Method for separating and enriching iron and rare earth in rare earth crude ore containing iron

A technology for separation and enrichment of rare earths, which is applied in the field of ironmaking and can solve problems such as difficulty in enrichment and waste of resources

Inactive Publication Date: 2011-09-28
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for iron-containing rare earth raw ores, rare earth minerals and other minerals are closely intercalated, and it is difficult to enrich them by ordinary methods. Although iron concentrates and rare earth concentrates can be obtained through weak magnetic-strong magnetic-flotation processes, the iron recovery rate is 70%, rare earth recovery rate is only 10%, resulting in a great waste of resources

Method used

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  • Method for separating and enriching iron and rare earth in rare earth crude ore containing iron
  • Method for separating and enriching iron and rare earth in rare earth crude ore containing iron
  • Method for separating and enriching iron and rare earth in rare earth crude ore containing iron

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Will contain 30.20% iron, containing RE 2 o 3 5.50% raw ore powder, 13% coal powder by weight of iron-containing rare earth raw ore, and 2% binder by weight of the total of iron-containing rare earth raw ore and coal powder are transported to the mixer through a belt for mixing, and the mixing is adjusted. Homogenize moisture 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. Lay 3-5mm thick carbon powder on the refractory material at the bottom of the rotary hearth furnace, and evenly spread the dried pellets on the carbon powder, generally 1-2 layers. The temperature in the rotary hearth furnace is 1400-1450°C, the residence time of the pellets in the rotary hearth furnace is 9-20 minutes, and then the pellets are discharged from the discharge port by the discharge machine. The discharged product...

Embodiment 2

[0060] will contain RE 2 o 3 6.56% iron-containing rare earth raw ore powder, 12% iron-containing rare earth raw ore weight coal powder, 2% iron-containing rare earth raw ore additive MgO, and 2% binder of the total weight of iron-containing rare earth raw ore and coal powder It is transported to the mixer through a belt for mixing, and the moisture content of the mixed material is adjusted to 8%. 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. Lay 3-5mm thick carbon powder on the refractory material at the bottom of the rotary hearth furnace, and evenly spread the dried pellets on the carbon powder, generally 1-2 layers. The temperature in the rotary hearth furnace is 1400-1450°C, the residence time of the pellets in the rotary hearth furnace is 9-20 minutes, and then the pellets are discharged from the disch...

Embodiment 3

[0068] will contain RE 2 o 3 5.95% iron-containing rare earth raw ore powder, 12% iron-containing rare earth raw ore weight coal powder, 5% iron-containing rare earth raw ore additive MgO and 2% binder of the total weight of iron-containing rare earth raw ore and coal powder It is transported to the mixer through a belt for mixing, and the moisture content of the mixed material is adjusted to 9%. 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. Lay 3-5mm thick carbon powder on the refractory material at the bottom of the rotary hearth furnace, and evenly spread the dried pellets on the carbon powder, generally 1-2 layers. The temperature in the rotary hearth furnace is 1400-1450°C, the residence time of the pellets in the rotary hearth furnace is 9-20 minutes, and then the pellets are discharged from the discha...

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Abstract

The invention discloses a method for separating and enriching iron and rare earth in rare earth crude ore containing iron, which belongs to the field of ironmaking, relates to a method for separating and enriching rare earth and iron in the rare earth crude ore containing iron and is used for the comprehensive utilization of the rare earth crude ore containing iron. The method is characterized inthat: the rare earth crude ore containing iron, a carbon-containing reducer, a bonding agent and an additive are used as raw material; and the process comprises the steps of ore grinding, material preparation, uniform mixing, agglomeration, reducing and melt extraction, crushing and magnetic separation; and thus, beaded iron and rare earth enriched slag can be prepared. The produced beaded iron can be used as a raw material for steelmaking in an electric furnace or a converter; the rare earth enriched slag can be used for producing rare earth silicoferrite or dressed to produce rare earth concentrate; and thus, the iron resources and rare earth resources can be fully utilized, and the rare earth crude ore containing iron can be comprehensively used. The method can satisfy the needs of steel industry and rare earth industry and can create great social and economic benefit.

Description

technical field [0001] The invention belongs to the field of ironmaking, and relates to a method for comprehensively utilizing iron-containing rare earth raw ores in a rotary hearth furnace, which is used for the development and utilization of iron-containing rare earth raw ores. Background technique [0002] Rare earth refers to lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium in the periodic table of chemical elements (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), scandium (Sc) and yttrium (Y) 17 elements. Rare earth deposits generally contain a variety of useful components, among which rare earths, niobium, and iron are the main comprehensive recovery objects. Many large niobium deposits, iron deposits, phosphorus deposits and nepheline deposits in the world are also rare earth deposits. [0003] The Baiyan Obo Iron Mine is a typical uni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B11/00C22B59/00
Inventor 王静松丁银贵薛庆国王广马赛
Owner UNIV OF SCI & TECH BEIJING
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