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

Method for producing starting material for sintering

A manufacturing method and technology of raw materials, applied in the field of manufacturing raw materials for sintering, can solve problems such as inability to obtain sufficient effects, mixing of micro-powdered coke in the filling layer, and reduction of coke powder coating amount, so as to shorten the time for external assembly, improve productivity, Powder produces a lightening effect

Active Publication Date: 2013-04-10
JFE STEEL CORP
View PDF10 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, such technology may also cause the following problems: in reducing CO 2 In the case of reducing the coke powder as a solid fuel raw material powder based on the requirements of the company, the coating amount of the coke powder will decrease, and a sufficient effect cannot be obtained.
[0023] However, since the sintering fuel produced by the above method is weak in strength of individual particles, it is broken when mixed with other sintering raw materials in a tumble mixer, and the sintering raw materials are placed in the sintering machine. When the packed bed is formed on the trolley, the mixing / existence of fine coke in the packed bed may occur unevenly
Therefore, when the so-called "sintering operation" is performed by igniting in this state, there is a problem that uneven combustion occurs in the sintering machine, and ideal operation cannot be performed.
[0024] In addition, because the fine powder coke produced by CDQ is in a dry state, dust will be generated during processing. On the other hand, since the fine powder coke produced in the wet fire extinguishing device is in a wet state, it needs to be reused after adding a drying process. Both of them have the disadvantage of increasing the cost of treatment and drying for reuse.

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
  • Method for producing starting material for sintering
  • Method for producing starting material for sintering
  • Method for producing starting material for sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0144] Such as figure 1 As shown, iron ore 2 and containing SiO 2 The raw material 3 is charged into the tumble mixer 1 from the inlet for granulation. It should be noted that, as a SiO-containing 2 Raw material 3 used silica or nickel slag. In the tumble mixer 1, iron ore 2 and SiO-containing 2 Raw material 3 was granulated to become quasi-particles, and limestone with an average particle diameter of 1.2 mm was added as limestone-based raw material powder 4 at a position where the residence time of the quasi-particles reached the outlet of the tumble mixer 1 was 40 seconds. 8% by mass and 2% by mass of superfine limestone powder with an average particle size of 50 μm (combined use ratio to the total limestone: 20%), and coke powder 4 with an average particle size of 0.9 mm as solid fuel raw material powder 5 % by mass and 1% by mass of high carbon dust with an average particle diameter of 50 μm (combined use ratio to total coke: 20%). In addition, the specific addition m...

Embodiment 2

[0153] In the same manner as in Example 1, various raw materials for sintering shown in Table 3 (invention examples 2 and 3 and comparative example 3) were produced. Table 3 shows the mixing ratio of raw materials in each raw material for sintering.

[0154] Invention Example 2 is a case where 20% by mass of ultrafine limestone powder is used in combination with the total limestone, and Invention Example 3 is a combination of 20% by mass of ultrafine limestone powder with respect to the total limestone, and high-carbon powder is used in combination with the total coke. The case where the dust is 20% by mass. It is to be noted that the exterior time was 40 seconds in Invention Examples 2 and 3, and 80 seconds in Comparative Example 3.

[0155] The sintering time, yield, and productivity of the sintering raw materials thus obtained were compared and compared, and are shown in Figure 8 .

[0156] [table 3]

[0157] Mixing ratio (mass%)

[0158] Such as Figure 8 A...

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

Provided is an advantageous method for producing a starting material for sintering, wherein it is possible to improve productivity compared to conventional methods by effectively using ultrafine limestone powder and high-carbon dust during the process in which the surface of pseudo particles is being covered with a limestone-based powder starting material and a solid-fuel-based powder starting material. When the surface of pseudo particles is being covered with a limestone-based powder starting material and a solid-fuel-based powder starting material, a limestone-based powder starting material containing 5 to 40 mass% of ultrafine limestone particles is used as the limestone-based powder starting material and a solid-fuel-based powder starting material containing 5 to 40 mass% of high-carbon dust is used as the solid-fuel-based powder starting material.

Description

technical field [0001] This invention relates to the manufacturing method of the raw material for sintering used when manufacturing sintering ore using the DL type sintering machine (Dwight-Lloyd sintering machine) of a downward suction type. Background technique [0002] The sintered ore to be charged into the blast furnace is generally manufactured as follows. [0003] First, the raw materials roughly classified into the following (a) to (d) are charged into a tumble mixer, then mixed with an appropriate amount of water, and granulated to produce granular raw materials for sintering. [0004] (a) Iron ore (ore, return ore) [0005] (b) SiO containing silica, serpentinite, nickel slag, etc. 2 raw material [0006] (c) Limestone raw material powder containing CaO such as limestone [0007] (d) Coke powder, anthracite, and other solid fuel raw material powders used as heat sources [0008] Raw materials for sintering, including granulated particles formed by mixing and g...

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): C22B1/16
CPCC22B1/16C22B1/245
Inventor 樋口隆英大山伸幸竹内直幸主代晃一
Owner JFE STEEL CORP
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