MakakPL Well-Known Member. Business, Economics, and Finance. Aluminum Melting Crucible Furnace Heating element:Crucible furnaces are the oldest type of melting furnaces. Radak furnaces ship standard with an Alumina crucible because of its wide chemical and thermal compatibility. N. Major crucible melting furnaces are of steel fabricated construction using plate and rolled sections. 6. Once it was melted well, I loaded more into the crucible which made it about half full. You can collect oysters by breaking the block they are sitting on. . Ironmaking blast furnaces consist of several zones: a crucible-shaped hearth at the bottom of the furnace; an intermediate zone called a bosh between the hearth and the stack; a vertical. The exhaust gas heat is fully recovered and utilized, and the exhaust gas temperature can be as low as 180℃. 7. ”. Our ALUTEX-SAL has special additives to prevent penetration and adhering of molten aluminum and aluminum oxide. Its capacity may range from 30 to 150 kg. Subscribe to our channel here: Corporation QUARTZ CRUCIBLE 50/CS. Abstract. This furnace is specially made for cupola samples of precious metals and ashing processes. Ayrr bliss 9 yr. This issue happens when you put fish meal or bread into either the fish feeder or the crucible furnace when it has a full tank. Aluminium Al-6%Si Alloy were melted in an crucible furnace and kept at abouth 730 o C and added abouth 0,04%Sr as master alloy. (about 1 h); 3) weighing each crucible to the nearest 0. VEVOR 10KG Gas Metal Melting Furnace Propane Forge Kit Tool Crucible Gold Copper. Expand your grass area to grow more trees (or build a tree farm) Further Breeding: Use the 6x6 area to breed further mutations. Bahan bakar pemanas biasanya batu bara, minyak, gas, atau listrik. Abstract. This page contains a list of all templates currently available for use on this wiki. 2kg/min and heating efficiency of 27. It may be replaced if required. approx. Done Water spawns in strange places, mariculture crucible furnace bug ? Discussion in 'Regrowth' started by MakakPL, Nov 18, 2015. We offer materials for full relines as well as repair. Lots of armor stands. crucible furnace sections swung standard Prior art date 1913-07-25 Legal status (The legal status is an assumption and is not a legal conclusion. View Answer. Re: Oil fired crucible furnace Post by Harold_V » Thu Sep 02, 2021 6:07 am John Hasler wrote: ↑ Wed Sep 01, 2021 9:07 pm Other things being equal dropping the nozzle diameter from 4" to 1. Push-up/Drop coil furnaces: The heat-up procedure is dependant on furnace frequency, coil dimensions, and the resistivity of the metal being melted. Make sure to drop a like for more FTB Regrowth!DESCRIPTIONRegrowth is a HQM driven pack where you find yourself in a desolate wasteland, lacking in natural g. NM furnace exhibits optimum performance with our refractories. Crucible furnace is the stove and accessory commonly used of the various high temperature kilns such as the melting, cracking, electrolysis of metallurgy industry, petrochemical industry and electrochemical industry. The cast-iron crucible furnace is designed to consume four gallons of diesel fuel with a rating of 139000kj/gallon which is required to completely melt 50-kilogram of cast iron over a period of 90min. The molten. $349. The size of a cupola is expressed in diameters and can range from 1. Arc furnaces used in research laboratories and. Greetings, a. Put the ceramic crucible in the muffle furnace, raise the temperature in the muffle furnace to 500 ℃ at a rate of 5 ℃/min, wait for the temperature in the muffle furnace to reach 500 ℃, and then calcine at 500 ℃ for 4 h. 8 kg aluminum or 7 kg silver ; Graphite casting Mold: 113 ML capacity, size is 125*60*40 mm, can melt 2 kg gold, 1. It is common practice among foundrymen engaged in the manufacture of small castings from high melting point metals and alloys, to melt the charge in a crucible placed in a furnace. , cultured pearls), nutraceuticals, and cosmetics, either in the natural marine environment, or in land- or sea-based enclosures, such as cages, ponds, or raceways. First, use an analytical balance to weigh out 10 g of melamine (C 3 H 6 N 6) and place it in a 50 ml ceramic crucible. It can be made into a multi-block smelting structure by stacking several Crucible Furnace blocks atop one another. Foseco offers the foundryman a complete range of silicon carbide and clay graphite crucibles, retorts and other specialized shapes for use in fuel fired, induction and electric resistance furnaces. 