Comprehensive utilization method of columbite

A niobium ferro-niobium and ferro-niobium technology, applied in the field of smelting, can solve the problems of high recovery cost of niobium-iron ore and difficult separation of ferro-phosphorus

Active Publication Date: 2021-05-14
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a method for comprehensive utilization of niobite ore to solve the problems of high recovery cost of niobite ore and difficult separation of phosphorus and iron in the prior art

Method used

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  • Comprehensive utilization method of columbite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The niobium iron ore is directly sent to the feeding port of the side blowing furnace through the belt conveyor, and put into the furnace (the amount of pre-mixed coal is 0).

[0063] Once the niobium ore is put into the molten pool of the side-blowing furnace for reducing side-blowing smelting, coal powder and oxygen-rich gas are sprayed into the molten pool by the side-blowing lance. The oxygen-rich gas is composed of oxygen and air. , the main technical parameters of the side blowing furnace injection system are: coal powder 292kg, oxygen 290Nm 3 , air 131Nm 3 , the oxygen-enriched concentration is 75.07%, the temperature of the side-blowing furnace molten pool is 1450~1500℃, and it can produce 673kg of slag, 106kg of phosphorus-containing molten iron, 78kg of smoke and dust, and 784Nm of high-temperature flue gas 3 . Among them, the composition of slag: 3.22%FeO, 0.47%P 2 o 5 , 0.99%Nb 2 o 5 , 1.21%REO; composition of phosphorus-containing molten iron: 0.1%C, ...

Embodiment 2

[0067] The niobium-iron ore and anthracite are fed into the feed port of the side-blown furnace directly using a belt batching (100kg of anthracite is added to each ton of ore) according to the mass ratio of 100:10, and then put into the furnace.

[0068] Niobium iron ore and anthracite are put into the molten pool of side-blowing furnace for reduction and side-blown smelting. Coal powder and oxygen-rich gas are sprayed into the molten pool by side-blown lance. When mining, the main technical parameters of the side blowing furnace injection system are: coal powder 160kg, oxygen 268Nm 3 , air 37Nm 3 , the oxygen-enriched concentration is 89.98%, the temperature of the side-blowing furnace molten pool is 1350~1400℃, and it can produce 668kg of slag, 109kg of phosphorus-containing molten iron, 75kg of smoke and dust, and 650Nm of high-temperature flue gas 3 . Among them, slag composition: 2.57%FeO, 0.94%P 2 o 5 , 1.00%Nb 2 o 5 , 1.22%REO; composition of phosphorus-containin...

Embodiment 3

[0072] The niobium-iron ore and anthracite are fed into the feed port of the side-blowing furnace directly using a belt batching (400kg of anthracite is added to each ton of ore) according to the mass ratio of 100:40, and then put into the furnace.

[0073] Niobite II and anthracite are put into the molten pool of side-blowing furnace for reduction and side-blowing smelting. Natural gas and oxygen-rich gas are sprayed into the molten pool by side-blowing lance. The oxygen-rich gas is composed of oxygen and air. , the main technical parameters of the side blowing furnace injection system are: natural gas 30Nm 3 , oxygen 278Nm 3 , air 722Nm 3 , the oxygen-enriched concentration is 42.83%, the temperature of the side-blowing furnace molten pool is 1350~1400℃, and it can produce 605kg of slag, 172kg of phosphorus-containing molten iron, 91kg of smoke and dust, and 1410Nm of high-temperature flue gas 3 . Among them, slag composition: 3.22%FeO, 0.63%P 2 o 5 , 1.74%Nb 2 o 5 , ...

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Abstract

The invention provides a comprehensive utilization method of columbite. The comprehensive utilization method of the columbiobite comprises the following steps of S1, carrying out reduction side-blown smelting on the columbiobite in a side-blown furnace to obtain molten iron, furnace slag and phosphorus-containing flue gas; and S2, carrying out deep reduction on the furnace slag in an electric furnace, and obtaining ferroniobium, slag rich in rare earth and electric furnace flue gas. According to the comprehensive utilization method of the columbite provided by the invention, firstly, the columbite is subjected to reduction side-blown smelting to achieve separation of phosphorus and iron, and the phosphorus content in the obtained molten iron and the furnace slag is low, so that the problem caused by the high phosphorus content in raw materials in the subsequent niobium and rare earth extraction process is solved; and reduction side-blown smelting and deep reduction are both low-cost smelting modes, so that the recovery cost of metal in the columbite is effectively controlled. Meanwhile, waste heat of the side-blown furnace can be recycled, the produced electric energy can be used for deep reduction in a subsequent electric furnace, and dependence on external electric energy resources is reduced. In the deep reduction stage, an iron-containing material is added to serve as an additional iron source to achieve deep reduction, and niobium molten iron is formed.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to a comprehensive utilization method of niobium iron ore. Background technique [0002] At present, minerals associated with various elements such as niobium, iron, phosphorus and rare earths are generally separated and enriched by mineral processing, reduction roasting-magnetic separation, reduction roasting-electric furnace melting, blast furnace reduction, etc. to separate and enrich valuable elements. [0003] Usually the mineral processing method requires a combination of multiple mineral processing processes, including gravity separation, magnetic separation, flotation and other mineral processing methods. The mineral processing process is long, the water consumption is large, and there are many equipments. It is especially not suitable for water-deficient areas and areas with high environmental protection requirements for water treatment. And the beneficiation method genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/24C22B59/00C21B11/00C22B5/10
CPCC22B34/24C22B59/00C21B11/00C22B5/10Y02P10/143
Inventor 李东波陈学刚王云郭亚光徐小锋黎敏
Owner CHINA ENFI ENGINEERING CORPORATION
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