Doubleday Baseball tungsten dart rule is a great game for the baseball enthusiast. Unlike Baseball or Bulls-eye Baseball, this game sticks closely to the real game of American baseball. The scoring is a little more complicated than most games, but if you are a baseball fan, you'll have no problem with this one and I think you'll love it. The game may be play by two players or teams.

Other rules of baseball are played as follows:

Double Play: If there is a "force play" in effect (a runner on first, runners on first & second, or bases loaded) a double play may be scored. A double play is scored if the batter hits the triple on either side of the "pitched number".
Errors: If the pitcher's dart bounces-out, misses the board or falls out of the board, an error has occurred. The batter may now throw at any number, the first number the batter hits becomes the "pitched" number, thus giving the batter a free base. The pitcher's dart should be picked up and placed in the board to replace the batter's dart.
Sacrifice: If any runner(s) are on base, a "sacrifice" may be hit, but it must be called before the dart is thrown. A sacrifice simultaneously scores an out for the batter but moves the runner(s) up one base. A sacrifice is scored by hitting the black part around the outside of the board. If the board is missed entirely or the scoring part of the board is hit outside of the pitched number, an out is scored and the runners do not advance.

Strategy:
Pitching: Try to hit a triple or the area near the bulls-eye to block the batters ability to easily hit these areas. Additionally, if you know the batter's weakness, (i.e. a player who has trouble with 18's) trying to throw that number to make it harder for the batter.

Batting: Throwing short singles will make for easier hits and avoid slipping into double-plays somewhat. Homeruns should only be thrown when a big hit is needed (i.e. two outs, bases loaded, losing by three).

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Doubleday Baseball tungsten dart rule is a great game for the baseball enthusiast. Unlike Baseball or Bulls-eye Baseball, this game sticks closely to the real game of American baseball. The scoring is a little more complicated than most games, but if you are a baseball fan, you'll have no problem with this one and I think you'll love it. The game may be play by two players or teams.

The Object: The object of the game is to score more runs than your opponent and have the lead at the end of the 9th inning.

The Scoring: The numbers 1 through 9 are written vertically down the board to represent the innings in the game. One dart is thrown by one player from each team to determine order of play, closest to the bulls-eye goes first and the players' names are written across the top of the board in playing order. An optional diamond may be drawn to represent where the runners are (I recommend doing this, especially towards the end of the night).

The Play: The player who won the bulls-eye decides to be "pitcher" or "batter".

The "pitcher" throws one dart to score any number (except bulls-eyes) on the board. The dart is left in the dartboard for the entire time the "batter" is "at bat" (1/2 inning). This number is the scoring number for the batter. Michael recommends the pitcher's dart be heavier & wider than usual, however, I played just using the pitcher's usual darts.

The "batter" must try to get as many runners home as possible before scoring three outs.

After the batter scores three outs, the total runs for the inning are added and scored in a running total next to the current inning and play is reversed (batter becomes pitcher and vice-versa) to complete the inning. After 9 innings the player with the higher score wins. If the game is tied at the end of 9 innings, extra innings are played in the same manner as innings 1 through 9.

Only darts landing in the "pitched" number and bulls-eyes count. Any other number hit is an out except for a few special cases noted below. Scoring the darts thrown is as follows:
A double (the thin outer ring) scores a double (all runners advance two bases, batter to second, runners from 2nd or 3rd base score)
A single between the double & triple rings scores a short single (all runners advance one base, batter to first, a runner from 3rd base scores)
A triple (the thin inner ring) scores a triple (all runners advance three bases, batter to third, runners from 1st, 2nd or 3rd base score)
A single between the triple & bulls-eye scores a long single (all runners advance two bases but the batter goes only to first, runners from 2nd or 3rd score)
A bulls-eye scores a home run (all runners & the batter score)

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Under the impact of high-speed abrasive particles, the main abrasive form of tungsten carbide nozzles are erosion wear, fatigue wear and micro-cutting wear and so on, which is related to the hardness, shape, size of grind compound. The most serious abrasive place is only at the exit, where the conical section and straight cylindrical section is also relatively severe wear. Therefore, research and control is complicated in such places.

There are two methods to achieve reducing abrasion of tungsten carbide nozzle. One is to build a reasonable grinding compound jet-flow system for studying the movement of the particles and the mechanism of flow cutting, which optimizes the shape and structure inside to reduce the abrasion. The other one is looking for harder and tougher material, such as tungsten carbide, pottery, diamond and artificial gem, etc.

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Tungsten carbide two-fluid nozzle take advantage of the compressed air for atomizing, which provided by air compressor. Compared with the normal nozzle, the atomizing particle is finer and distributes more uniformly, and it is able to ensure complete evaporation. Among of similar gas-liquid atomizing spray gun, its air consumption is the lowest.

Tungsten carbide two-fluid nozzle has large cover area, the maximum diameter of the atomization up to 3μm-4μm, which mixed with smoke more fully conducive to adjust the amount of gas cooling. In addition, tungsten carbide two-fluid nozzle has excellent anti-clogging performance and it can achieve a fine atomization at lower pressure, which widely used in cement conditioning tower spraying system.

