IMPURITY REMOVAL METHOD FOR SILICATE SOLID WASTE AND USE THEREOF

WIPO Patent Application WO/2022/237705

A1

An impurity removal method for silicate solid waste and the use thereof. The impurity removal method comprises the following steps: (A) heating and melting silicate solid waste to be treated, so as to form a melt, and delaminating the melt during a reduction reaction process; (B) subjecting an upper-layer melt component, which is obtained by delaminating, to magnetic phase-induced crystallization to obtain a ferromagnetic phase solid; and (C) subjecting the ferromagnetic phase solid to magnetic separation, wherein the resulting residual phase is solid waste which has been subjected to impurity removal. The impurity removal method can effectively reduce the content of the main impurities in solid waste which has been subjected to impurity removal, and the solid waste which has been subjected to impurity removal can be directly used as a raw material for preparing high-value-added materials such as insulating ceramics and glass ceramics.

DENG TENGFEI (CN)
GUO CAISHENG (CN)
CHEN WEI (CN)

PCT/CN2022/091589

November 17, 2022

May 09, 2022

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UNIV WUHAN TECH (CN)

B09B3/00; B09B5/00; C03C1/02; C04B33/132; C04B33/135

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CN112570127A	2021-03-30
CN104404260A	2015-03-11
CN107447113A	2017-12-08

LI, AIMIN ET AL.: "Experimental Study on the Deep Iron Reduction from Low-iron Red Mud by Bayer Process in Molten State", MINING RESEARCH AND DEVELOPMENT, vol. 38, no. 10, 31 October 2018 (2018-10-31), pages 101 - 105, XP009541000, ISSN: 1005-2763

ZHEJIANG KG IP LAW FIRM (CN)

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