Method for preparing aluminum-silicon-ferrum alloy from coal gangue

A technology of coal gangue and ferroalloy, which is applied in the field of preparing aluminum-silicon-ferroalloy by using coal gangue, can solve the problems of large amount of natural bauxite, uneven feeding materials, slow reaction speed, etc., and achieves short sintering time, fast reduction, good plasticity

Inactive Publication Date: 2011-01-12
TONGFANG ENVIRONMENT
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in Document 1 and the patent document, the raw materials are directly put into the furnace for smelting without preparing pellets, and there are problems such as ...

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 preparing aluminum-silicon-ferrum alloy from coal gangue
  • Method for preparing aluminum-silicon-ferrum alloy from coal gangue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Proceed as follows:

[0031] ① Raw material selection of coal gangue content Al 2 o 3 42.93%, SiO 2 51.92%, Fe 2 o 3 The reducing agent is selected from bituminous coal with low ash content, high fixed carbon content and good caking property. The coal gangue and bituminous coal are crushed, the crushed particle size of coal gangue is below 0.2mm, and the crushed bituminous coal particle size is below 2mm.

[0032] ②Select the content of Al in fly ash iron microbeads 2 o 3 15.4%, SiO 2 25.5%, Fe 2 o 3 It is 55.1%, and it is sent into the mixing mill together with the above-mentioned pulverized materials, and an appropriate amount of water is added for mixing and rolling.

[0033] ③ After uniform mixing and grinding, the material is sent to the ball press machine to form balls, and the ball forming pressure is 8Mpa.

[0034] ④The pellets coming out of the briquetting machine enter the drying kiln for drying at 160°C for 1 hour.

[0035] ⑤ The dried pellets are...

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 method for preparing an aluminum-silion-ferrum alloy from coal gangue, which relates to the technical field of aluminum-silion-ferrum production. The method comprises the following steps of: 1) crushing the raw material coal gangue and a reducing agent bituminous coal, and feeding the crushed material and coal ash ferric microballoons into a mixing mill; 2) adding water into the mixing mill, and mixing and rolling the material; 3) feeding the uniformly mixed and rolled material into a ball press for balling; 4) feeding balls discharged out of the ball press into a drying kiln for drying; 5) feeding the dried balls into a submerged arc furnace, and smelting the balls into molten iron at high temperature; and 6) discharging the molten iron out of the furnace and casting the molten iron into an ingot mould to prepare the aluminum-silion-ferrum alloy. As the coal gangue is mainly adopted as the raw material, the method has the advantages of vast raw material sources, low production cost and low energy consumption; and the prepared low-aluminum high-silicon aluminum-silion-ferrum alloy is applied to steelmaking deoxiders and magnesium-smelting reducing agents and can produce remarkable economic benefits.

Description

technical field [0001] The invention relates to the technical field of ferrosilicon production, in particular to a method for preparing ferrosilicon alloys from coal gangue. Background technique [0002] Al-Si-Ferroalloy is mainly used as a deoxidizer in steelmaking plants. At present, its production methods include blending method and electrothermal method. The blending method uses aluminum ingots, industrial silicon or ferrosilicon as raw materials, which are remelted and melted and mixed in proportion, which is costly and consumes a lot of energy. The electrothermal method is to use aluminosilicate minerals and add steel shavings or iron-containing ore to directly smelt them with a reducing agent in a submerged arc furnace. The raw materials for aluminum-silicon initial alloy smelting by electrothermal method are mainly aluminosilicate minerals such as bauxite and kaolinite. The current shortage of natural bauxite leads to high raw material costs. Coal gangue is one of ...

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): C22B4/06
CPCY02P10/20
Inventor 孙俊民汤乐萍曹慧芳孟德润张晓云项光明张战军姚强
Owner TONGFANG ENVIRONMENT
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