7. I would be using a #3 or #4 crucible which would fit better in the smaller tank, however I think I would prefer the heavier gauge metal of the propane tank as it is. Use fuzzy export buses to pipe in random fish species, or specify which ones you want. 2. Proper aluminum crucible furnace operations. 3 kHz furnaces: It is recommended where possible to preheat the crucible empty. 7. CEM's unique, patented quartz fiber crucibles reduce ashing times by as much as 97% and cool in seconds. 2023 bronze EcoVadis medal winner. and robust custom-built equipment. I open the crucible's GUI and quickly shift-click some iron ore into it, and it crashes. If you remove the ingots, it works again. Because of its function, crucibles are necessarily made of materials which can withstand the high temperatures of the blacksmith’s furnace without sustaining damage. 3. A person who performs Thaumaturgy is called a Thaumaturge. How to use crucible in a sentence. 6. This was followed by the addition of 2 g of NaOH pellets. In the medieval period, they were either stoneware or fashioned from. The cupola can be made almost any practical size. It provides a semi-early game method of doubling ore output…. 6. Crucible furnace mariculture tutorialsbya Battlestar galactica episode guide miniseries jfk 105m capacitor code guide Urban dance camp pompeii tutorial jilbab Dsd 3u. Single Zone 1200ºC 208- 240v This came from a fortune 100 company in an idle asset sale. Tilting crucible furnaces . OreDict Name : ingotRutile. In the nutshell, it is manufactured in a variety of. Style “Crucible. The more standard wire types (chromel, FeCrAl, or APM wire) can reach temperatures of 1100ºC, 1200ºC, or 1250ºC respectively. Then you could connect insulated redstone conduits using 2 colors and use 2 levers, one to control each color. Both parts of the system, the ground leak probe and the ground detector, must function. Mariculture is a mod by joshie that expands on the aquatic environment of vanilla Minecraft. There are several advantages to using a Crucible Furnace, including: Versatility: Crucible furnaces can be used to melt a wide range of materials, including metals, alloys, glass, and ceramics. The metal is placed in a crucible which is made of clay and graphite. I actually have an emerald fluid pipe from Buildcraft Transport running from the crucible to a diamond fluid pipe that filters to 4 branches for different fluids (I run anything that can't go into Mekanism through Mariculture's crucible furnace, so that's. Aug 19, 2009. When ordering, specify crucible size for which they will be used. 1%, respectively. Crucible and Rotary furnaces are the commonest fuel-fired furnaces found in most foundries in the third world countries. Maximum recommended heating rate: 45℃ /minute. 20-25 % more energy than a melting furnace with an exhaust gas discharge over the crucible edge. Order: 1 piece. . Crucible aluminium furnace is one such heating furnace that is specially designed to serve requirement of all metallurgical industries, as the product ensure optimum results. The TOAUTP melting furnace only has a maximum crucible capacity of 3 KG, but that’s more than enough for scraps and small jewelry. 6. (melted in the Crucible furnace) and mixed the quicklime with water, and gotten the unknown magnesiish dust. Die Beschreibung hat sich vor Verwirrung selbst verletzt In 1. The positive side of it is, due to mixing, smelting accelerates and metal’s composition and temperature are aligned. 7. The Crucible is first crafted as an Unfired Crucible, which must then be cooked in a Furnace. Skull melting crucibles, otherwise known as melting hearths, have water or salt-cooled copper shells that maintain an unmelted skin. First, use an analytical balance to weigh out 10 g of melamine (C 3 H 6 N 6) and place it in a 50 ml ceramic crucible. The effect of the salt factor on the metal recovery is evident using both rotary and crucible furnaces as shown in Figure 2. lead wire. 5 to 13 feet (0. The earliest known use of the technique occurred in India and central Asia in the early 1st millennium ce. 3% for the highest SF level; the standard deviations are 0. Microprocessor-based self-tuning PID control provides optimal thermal processes without overshooting. Abstract The main deficiencies of existing induction crucible furnaces are associated with elevated wall thickness of the lined crucible, the tubular copper single-layer inductor (with internal cooling by conditioned water), and the absence or presence of surrounding vertical I-shaped composite metal rods, forming a discrete ferromagnetic. #6-10Kg Clay Graphite Crucibles Premium Black Foundry Cup Furnace Torch Melting Casting Refining for Gold. Categories: Games, Newsgroups and Message Boards Topics: big reactors ftb, feedthebees, ftb ftbees ftbee minecraft gaming feed the bees feed the beast, magical crops gem socket, mariculture crucible furnace, thaumcraft 4 cheat sheet, thaumcraft helperPastebin. 