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Silicon carbide Sagger and Crucible Product Detail Product Tags The product is ideal for industrial kiln, sintering, smelting and applicable to all kinds of products. In the field of chemical industry, petroleum and environmental protection with a wide range of applications. 1) Heat shock stablity 2) chemical corrosion-resistant 3) High temper-endure(up to 1650° 4) Wearing/corrosion/oxidation resistant 5) Highly performance of mechanical strength 6) Cleaning or etching the hardest sub-surfaces 7) Used for grinding, lapping, and wire saw cutting as well as abrasive blasting Description: A crucible is a ceramic pot use to hold metal for melting in a furnace. This is a high quality, industrial grade crucible used by the commercial foundry industry. What It Does: A crucible is needed to withstand the extreme temperatures encountered in melting metals. The crucible material must have a much higher melting point than that of the metal being melted and it must have good strength even when white hot. It is possible to use a home made steel crucible to melt metals such as zinc and aluminum, because these metals melt at a temperature well below that of steel. However scaling (flaking) of a steel crucible interior surface is a problem. This scale can contaminate the melt and thin the crucible walls rather quickly. Steel crucibles will work if you are just getting started and don’t mind dealing with the scaling. Common refractory materials used in crucible construction are clay-graphite, and carbon bonded silicon-carbide. These materials can withstand the highest temperatures in typical foundry work. Silicon carbide has the added advantage of being a very durable material. Our Clay Graphite Bilge Shape crucibles are rated for 2750 °F (1510 °C). They will handle zinc, aluminum, brass / bronze, silver and gold alloys. The manufacturer states they can be used for cast iron. Made in the United States! Crucible Shapes: A bilge shaped (“B” Shape) crucible is shaped like a wine barrel. The “bilge” dimension is the diameter of the crucible at its widest point. If there is no bilge diameter shown then the top diameter is the maximum width. A rule of thumb states that the # of a “bilge” crucible gives its approximate working capacity in pounds of aluminum. For brass or bronze use 3 times the crucible #. For example a #10 crucible would hold approximately 10 pounds of aluminum and 30 pounds of brass. Our “B” shape crucibles are typically used by hobbiests and frequent casters. These are a high quality, long lasting commercial grade crucible. Check the tables below to find the right size for your job. How To Use It: All crucibles should be handled with properly fitting tongs (lifting tool). Improper tongs can cause damage or complete failure of a crucible at the worst possible time. A disk of cardboard can be placed between the crucible and the furnace base prior to heating. This will burn off, leaving a layer of carbon in between and prevent the crucible from sticking to the furnace bottom. A coating of Plumbago (Carbon Black) does the same thing. It is best to use a different crucible for each type of metal to avoid contamination. Also be sure to completely empty the crucible after use. Metal left to solidify in a crucible can expand on re-heating and destroy it. Please temper new crucibles or those that have been in storage. Heat the empty crucible for 2 hours at 220 F (104 C). (Use adequate ventilation. New crucibles will smoke as the glaze sets.) Then fire the empty crucible to a red heat. Allow the crucible to cool to room temperature in the furnace before use. This procedure should be followed for ALL new crucibles and for any crucible that may have been exposed to damp conditions in storage. Store all crucibles in a dry area. Moisture can cause a crucible to crack on heating. If it has been in storage for a while it is best to repeat the tempering. Silicon carbide crucibles are the least likely type to absorb water in storage and typically don’t need to be tempered before use. It is a good idea to fire a new crucible to a red heat prior to its first use to drive off and harden factory coatings and binders. The material should be placed into the crucible VERY loosely. NEVER “pack” a crucible, as the material will expand on heating and can crack the ceramic. Once this material has melted into a “heel”, carefully load more material into the puddle