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Method for separation production of rare earth ferrosilicon alloy with rotary hearth furnace

A rare earth ferrosilicon alloy and rotary hearth furnace technology, which is applied in the direction of rotary drum furnace, furnace, electric furnace, etc., can solve the problems of increasing the environment, burdening production costs, increasing energy consumption of submerged arc furnaces, etc.

Active Publication Date: 2017-06-13
北京安康科创节能环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex composition of rare earth ores, they are generally symbiotic with other metal ores. Many rare earth ores in northern my country are symbiotic deposits of rare earth, iron and niobium. and other impurities, and the reduction of metallic iron in an environment above 1700 °C will not only cause the charge to run smoothly, but also greatly increase the energy consumption of the submerged arc furnace, and the means of increasing the reducing dose such as coke will bring a great burden to the environment and higher production costs
It is difficult to smelt traditional iron-containing rare earth ores as raw materials for rare earth ferrosilicon alloys
[0003] After years of development, the rotary hearth furnace has become a common equipment for the production of pearl iron, sponge iron and metallized pellets. The rotary hearth furnace has the characteristics of low cost and high environmental friendliness as equipment for processing complex rare earth iron ore. However, the rotary hearth furnace There is no relevant report on the whole process of processing rare earth ore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for separating and producing rare earth ferrosilicon alloy in a rotary hearth furnace comprises the following steps:

[0027] (1) Raw material processing, the raw material adopts iron-containing rare earth raw ore and coal powder, first mixes described iron-containing rare earth raw ore and coal powder according to the weight portion of 8.2:1.8 and then joins in a ball mill for ball milling, and the iron-containing rare earth The raw materials and pulverized coal are ball-milled to less than 200 mesh and then exit the ball mill. The ball-to-material ratio of the ball mill is 25:1, and the ball milling time is 19 hours. Then add the binding agent of 1.6% of the total mass of the mixed powder, the additive of 0.5% of the total mass of the mixed powder and the water of 6% of the total mass of the mixed powder in the mixed powder, mix in the mixer; then Transfer the mixed powder after mixing to a pelletizer to make pellets, and obtain mixed pellets after drying; th...

Embodiment 2

[0039] A method for separating and producing rare earth ferrosilicon alloy in a rotary hearth furnace comprises the following steps:

[0040] (1) Raw material processing, the raw material adopts iron-containing rare earth raw ore and coal powder, first mixes described iron-containing rare earth raw ore and coal powder according to the weight portion of 8.5:1.6 and then joins in a ball mill for ball milling, and the iron-containing rare earth The raw materials and pulverized coal are ball-milled to less than 200 mesh and then go out of the ball mill, and then add 2.5% of the total mass of the mixed powder to the binder, 0.5% of the total mass of the mixed powder and 6.2% of the total mass of the mixed powder After mixing the water, mix it in the mixer; then transfer the mixed powder after mixing to the pelletizer to make pellets, and get the mixed pellets after drying; the additive is Na 2 CO 3 . The binder is a mixture of bentonite and soybean powder.

[0041] The coal powd...

Embodiment 3

[0051] A method for separating and producing rare earth ferrosilicon alloy in a rotary hearth furnace comprises the following steps:

[0052] (1) raw material treatment, the raw material adopts iron-containing rare earth raw ore and coal powder, first mixes described iron-containing rare earth raw ore and coal powder according to the weight portion of 8.8:1.5 and then joins in a ball mill for ball milling, and the iron-containing rare earth The raw materials and coal powder are ball-milled to less than 200 mesh and then exit the ball mill. The ball-to-material ratio of the ball mill is 33:1, and the ball milling time is 20 hours.

[0053] Then add the binding agent of 2.6% of the total mass of the mixed powder, the additive of 0.66% of the total mass of the mixed powder and the water of 8% of the total mass of the mixed powder in the mixed powder, mix in the mixer; The moisture content of the mixture in the mixer was 8.1%. Then transfer the mixed powder after mixing to a pell...

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PUM

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Abstract

The invention relates to a method for separation production of rare earth ferrosilicon alloy with a rotary hearth furnace. The method includes the steps of 1), raw material treatment; 2), material distribution for the rotary hearth furnace; 3), reduction of melting points for the rotary hearth furnace; 4), secondary briquetting; 5), rear earth ferrosilicon melting and the like. By the arrangement of the specific steps and movement of the steps, overall efficiency in producing the rear earth ferrosilicon alloy by the aid of iron-containing rare earth ores is improved, and production cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of rare earth ore utilization, and in particular relates to a method for separating rare earth from iron-containing rare earth raw ore and then smelting rare earth ferrosilicon alloy. Background technique [0002] Rare earth ferrosilicon alloy is a very important additive in steel production. It can deoxidize, desulfurize and add rare earth in the steelmaking process. As the output of high value-added steel increases year by year, the demand for rare earth ferrosilicon alloy is also increasing, and There is also an increasing demand for rare earth content in rare earth ferrosilicon alloys. The traditional smelting of rare earth ferrosilicon alloys generally adopts ore-thermal method and carbon-thermal method. The ore-thermal method is mostly used in industrial production, which mainly uses lime as a solvent and ferrosilicon as a reducing agent to reduce rare earth ores, and produces rare earth ferrosilicon alloys by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/08C21C5/52C22B1/243C22B1/244C22B5/10C22B59/00C21C5/46B22F1/00B22F9/04
CPCC21B13/08C21C5/4606C21C5/4653C21C5/52C22B1/2406C22B1/243C22B1/244C22B5/10C22B59/00B22F9/04B22F2009/041B22F1/10Y02P10/20
Inventor 佘雪峰
Owner 北京安康科创节能环保科技有限公司
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