Concentration method for iron and boron in low-grade paigeite

A boronite, low-grade technology, applied in chemical instruments and methods, boron/boride, solid separation, etc., can solve problems such as blast furnace lining erosion, blast furnace productivity decline, and limited application range

Inactive Publication Date: 2008-04-09
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Blast furnace smelting is used for separation. Although the separation effect of boron and iron is better, the production capacity of the blast furnace is reduced, the coke consumption is high, the lining of the blast furnace is severely eroded, and the product has a high sulfur content and a limited range of use. More importantly, the B-rich slag 2 o 3 The activity is low and cannot meet the requirements of carbon-soda borax production, so it has not been able to achieve long-term stable industrial production so far

Method used

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  • Concentration method for iron and boron in low-grade paigeite

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Experimental program
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Effect test

Embodiment 1

[0021] After the calcined low-grade boron ore is pulverized by a hammer mill, it is sent to a ball mill for grinding until it can pass through a 0.096mm sieve, and the coke is also ground until it can pass through a 0.096mm sieve, and 10% of the weight of the ore is added. Coke powder, Mix it on the mixer and send it to the distribution bin through the belt, and put it into the rotary hearth furnace with a material layer thickness of 2-3cm. The flow time of the mineral material in the furnace is 30 minutes, and the mineral material slowly flows through the rotary hearth The bottom furnace flows into the discharge port, and is sent to the magnetic separation plant for magnetic separation after cooling and grinding. After separation, the magnetic material is iron powder, and the non-magnetic material is boron concentrate. Its composition is shown in Table 1:

[0022] Table 1

[0023] sample number

[0024] It can be seen from the above table that with the increase of ...

Embodiment 2

[0026] After the calcined low-grade boron ore is pulverized by a hammer mill, it is sent to a ball mill for grinding until it can pass through a 0.096mm sieve, and the coke is also ground until it can pass through a 0.096mm sieve, and 10% of the weight of the ore is added. Coke powder, Mixed on the mixer and sent to the pelletizing workshop by the belt for drying of the balls. The strength of the balls is that they will not be pulverized in the rotary hearth furnace. Roasting in the hearth furnace for 20 minutes, the discharge material is cooled and then ground and then magnetically separated. The grades of iron concentrate powder and boron concentrate powder after selection are shown in Table 2:

[0027] Table 2

[0028] sample number

[0029] From the above two tables, it can be seen that the grades of iron concentrate powder and boron concentrate powder are not much different after roasting, but the roasting time is shorter than that of powder ore roasting directl...

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Abstract

An enriched method of iron and boron by using low-grade ferroboron ore pertains to the field of iron-smelting, in particular to an enriched method of iron and boron by using low-grade ferroboron ore, which applies for the exploitation and use of low-grade ferroboron ore. The method is characterized in that the low-grade ferroboron ore of boron content between 5 percent and 10 percent is taken as raw material and is calcined, cracked, grinded, mixed with solid reducer, baked and magnetic-picked to get the boron concentrate power of boron content between 12 percent and 15 percent and the iron concentrate power of iron content between 60 percent and 90 percent. Consequently, the limited resource of boron and iron is sufficiently used, which has great significance for both the society and economic benefit.

Description

technical field [0001] The invention belongs to the field of ironmaking, and relates to a method for enriching iron and boron in low-grade boron-iron ore, which is used for the development and utilization of low-grade boron-iron ore. Background technique [0002] my country is relatively rich in boron resources. Calculated by diboron trioxide, the total amount of resources is nearly 1 billion tons, but only about one quarter can be used for industry. At present, the original available boron resources in my country are close to exhaustion. It has been unable to meet the needs of the development of the national economy for boron chemical products. "Food shortage" is an unavoidable and important problem faced by my country's boron industry. Although the development and utilization of low-grade boron-iron ore with the largest reserves has recently achieved considerable development, However, due to reasons such as technology, cost, and benefit, it has not yet achieved industrializa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B1/14C22B1/02B03C1/02C01B35/02
Inventor 张建良蔡海涛
Owner UNIV OF SCI & TECH BEIJING
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