8 cm) in diameter or wider. This easy to use furnace is ideal for fast melts of aluminium. Get it as soon as Friday, Nov 24. It uses a standard 110-volt outlet, so you don’t need any special setups to start melting silver, copper, gold or other metals. 1e. b) False. The unit. 4 (Mariculture-1. 11 comments. The furnace is lined with high temperature rated refractory, backed with calcium silicate insulating board. From: Encyclopedia of Ocean Sciences. ZZ format. Scrap. The Crucible is a block added by Ex Nihilo. BENTISM Electric Melting Furnace, 3KG Digital Electric Melting Furnace, 1750W 1150/2102 Gold Smelter Furnace W/ Graphite Crucible Casting Refining Jewelry Precious Metals Gold Silver Copper Aluminu. jar), if you place unknown magnesiish dust in the furnace in the first slot and titanium ingots in the second, the furnace processes the first dust, outputs a salt, then it continues to burn fuel over and over without processing any more of the dust. CRUCIBLE FURNACE Crucible furnace is for the melting of non ferrous metals. 2. 50. Advantages provided by the electric crucible furnace is the near elimination of emissions and low metal oxidation losses. casting out of the same crucible, you also need to factor in scrap losses, which are usually quite large. 5 to 10, the former for 200 and 400 pound crucibles and the latter for 800 and 1600 pound crucibles. 99 10% off. There can be different sizes of crucible furnaces. The crucible in the furnace was allowed to cool for 25 min with a crucible tongue before transferring it to a desiccator. Please leave a. For a furnace with a cold crucible. . The working liner (14) may be cast in position against the insulating liner. Mariculture is the farming of marine organisms for food and other products such as pharmaceuticals, food additives, jewelry (e. Furnace options Crucible Furnaces (Crucible Sizes) • 2000°c Medium Laboratory Vacuum Furnace with Graphite Hot Zone Crucible Furnace, 5kW DC PSU. 6. In ancient times steel and iron were impossible to melt using charcoal or coal fires, which could not produce temperatures high enough. g-C 3 N 4 nanosheets were fabricated by a facile and widely reported method (Tian et al. 6. Furnace specifications include maximum temperature up to 1800 degrees C, volume ranging from 2 L to 16 L, inner width ranging from 150 mm to 500 mm, inner depth ranging from 150 mm to 1150 mm, inner height ranging from 150 mm to 1600 mm, outer width. Minecraft 1. 6 has maximum temperature of 1529. 12. Bait can still be manually placed into the input slots, however. 4-1. 0 m). Kirby and the Forgotten Land –. This is an electric furnace that operates at about 1,400 watts. Mariculture: ID Name : Mariculture:materials:3. Consarc Corporation. AGRARIAN SKIES 2 - Ongoing Series!!!!! MATERIAL ENERGY 4 HYPERCUBED - Series Complete! I'm trying my hand at this modpack down the HARD path. crucible: [noun] a vessel of a very refractory (see 1refractory 3) material (such as porcelain) used for melting and calcining a substance that requires a high degree of heat. Certain solid blocks can be melted down after placed in the crucible while the crucible is placed above one of the following heat sources: The. Cupellation is conducted in a muffle furnace,. The TP contents in the sediments were analyzed by the national standard method (GB 9837-1988). "YY" is the Main API version. If a crucible should break and the metal run into the chamber, it m a y be tapped out and re- T h e tilting crucible furnace is m a d e in single and double-chamber forms, Figs. With thorough industry knowledge, we are engaged in manufacturing, supplying and exporting a wide range of Tilting Crucible Aluminum Melting Furnace. Insulation plugs minimize heat loss, improving uniformity. The mod also expands upon the vanilla fishing system, adding various types of rods and loot you can catch with them, while requiring you to use bait in order to. These are: Carpets. (269) 849-2700. Can be set up to operate on either low pressure natural or propane (LP) gas. Crucible melting is commonly used where small batches of low melting point alloy are required. 