Pure tungsten electrode is one of the types of tungsten electrodes. When compared with other types of tungsten electrodes, such as, thoriated tungsten electrode and lanthanum tungsten electrode, it can show their commons and differences. There are some points comparing in this article, such as, grade, color sign, surface and so on.

NOTE: G refers to Ground, S refers to Swaged, E refers to electrolytic polished, and D refers to as drawn.



 

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The size of sand grain has obvious influence on the abrasion of nozzle. When the grain is small and its kinetic energy is also small so that the impact to nozzle material will be small and has elastic deformation. When the sand grain size exceeds a certain range, material impact is enough to cause fracture. If the size of grain increases further, the nozzle material is also cut deeper, the abrasion is more serious. But when the particle size increases to a certain degree, "size effect" will occur. This is due to the force area material will also increase, the material wear size increases with increases slowly. In addition, the shape of grain will affect the abrasion. The smoother shape of the grain (form factor＜1), the slighter abrasion.















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First of all, the concentration of sand grain can be neglected. The higher concentration means that the more sand grains, which collide with nozzle inner wall will be more seriously. So the abrasion of nozzle inner wall is proportional to the number of the grain the sand flow contains. However, if the grain exceeds a certain number, the space of the movements will be limited so that the abrasion will decrease.

And the hardness of the sand grain is also important. To some extent, the abrasion of nozzle depends on both nozzle material and the sand grain hardness. When the hardness of grain is lower than nozzle hardness, such as tungsten carbide and pottery, the grain is not able to cut into the material. So the abrasion is slight and fatigue wear is the main abrasive pattern. When the hardness of grain is equal to nozzle, the abrasion is increasing. If the hardness of grain is higher than nozzle, such as some metal materials, it is called micro-cutting abrasion.

















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A few die-hard darts enthusiasts enjoy using old-fashioned horsehair boards rather than more modern varieties. Often, these horsehair boards are dragged out of basements and attics after years of neglect and seem beyond repair. Holes, faded bristles and mildew are problems that you can remedy in a few simple steps. With some care and attention, your grandfather's dartboard can look almost as good as new.

Things you'll need:
Screwdriver
Steel brush
Toothpicks
Rags
Wood polishing oil

Instructions:
1. Check the dartboard for air holes. A large pocket of air might suggest that the bristle surface has become detached from the frame. If this is the case, throw the dartboard out, because it is ruined.

2. Remove the wire casing that covers the dartboard and lies over the numbers and the scoring sections. You might find that the casing can be lifted out of the holes, but if you are having difficulty, use a screwdriver to remove it and put aside.

3. Clean the surface of the dartboard with a wire brush to remove stubborn dirt and residue. Use gentle motions to avoid damaging the dartboard. If there is mildew, take the dartboard outside and let it sit in the sun. Ensure it does not come in contact with water.

4. Basic household materials can be used to clean your dartboard.
Moisten rags with wood polish and apply it to the horsehair dartboard using circular motions. If you see holes and fading, one reason might be that the bristles have dried out. The wood polish restores and re-hydrates the bristles.

5. Let the dartboard sit for a day. Check the dartboard by inserting a toothpick into the middle of it. If it comes out dry, apply another coat of wood polish. Repeat the process until the toothpick comes out moist at the tip. Then the dartboard is ready to use.

6. Place the metal casing back onto the dartboard and mount the board on the wall. Let the games begin.

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Fifty-One/Fifty-Seven tungsten dart rule is an excellent practice game to really sharpen your accuracy on triples. It may be played by any number of players or teams.

The Object: The object is to reach a pre-determined score first.

The Scoring: What number you are going to play needs to be determined, either 51 or 57, and should be written at the top of the scoreboard. For the example in this game, we'll use 51. What score you're going to play to should also be written at the top of the board. I like to play to 300, however, 500 or 1000 also works well if you're looking for a longer game. You may also handicap players by requiring weaker shooters to score 300 while stronger ones 500 or 1000.

Player’s names are written across the top of the board in playing order. Playing order is determined by a throw of one tungsten dart by each player/team at the bulls-eye. Closest to the bulls-eye goes first.

The Play: The board is scored in the standard way. The thin outer "doubles" ring counts as two times numbers hit, the thin inner "triples" ring counts as three times and the remaining wedges count as the numbers hit.

Generally, you begin by trying to throw the triple-17. If you hit the triple-17, you have already scored 51 and you turn is complete. You do not have to throw all three tungsten darts.

If the triple-17 is missed, you must now hit any combination of numbers on the board with one or two of your remaining tungsten darts and end up with a total of exactly 51.

If you scored a total of exactly 51, add to your side of the board (keep a running total). If you scored a total of less than or more than 51, you did not score for that round. Play continues on to the next player and alternates until one player/team has scored 300 or above (or whatever goal was decided upon in the beginning).

You can play this game using any number that is score with a one-dart-triple: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57 or 60. The most common games are for 51 or 57.

The Strategy: This game has no strategy, it is a game of accuracy.