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Tungsten Ore Processing Machine

The jaw crusher or jaw breaker is also called tiger mouth. The crushing cavity of the jaw crusher is made up of dynamic jaw board and static jaw board and finishes the crushing process by simulating the movement of animal jaws.

Tungsten Ore Processing Machine

Cone crusher or cone breaker is used to crush raw materials in the following industries like metallurgy, building materials, road building, chemical and silicate industries.

Handling Materials Of Cone Crusher:

Approach adopted in new technology to evade technological gap in the existing one

The new technology developed at the National Metallurgical Laboratory, Jamshedpur adopts an integrated approach combining physical and chemical beneficiation methods to get the final product : ammonium para tungstate. In order to avoid tungsten losses in the fine size ranges, prior to final concentration, pre-concentration of the ore is carried out at relatively coarser size.

Advantage

The advantages of this technology includes the following

Higher recovery of tungsten values and the process results in the final product as ammonium para tungstate by a combination of physical & chemical methods.

Reductions in energy towards comminution of ore by carrying out pre-concentration at relatively coarser size.

Reduction in water consumption because pre-concentration is a dry processing step etc.

Brief description

Extensive characterisation and physical & chemical beneficiation studies were undertaken at the National Metallurgical Laboratory, Jamshedpur on different tungsten ore samples from a typically low grade deposit located in Degana, Rajasthan, India. Based on these studies a process has been developed for the recovery of tungsten values from the low grade tungsten ore. The process basically consists of pre-concentration of the ore at relatively coarser size by dry magnetic separation, further upgradation by gravity methods followed by chemical processing to ammonium para tungatate.

 

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Details of Present/existing/Technology. Shortfall/Technological gaps in the existing technology

Due to high density and high temperature properties, tungsten is a very important metal both strategically and industrially. Most of the present demand is met through imports of powder and concentrates. The available Indian deposits are of very low grade ranging from 0.04 to 0.2 % WO₃ against the commonly exploited ore grades of 0.5% WO₃ world over.

The existing process for the beneficiation of tungsten ore basically consists of processing of the ore by physical methods like gravity and magnetic separation to get the concentrate. But considering the low metal content and the fine dissemination of tungsten bearing minerals in the gangues in the run-of-mine ore, normally it is difficult to get the desired grade of the concentrate. Alternatively, efforts of obtaining a high grade concentrate by fine sized pulverisation and multi-stage processing leads to high losses of tungsten values. There has been a need to develop a suitable process for the recovery of tungsten values from lean grade ores. The new technology addresses this problem.

 

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Tungsten ore Beneficiation Process

Application Type: beneficiation production line

Beneficiation technology as follow:

1. Flotation and Gravity technology

2. Flotation and Magnetic Separating technology

3. Gravity and Magnetic Separating technology

4. Flotation, Gravity and Magnetic Separating technology

Tungsten ore beneficiation production line composed of jaw crusher,ball mill, classifier, magnetic separator, flotation machine,concentrator and dryer and other major equipment, with feeder,hoists,conveyors can be composed of a complete beneficiation production line. The production line has high efficiency,low-energy, high handling capacity,economic rationality.

 

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The hardness and density of tungsten are applied in obtaining heavy metal alloys. A good example is high speed steel, which may contain as much as 18% tungsten. Superalloys containing tungsten, such as Hastelloy and Stellite, are used in turbine blades and wear-resistant parts and coatings. Applications requiring its high density include heat sinks, weights, counterweights, ballast keels for yachts, tail ballast for commercial aircraft, and as ballast in race cars for NASCAR and Formula 1. It is an ideal material to use as a bucking bar for riveting, where the mass necessary for good results can be achieved in a compact bar. In armaments, tungsten, usually alloyed with nickel and iron or cobalt to form heavy alloys, is used in kinetic energy penetrators as an alternative to depleted uranium but may also be used in cannon shells, grenades and missiles to create supersonic shrapnel. High-density alloys of tungsten may be used in darts (to allow for a smaller diameter and thus tighter groupings) or for fishing lures (tungsten beads allow the fly to sink rapidly). Some types of strings for musical instruments are wound with tungsten wires. Its density, similar to that of gold, allows tungsten to be used in jewelry as an alternative to gold or platinum. Its hardness makes it ideal for rings that will resist scratching, are hypoallergenic, and will not need polishing, which is especially useful in designs with a brushed finish.

Tungsten compounds are used in catalysts, inorganic pigments (e.g. tungsten oxides), and as high-temperature lubricants (tungsten disulfide). Tungsten carbide (WC) is used to make wear-resistant abrasives and cutters and knives for drills, circular saws, milling and turning tools used by the metalworking, woodworking, mining, petroleum and construction industries and accounts for about 60% of current tungsten consumption. Tungsten oxides are used in ceramic glazes and calcium/magnesium tungstates are used widely in fluorescent lighting. Crystal tungstates are used as scintillation detectors in nuclear physics and nuclear medicine. Other salts that contain tungsten are used in the chemical and tanning industries.

Lately, tungsten is used for jewelry because of its longevity and high durability.

 

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