Precautions for the operation of coreless induction taws for conventional foundry

The following precautions are well-known to melters and foundries, and are common knowledge not only for coreless induction furnaces but also for all metal smelting operations. This is just for general knowledge and does not involve all types of operations. These matters should be explained clearly and appropriately expanded or perfected by a specific operator.

Kev ua haujlwm smelting thiab casting yuav tsum txwv rau cov neeg ua haujlwm nrog daim ntawv pov thawj tsim nyog, lossis cov neeg ua haujlwm tsim nyog hauv kev cob qhia thiab kev ntsuam xyuas, lossis kev ua haujlwm raws li cov lus txib ntawm kev tsim nyog engineering thiab cov neeg ua haujlwm hauv lub hoobkas.

Cov neeg ua haujlwm nyob rau ntawm qhov chaw yuav tsum hnav tsom iav kev nyab xeeb nrog cov thav ntawv tiv thaiv, thiab siv cov ntxaij lim dej tshwj xeeb thaum saib cov hlau kub kub.

4. Cov neeg ua hauj lwm ntawm lossis ze ntawm qhov hluav taws kub yuav tsum hnav cov rwb thaiv tsev kub thiab hluav taws kub. Synthetic chemical fiber (nylon, polyester, thiab lwm yam) yuav tsum tsis txhob hnav khaub ncaws nyob ze ntawm lub fireside.

5. Lub tshuab hluav taws xob hauv ob sab phlu yuav tsum tau kuaj xyuas ntau zaus ntawm qee lub sijhawm kom tsis txhob “haus luam yeeb”. Tom qab txias, xyuas lub qhov cub hauv ob sab phlu. Thaum lub thickness ntawm lub qhov cub hauv ob sab phlu (tsis suav asbestos board) tsawg dua 65mm-80mm tom qab hnav, lub qhov cub yuav tsum tau kho.

6. Ntxiv cov ntaub ntawv yuav tsum tau ceev faj kom tsis txhob “choj” cov ntaub ntawv. Qhov kub siab tshaj plaws ntawm cov hlau ntawm ob sab ntawm “choj” yuav ua rau corrosion ntawm lub qhov cub hauv ob sab phlu kom nrawm.

7. Lub cub tawg tshiab uas tsis muaj hluav taws xob yuav tsum tau ua los ntawm cov ntaub ntawv tsim nyog, tsim nyog rau cov hlau kom smelting, thiab kom qhuav tag ua ntej muab cov ntaub ntawv smelting. Cov ntaub ntawv sintering cov cai yuav tsum nruj me ntsis raws li tsab xov xwm no.

8. Tsawg-melting cov ntaub ntawv xws li txhuas thiab zinc yuav tsum tau ceev faj ntxiv rau cov kua kub kub xws li hlau. Yog hais tias qhov tsawg melting point additives dab dej ua ntej melting, lawv yuav boil heev thiab ua rau overflow los yog txawm tawg. Ceev faj tshwj xeeb thaum ntxiv galvanized tubular nqi.

9. Tus nqi yuav tsum qhuav, tsis muaj cov khoom siv hluav taws xob, thiab tsis xeb los yog ntub dej ntau dhau. Qhov kub hnyiab ntawm cov kua lossis cov khoom tawg hauv cov nqi tuaj yeem ua rau cov hlau molten dhau los yog tawg.

10. Movable quartz crucibles tuaj yeem siv tau thaum ob qho tib si hlau thiab coreless induction rauv yog qhov tsim nyog. Lawv tsis yog tsim los rau kub melting ntawm ferrous hlau. Cov chaw tsim khoom cov lus qhia ua haujlwm yuav tsum yog cov lus qhia rau kev siv lub crucible.

11. Thaum cov hlau raug thauj mus rau hauv lub crucible, ob sab thiab hauv qab ntawm lub crucible yuav tsum tau txais kev txhawb nqa los ntawm lub bracket. Kev txhawb nqa yuav tsum sim tiv thaiv lub crucible los ntawm slipping tawm thaum lub sij hawm casting.

12. Kev paub txog smelting chemistry yuav tsum to taub. Piv txwv li, tshuaj lom neeg xws li kev kub ntxhov ntawm cov pa roj carbon monoxide tuaj yeem ua rau cov khoom puas thiab raug mob ntawm tus kheej. Qhov kub ntawm cov cua sov yuav tsum tsis txhob ntau tshaj qhov yuav tsum tau muaj: Yog hais tias qhov kub ntawm cov hlau molten yog siab dhau lawm, lub neej ntawm lub cub tawg hauv ob sab phlu yuav raug txo kom tsawg, vim hais tias cov nram qab no cov tshuaj tiv thaiv yuav tshwm sim nyob rau hauv cov kua qaub rau hauv ob sab phlu: SiO2 + 2. (C) [Si] +2CO Cov tshuaj tiv thaiv no nce mus txog 1500 ℃ hauv cov hlau molten Cov saum toj no tau sai heev, thiab tib lub sij hawm qhov sib xyaw ntawm cov hlau molten kuj hloov, cov roj carbon tau hlawv tawm, thiab cov ntsiab lus silicon nce.

13. Qhov chaw txais yuav tsum tuav lub ntim tsis muaj kua. Kev sib cuag ntawm cov hlau kub thiab kua tuaj yeem ua rau tawg tawg thiab ua rau tus kheej raug mob. Lwm cov khoom seem tuaj yeem tiv thaiv cov hlau molten los ntawm kev ntws mus rau hauv lub tank dej los yog hluav taws kub.

14. Lub tank ntim dej yuav tsum tau npaj kom tau txais cov hlau molten txhua lub sijhawm thaum lub qhov cub induction coreless ua haujlwm. Kev nchuav yuav tshwm sim yam tsis tau ceeb toom. Nyob rau tib lub sijhawm, yog tias qhov cub hluav taws xob tsis muaj hluav taws xob yuav tsum tau muab pov tseg kom sai li sai tau thiab lub thoob (dawb) tsis haum, lub qhov cub induction coreless tuaj yeem muab pov tseg ncaj qha rau hauv lub tank dej.

15. Txhua tus neeg ua haujlwm uas tsim cov khoom siv hauv nruab nrog cev, pob qij txha, daim hlau lossis lwm yam yuav tsum nyob deb ntawm txhua qhov cub induction. Qhov chaw sib nqus nyob ze ntawm lub cuab yeej tuaj yeem cuam tshuam tam sim no ntawm txhua qhov kev cog hniav hlau. Cov neeg uas muaj lub plawv dhia pacemakers tshwj xeeb tshaj yog muaj kev pheej hmoo thiab yuav tsum nyob deb ntawm txhua qhov cub induction coreless.