Comprehensive Utilization Method of Niobium Iron Ore

A niobium iron ore and molten iron technology, applied in the field of comprehensive utilization of niobium iron ore, can solve the problems of high cost of niobium iron ore recovery and difficult separation of phosphorus and iron, and achieve the effects of cost control, low heating cost and reduced dependence

Active Publication Date: 2021-08-03
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 Niobium Iron Ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The tantalum mine is directly sent to the side blowing furnace feeding opening through the belt machine, and in the furnace (the preparation of coal is 0).

[0063] The ribs mine is invested to the side blower fuse tank to reduce the side blowing melting, the coal powder and the oxygen-enriched gas are sprayed into the molten tank in the molten tank. The oxygen gas is mixed by oxygen and air. , The main technical parameters of the side blowing stove blowing system are: 252kg of pulverized, oxygen 290nm 3 Air 131nm 3 The oxygen concentration is 75.07%, and the temperature of the side blowing furnace is 1450 to 1500 ° C, which can produce 673kg of the slag, 106kg containing phosphorus, 78kg, high temperature flue gas 784 nm. 3 . Among them, the slag component: 3.22% FeO, 0.47% P 2 O 5 0.99% NB 2 O 5 1.21% Reo; phosphorus-containing iron ingredient: 0.1% C, 3.89% p, 0.03% Nb; 27.99% of the smoke containing 27.99%.

[0064] The slag enters the electric furnace for depth reducti...

Embodiment 2

[0067] The ratio of tantalum ore, non-smokeless coal according to the mass ratio is 100: 10 (100 kg of smokeless coal per ton), directly sent to the side blowing furnace feeding opening, in the furnace.

[0068] Turne iron ore and smoke-free coal are put into the side blowing furnace molten tank to reduce the side blowing smelting, the pulverized gas is injected from the side blowing gun into the molten tank is rich in oxygen and air mixing, and the iron is treated. At the time of the mine, the main technical parameters of the side blowing furnace blowing system are: 1,60kg, oxygen 268nm 3 Air 37nm 3 , Oxygen-rich concentration of 89.98%, side blowing furnace fuse tank temperature is 1350 ~ 1400 ° C, can produce 668kg of slag, phosphorus iron water 109kg, dust 75kg, high temperature flue gas 650nm 3 . Among them, the slag component: 2.57% Feo, 0.94% P 2 O 5 1.00% NB 2 O 5 1.22% Reo; phosphorus-containing iron ingredients: 0.13% C, 3.77% P, 0.03% Nb; 27.57% of the soot containing 2...

Embodiment 3

[0072] The ratio of the niobium iron ore and the smokeless coal according to the mass ratio of 100: 40 (400kg per ton of mine plus smokeless coal) is directly sent to the side blowing furnace, and in the furnace.

[0073] Turne iron ore 2 and smoke-free coal are put into the side blower molten tank for reduction side blowing, natural gas and oxygen-enriched gas are sprayed into the molten tank from the side blowing guns, which consists of oxygen and air, and handles each ton At the time, the main technical parameters of the side blowing furnace blowing system are: natural gas 30nm 3 , Oxygen 278nm 3 Air 722nm 3 The oxygen concentration is 42.83%, and the temperature of the side blowing furnace is 1350 ~ 1400 ° C. can produce 605kg of the slag, including phosphorus iron water 172kg, smoke 91kg, high temperature flue gas 1410nm 3 . Among them, the slag component: 3.22% Feo, 0.63% P 2 O 5 1.74% NB 2 O 5 2.12% Reo; phosphorus-containing iron-containing ingredients: 0.11% C, 2.91% P, 0...

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Abstract

The invention provides a comprehensive utilization method of niobite ore. The method for comprehensive utilization of niobite ore includes: step S1, carrying out reducing and side blowing smelting of niobite ore in a side blowing furnace to obtain molten iron, slag and phosphorus-containing flue gas; step S2, performing deep reduction of slag in an electric furnace to obtain Ferroniobium, rare earth-rich slag and electric furnace flue gas. In this application, firstly, niobium-iron ore is reduced and side-blown smelted to realize the separation of phosphorus and iron. The phosphorus content in the obtained molten iron and slag is relatively low, which alleviates the problems caused by the high phosphorus content in raw materials in the subsequent extraction of niobium and rare earth, and reduces Both side-blowing smelting and deep reduction are low-cost smelting methods, so the cost of metal recovery in niobite ore is effectively controlled. At the same time, the waste heat of the side-blowing furnace can be recycled, and the electric energy produced can be used for deep reduction in the subsequent electric furnace, reducing the dependence on external electric energy resources. In the deep reduction stage, iron-containing materials are added as an additional iron source to realize deep reduction and form ferro-niobium.

Description

Technical field [0001] The present invention relates to the field of smelting techniques, and in particular, it relates to a comprehensive utilization method of tantalum iron ore. Background technique [0002] At present, minerals with multiple elements such as niobium, iron, phosphorus and rare earths are generally separated and enriched in a manner using mineralization, reduction and roasting - magnetic separation, reduction of roasting - electric furnace melting, blast furnace reduction or the like. [0003] Usually, the mineralization method needs to be combined, including reselection, magnetic separation, flotation, etc., the mineral processing process is long, the amount of water is large, and the equipment is more equipment, especially the area where the water shortage area and water treatment environmental requirements are high. And the general element recovery is low. The reduction roasting - the magnetic option is to reduce the ruthenium iron ore in a pre-reduction devi...

Claims

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Application Information

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Patent Type & AuthorityPatents(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
OwnerCHINA ENFI ENGINEERING CORPORATION