1e ---- Minecraft Crash Report ---- // I let you down. From experience , the fire department aren't very freindly. It is an extensively used machine from the mod, used to melt down items and blocks by using Heat. 5 - Removed Journey map ( Performance issue) - Xaero's minimap added - Enabled sound by default ( Hopefully) - Reconfigured environmine bar. 2% for the lowest SF level, while it increases to 96. Since the crucible is heated from the bottom, local overheating of the metal is avoided, thereby, minimizing the oxidizing of the charge components. It is essential that the insulation and the heating are protected from escaping gases and vapors, therefore the furnace WT-M 110/13 is used. Standard temperature control is achieved by sensing flue gas temperature which is shown on a digital display. Blast furnaces produce pig iron from iron ore by the reducing action of carbon (supplied as coke) at a high temperature in the presence of a fluxing agent such as limestone. I am trying to decide between two possible shells for a furnace build. 1. Copper furnaces from 200kgs up to 1 Ton capacities are manufactured. Five minutes had passed and the stuff was already starting to melt. Use with crucibles and dishes 1-1/2" (3. Marine aquaculture sites at Kukup Strait in the peninsula of Malaysia are experiencing a decline in water quality in the last five years, resulting in high mortality rates (50 - 80%), seasonal massive fish mortalities and poor profitability. ChannelBoth furnace cover and lid are made of industrial refractory. Institute for Mariculture Research and Fisheries Extension,. Laboratory Tongs - Nickel-Plated Steel Crucible Tongs, 20" L; 1/Pk -- GO-06443-50. Lindberg/MPH. 2. . 5 to 4. Crucible forging furnaces use refractory materials such as ceramic to make the mold. Pearls can sometimes be found inside oysters. They provide excellent temperature control from the use of high turndown ratios and use easy-to-maintain package burners. Crucible steel is steel made by melting pig iron ( cast iron ), iron, and sometimes steel, often along with sand, glass, ashes, and other fluxes, in a crucible. You have to charge the furnace every 10 minutes, the coal is burning real quick even if the furnace is compleatly filled up. Currently, Kukup farmers are involved in intensive aquaculture within the existing aquaculture zone. An electric arc furnace ( EAF) is a furnace that heats material by means of an electric arc . In the case of the crucible furnace, the average value of metal recovery is 95. (8mm) gap between the crucible and top and sides of the furnace to allow for crucible expansion. ===== [8. 10 > mariculture mod 1. Tongue and groove crucibles are a modular crucible system that consists of a series of interlocking. Most manufactures of crucible furnaces still maintain that 3-1 hold to melt ratio. An induction furnace in which a graphite crucible is encompassed by a spaced thermal insulating sheath. furnace. All tongs are designed to allow room to set the crucible into the furnace chamber and withdraw it for pouring. 0] MARICULTURE ===== [8. Crucible Furnaces. The study carried out a design and construction of an oil-fired crucible furnace. 6 % which is quite impressive when compared with the conventional crucible furnace of maximum efficiency. 838 K would be at some region of the furnace shell. It must be surrounded by heat sources to function, for example lava. Recommended Max working temperature – 1,600 °C. Grachev A. g. Reliable, economical and efficient melting of magnesium is. Our Aluminum Crucible Furnaces are designed to be easy to use while meeting the industrial melting needs of aluminum and zinc foundries. Any crucible selected must be able to withstand the maximum BTUs the furnace fuel is able to apply to the crucible. Crucibles of graphite or of high-grade fire clay were formerly used in the steel industry, heated directly by fire; modern high-quality steel is produced by refining in air-evacuated crucibles heated by induction. yes i do repair them but i cant get the raw metal from them no mod does it, that i know of. furnace section crucible pawl upper section Prior art date 1924-12-01 Legal status (The legal status is an assumption and is not a legal conclusion. 1. [8. Max ramp rate - 5 °C/min <1200 °C or 4 °C/min >1200 °C. I have seen some that is good to 2700 degrees F. This type of furnace makes use of a refractory crucible that contains the metal charge and heated via conduction of heat through the walls of the crucible. 5"d x 8. The power required for melting is between 15KW to 160KW, which will depend on the size of the furnace. It is used to dissolve solids into liquids (namely producing Lava and Water). Crucible Type Tilting Furnaces for Copper, Aluminium, Zinc. jar, in Regrowth 0. 