Suspended secondary fast reduction process for iron-containing materials and device therefor

一种含铁物料悬浮二级快速还原工艺方法及其装置

Abstract

本发明属钢铁冶金技术领域和气固相热交换或热反应领域,涉及一种含铁物料悬浮还原工艺方法,以及实现该方法的二级悬浮还原炉装置。本发明的喷射还原炉中气、固两相向上并流,气固两相接触充分,传热、传质系数大,使含铁物料得以快速还原,干燥速度快,物料颗粒在系统中平均停留时间大为缩短。系统热效率大大提高,热耗降低至1800千卡/公斤还原含铁物料以下。系统稳定性好,设备安置紧凑,占地面积小,投资费用少,生产能力高,产品金属化率高,在85~97%范围内可控,质量均匀。
The invention belongs to the technical field of iron and steel metallurgy and the field of gas-solid heat exchange or thermal reaction, and relates to a suspended reduction process of iron-containing materials and a secondary suspended reduction furnace device for implementing the process. In the injection reducing furnace, the gas phase and the solid phase flow upwards in parallel and the gas phase and the solid phase are in full contact, with large heat-transfer coefficient and large mass-transfer coefficient, so that the iron-containing materials are reduced and dried quickly and the retention time of material granules in the system is greatly shortened. The heat efficiency of the system is greatly increased. The thermal loss is reduced below 1800 kilocalories per kg of reduced iron-containing materials. The suspended reduction process has the advantages of high system stability, compact equipment installation, small size, low investment, high production capacity, high product metallization rate, controllable metallization rate within the range from 85% to 97%, and uniform product quality.

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (0)

    Publication numberPublication dateAssigneeTitle

NO-Patent Citations (0)

    Title

Cited By (2)

    Publication numberPublication dateAssigneeTitle
    CN-101748234-BDecember 28, 2011莱芜钢铁集团有限公司一种悬浮预还原短流程连续炼钢方法
    CN-103060505-AApril 24, 2013莱芜钢铁集团有限公司一种用粉矿和煤氧直接炼钢的设备