Method for comprehensively utilizing paigeite by rotary hearth furnace iron bead process

A technology of boron ore and rotary hearth furnace, applied in the field of comprehensive utilization of boron ore in rotary hearth furnace, which can solve the problems of low grade, inapplicability, and incomplete separation of boron and iron

Inactive Publication Date: 2011-08-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the method yield is low, and the separation of boron and iron is not very thorough, and B in the boron fine

Method used

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  • Method for comprehensively utilizing paigeite by rotary hearth furnace iron bead process
  • Method for comprehensively utilizing paigeite by rotary hearth furnace iron bead process
  • Method for comprehensively utilizing paigeite by rotary hearth furnace iron bead process

Examples

Experimental program
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Effect test

Embodiment 1

[0063] B 2 o 3 6.90% boron ore ore powder, weight of boron ore weight 20% of coal powder and weight of boron ore and coal powder weight sum of 2% binder are transported to the mixer through the belt to mix, and adjust the mixing 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 40×30×21mm pillow-shaped ellipsoid. After the raw balls are dried, they are laid on the carbonaceous refractory material of the rotary hearth furnace in a single layer, and a layer of carbon powder with a thickness of 3 to 5 mm is laid on the carbonaceous refractory material in advance. The temperature in the rotary hearth furnace is 1400-1450°C, the residence time of the pellets in the rotary hearth furnace is 10-20 minutes, and then the pellets are discharged from the discharge port by the discharge machine. The discharged products are sent to ...

Embodiment 2

[0071] B 2 o 3 5.26% boronite ore powder, 20% coal powder by weight of boronite weight, 2% binder by weight of boronite and coal powder weight sum and 4% by weight of boronite and coal powder weight sum CaF 2 It is transported to the mixer through a belt for mixing, and the moisture content of the mixed material is adjusted 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 40×30×21mm pillow-shaped ellipsoid. After the raw balls are dried, they are laid on the carbonaceous refractory material of the rotary hearth furnace in a single layer, and a layer of carbon powder with a thickness of 3 to 5 mm is laid on the carbonaceous refractory material in advance. The temperature in the rotary hearth furnace is 1400-1450°C, the residence time of the pellets in the rotary hearth furnace is 10-20 minutes, and then the pellets are discharged from the ...

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Abstract

The invention relates to a method for comprehensively utilizing paigeite by a rotary hearth furnace iron bead process, belonging to the field of iron making. The method for comprehensively utilizing paigeite is a method for separating and concentrating boron and iron in paigeite, and is used for exploiting and utilizing paigeite. The method for comprehensively utilizing paigeite is characterized by taking paigeite powdered ore, a carbonaceous reducing agent, a binding agent and additives as raw materials, and comprising the processes of proportioning, evenly mixing, agglomerating, reducing and melting by a rotary hearth furnace, breaking, magnetically separating and the like for preparing iron beads with the boron element content of 0.05-0.1% and boron-rich slag with the B2O3 content of 12-20%. The produced iron beads can be used as a raw material for electric steelmaking or converter steelmaking, and the boron-rich slag can replace ascharite ore for producing boric acid or borax, thereby fully utilizing the boron resource and the iron resource, and realizing comprehensive utilization of the paigeite. The method can meet the requirements of the boron industry and the iron and steel industry, and has better social and economic benefits.

Description

technical field [0001] The invention belongs to the field of ironmaking, and relates to a method for comprehensively utilizing boronite in a rotary hearth furnace, which is used for the development and utilization of boronite. Background technique [0002] Boron is distributed in the earth's lithosphere, hydrosphere and meteorite circle in a dispersed state, and is one of the most important elements in the earth's crust. Determined by the physical and chemical properties of boron, boron is widely used in chemical industry, medicine, light industry, textile, electronics, metallurgy, building materials, national defense and military industry, cutting-edge science, agriculture and other departments. my country's boron ore reserves are 27 million tons (in B 2 o 3 With the rapid development of the national economy, the demand for boric acid and borax in my country is increasing year by year, and more than half of them need to be imported at present. The main reason for the ins...

Claims

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Application Information

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IPC IPC(8): C21B11/00
Inventor 薛庆国王广王静松丁银贵
Owner UNIV OF SCI & TECH BEIJING
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