Direct reduction method for producing medium-and-low-carbon manganese-iron alloy

A technology of low-carbon ferromanganese and reduction method, applied in the field of direct reduction method, can solve the problems of damage to the environment, high production cost, serious pollution, etc., and achieve the effects of meeting environmental protection requirements and short production process

Inactive Publication Date: 2013-12-18
黄兴国
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are three traditional methods for producing medium and low carbon ferromanganese alloys: one is the electrosilicon heating method, that is, manganese ore is first smelted into manganese-rich slag → smelted into silicon-manganese alloy → mixed with manganese-rich slag to form medium and low-carbon ferromanganese alloy; The second is to use high-carbon ferromanganese to blow oxygen to decarburize to prepare medium and low-carbon ferromanganese alloys; ...

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
  • Direct reduction method for producing medium-and-low-carbon manganese-iron alloy
  • Direct reduction method for producing medium-and-low-carbon manganese-iron alloy

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0029] (1) Raw material composition

[0030]

[0031] (2) Ingredients:

[0032] The weight of anthracite required to reduce the Mn in 100kg manganese ore is 17kg (the utilization rate of anthracite is 90%);

[0033] The weight of anthracite required to reduce Fe in 100kg manganese ore is 3kg (the utilization rate of anthracite is 90%);

[0034] Therefore, the total weight of anthracite required to reduce Mn and Fe in 100kg manganese ore is 20kg.

[0035] SiO in 100kg manganese ore 2 The weight of limestone required for slag making is 23kg (select the slag alkalinity to be 1.4). The amount of the above-mentioned anthracite and limestone is calculated according to the raw material composition and equations (4), (7), (8), and (9) and configured in excess.

[0036] (3) Steps:

[0037] A. 100kg of manganese ore, 20kg of anthracite, and 23kg of limestone of the above-mentioned components are dropped into a pulverizer and pulverized to 120 orders to obtain a mixture;

[0038...

example 2

[0042] Manganese ore, anthracite, and limestone were mixed and crushed to 100 mesh, and the agglomerates were dried at 300°C. The roasting temperature in the tunnel-type reduction furnace was 1180°C, and the roasting time was 180 minutes. The rest were the same as in Example 1.

example 3

[0044] Manganese ore, anthracite, and limestone were mixed and crushed to 110 meshes, and the agglomerates were dried at 250°C. The roasting temperature in the tunnel-type reduction furnace was 1160°C, and the roasting time was 160 minutes. The rest were the same as in Example 1.

[0045] Manganese ore, anthracite, and limestone were purchased from local villages and used after testing.

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 discloses a direct reduction method for producing a medium-and-low-carbon manganese-iron alloy. The invention aims to provide a direct reduction method for producing a medium-and-low-carbon manganese-iron alloy. The method is characterized by comprising the following steps: A, mixing manganese ores, blind coal and limestone, putting into a pulverizer, and pulverizing to 100-120 meshes; B, briquetting the pulverized mixture obtained in the step A, and drying at 200-300 DEG C; C, putting the briquettes obtained in the step B on a distribution vehicle, feeding into a tunnel type reducing furnace, and performing high-temperature reduction roasting with coal gas at 1140-1180 DEG C for 150-180 minutes; and D, throwing the reduction roasting briquettes obtained in the step C into an electric furnace, and smelting to obtain the product medium-and-low-carbon manganese-iron alloy and furnace slag, wherein the furnace slag is transferred to serve as a raw material of cement. The method is mainly used for production of a medium-and-low-carbon manganese-iron alloy.

Description

technical field [0001] The invention relates to a direct reduction method, in particular to a direct reduction method for producing medium and low carbon ferromanganese alloys. Background technique [0002] There are three traditional methods for producing medium and low carbon ferromanganese alloys: one is the electrosilicon heating method, that is, manganese ore is first smelted into manganese-rich slag → smelted into silicon-manganese alloy → mixed with manganese-rich slag to form medium and low-carbon ferromanganese alloy; The second is to use high-carbon ferromanganese to blow oxygen and decarburize to prepare medium and low-carbon ferromanganese alloys; the third is electrolysis; the disadvantage of the first method is that the process is long and the recovery rate of manganese is low (only about 55%); The disadvantages of the two methods are that the production process of high-carbon ferromanganese has large pollution, high requirements on raw material quality, and hi...

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): C21B13/14
Inventor 黄兴国
Owner 黄兴国
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