for melting. (WARNING: If ANY moisture is present on the new material a steam EXPLOSION will occur). Once again, don’t tightly pack in the metal. Keep feeding the material into the melt until the required quantity has been melted. WARNING!!!: Crucibles are dangerous. Melting metal in a crucible is dangerous. Pouring metal into molds is dangerous. A crucible may fail without warning. Crucibles can contain hidden defects in materials and manufacturing which can lead to failure, property damage, personal injury, injury to bystanders and loss of life. Crucible Base Block Description: BCS A base block is a high temperature pedestal used to raise up a crucible to the heat zone of a furnace. What It Does: A base block is generally used in a gas fired foundry furnace to lift the crucible up so that the burner flame doesn’t directly blast into the thin wall of a crucible. If the burner flame is allowed to directly strike the crucible it can cause errosion of the wall of the crucible thus shorting its life. The proper way to prevent this is to use the base block to raise up the crucible out of the burner zone. Raising the crucible also allows it to be in the “heat zone” of the furnace. Although the burner flame enters the body of the furnace at the bottom the hottest zone is from the middle up to the top. It is in this region that the walls of the furnace are heated by the circulating gas most effectively. Having the sides of the crucible in this region promotes the best heating from the turbulent gas stream and by the heat radiation of the glowing furnace inner walls. How To Use It: The base block should be tall enough to have the burner flame aligned with the top of the block. It’s ok if the top of the block is higher than the burner inlet as well. What you don’t want is to have the flame hitting the thinner sides of the crucible. It is also acceptable if the flame strikes the thicker bottom portion of the crucible as this part is not as suseptible to wear from the gas. Crucibles and Saggers:
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RBSiC (SiSiC) breogán Sonraigh Táirge Táirge Clibeanna Is é an táirge iontach do áith tionsclaíoch, shintéiriú, bruithnithe agus is infheidhme maidir le gach cineál na dtáirgí. I réimse an tionscal ceimiceach, peitriliam agus cosaint an chomhshaoil le raon leathan na n-iarratas. 1) stablity turraing Teas 2) ceimiceacha creimeadh-resistant 3) Ard temper-mairfidh (suas go dtí 1650 ° 4) Ag caitheamh / creimeadh / ocsaídiúcháin resistant 5) Fíor comhlíonadh neart meicniúil 6) Glanadh nó eitseáil an deacra fo-dromchlaí 7) A úsáidtear le haghaidh meilt, rádlaithe, agus sreang chonaic ghearradh chomh maith le pléasctha scríobach Cur síos: Is breogán úsáid POT ceirmeach miotail a shealbhú do leá i foirnéise. Tá sé seo ar ardchaighdeán, breogán grád tionsclaíoch a úsáideann tionscal teilgcheárta tráchtála. Cad An bhfuil sé: Tá breogán teastáil a sheasamh an teocht an-mhór a bhíonn i miotail leáite. Ní mór an t-ábhar breogán mbeadh leáphointe i bhfad níos airde ná sin ar an miotail á leáite agus caithfidh sé a bheith neart go maith, fiú nuair bán te. Is féidir a úsáid sa bhaile a rinneadh breogán cruach do mhiotail, mar shampla since agus alúmanam leá, mar gheall ar leá na miotail ag teocht go mór faoi bhun sin as cruach. Mar sin féin scálú Is (scealpadh) de chruach dromchla istigh breogán fadhb. Is féidir an scála contaminate an leá agus tanaí na ballaí breogán sách tapa. Beidh breogáin cruach ag obair má tá tú ag fáil díreach tosaithe agus ní miste ag déileáil leis an scálú. Tá ábhair Common teasfhulangacha a úsáidtear i dtógáil breogán cré-graifíte, agus carbón bhanna sileacain-chomhdhúile. Is féidir leis na hábhair withstand an teocht is airde in obair teilgcheárta tipiciúil. Tá Cairbíd sileacain an buntáiste breise a bheith ina ábhar an-durable. Ár breogáin Cruth Clay Graphite Bilge atá rátuithe le haghaidh 2750 ° F (1510 ° C). Beidh siad déileáil since, alúmanam, práis / cré-umha, airgead agus cóimhiotail ór. Deir an monaróir is féidir iad a úsáid le haghaidh iarann teilgthe. Déanta sna Stáit Aontaithe! Cruthanna Crucible: A bilge chruthach ( "B" Cruth) Tá breogán cruth cosúil le bairille fíona. Is é an "bilge" gné an trastomhas an breogán ag an phointe is. Mura bhfuil aon trastomhas bilge thaispeántar ansin is é an trastomhas barr an leithead uasta. Deir Mar shlat tomhais go dtugann an # de "bilge" breogán a cumas oibre neasmhéid san punt alúmanaim. Maidir