Application of limonite as adhesive and pellet preparation method

A technology of pelletizing ore and limonite, which is applied in the field of metal smelting, can solve the problems affecting the pelletizing performance of iron ore powder, the quality of pellets, the decline in production, and the reduction of iron grade in pellets, so as to achieve the goal of ore blending The effect of reducing cost, improving grade and reducing the amount of blast furnace slag

Pending Publication Date: 2021-12-03
INNER MONGOLIA UNIV OF SCI & TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, the binder used in the production of pellets in my country is mainly bentonite, and there is a problem that the proportion of bentonite is generally too high, which not only reduces the iron grade of the pellets, but also increases the amoun

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
  • Application of limonite as adhesive and pellet preparation method
  • Application of limonite as adhesive and pellet preparation method
  • Application of limonite as adhesive and pellet preparation method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] The present invention provides a method of preparing a pellet mine, and the preparation method of the ball is comprised of the step of adding the abovened brown mine powder as a binder in a magnet mineral powder.

[0038] Preferably, the preparation method comprises the steps of:

[0039] Step 1) Raw material preparation and mixing: the magnet mine powder after drying at a certain temperature is pulverized to a certain particle size of brown mineral powder and bentonite mixed to obtain a mixture;

[0040] Step 2) Ball: Put the mixed material obtained by step 1) into the globular device, and the ball is obtained under certain operating conditions;

[0041] Step 3) Dry: The result obtained by step 2) is dried under certain conditions to obtain a dry ball;

[0042] Step 4) Preheating: The drill obtained by step 3) is preheated at a certain temperature to obtain a preheating ball;

[0043] Step 5) Roast: The preheating ball obtained by step 4) is calcined at a certain temperatu...

Example Embodiment

[0096] Example 1

[0097] The pellet mine preparation method of this embodiment is used as follows:

[0098] Step 1) Raw material preparation and mixing: the magnet mine powder after drying at 110 ° C, pulverize the brown mine powder and bentonite mixed below 200 mesh, to obtain a mixture, the quality of the first magnet mine powder in the mixture The percentage of 64%, the mass percentage of the second magnet mine powder is 32%, the amount of brown iron powder is 4%, the amount of bentonite is the first magnet mine powder, the second magnetite powder and the brown mine 1.5% of the quality of powder;

[0099] Step 2) Ball: The mixture obtained by step 1) is placed in the globular device, which is 1M in diameter, 45 ° in the diameter, and the magazine of the rotational speed of 30R / min, the ball time is controlled as a mother. The ball is formed for 3 minutes, and the foggy is 8 minutes, no water is 10 minutes, gotting the ball;

[0100] Step 3) Dry: The result obtained by step 2...

Example Embodiment

[0105] Example 2

[0106] The pellet mine preparation method of this embodiment is used as follows:

[0107] Step 1) Raw material preparation and mixing: the magnet mine powder after drying at 110 ° C, pulverize the brown mine powder and bentonite mixed below 200 mesh, to obtain a mixture, the quality of the first magnet mine powder in the mixture The percentage of 64%, the mass percentage of the second magnet mine powder is 32%, the amount of brown iron powder is 4%, the amount of bentonite is the first magnet mine powder, the second magnetite powder and the brown mine 1.5% of the quality of powder;

[0108] Step 2) Ball: The mixture obtained by step 1) is placed in the globular device, which is 1M in diameter, 45 ° in the diameter, and the magazine of the rotational speed of 30R / min, the ball time is controlled as a mother. The ball is formed for 3 minutes, and the foggy is 8 minutes, no water is 10 minutes, gotting the ball;

[0109] Step 3) Drying: The result obtained by ste...

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
Particle sizeaaaaaaaaaa
Mana absorptionaaaaaaaaaa
Expansion indexaaaaaaaaaa
Login to view more

Abstract

The invention discloses an application of limonite with excellent balling property as an adhesive and a pellet preparation method. The limonite comprises limonite powder, and chemical components of the limonite powder comprise iron, silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide, water, sulfur, phosphorus and the like. The pellet preparation method comprises the steps of raw material preparation and mixing, pelletizing, drying, preheating, roasting, cooling and the like. The drying comprises forced air drying and air draft drying. The balling index of the limonite-based adhesive reaches 1.55, and the balling index is improved by 59.8% compared with the balling index of bentonite in the prior art. By the adoption of the pellet preparation method with the limonite powder as the adhesive, the adding amount of the bentonite in the pelletizing process can be reduced by 40%, the charging grade of iron-containing raw materials of a blast furnace is improved by 0.18%, the slag discharging amount is reduced by 0.27%, the carbon dioxide emission amount is reduced by 0.99%, and the ore blending cost is reduced by 22 yuan/ton or above. The blast furnace smelting has the benefits of cost reduction, efficiency improvement, energy conservation and emission reduction, and has important significance for realizing carbon neutralization when carbon reaches the peak.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to an application of limonite as a binder and a preparation method of pellets. Background technique [0002] With the rapid development of the iron and steel industry, ironmaking blast furnaces are developing towards large-scale development. However, due to the increase in the cost of raw materials, fuels and energy and power, iron and steel enterprises are currently in an era of meager profits. All iron and steel enterprises can only continue to reduce costs to adapt to the meager profits they are in. In order to obtain a larger space for production competition, blast furnace ironmaking puts forward higher requirements on the quality of the furnace charge. [0003] During the sintering process of iron and steel smelting, the emission of flue gas is large and the pollution is serious, which is difficult to be treated by conventional technology. However, due to the high iron c...

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): C22B1/243
CPCC22B1/243C22B1/2406
Inventor 罗果萍任杰柴轶凡朱建国陈银胜纪祥辉刘浩
Owner INNER MONGOLIA UNIV OF SCI & TECH
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