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

Method for manufacturing alkaline magnesium-rich pellet ore

A technology of high-magnesium pellets and a manufacturing method, applied in the direction of improving process efficiency, etc., to achieve the effects of improving high temperature performance, avoiding strength deterioration, and saving flux costs

Active Publication Date: 2015-11-11
SHANXI TAIGANG STAINLESS STEEL CO LTD
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of alkaline high-magnesium pellets requires the addition of a large amount of dolomite, or magnesite + limestone, etc., but due to the high proportion of addition, and the decomposition of the flux during the roasting process, CO2 escapes. It will have a great impact on the strength of pellets, and it is difficult to produce
Moreover, the purchase of flux requires funds, which will increase the cost of pellet production

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The specific steps for preparing alkaline magnesium-containing pellets by utilizing waste magnesia-calcium bricks in this method are as follows:

[0048] Ⅰ Pretreatment of recycled waste magnesia-calcium bricks

[0049] a first break

[0050] Use a jaw crusher to crush the waste magnesia-calcium bricks first, then sieve them with a sieve with a sieve hole of 20mm, and return the oversize to the crusher for re-crushing;

[0051] b fine grinding

[0052] Part of the undersize (≤20mm) enters the R-type pendulum mill to be ground into magnesia-calcium brick powder, the grinding particle size: -0.074mm is 90.5%, and then transported into the ore blending bin by a sealed tanker;

[0053] Ⅱ ingredients

[0054] Batching with iron concentrate etc.

[0055] Iron concentrate powder, bentonite, coal powder and ground magnesia-calcium brick powder are prepared according to the following parts by weight to form a batch. The specific ratio is:

[0056] 5.5 parts of magnesia ca...

Embodiment 2

[0073] The specific steps of the preparation of alkaline high-magnesium pellets of the present embodiment are as follows:

[0074] Ⅰ Pretreatment of recycled waste magnesia-calcium bricks

[0075] a first break

[0076] Use a jaw crusher to crush the waste magnesia-calcium bricks first, then sieve them with a sieve with a sieve hole of 20mm, and return the oversize to the crusher for re-crushing;

[0077] b fine grinding

[0078] Part of the undersize (≤20mm) enters the R-type pendulum mill to be ground into magnesia-calcium brick powder, the grinding particle size: -0.074mm is 90.8%, and then transported into the ore blending bin by a sealed tanker;

[0079] Ⅱ ingredients

[0080] Batching with iron concentrate etc.

[0081] Iron concentrate powder, bentonite, coal powder and ground magnesia-calcium brick powder are prepared according to the following parts by weight to form a batch. The specific ratio is:

[0082] 6.6 parts of magnesium calcium brick powder

[0083] ...

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 method for manufacturing alkaline magnesium-rich pellet ore. The method comprises the steps of I pretreatment of recycled waste magnesia-calcium bricks, wherein a, primary breaking is carried out, and the waste magnesia-calcium bricks are broken into magnesia-calcium brick blocks; b, fine grinding is carried out, and the magnesia-calcium brick blocks are ground into magnesia-calcium brick powder; II batching, wherein iron concentrate powder and the magnesia-calcium brick powder are batched into batch mixtures, and 5.5-6.6 parts of the magnesia-calcium brick powder, 100 parts of the iron concentrate powder, 0.5-1 part of pulverized coal and 1.7 parts of bentonite are adopted according to the ratio; III pretreatment of the batch mixtures, wherein roll grinding is carried out on the batch mixtures; IV mixing, wherein the batch mixtures obtained through roll grinding are mixed; V pelletizing and screening, wherein mixed materials are pelletized and screened into qualified green pellets; VI drying, preheating and calcination, wherein the qualified green pellets are calcinated into pellet ore; VIII cooling, wherein the pellet ore is cooled to obtain the alkaline magnesium-rich pellet ore. The alkaline magnesium-rich pellet ore is produced through the waste magnesia-calcium bricks, the quaternary alkalinity of the pellet ore can be above 1.15%, and MgO is larger than or equal to 3.8%.

Description

Technical field: [0001] The invention relates to a method for recycling waste magnesia-calcium bricks from iron and steel plants to produce alkaline high-magnesium pellets, in particular to a method for manufacturing alkaline high-magnesium pellets. Background technique: [0002] In order to improve the metallurgical properties of the pellets, the production of magnesium-containing pellets will be considered. Because the high proportion of magnesium-containing flux will affect the contact between hematite particles, cause high roasting temperature, and affect the strength of pellets. Therefore, the MgO content in pellets is generally controlled within 2%. To continue to increase the MgO content in the pellets, it is necessary to consider adding some materials that are conducive to the formation of low-melting point substances, which will increase the calcium in the pellets, so that calcium ferrite minerals will be formed in the pellets. The production of alkaline high-mag...

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): C22B1/00C22B1/24C22B1/02
CPCY02P10/20
Inventor 贺淑珍冯焕林蔡湄夏范建军张华李昊堃
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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