公开(公告)号：US10705196B2

公开(公告)日：2020-07-07

申请号：US15812462

申请日：2017-11-14

Applicant: HATCH LTD.

Inventor： Matthew H. Cramer ,  Afshin Sadri ,  Jennifer Erskine ,  David Chataway ,  Bert O. Wasmund ,  Terry Gerritsen

IPC: G01S13/08 ,  G01F23/284 ,  G01S13/88 ,  F27D21/00 ,  F27B3/28 ,  F27B3/08

Abstract: A method for determining a length parameter of an electrode during operation of an electric arc furnace. An internal duct extends through the length of the electrode and is open at its lower end. A waveguide having a solid core is received in the internal duct and comprises a material having a low dielectric constant and high temperature resistance. The solid core of the waveguide includes at least one target. An electromagnetic radiation signal is emitted from a source and transmitted through the waveguide and the signal is diffracted and/or reflected from at least one target to produce at least one return signal which is transmitted back through the waveguide. A time or frequency difference between the emitted signal and the return signal is measured and the length parameter is calculated based on this difference.

公开(公告)号：US10174403B2

公开(公告)日：2019-01-08

申请号：US15537708

申请日：2015-12-14

Applicant: HATCH LTD.

Inventor： Sina Mostaghel ,  Matthew H. Cramer ,  Santiago Faucher ,  Lai Chi So ,  Johannes Nell

IPC: C22B7/00 ,  C22B7/04 ,  B03C1/02 ,  B22F9/08 ,  C01B13/16 ,  C01B13/34 ,  C01G55/00 ,  C04B5/00 ,  G01N33/20

Abstract: A method for recovering metal values from a molten slag composition includes atomizing the slag with an oxygen-containing gas in a gas atomization apparatus, to produce solid slag granules. Oxygen in the atomizing gas converts metals to magnetic metal compounds, thereby magnetizing the metal-containing slag granules. These metal-containing slag granules are then magnetically separated. Larger amounts of metals may be removed by passing the molten slag through a pre-settling pan with an adjustable base, and/or discontinuing atomization where the metal content of the slag exceeds a predetermined amount. Solid slag granules produced by atomization may be charged to a recovery unit for recovery of one or more metal by-products. An apparatus for recovering metal values from molten slag includes a gas atomization apparatus, a flow control device for controlling the flow of atomizing gas, a control system, and one or more sensors to detect metal values in the slag.