20 million to the table, I’ll listen with an open mind,” Leigh said of the new proposal. “It’s using Utilities as the guarantor that I find reprehensible.”

And Leigh says he won’t support it at Drake, which he thinks should be de-commissioned.

“That’s going to have to go as we have to meet expected federal regulations,” he said.

Leigh has another problem: the timing of Neumann’s announcement.

“I think it would have been better to show the proposal to the board before going to the press,” he said. “But that can be worked out.”

Mayor Steve Bach was among the first leaders who suggested that Drake be de-commissioned and torn down in order to stimulate economic development downtown. He’s urged the board to study the issue.

Sodium Metal Extraction Industrial Methods, Its Properties and Uses


Sodium Metal Extraction Industrial Methods, Its Properties and Uses

Castner's process for the manufacture of sodium metal by electrolysis
Process for the Manufacture
of Sodium Metal
Sodium is a highly reactive metal which a chemical symbol “Na” it placed in 3rd row and 1st column of periodic table in a group of alkali metals, It is identified with its atomic number 11 and atomic mass 22.989.
Where do I find it?
Naturally it is present in common salt called sodium chloride ‘NaCl’ , in chile salt petre NaNO3, cryolite(Na3AlF6) and sodium sesqui carbonate.
Extraction methods:
To extract sodium as it is we have two famous methods
Castner Process: Principle method is Electrolysis of sodium hydroxide
Down’s process: Based on Electrolysis of sodium chloride
Castner process:
By the application of electrolysis technique sodium hydroxide is fused at temperature of 318 oC so that at cathode electrode sodium get deposited and liberating oxygen at anode electrode. Steps of the process:
NaoH ↔ Na+ + OH- , this is fused sodium hydroxide reaction producing individual ions
When the electrical supplying is given sodium ion move toward       Na++ e- → Na
At anode water and oxygen are evolved due to decomposing of OH- as per the reaction,             4OH- →2H2O +O2 +4e-
Above reaction are carried continuously producing sodium collected at receiver, oxygen and hydrogen. Some of the water is evaporated or decomposed to hydrogen and oxygen.

Castner's Process for the Manufacture of Sodium Metal
The electrolytic model explains the process of operation which operates at 318-330 oC by using gas burners. Negative supply is given to solid NaOH filled in iron support and positive to the Nickel anodes the whole set up is fitted in iron pot.  The dimension this iron tank range about 1.5 ft wide and 2 ft high with a capacity of 480 kg of fused NaOH. Nickel gauze separates cathode and anode electrodes and prevents the molten sodium formed at cathode to oxygen liberated at anode. Gas burners are used for start up to raise the temperature to 315 oC as the on the run the temperature is maintained by the reaction between electrode maintain the temperature.  Sodium metal float to the surface collected in receiver provided with mantle at the top at the lid and seal from atmosphere to prevent contact of oxygen. The molten sodium is removed as on when is reaches the level. A prefect seal is maintained with the iron pot and the lid with asbestos rings.
Limitation: sodium is soluble in sodium hydroxide as the temperature rises above 315 oC and separation become inflexible.
Properties of sodium metal:
Physical:
Melting point: 97.5
Boiling point: 883
Sp gravity: 0.97 gm/cc
Conduction: good conductor of electricity
Appearance: silver white
Density compared with water: lighter than water
It can be cut with a knife, because it is soft.
 
Chemical:
Highly reactive
Burns with oxygen forming into sodium monoxide and sodium peroxide.      4Na + O2 →2 Na2O
Liberate hydrogen when reacted with Hydrochloric acid.      2Na +2HCl → 2NaCl +H2
It replaces hydrogen due to high electro positivity.       2Na + 2HNO3 →2NaNO3 +H2
When exposed to open surrounding it reacts with moisture forming Na2O and to NaOH finally to Na2CO3.
2Na + O2 → Na2O2
Na2O +H2O→ 2NaOH
2NaOH + CO2 → Na2CO3 +H2O
Sodium metal Uses:
It is a starting material for production and manufacturing of highly valuable  chemical products like sodium hydroxide, NaCN, sodamide, dyes, perfumes, artificial rubber etc,. It take can be used as reducing agent in the form of sodium amalgam, as a detecting element of nitrogen, sulphur and halogens, deals in the extraction process of boron and silicon