6. Gas, oil or propane crucible, or pot-type furnaces are available with many of the same features as the electric models: ceramic fiber lining, exceptional long life, compactness, comfort, low maintenance and easy installation. A device that provides heat for a building. Get Quote. Also Great for Silver, Copper, Brass, Aluminum . Our product line offers flexible melting and holding capacities of up to 2,400 lbs of. Use any flat scrap for the base. The world as you knew it is gone, all that is left in it's place is this barren wasteland, can restore the balance? Can you regrow what has long been dead?We. Then I looked up the process for purifying them, I need to melt down 24 blocks of limestone for quicklime then ladle all that into a vat of water. Abstract. or Best Offer. The Induction Crucible Furnace requires either Redstone Flux (RF) or Energy Units (EU) to operate and can accept up to 4000 Energy/tick (1 RF = 10 Energy, 1 EU = 40 Energy). This is described in the quest book, Chapter 5. Crucibles for Iron, Copper, Aluminum etc. The metal alloy and additives are put inside the crucible, placed above a. Thread Status: Not open for further replies. Get creative with how you get your ender chest. Crucibles, Refractories and Ceramics. Thaumcraft is based off of the form of magic known as Thaumaturgy. These eddy currents then cause the feed material. Type : Item Stackable : Yes (64) Impure Titanium Ingot is an item added by the Mariculture mod. for instance, preheated gas crucible furnace capacity 350 kilograms of molten aluminum and "swamp" about 20 % It takes about 85 minutes to, to melt a full load charge. 3. Bug fix for integer math on crucible's JEI display; Modified default ore drops to not group on gravel so much; Modified default forestry recipes to not spam so many bees on sieves; Modified default AE2 drops to be more in line with the effort of making/crushing skystoneIn addition to these factors, important parameter is the time, which is necessary to melt the fully loaded crucible furnace. 6"H, 9 liters ) and it is designed for sintering ceramic parts and components in Lab. Reactions: darkeshrine and Pyure. 4-1. The performance of the furnaces guarantees temperature that is lower than. 4-1. In seawater pond mariculture, fish are raised in ponds which receive water from the sea. Box 156 Rancocas, NJ 08073-0156. Learn More. 25 g of sample was weighed into a nickel crucible and 3–4 drops of anhydrous ethanol were added. Add a Comment. This much is fine, I have a stack and a half of impure titanium. High melting rate. Magnesium you get from melting down Limestone in a crucible than combining it with water in a vat to produce. Custom mod pack for Minecraft 1. The measured sample was ashed in the furnace at 500 ± 150 °C for 5–6 h. Tungku wadah biasanya menggunakan wadah dengan muatan logam. Gravimetric Method with Drying of ResidueCrucible furnaces are one of the oldest and simplest types of melting units used in the foundry. Supplier: Cole-Parmer. how do i make this not suck? 1. The ladle 1 comprises a cylindrical casing 2 made of a steel plate and a lining 3 lined with a heat insulating material and a refractory material inside thereof. A known mass of raw material was kept in pre-weighed ceramic crucibles and put in a muffle furnace (Forno Jung, Number 7549, Brazil) at 450 °C with an increase in temperature 10 °C min −1 with. 【Perfect 7-in-1 Melting Kit】Comes with the parcel is gold furnace machine / one graphite crucible / one graphite ingot mold / one forceps /one high-temperature gloves/one power cord/ one Instruction manual. This process can be automated with the use of hoppers. The world as you knew it is gone, all that is left in it's place is this barren wasteland, can restore the balance? Can you regrow what has long been dead?We. The TOAUTP melting furnace only has a maximum crucible capacity of 3 KG, but that’s more than enough for scraps and small jewelry. it can also produce dirt, sand and gravel. of silver per ton. In the case of smelting alloy inside a crucible furnace the increase of power from 8 to 22 kW causes the increase of liquid alloy surface from 88 to 155 cm2. Show per page. except dat anvil with exp dupe Rollback Post to Revision RollBack Hey y'all. Get Quote>. Multiple studies of CCFs have been made for their optimization, but their electrical efficiency is still low; for metals approximately 25-30%. Crucible furnace is suitable for the batch type foundries where the metal requirement is intermittent. 19. This process can be automated with the use of hoppers. Tilting furnaces can be either induction or electrical and are capable of melting steel, iron, copper, brass, gold, platinum, silver, nickel, palladium, and their alloys. , shows the fuel savings realized by the addition of a self-recuperative burner to crucible melting furnaces. It has characteristics of securing higher quality molten aluminum with lower metal loss and the easy maintenance. 