Vanadium-titanium magnetite treatment method

Abstract

The invention provides a vanadium-titanium magnetite treatment method. The vanadium-titanium magnetite treatment method comprises the following steps that rough vanadium-titanium magnetite is subjected to mineral separation, and vanadium-titanium magnetite concentrate is obtained; the vanadium-titanium magnetite concentrate and coal are mixed and then directly added into a rotary kiln to be prereduced, and calcine and rotary kiln smoke are obtained; the calcine is transferred into an electric furnace to be subjected to reduction smelting, and vanadium containing molten iron, titanium slag andelectric furnace smoke are obtained; and the vanadium containing molten iron is transferred into a converter to be subjected to converting, and vanadium slag and semisteel are obtained. According to the vanadium-titanium magnetite treatment method provided by the embodiment of the invention, the vanadium-titanium magnetite concentrate is subjected to the treatment processes including rotary kiln prereduction, electric furnace reduction smelting and converter converting, thus, the metallization rate of the obtained calcine is high, the content of iron and vanadium in the titanium slag is low, valuable metal elements are sufficiently utilized, the high-grade vanadium slag and the high-grade semisteel are obtained, the foundation is laid for follow-up processing of the iron element and the vanadium element, the technological process is short, the production energy consumption can be decreased, environmental pollution is reduced, and the investment cost and production cost are reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for treating vanadium-titanium magnetite. Background technique [0002] Vanadium-titanium magnetite resources are the main mineral resources in the world's vanadium-titanium resources. At present, the processes for processing vanadium-titanium magnetite mainly include blast furnace smelting, rotary hearth furnace and rotary kiln-electric furnace smelting, etc. Among them, blast furnace smelting has a long process, high requirements on ore, high energy consumption, and low titanium grade of titanium slag obtained; compared with blast furnace smelting, the process of treating vanadium-titanium magnetite by rotary hearth furnace has the characteristics of short process and low environmental pollution. However, the rotary hearth furnace process is difficult to achieve large-scale industrial production due to its own equipment problems, and its industrial application is li...

AI Technical Summary

Problems solved by technology

Among them, blast furnace smelting has a long process, high requirements on ore, high energy consumption, and low titanium grade of titanium slag obtained; compared with blast furnace smelting, the process of treating vanadium-titanium magnetite by rotary hearth furnace has the characteristics of short process and low environmental pollution. However, the rotary hearth furnace process is not easy to achieve large-scale industrial production due to its own equipment problems, and its industrial application is limited

[0003] At present, some enterprises have adopted the "rotary kiln-electric furnace" process to process vanadium-titanium magnetite. Among them, some processes add a multi-layer shaft furnace to pretreat minerals before the rotary kiln, and use the "multi-layer shaft furnace-rotary kiln countercurrent" two The one-step roasting process treats high-quality seaside placer, and the metallization rate of the obtained calcine reaches 80%. This process performs pretreatment before the mineral enters the rotary kiln, which increases the process flow, requires large investment, high cost and energy consumption; it is also used The vanadium-titanium magnetite concentrate is processed by the downstream rotary kiln process. During the process of processing the vanadium-titanium magnetite in the rotary kiln, the flue gas and materials are used downstream, and four kinds of mixtures such as dolomite and silica need to be added. The metallization rate of the calcined sand is 45%, the process has high energy consumption and low calcined metallization rate

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