Method for cooling chlorinated roasting pellets

• Main Authors: WANG WEIZHEN, GUO CHIHAO, WANG YUN, XU XIAOHUI, CHANG YAOCHAO, SUN LIUGEN, LI JUNCHAO
• Format: Patent
• Language: English
• Published: 19.08.2015
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for cooling chlorinated roasting pellets, which comprises the following steps: sending cold air and hot chlorinated roasting pellets from a rotary kiln into a heat exchanger for exchanging heat to generate hot flue gas, wherein the temperature of the hot chlorinated roasting pellets before heat exchange is 900-1200 DEG C, temperature of cold air is 10-30 DEG C, the temperature of the chlorinated roasting pellets before heat exchange is reduced to 60-100 DEG C, and temperature of the cold air is increased to 300-600 DEG C; separating gas and solid of the hot flue gas after heat exchange by a dust collector; exchanging heat of gas and liquid, then concentrating a solution; exchanging heat of the separated hot flue gas and a chloride solution for exchanging heat, concentrating the chloride solution, sending the concentrated chloride solution to a granulation workshop section, returning the cooled air through a blower fan to the heat exchanger for exchanging heat, and then cyclically utilizing. The method has the advantages of short process flow, strong adaptability, environmental protection, no exhaust gas and smoke dust discharge, and can reduce the valuable metal loss due to carrying in air.