Method for enriching niobium from titanium-containing ferrocolumbium concentrate through dressing-metallurgy combination

A combination of dressing and smelting, iron ore concentrate technology, applied in the fields of mining, metallurgy and resource comprehensive utilization, can solve the problems of low niobium ferroniobium content, reduced yield, increased energy consumption per unit of product, etc., to achieve high production efficiency, reaction Fast, easy-to-automate effects

Active Publication Date: 2017-07-28
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the niobium-rich slag (material) is used to produce ferroniobium, the content of niobium in the obtained ferroniobium is also relatively low, the yield of niobium will decrease, and the energy consumption per unit product will also increase accordingly

Method used

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  • Method for enriching niobium from titanium-containing ferrocolumbium concentrate through dressing-metallurgy combination
  • Method for enriching niobium from titanium-containing ferrocolumbium concentrate through dressing-metallurgy combination
  • Method for enriching niobium from titanium-containing ferrocolumbium concentrate through dressing-metallurgy combination

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Embodiment 1

[0024] according to figure 1 process flow shown, will contain Nb 2 o 5 3.18% low-niobium niobium ferro-niobium concentrate ore powder, coal powder with a weight of 12% of the niobium-iron concentrate weight, CaCO with a weight of 30% of the niobium-iron concentrate weight 3 , industrial pure Na with a weight of 1% by weight of ferroniobium concentrate 2 CO 3 , the binder whose weight is 2% of the ferroniobium concentrate weight is conveyed to the mixer through a belt for mixing, and the moisture content of the mixed material is adjusted to 7%. The mixed material is conveyed to the double-roller ball pressing machine through the belt to make carbon-containing pellets, the pressure is 15MPa, and the size of the pellets is 40×30×20mm pillow-shaped ellipsoid. The raw balls are dried and spread on the carbonaceous refractory material of the rotary hearth furnace in a single layer, and a layer of 10-20mm thick carbonaceous powder is laid on the carbonaceous refractory material i...

Embodiment 2

[0028] according to figure 1 process flow shown, will contain Nb 2 o 5 6.40% titanium-containing ferro-niobium concentrate ore powder with higher niobium content, coal powder with a weight of 12% by weight of ferro-niobium concentrate, CaCO with a weight of 30% by weight of ferro-niobium concentrate 3 , industrial pure Na with a weight of 1% by weight of ferroniobium concentrate 2 CO 3 , the binder whose weight is 2% of the ferroniobium concentrate weight is conveyed to the mixer through a belt for mixing, and the moisture content of the mixed material is adjusted to 7%. The mixed material is conveyed to the double-roller ball pressing machine through the belt to make carbon-containing pellets, the pressure is 15MPa, and the size of the pellets is 40×30×20mm pillow-shaped ellipsoid. The raw balls are dried and spread on the carbonaceous refractory material of the rotary hearth furnace in a single layer, and a layer of 10-20mm thick carbonaceous powder is laid on the carbon...

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Abstract

The invention discloses a method for enriching niobium from titanium-containing ferrocolumbium concentrate through dressing-metallurgy combination, and belongs to the field of mining industry, metallurgy and resource comprehensive utilization. The method is characterized in that titanium-containing ferrocolumbium concentrate mineral powder, a carbonaceous reducing agent, CaCO3, an additive and a binder are taken as raw materials; ferrocolumbium separation is realized through processes such as batching, uniform mixing, agglomerating and reduction melting to prepare raw iron and niobium-rich slag with Nb2O5 content of 5-12%, wherein raw iron can be used as a steelmaking raw material, aggregation and growth of niobium minerals are realized by performing slag-phase tempering and slow-cooling crystallizing on the niobium-rich slag, and the dimension of the niobium minerals can be 20-50 [mu]m; and the element niobium is further enriched by fine-grinding and flotation, so that niobium-rich slag concentrate with Nb2O5 content of 15-40% is obtained, and a recovery rate of niobium is 70-85%. The obtained niobium-rich slag concentrate can replace high-grade niobium minerals to produce high-grade ferrocolumbium, so that the low-grade niobium resources of China can be sufficiently utilized, and efficient utilization of the niobium resources is realized. The method is simple in process, is short in flow, is high in efficiency, and has relatively good social and economic benefits.

Description

technical field [0001] The invention belongs to the fields of mining, metallurgy and resource comprehensive utilization. It involves coal-based direct reduction of titanium-containing ferroniobium concentrate-slag-iron melting-slag controlled crystallization-niobium-rich slag fine grinding flotation to achieve high-efficiency enrichment of niobium in low-grade ferroniobium concentrate, which is used in Baiyun Obo niobium development and utilization of resources. Background technique [0002] Niobium is an important rare metal with wide application and strategic value. 79% of the world's niobium resources are used to produce low-alloy high-strength steel, which is widely used in vehicles, ships, railways, buildings and oil and gas pipelines; vacuum-grade niobium-nickel heat-resistant alloys are used to manufacture aerospace and aviation engines; in addition, related superconducting materials has also been widely used. Therefore, niobium is an important strategic resource f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/10C22B1/242C22B34/24B03D1/02
CPCB03D1/02C21B13/0006C21B13/105C22B1/242C22B34/24
Inventor 王广杜亚星王静松薛庆国
Owner UNIV OF SCI & TECH BEIJING
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