Magnetization roasting technique system for refractory iron ore powder and roasting technology

A technology of magnetization roasting and process system, which is applied in the fields of chemical industry and metallurgy, and can solve the problems of no recovery or full recovery, and insufficient utilization of the latent heat of roasting tail gas.

Active Publication Date: 2009-03-18
深圳市中科九台资源利用科技产业股份有限公司
View PDF7 Cites 65 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The iron ore magnetization roasting process is an energy-consuming process. The energy utilization efficiency of the whole process determines the economy of the process. The existing process only uses the sensible heat of the roasting tail gas, and does...

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
  • Magnetization roasting technique system for refractory iron ore powder and roasting technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] In the following, the present invention will be further described by taking the heat exchange of the three-stage cyclone preheater as an example in the magnetization roasting process of refractory iron ore powder.

[0049] Please refer to the process system of the present invention shown in FIG. 1 . The gas is divided into two paths after being compressed by the gas compressor 12. One path enters the fluidized cooler 9 through the air inlet at the bottom of the fluidized cooler 9 for fluidized roasting ore, and then passes through the top of the fluidized cooler. The gas outlet enters the circulating fluidized bed reactor riser 8 through the pipeline; the other way directly enters the circulating fluidized bed reactor riser 8 from the air inlet at the bottom of the circulating fluidized bed reactor riser 8 and iron ore After the stone powder undergoes a magnetization roasting reaction, the gas-solid separation is initially achieved through the cyclone dust collector on ...

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 belongs to the fields of chemical engineering and metallurgy and in particular relates to a process system which adopts a circulating fluid bed to carry out magnetization roasting on limonite, siderite, sedimentary hematite and other refractory iron ore powder bodies. The process system adopts a high-efficiency low-resistance reactor of the circulating fluid bed to carry out the magnetizing roasting to the iron ore powder body; firstly, roasted tail gas in a combustion chamber releases latent heat of unreacted reducing gas through combustion; secondly, the roasted tail gas exchanges heat with the cold iron ore powder body through a multilevel cyclone preheater to reclaim heat; and finally a fluidizing cooler is adopted to reclaim sensible heat of high-temperature roasting ore. The process system has the advantages of high magnetizing roasting efficiency and full heat reclaiming and utilization in the roasting process and the like, can reduce energy consumption of the refractory iron ore powder body in the process of magnetizing roasting and improve the economical efficiency of the refractory iron ore in the process of magnetizing roasting.

Description

technical field [0001] The invention belongs to the fields of chemical industry and metallurgy, and in particular relates to a process system and roasting process for magnetizing and roasting refractory iron ore powders such as limonite, siderite and sedimentary hematite by using a circulating fluidized bed. Background technique [0002] 97% of my country's iron ore reserves are lean ore, including nearly 10 billion tons of refractory iron ore including limonite, siderite, and sedimentary hematite. Even if the beneficiation process combining gravity separation, flotation and strong magnetic separation is adopted, it is difficult to achieve effective separation. It has been proved to be an effective separation method for the above-mentioned minerals by reduction roasting (also known as magnetization roasting) to convert the above-mentioned weakly magnetic iron oxides into strong magnetic artificial magnetite, followed by weak magnetic separation. The research and development ...

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
IPC IPC(8): C22B1/10
Inventor 朱庆山谢朝晖李洪钟王永安陶玲
Owner 深圳市中科九台资源利用科技产业股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap