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

Manufacturing method of green pellets

A manufacturing method and technology of green pellets, applied in the field of green pellet manufacturing, can solve problems such as difficult dehydration of green pellets, easy cracking, and poor quality of green pellets, so as to reduce the probability of cracking, improve quality, and improve thermal performance Effect

Active Publication Date: 2018-11-20
SHANXI TAIGANG STAINLESS STEEL CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of adding starch as a medicament to the pulp, it is difficult to dehydrate the green pellets after the iron concentrate is pelletized, and it is easy to crack when dried at high temperature, and the quality of the green pellets deteriorates.

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
  • Manufacturing method of green pellets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In this embodiment, in the filtering step after the beneficiation step, 30% (by mass percentage) sulfuric acid solution is added to the pulp, and at the same time or later, the dedusting ash in the plant is also "in advance" added to the pulp. The "advance" here is relative to the prior art method described in the background art section, in which the dedusting ash in the plant is added during "pelletizing".

[0048] Specific steps are as follows:

[0049] (1) Sulfuric acid solution is provided: the concentrated sulfuric acid is prepared into a 30% (by mass percentage) sulfuric acid solution.

[0050] (2) Add sulfuric acid solution into the pulp: add 30% sulfuric acid solution into the pulp, the consumption of sulfuric acid solution is 355g / t pulp.

[0051] (3) Add dust removal ash in the factory to the pulp: the amount of dust removal dust in the factory is 80kg / t pulp.

[0052] (4) Filtrating the pulp to obtain iron ore concentrate powder.

[0053] (5) Pelletizing w...

Embodiment 2

[0065] In this embodiment, in the filtering step after the beneficiation step, 30% (by mass percentage) sulfuric acid solution is added to the pulp, and at the same time, the dedusting ash in the plant is also added to the pulp in advance.

[0066] Specific steps are as follows:

[0067] (1) Sulfuric acid solution is provided: the concentrated sulfuric acid is prepared into a 30% (by mass percentage) sulfuric acid solution.

[0068] (2) Add sulfuric acid solution to the pulp: add 30% sulfuric acid solution into the pulp, the consumption of sulfuric acid solution is 395g / t pulp.

[0069] (3) Add dust removal ash in the factory to the pulp: the amount of dust removal dust in the factory is 80kg / t pulp.

[0070] (4) Filtrating the pulp to obtain iron ore concentrate powder.

[0071] (5) Pelletizing with iron concentrate powder to obtain green pellets.

[0072] The iron concentrate powder and bentonite are compounded according to the following weight percentages, and the specif...

Embodiment 3

[0083] In this embodiment, in the filtering step after the beneficiation step, 30% (by mass percentage) sulfuric acid solution is added to the pulp, and at the same time, the dedusting ash in the plant is also added to the pulp in advance.

[0084] Specific steps are as follows:

[0085] (1) Sulfuric acid solution is provided: the concentrated sulfuric acid is prepared into a 30% (by mass percentage) sulfuric acid solution.

[0086] (2) Add sulfuric acid solution into the pulp: add 30% sulfuric acid solution into the pulp, the consumption of sulfuric acid solution is 435g / t pulp.

[0087] (3) Add dust removal ash in the factory to the pulp: the amount of dust removal dust in the factory is 80kg / t pulp.

[0088] (4) Filtrating the pulp to obtain iron ore concentrate powder.

[0089] (5) Pelletizing with iron concentrate powder to obtain green pellets.

[0090] Carry out batching with iron ore concentrate powder and bentonite according to the following weight percentage, conc...

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

PropertyMeasurementUnit
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a manufacturing method of green pellets. The manufacturing method comprises the steps of beneficiation; filtering, wherein after the step of beneficiation is finished, when orepulp is filtered, a certain quantity of sulfuric acid solution is firstly added into the ore pulp, dust is removed in a plant, then the ore pulp is filtered, and therefore iron ore concentrate powderis obtained; and pelletizing, wherein the iron ore concentrate powder is used for pelletizing to obtain the green pellets. According to the manufacturing method, when the ore pulp is filtered after the beneficiation process is finished, a certain quantity of sulfuric acid solution is added into the ore pulp, dust is removed in the plant, and then the iron ore concentrate powder is obtained afterthe ore pulp is filtered. Tests show that the green pellets manufactured through the iron ore concentrate powder can greatly reduce the cracking probability under the high temperature drying condition. Thus, by means of the manufacturing method, the heat performance of the green pellets can be improved, and the quality of the green pellets can be improved easily.

Description

technical field [0001] The invention relates to the technical field of manufacturing methods of iron ore powder pellets, in particular to a manufacturing method of green pellets. Background technique [0002] Iron concentrate is the main iron material for the production of pellets. Traditionally, iron ore concentrate powder is obtained by finely grinding raw ore with low iron grade in a ball mill, then going through the beneficiation process to obtain ore pulp, and then filtering the ore pulp to obtain iron ore powder with a moisture content of about 8-10%. In the beneficiation process, in order to improve the iron grade of iron ore concentrate powder, a part of the flotation process is adopted, and starch is added as a reagent to improve the flotation efficiency. Due to the high moisture content of iron ore powder after flotation, it is necessary to dry and dehydrate the iron ore powder in the drying kiln before producing pellets, so as to obtain iron concentrate with suit...

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): C22B1/248
CPCC22B1/2406C22B1/248
Inventor 范建军史永林臧龙崔建春王磊李昊堃高晓梅李泽岩蔡湄夏
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