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

Method for producing direct reduced iron using carbon-containing pellets

A carbon pellet and reduced iron technology, applied in the field of reduced iron production, can solve the problems of thin carbon-containing pellet material layer, inability to achieve large-scale mass production, low utilization rate of gas heat energy, etc. Improve the utilization rate of raw materials and equipment utilization, and the effect of a wide range of applications

Active Publication Date: 2016-08-17
SHEN KAN QINHUANGDAO GENERAL ENG DESIGN & RES INST CORP MCC
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rotary hearth furnace mainly relies on radiation heat transfer, and the layer of carbon-containing pellets laid on the furnace is only 15-30mm, otherwise the heat cannot be transferred to the bottom of the carbon-containing pellet layer, so the utilization rate of the rotary hearth furnace is very low. Generally 100m 2 The annual output of the rotary hearth furnace is only 70,000 tons of reduced iron, which is only equivalent to 1 / 15 of the capacity of the sintering machine with the same area, so that large-scale mass production cannot be achieved; The temperature of the smoke is very high, and the utilization rate of gas heat energy is also low

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 direct reduced iron using carbon-containing pellets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The method for producing direct reduced iron by using carbon-containing pellets according to the present invention will be further described below based on specific examples and accompanying drawings, but this description does not constitute an improper limitation to the technical solution of the present invention.

[0033] figure 1 It shows the implementation process of the method for producing direct reduced iron using carbon-containing pellets according to the present invention.

[0034] Such as figure 1 As shown, the shaft furnace 10 includes from top to bottom: a distributor 2, a drying bed 3, a belt conveyor 1, an air guide wall 4, a combustion chamber 5 and a nozzle 51, a cooling pipe 6 and an inlet 61, and a toothed roller unloader 7. Vibrating unloader 8 and conveyor 9; in addition, it also includes a batching room with a raw material bin, a batching machine and a metering device, a mixing machine, and a pelletizing machine (not in figure 1 shown in ).

[00...

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for producing direct reduced iron by adopting carbon-containing pellets. The method comprises the following steps: 1, mixing iron ore concentrate powder with coal powder according to a ratio of 5:1-6:1, bonding and pelletizing by an adhesive to prepare the carbon-containing pellets, and drying; and 2, heating the carbon-containing pellets to make iron oxide in the carbon-containing pellets reduced to metallic iron by carbon the carbon-containing pellets. The method for producing direct reduced iron by adopting carbon-containing pellets improves the raw material utilization rate and the device usage rate, improves the production efficiency and reduces the production cost.

Description

technical field [0001] The invention relates to an iron smelting method, in particular to a method for producing reduced iron. Background technique [0002] At present, there are dozens of production methods of DRI (Direct Reduction Iron) in the world, which can be roughly divided into two categories: gas-based method and coal-based method. The former uses natural gas as the reducing agent, which is the mainstream of DRI production today, but due to the lack of natural gas resources, it has not been widely promoted in my country. The latter is represented by rotary kilns and tunnel kilns, which have low production efficiency and high energy consumption. However, my country is rich in coal resources, so the coal-based method is still the main production method of direct reduced iron in my country. [0003] Another coal-based process is to use a rotary hearth furnace to heat carbon-containing pellets to achieve the purpose of direct reduction of iron. First, spread the carbon...

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 Patents(China)
IPC IPC(8): C22B1/242C21B13/00
Inventor 胡嘉龙阎军
Owner SHEN KAN QINHUANGDAO GENERAL ENG DESIGN & RES INST CORP MCC
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