le práis nó cré-umha a úsáid 3 huaire an breogán #. Mar shampla, bheadh # 10 breogán shealbhú thart ar 10 punt de alúmanam agus 30 punt de phrás. Ár "B" breogáin cruth a úsáidtear de ghnáth ag hobbiests agus casters minic. Is iad seo d'ardchaighdeán, fada buan breogán ghrád tráchtála. Seiceáil na táblaí thíos chun teacht ar an méid ceart do do phost. Conas a Úsáid sé: Ba chóir do gach breogáin a láimhseáil le tlúnna fheistiú i gceart (uirlis ardaithe). Is féidir le tlúnna míchuí ina chúis le damáiste nó teip iomlán de breogán ag an am is measa is féidir. Is féidir le diosca cairtchláir a chur idir an breogán agus an bonn foirnéise roimh a théamh. Beidh sé seo sruthán amach, ag fágáil sraith de charbón i idir agus cosc a chur ar an breogán ó sticking go bun foirnéise. Ndéanann sciath de Plumbago (Carbóin Dubh) an rud céanna. Is fearr a úsáid breogán difriúil do gach cineál de mhiotal éillithe a sheachaint. Chomh maith leis sin a bheith cinnte a fholmhú go hiomlán ar an breogán tar éis a úsáid. Miotal chlé go solidify i breogán féidir leathnú ar ath-théamh agus é a scriosadh. Tabhair faoi temper breogáin nua nó iad siúd a bhí i stóráil. Téigh an breogán folamh ar feadh 2 uair an chloig ag 220 F (104 C). (Bain úsáid as aerála leordhóthanach. Beidh breogáin nua tobac mar na tacair glaze.) Ansin tine an breogán folamh le teas dearg. Lig don breogán fuarú go teocht an tseomra san fhoirnéis roimh úsáid. Ba chóir an nós imeachta sin a leanúint chun GACH breogáin nua agus le haghaidh aon breogán d'fhéadfadh a bheith faoi lé coinníollacha taise i stóráil. Stóráil ar fad breogáin i limistéar tirim. Is féidir le Taise faoi deara breogán a crack ar théamh. Má tá sé i stóras ar feadh tamaill is fearr a dhéanamh arís ar an faghartha. Tá sileacain breogáin chomhdhúile an cineál lú dóchúlacht uisce a shú isteach i stóráil agus ní de ghnáth gá iad a tempered sula n-úsáidtear. Is smaoineamh maith chun breogán nua a chur le teas dearg dóiteáin sular chéad úsáid a thiomáint amach agus bratuithe mhonarcha harden agus chur léi. Ba chóir an t-ábhar a chur isteach sa bhreogán AN-scaoilte. NÁ "pacáiste" a breogán, mar go mbeidh an t-ábhar a leathnú ar théamh agus is féidir crack an ceirmeach. Chomh luath agus an t-ábhar leáigh isteach i "sÚil", go cúramach luchtú níos mó ábhair isteach sa lochán le haghaidh leá. (RABHADH: Má tá AON taise i láthair ar an ábhar nua a bheidh le pléascadh gaile tarlú). Arís eile, ná pacáiste docht sa miotail. Coinnigh bheathú an t-ábhar ar an leá go dtí go mbeidh an chainníocht a cheanglaítear a bheith leáite. RABHADH !!!: Tá Breogáin contúirteach. Leáphointe miotail i breogán Is contúirteach. Ag doirteadh miotail isteach múnlaí is contúirteach. Féadfaidh breogán theipeann gan rabhadh. Is féidir le Breogáin bhfuil lochtanna i bhfolach i n-ábhar agus déantúsaíochta féidir bheith ina chúis le teip, damáiste maoine, díobháil phearsanta, díobháil do bystanders agus cailliúint beatha. Crucible Base Bloc Cur síos: BCS Is bloc bonn pedestal teocht ard a úsáidtear a ardú suas le breogán leis an gcrios teas foirnéise. Cad An bhfuil sé: Tá bloc bonn a úsáidtear de ghnáth i ngás fired foirnéise teilgcheárta a thógann an breogán suas ionas nach gcuireann an lasair dóire soinneáin díreach isteach ar an bhalla tanaí de breogán. Má tá an lasair dóire a cheadaítear dul ar stailc go díreach leis an breogán is féidir é a chur faoi deara errosion ar an bhalla an breogán rud shorting a saol. Is é an bealach ceart chun cosc a chur seo a bhaint as an bloc bonn a ardú suas an breogán amach as an chrios dóire. Ardú ar an breogán freisin, is é a bheith sa "crios teasa" an foirnéise. Cé go dtéann an lasair dóire an comhlacht ar an foirnéise ag bun an crios teo ó lár go dtí an barr. Is sa réigiún seo go bhfuil na ballaí an foirnéise téite ag an gháis a scaiptear is éifeachtaí. Tar éis na taobhanna an breogán sa réigiún seo chun cinn téamh is fearr as an sruth gáis suaite agus ag an radaíocht teasa na ballaí foirnéise glowing istigh. Conas a Úsáid sé: Ba chóir an bloc bonn a bheith ard go leor chun go mbeadh an lasair dóire ailínithe leis an barr an bhloic. Tá sé ceart go leor má tá an barr an bhloic níos airde ná an inlet dóire chomh maith. Cad é nach bhfuil tú ag iarraidh a bheith acu ar an lasair ag bualadh na taobhanna níos tanaí an breogán. Tá sé inghlactha freisin má bhuaileann an lasair an chuid bun thicker den breogán mar nach bhfuil an chuid seo chomh suseptible a chaitheamh as an ngás.