Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Refractory poor iron ore pulsating fluidized bed magnetizing roasting device and roasting method

A magnetic roasting and fluidized bed technology, which is applied in metallurgy and chemical industry, can solve the problem of wide distribution of iron ore powder residence time, reduce reaction time and roaster reactor volume, and reduce total heat and mass transfer resistance , The effect of saving fixed investment

Inactive Publication Date: 2013-01-23
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Aiming at the shortcomings of the existing fluidized bed magnetization roasting, the present invention proposes a process and device for blast furnace gas, coke oven gas and coal gasification gas combustion coupling fluidized bed magnetization roasting technology - Rick tube type pulsating fluidized bed magnetization Roasting device and roasting method to effectively destroy and suppress undesirable phenomena such as "channeling", "dead zone" and "short circuit" in fluidized bed magnetization roasting and excessively wide residence time distribution of iron ore powder in the reactor The problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Refractory poor iron ore pulsating fluidized bed magnetizing roasting device and roasting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A pulsating fluidized bed magnetic roasting method for refractory lean iron ore, the method is coal gas, for example, the calorific value is greater than 850Kcal / Nm 3 The blast furnace gas, coke oven gas or coal gasification gas is compressed by the gas compressor 17 and preheated by the iron concentrate cooler 14, and the preheated air from the gas-gas heat exchanger 9 passes through the acoustic decoupling chamber 4 together into the pulsating fluidized bed for partial combustion, and the heat generated makes the temperature of the magnetization roasting reactor reach 500°C to 950°C. In this range, the weakly magnetic Fe 2 o 3 is rapidly reduced to strongly magnetic Fe 3 o 4 , and then high-quality iron concentrate (grade > 70%, iron recovery > 90%) can be obtained by magnetic separation in a weak magnetic field. After the reaction, the high-temperature roasted ore undergoes gas-solid separation through the cyclone separator 5 and enters the iron concentrate cooler...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a refractory poor iron ore pulsating fluidized bed magnetizing roasting device and a refractory poor iron ore pulsating fluidized bed magnetizing roasting method. Iron ore powder is magnetized and roasted by adopting a pulsating fluidized bed formed by direct coupling of Rick tube type pulsating combustion and a fluidized bed. The iron ore powder is preheated by an ore heater (6) in a bin (7) and then delivered to a roasting furnace (1), the roasting exhaust is cooled by the ore heater (6) and then delivered to a burner (8) and burnt, and the burnt exhaust is cooled by a gas-gas pre-heater (9), delivered to a bag-type dust remover (10) and then discharged to the atmosphere. Sensible heat of high-temperature iron ore concentrate is reclaimed by an ore cooler (14). The device has the advantages of simple system, compact structure, low energy consumption, reduced resistance, short roasting time and the like; and by using the device and the method, poor phenomena of channeling, dead zone, short circuit and the like of common fluidized bed magnetizing roasting and the problem of over wide residence time distribution of a reactor are effectively solved, and the roasting quality and the roasting efficiency are improved.

Description

technical field [0001] The invention relates to a pulsating fluidized bed magnetization roasting method for refractory iron oxide ore powder and a device using the method, belonging to the fields of chemical industry and metallurgy. Background technique [0002] China is a country rich in iron ore resources, but most of them are low-grade (average about 30%) complex and refractory iron ore (including limonite, hematite, etc.). It is difficult to effectively separate these complex and refractory iron ores by separation, flotation and their combined processes. In recent years, due to the rise in iron ore prices and the tight supply of domestic iron ore concentrates, a large number of low-grade iron ore resources that cannot meet the requirements of the iron and steel industry have not been effectively utilized. Therefore, it is necessary to develop an effective low-grade iron ore separation method with the device. [0003] Magnetization roasting has been proven to be feasibl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/10
Inventor 汤根土胡万起李竹川王晓岚
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products