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A tungsten dart flight sits on the shaft at the end of the tungsten dart and stabilizes the tungsten dart as it soars through the air. Think of flights as the tungsten dart's wings. They come in a variety of shapes and are made of various sturdy materials, with nylon being common. Accessory for tungsten dart flights are protectors, which are useful and simple to install.

Using Tungsten Dart Flight Protectors:
Flight protectors are small objects that fit over the back center of the flight. They're typically made of metal or plastic and provide a few benefits. Flight protectors keep the flight spread, which helps with aerodynamics, reducing unnecessary movement while the tungsten dart is airborne. This helps you hit the target more accurately. Flight protectors also help prevent damage to the flight when it is already on the board and hit by another tungsten dart. To use your flight protectors, spread your flights out so that the wings are completely open and simply clip the flight protector on to the center of the flight.
 

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14 Stop tungsten dart rule is an easy and fun game that may be played by as many teams as wish to play. It is almost the same game as regular Baseball with a twist to make it more interesting.

The Object: The object is simple: score the most amount of runs each inning, the highest score at the end of the game wins.

The Scoring: The numbers 1 through 9 are written in ascending order on the left side of the scoreboard. All players names are written in batting order across the top (batting order may be determined any way, usually one tungsten dart each at bulls-eye with the closest throwing first and the furthest last). A grid may be drawn around the numbers and the names for easier reading.

The Play: One player on each team is chosen to hit the 14's and the other to score the runs.

The 14 shooter always throws first in each inning, trying to throw as many 14's as possible.

Each scorer then throws three tungsten darts at the number of the current inning. If no 14's were hit by the 14 shooter, the score for the inning is zero. The target is 1's in the first inning, 2's in the second, etc. Each number only counts in that actual inning. For example, if a 4 is hit in the first inning, it does not count. The thin outer "double" ring counts as two runs, the thin inner "triple" ring counts as three runs with the other sections of that number counting as one run. The score is multiplied by the number of 14's hit by the 14 shooter. Therefore, the highest attainable score in any one inning is 81 (three triple 14's=9 and three triples by the scorer=9, 9x9=81).
The number of runs scored is not multiplied by the inning number. For example, in the second inning, the 14 shooter hit one 14 and the scorer hit two single 2's; that players score would be two for that inning.

Usually a running total is kept with the current inning's score being added to the current total. This way, players can see how far ahead or behind they are and save a lot of time not having to add all nine innings at the end of the game.

If there is a tie at the end of the ninth inning, extra innings are played with bulls-eyes as the target. Extra innings continue until after all players have thrown for that inning and no tie exists.

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The game of 501 tests your ability to consistently hit high numbers every time you step up to the line. The main thing to remember is to relax and trust your game. It also helps to memorize all of the tungsten dart sequences for your out numbers. Here are some tips that can teach you advanced strategies for 501 tungsten darts.

Work on slowing down your breathing. You just hit a ton-40 and everybody gives you a high-five. Your adrenaline is pumping, you feel like you can conquer the world. Then you step up the line for your next shot and you throw a bag of nails (11 shot). What happened between these two turns? You got pumped up and full of energy, that's what happened. This change in demeanor can alter your throw. Relaxed and calm is how you want to be on the line. Just take a few deep breaths between shots, forget about your last throw and visualize your tungsten darts in the triple ring.

Follow your aim. Sometimes you can find yourself throwing poorly because you are trying too hard to aim your tungsten darts. Concentrating too hard on each dart’s destination can cause you to get tense and can easily spiral out of control. You might even find yourself battling darts. Consider focusing your aim on your first dart and then use that dart as a marker dart. As long as that first dart is a good shot, all you have to do is repeat your throwing motion at your marker dart. By not having to concentrate on aiming every tungsten dart you can maintain a relaxed and calm state of mind, which is the key to throwing great tungsten darts.

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The game of 501 tests your ability to consistently hit high numbers every time you step up to the line. The main thing to remember is to relax and trust your game. It also helps to memorize all of the tungsten dart sequences for your out numbers. Here are some tips that can teach you advanced strategies for 501 tungsten darts.

Find your hot number. Don’t ignore numbers on the board just because they aren’t the highest on the board. If you’re hot on 18s, run with them. A good general rule of thumb is to hit a total of 60 points or better per round. Four 18s will get the job done. Remember that this is a numbers game – go with what you feel comfortable with and hit a lot of them.

Ignore your opponent's throws. It sounds crazy, but there is very little gained from knowing he/she just threw a ton-80 or an eight. A lot of people let this affect their game in a bad way. In 501 the dartboard is your competitor. Beat it by consistently hitting your numbers. There is one exception to this rule. If you thrive on adversity then knowing your opponent's score could pump you up to throw better.

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Advantages and Characteristics

1 High capacity

2 High concentration ratio and high recovery

3 Easy to install, operate and maintain

4 The pulsation curve is saw-tooth wave shape facilitate heavy mineral to settling

5 Saving water 30-40% than ordinary jig

6 The pulsation speed very easy adjusted by regulator

7 Can achieve a good result in processing such as placer gold, tungsten,iron, tin, hematite, copper, tantalum-niobium, titanium, manganese, barite, zirconium, chrome and gemstone etc.

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