Method for enriching and recovering niobium, rare earth and titanium from polymetallic ore containing iron, niobium and rare earth

A polymetallic ore and rare earth technology, applied in the field of niobium resource utilization, can solve the problems of low grade, difficult and efficient enrichment of niobium ore phase, and failure to meet the production standards of high-grade ferroniobium. Actionable effect

Active Publication Date: 2021-08-31
CHANGSHA RES INST OF MINING & METALLURGY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the niobium-rich material Nb produced by this type of process 2 o 5 The grade is still low, less than 15%, still unable to meet the needs of high-grade ferro-niobium production
Compared with the process of magnetization roasting / reduction roasting-magnetic separation to remove iron and enrich niobium, the niobium grade of the niobium flotation concentrate obtained by this method can be significantly improved, but the produced niobium-rich slag concentrate (also known as niobium Concentrate) niobium grade is still not up to the production standard of high-grade ferroniobium, the reason is that the concentrated transformation of niobium in the slag to a single high-grade niobium ore phase cannot be realized only through slow cooling and crystallization of slag
Relevant literature shows that there are still many kinds of niobium-containing ore phases in the slag after slow crystallization, including calcinite, niobite, niobium-calcite and yellow green stone, and the dispersed and coexistent niobium ore phases are difficult to be efficiently enriched by flotation. Collection, and thus unable to obtain niobium concentrate for high-grade ferroniobium

Method used

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  • Method for enriching and recovering niobium, rare earth and titanium from polymetallic ore containing iron, niobium and rare earth
  • Method for enriching and recovering niobium, rare earth and titanium from polymetallic ore containing iron, niobium and rare earth
  • Method for enriching and recovering niobium, rare earth and titanium from polymetallic ore containing iron, niobium and rare earth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Enriching recovered from iron-containing niobium, niobium, rare earth metal ores multiple, rare earths, titanium, comprising the steps of:

[0041] (1) the Nb-containing low grade / RE / titanium complex mineral material (e.g., low-grade primary processing of the obtained niobium concentrate which Nb 2 O 5 Content of 2.37%, TiO 2 Content of 4.13%, Fe content of 16.75%, the content of rare earth oxide REO 3.32%, CaO content of 14.03%, SiO 2 Content of 12.75%, MgO content of 10.05%, Al 2 O 3 Content of 1.87%, niobium mainly columbite, iron niobium rutile, aeschynite present form), a flux (limestone chosen embodiment of the present embodiment), reducing agent (in the present embodiment selection coke, containing a C content of 84%) by 100: 20: 4 by mass mixed in a ratio of ingredients;

[0042] (2) Step (1) obtained is put into the melting furnace ingredients, smelting slag and flue gas output; control the melting temperature of 1550 deg.] C, the melting time for 30 min; step ...

Embodiment 2

[0048] Enriching recovered from iron-containing niobium, niobium, rare earth metal ores multiple, rare earths, titanium, comprising the steps of:

[0049] (1) the Nb-containing low grade / RE / titanium complex mineral material (e.g., iron, niobium rare earth concentrate which Nb 2 O 5 Content of 5.40%, TiO 2 Content of 4.29%, Fe content of 35.09%, the content of rare earth oxide REO 4.11%, CaO content of 3.91%, SiO 2 Content of 20.05%, MgO content of 1.17%, Al 2 O 3 Content of 0.34%, niobium mainly columbite, iron niobium rutile, aeschynite present form), a flux (in this embodiment chosen limestone and dolomite mass ratio of 1: 1 mixture), reducing agent (in the present embodiment selection and grain anthracite coal mass ratio of 1: 0.5 mixture, the total average C content of 79%) of 100: 73: 15 mass ratio of the mixed ingredients;

[0050] (2) The step (1) into the resulting ingredients smelting shaft furnace, melting yield an alloy containing iron, slag, and flue gas; control t...

Embodiment 3

[0056] Enriching recovered from iron-containing niobium, niobium, rare earth metal ores multiple, rare earths, titanium, comprising the steps of:

[0057] (1) the Nb-containing low grade / RE / titanium complex mineral material (e.g. niobium iron ore which Nb 2 O 5 Content of 3.52%, TiO 2 Content of 4.29%, Fe content of 14.03%, the content of rare earth oxide REO 1.50%, CaO content of 14.03 percent, of SiO 2 Content of 12.75%, MgO content of 10.05%, Al 2 O 3 Content of 1.87%, niobium mainly, rutile niobium iron, niobium is present in the form of iron aeschynite), slag forming agent (chosen embodiment of the present embodiment dolomite), reducing agent (Powder Coal embodiment of the present embodiment, C content of 89%) by 100: 54: 6 mass ratio of the mixed ingredients;

[0058] (2) The step (1) resulting into the converter ingredients smelting, smelting slag and flue gas output; control the melting temperature of 1550 deg.] C, the melting time for 30 min; step by controlling (1) t...

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Abstract

The invention discloses a method for enriching and recovering niobium, rare earth and titanium from polymetallic ores containing iron, niobium and rare earths, comprising the following steps: adding polymetallic ores containing iron, niobium and rare earths, slagging agent and reducing agent according to 100:(2~100):(0~30) mass ratio for mixing ingredients; put the ingredients into the smelting furnace for smelting, and produce slag and flue gas; control the composition of the ingredients and the oxygen potential in the furnace, and monitor The composition of the smelting output, the recovery rate of iron to adjust the oxygen potential and CaO / SiO in the furnace 2 Mass ratio to a suitable range, CaO / SiO 2 The mass ratio is 2.5-6.0; the output slag is discharged into the slag bag, cooled and crystallized; the obtained slag is crushed and then finely ground to obtain slag powder; the obtained slag powder is processed by mineral processing to obtain high-grade niobium-containing and rare earth , Titanium compound concentrate. The method of the invention has the advantages of simple steps, convenient operation and good economic benefits, and can obtain composite concentrates for comprehensively recovering various valuable metals.

Description

Technical field [0001] The present invention belongs to the field of niobium resource utilization, and specifically, a method of comprehensive recovery of niobium, rare earth, and titanium in low-quality bismuth polymetallic mine. Background technique [0002] Niobium is an important strategic metal, widely used in steel, aerospace, electronic information, etc., is an important strategic resource for national economic and defense construction. Since 2005, my country has become the world's largest tantalum cancer, but my country's niobium demand is extremely dependent on import, and the external dependency exceeds 97%. However, in fact, my country's niobium resources is not short, including Baotou Baiyun, Tie--Rare Earth (Fe-NB-ree) multi-metal mine as the largest niobium resource base in my country, which has been proven NB 2 O 5 The reserves reached 2.14 million tons, and the vision reserves were estimated to exceed 6.6 million tons. Therefore, it is important to achieve economi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B59/00C22B34/12C22B34/24C22B1/00C21C5/36C21B11/10C21B11/02C21B11/06
CPCC21B11/02C21B11/06C21B11/10C22B1/00C22B34/1209C22B34/24C22B59/00Y02P10/143Y02P10/20
Inventor 陈雯肖松文任国兴彭泽友李家林周瑜林
Owner CHANGSHA RES INST OF MINING & METALLURGY
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