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

Preparation technique of iron ore pellets

A preparation process and a technology for iron ore pellets, applied in the field of preparation technology of iron ore pellets, can solve the problems of difficulty in fully expanding montmorillonite, short expansion time, and difficulty in functioning, and improve the quality of green pellets, improve strength, The effect of improving strength

Inactive Publication Date: 2013-02-20
CENT SOUTH UNIV
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is less water in the pelletizing raw material, bentonite absorbs water, and the swelling time is short, and it is difficult for montmorillonite to fully develop and interact with iron concentrate particles, and even some coarse-grained bentonite fails to effectively absorb water and expand with montmorillonite, making it difficult to play a role

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
  • Preparation technique of iron ore pellets
  • Preparation technique of iron ore pellets
  • Preparation technique of iron ore pellets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Example 1: The ratio of bentonite, water, and CMC is 100:500:2 to prepare fibrous bentonite. When the total amount of bentonite is 1.1% (the amount of pre-prepared bentonite is 1.0%) to strengthen the ball, the compression resistance of the raw ball The strength, drop strength and burst temperature are 14.1N / piece, 3.4 times / 0.5m and 540°C, respectively, and the compressive strengths of the preheated balls and roasted balls obtained by preheating at 900°C for 15 minutes and roasting at 1280°C for 10 minutes are 408N / and 2700N / piece.

Embodiment 2

[0039] Example 2: The ratio of bentonite, water, and CMC is: 100:500:2 to prepare fibrous bentonite. When the total amount of bentonite is 1.25% (the amount of pre-prepared bentonite is 1.0%) to strengthen the pelletization, the compression resistance of the raw ball The strength, drop strength and burst temperature are 13.4N / piece, 4.4 times / 0.5m and 548°C respectively, and the compressive strengths of preheated balls and roasted balls obtained by preheating at 900°C for 15 minutes and roasting at 1280°C for 10 minutes are respectively 538N / and 3100N / piece.

Embodiment 3

[0040] Example 3: The ratio of bentonite, water, and CMC is: 100:500:2 to prepare fibrous bentonite. When the total amount of bentonite is 0.77% (the amount of pre-prepared bentonite is 0.5%) to strengthen the pelletization, the compression resistance of the raw ball The strength, drop strength and burst temperature are 10.4N / piece, 2.9 times / 0.5m and 590°C respectively, and the compressive strengths of preheated balls and roasted balls obtained by preheating at 900°C for 15 minutes and roasting at 1280°C for 10 minutes are respectively 359N / and 2530N / piece.

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 discloses a preparation technique of iron ore pellets, which comprises the following steps: (1) adding 0.5-1% of bentonite to iron concentrate, evenly mixing to obtain a mixture of which the water content is 1-3% lower than the propery pelletizing water content, pelletizing with a disk pelletizer or drum pelletizer, and when seed pellets grow into pellets with the diameters of 8mm or so, spraying fiberized bentonite in the pellet growth region to continue pelletization until qualified green pellets with the diameters of 12-16mm are obtained; and (2) the fiberized bentonite is prepared by the following steps: bentonite and a CMC (carboxymethyl cellulose) solution are mixed, so that smectite molecules in the bentonite sufficiently absorb water and expand under the actions of water molecules and CMC molecules under the action of mechanical stirring force, and spread to be compounded with the CMC molecules, thereby preparing the fiberized bentonite. The fiberized bentonite is atomized and sprayed to the pellet growth region to efficiently act on the iron concentrate granule surface and fully display the binding action, thereby obviously enhancing the quality of the green pellets and the strength of the preheated pellets and roasted pellets.

Description

technical field [0001] The invention relates to a preparation process of iron ore pellets, in particular to a method of compounding fibrous bentonite prepared by adding CMC under the mechanical force of a stirring mill, and atomizing and spraying the bentonite on the iron ore concentrate pellet growth area The pelletizing process strengthens the role of bentonite in the preparation of pellets and significantly improves the quality of green pellets, the strength of preheated pellets and roasted pellets and the preparation process of iron ore pellets. Background technique [0002] Due to its good metallurgical properties and the advantages of improving the air permeability of the blast furnace charge column, iron ore pellets are considered to be a high-quality charge necessary for the optimization of the blast furnace charge structure. Modern blast furnace ironmaking is developing towards the goals of high production, low consumption, and long life. The use and role of pellets...

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 Applications(China)
IPC IPC(8): C22B1/243
Inventor 黄柱成姜涛范晓慧刘赞伟李光辉郭宇峰杨永斌张元波李铁辉
Owner CENT SOUTH UNIV
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com