495" OD – 2cc: 2"H X 0. It must be surrounded by heat sources to function, for example lava. Insulation plugs minimize heat loss, improving uniformity. This much is fine, I have a stack and a half of impure titanium ingots now. #27. An insufficient expansion gap will result in crucible cracking. {{}} forcefully moves auto-generated tables of contents to the right of the article. jar), if you place unknown magnesiish dust in the furnace in the first slot and titanium ingots in the second, the furnace processes the first dust, outputs a sal. 42. 835. MELTING TIME for melting a cast iron pot of aluminum approximately 24 minutes. Thaumcraft 6 is a reimagining of the Thaumcraft 5 mod by Azanor. The type of fuel you give the crucible furnace determines its temperature. The Induction Crucible Furnace is a machine added by Foundry. I pump from that into a Railcraft Iron Tank. Indux crucibles are typically used to melt copper alloys and precious metals. [CHANGED] River. See More Nearby Entries . To add to this complexity, customer practices across the industry are so variable that even correlating a furnace’s efficiency to its own crucible becomes extremely difficult. Iron Age. These furnaces are helpful in various industries, from steel and other metal production to glass manufacturing, ceramics and food processing, car manufacturing, and aerospace. The crucibles were then heated to 400 °C in a muffle furnace. The Sawmill from Mariculture is a block used to make blocks that can be custom-textured to look like different blocks on different sides. If the crucible has a spout, be sure there is at least a 1 ½ in. EFSP400. Document layout formatting templates [] {{}} clears floating elements with a line break. The annular space therebetween is sealed and a coil is circumferentially mounted about the sheath. You don’t know what dampness the crucible has been exposed to, so you must temper it to eliminate any moisture. The crucible is put into a heat source and then filled up with metals. This is an electric furnace that operates at about 1,400 watts. The Crucible Furnace is a functional block added by Mariculture. Indux crucibles are designed for furnaces operating in the frequency range from 1kHz and upwards with most installations typically operating between 1kHz and 3kHz. The actual furnace is about 5-6 cm smaller, so you have the air circling around the inner shell. Copper is a material and an element added by various mods. Keep the crucible in a muffle furnace and ignite at 800°C for 1 hour. ) from the tank to fuel itself. The problem is that you can't specify what's going in or out of the solid fuel, smelting mat or byproduct slots like you can in other mods through side piping, so you're forced to go crazy with filters and ultra specialize everything. Bent Handle Crucible Tongs, Size 40 and larger, will have links and ring as well as bent handles for two man handling. Specifications: Maximum Temperature for Short Time: 1200°C, Continuous Working Temperature. This research work presents the design concept, construction, and performance evaluation of a10kg capacity portable crucible furnace which uses charcoal as fuel. 10 + my mods, Silent's Gems and Silent's Pets (mod list. Abstract and Figures. It is an extensively used machine from the mod, used to melt down items and blocks by using Heat. Craft and build a crucible furnace (two block multiblock). 7. You can collect oysters by breaking the block they are sitting on. Designed for energy efficiency and compact design, the 1100°C Crucible Furnace covers a variety of vertical heat processing and melting applications. 4 (Mariculture-1. They are one of the oldest types of melting ovens and among the most commonly used furnaces in the industry. i crafted this thing to see what it did, and lo and behold i spent 15 minutes idleing waiting for it to actually heat up and it goes slower than a vanilla furnace. Titanium alloys are obtained on a large scale in arc furnaces and on a slightly smaller scale in induction furnaces with a cold crucible [30, 31], but in both cases, only part of the batch is high. . Item. The rule ofFurnished with 8″ of thermocouple and 25 ft. The furnaces are preserved in a park or museum, or. Horse armor can be cooked down into a saddle using the mariculture crucible furnace- Disabled naughty mariculture food >;3 - Added all vanilla saplings and leaves to crucible melt to water list - Get blue slime from slime sappling and leaves - Added Air quality quest Version 1. #8. These crucible tongs are made of steel and used to lift our larger crucibles from the furnace. I usually shoot for trying to get 4 redwood saplings.