CA2178763A1 - Ingot Preheater and Transfer for Magnesium Melt System - Google Patents

Ingot Preheater and Transfer for Magnesium Melt System

Info

Publication number
CA2178763A1
CA2178763A1 CA2178763A CA2178763A CA2178763A1 CA 2178763 A1 CA2178763 A1 CA 2178763A1 CA 2178763 A CA2178763 A CA 2178763A CA 2178763 A CA2178763 A CA 2178763A CA 2178763 A1 CA2178763 A1 CA 2178763A1
Authority
CA
Canada
Prior art keywords
furnace
die cast
temperature
cast machine
magnesium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2178763A
Other languages
French (fr)
Other versions
CA2178763C (en
Inventor
Brian W. Le Gras
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Musket System Design and Control Inc
Original Assignee
Musket System Design and Control Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Musket System Design and Control Inc filed Critical Musket System Design and Control Inc
Publication of CA2178763A1 publication Critical patent/CA2178763A1/en
Application granted granted Critical
Publication of CA2178763C publication Critical patent/CA2178763C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details peculiar to crucible or pot furnaces
    • F27B14/14—Arrangements of heating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/28—Arrangement of controlling, monitoring, alarm or the like devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/14—Charging or discharging liquid or molten material
    • F27D3/145—Runners therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

Process and Apparatus providing a fully automated magnesium melt system. Raw magnesium ingots are moved through a preheater chamber where they are thoroughly dried by being controllably heated to a temperature in the range of 150°C to 250°C, preferably 200°C to 225°C, before they are introduced into a melt cell also referred to as a furnace. The ingots, are monitored for temperature by an infra red temperature sensor or a direct contact type thermocouple and this determines whether the ingot is ready to be charged into the furnace. A furnace metal level probe monitors the metal level and a control unit causes ingot charging as determined by a process level set point or temperature overshoot. The melt cell, or furnace uses a closed loop P.I.D.
(Proportional Integral Derivative) equation that is enhanced in a PLC (Programmable logic controller) program by introducing variables that are interactive with an ingot being charged to the furnace metal bath, the die cast machine being started and placed into automatic cycle or semi-auto, and also by which furnace control mode the operator has selected i.e. run mode (production) or idle mode (non-production, weekend) via the operator computer interface. There are two heating zones of heat in the furnace with each zone supplied by its own 3 phase zero cross fired silicon controlled rectifier firing boards which are gated by A 4-20mA
gating signal. This controls how much the SCR's are allowed to conduct. The amount of error between the metal bath set point and the actual metal bath temperature automatically determines how much of the 4-20mA gating signal is required to maintain a predetermined metal bath temperature. Liquid magnesium is transferred from the furnace to the die cast machine shot sleeve pour hole by a siphon transfer tube which has two sets of electrical heating elements.

The melt cell upon receiving a request from the die cast machine for material will, as long as all conditions are met in the melt cell PLC program, allow the transfer tube to lower to the die cast machine pour hole. The transfer tube valve then opens for the length of time set by the operator via the operator computer interface, providing all safety conditions are met and sensor activated for signal to PLC. Upon completion the valve closes and the transfer tube raises to its home position to be ready for the next cycle. The signal to the die cast machine that the pour is complete is given as soon as the valve closes and the tube begins to raise. Interactive communication between the die cast machine computer, a control computer and other monitoring or remotely located computers provide complete process control and information.
This provides total control of the temperature of the magnesium at all times, for safe operational quality and cost effective casting.
CA002178763A 1995-06-06 1995-06-06 Ingot preheater and transfer for magnesium melt system Expired - Fee Related CA2178763C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002151076A CA2151076C (en) 1995-06-06 1995-06-06 Controlled magnesium melt process, system and components therefor

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002151076A Division CA2151076C (en) 1995-06-06 1995-06-06 Controlled magnesium melt process, system and components therefor

Publications (2)

Publication Number Publication Date
CA2178763A1 true CA2178763A1 (en) 1996-12-07
CA2178763C CA2178763C (en) 1999-04-20

Family

ID=4156001

Family Applications (3)

Application Number Title Priority Date Filing Date
CA002178763A Expired - Fee Related CA2178763C (en) 1995-06-06 1995-06-06 Ingot preheater and transfer for magnesium melt system
CA002178762A Expired - Fee Related CA2178762C (en) 1995-06-06 1995-06-06 Electrically heated metal melt cell
CA002151076A Expired - Fee Related CA2151076C (en) 1995-06-06 1995-06-06 Controlled magnesium melt process, system and components therefor

Family Applications After (2)

Application Number Title Priority Date Filing Date
CA002178762A Expired - Fee Related CA2178762C (en) 1995-06-06 1995-06-06 Electrically heated metal melt cell
CA002151076A Expired - Fee Related CA2151076C (en) 1995-06-06 1995-06-06 Controlled magnesium melt process, system and components therefor

Country Status (1)

Country Link
CA (3) CA2178763C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052760A1 (en) * 2000-10-25 2002-05-08 Rauch Fertigungstech Gmbh Device for heating molds
DE10339526A1 (en) * 2003-08-21 2005-03-31 Strikowestofen Gmbh A pre-heater for a smelting furnace has a vertical chain conveyor and buckets for the metal and a forced air heating system and input and output doors

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102234715B (en) * 2010-04-26 2013-01-02 宝山钢铁股份有限公司 Cross steel tapping control method for blooming furnace group
EP2546593B1 (en) 2011-07-12 2015-03-04 SMS Concast Italia S.p.A. Device for transferring a metallurgical material
CN106766903A (en) * 2016-12-02 2017-05-31 熊运海 A kind of alloy pig feeding device
CN107062901B (en) * 2017-02-17 2019-04-02 马鞍山奥特佳机电有限公司 Aluminium alloy concentrates melting furnace liquid outlet limiting device and its installation and debugging method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052760A1 (en) * 2000-10-25 2002-05-08 Rauch Fertigungstech Gmbh Device for heating molds
DE10339526A1 (en) * 2003-08-21 2005-03-31 Strikowestofen Gmbh A pre-heater for a smelting furnace has a vertical chain conveyor and buckets for the metal and a forced air heating system and input and output doors
DE10339526B4 (en) * 2003-08-21 2006-04-06 Strikowestofen Gmbh Preheating device for ingots to be melted in a melting furnace

Also Published As

Publication number Publication date
CA2178762A1 (en) 1996-12-07
CA2178762C (en) 1999-04-20
CA2151076C (en) 1996-07-23
CA2178763C (en) 1999-04-20

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed