公开(公告)号：US20240018622A1

公开(公告)日：2024-01-18

申请号：US18041094

申请日：2021-07-26

Applicant: CALIX LTD

Inventor： Mark Geoffrey Sceats ,  Adam Vincent ,  Andrew Okely ,  Matthew Boot-Handford ,  Dabin Wang ,  Lakshmi Vazhapully ,  Terrance Banks

IPC: C22B1/02 ,  C22B26/12 ,  C22B1/26

CPC classification number: C22B1/02 ,  C22B26/12 ,  C22B1/26

Abstract: A method for heating a powder material to induce a crystalline phase change in the grains of the particle comprising the steps of: a. preheating the powder from the high temperature streams generated from cooling the phase changed product; b. injecting the powder into a metal tube; c. controlling the gas composition in the metal tube by injecting a gas into the reactor; d. externally heating the first section of the tube by a first furnace segment system; e. externally heating the second section of the tube by a second furnace segment system; f: quickly quenching the powder product temperature in a cold third segment of the tube; g. collecting the processed powder at the base of the tube in a bed ejecting the powder from the tube; h. cooling the powder in a heat exchanger and using the heat to preheat the powder in step a.