Process for preparing hot molten iron and byproducts by utilizing red mud

A process method and by-product technology, which are applied in the field of producing hot molten iron and by-products, can solve the problems of inability to select magnetic separation methods, and achieve the effect of reducing production costs.

Inactive Publication Date: 2012-02-08
胡长春 +1
View PDF3 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to overcome the deficiencies in the prior art, and provide a process for utilizing red mud to produce hot molten iron and by-products, which can solve the problem of magnetic separation methods (including superconducting magnetic separation m

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
  • Process for preparing hot molten iron and byproducts by utilizing red mud
  • Process for preparing hot molten iron and byproducts by utilizing red mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] see figure 1 , describe in detail the process for implementing the first embodiment of the present invention. (If the content of titanium and aluminum in the red mud used is relatively high, the following method is adopted)

[0032] A process for preparing hot molten iron and by-products from red mud, comprising the following steps:

[0033] a) According to the ratio of 1:0.1:0.3 by weight, take red mud, lime, coal, and mix them uniformly to make mixed raw meal;

[0034] b) Add the above-mentioned mixed raw meal into the rotary kiln 1, the temperature in the rotary kiln 1 is 800-1460 degrees Celsius; the mixed raw meal is dried and pre-reduced in the rotary kiln for 2-10 hours, and the semi-molten The reduced raw material in the state; the temperature in the rotary kiln 1 from the tail to the head gradually rises from 800 degrees Celsius to 1460 degrees Celsius;

[0035]c) Enter the above-mentioned reducing material into the diversion groove 2 from the discharge port...

Embodiment 2

[0039] see figure 1 , describe in detail the process for implementing the second embodiment of the present invention. (If the content of titanium and aluminum in the red mud used is relatively high, the following method is adopted)

[0040] A process for preparing hot molten iron and by-products from red mud, comprising the following steps:

[0041] a) According to the ratio of 1:0.2:0.4 by weight, take red mud, lime, coal, and mix them uniformly to make mixed raw meal;

[0042] b) Add the above-mentioned mixed raw meal into the rotary kiln 1, and the temperature in the rotary kiln 1 is 800-1460 degrees Celsius; the mixed raw meal is dried and pre-reduced in the rotary kiln 1 for 2-10 hours, and the resulting half The reducing material in the molten state; the temperature in the rotary kiln 1 from the tail to the head gradually rises from 800 degrees Celsius to 1460 degrees Celsius;

[0043] c) The above-mentioned reducing material is entered into the diversion groove 2 thr...

Embodiment 3

[0047] see figure 1 , describe in detail the process for implementing the third embodiment of the present invention. (If the content of titanium and aluminum in the red mud used is relatively high, the following method is adopted)

[0048] A process for preparing hot molten iron and by-products from red mud, comprising the following steps:

[0049] a) According to the ratio of 1:0.1:0.3 by weight, take red mud, lime, coal, and mix them uniformly to make mixed raw meal;

[0050] b) Add the above-mentioned mixed raw meal into the rotary kiln 1, the temperature in the rotary kiln 1 is 900-1360 degrees Celsius; the mixed raw meal is dried and pre-reduced in the rotary kiln for 3-8 hours, and the resulting semi-molten The reduced raw material in the state; the temperature in the rotary kiln 1 from the tail to the head gradually rises from 900 degrees Celsius to 1360 degrees Celsius;

[0051] c) Enter the above-mentioned reducing material into the diversion groove 2 from the disc...

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 provides a process for preparing hot molten iron and byproducts by utilizing red mud. The process comprises the following steps of: a) mixing the red mud, lime and coal; b) adding a mixture obtained in the step a) in a rotary kiln for drying and pre-reduction; c) introducing a reduced material into a diversion trench for air injection and combustion supporting, carrying out melting and slag-iron separation, discharging the slag on the upper layer from a slag outlet, and flowing the hot molten iron on the lower layer out of an hot molten iron outlet; d) preparing cement clinker and silicon-titanium-aluminum alloy from the slag in a melt separation furnace; e) preparing microlite powder from the slag in the melt separation furnace; and f) recovering superheated steam, and preparing a mixed liquid. The process has the advantages that a large amount of calcium compounds are not necessarily doped, and coke is also not necessarily used, thereby solving the problem that slag spitting is not carried out by using a blast furnace process, and greatly reducing cost; toxic red mud is recycled so as to obtain the elementary substance iron, thereby solving the problems that the red mud occupies land and pollutes environment; and the byproducts such as silicon-titanium-aluminum alloy, superheated steam, sodium salt, microlite powder and the like can also be obtained, the zero emission of solid pollutants is achieved, gas reaches the standard to be discharged and low-carbon discharge is achieved. Thus, the process provided by the invention is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and in particular relates to a process for preparing hot molten iron and by-products from red mud. Background technique [0002] Red mud, its main components are: 5% to 25% of alumina; 30% to 55% of iron oxide; 5% to 25% of silicon oxide; 3% to 9% of sodium oxide; Titanium, magnesium oxide, calcium oxide, etc. 5% to 10%. It generally contains a large amount of iron oxide, and its appearance is similar to red soil, hence the name; it is the polluting waste slag discharged when the aluminum industry extracts alumina, its pH value is very high, and the pH value of the leachate is 12.1-13.0. In industrial production, on average, 1 to 2 tons of red mud is produced for every ton of alumina produced. As the fourth largest producer of alumina in the world, China discharges tens of millions of tons of red mud every year, while the world produces about 70 million tons of red mud every year. A lar...

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): C21B15/00C22B7/00
CPCC21B15/00C21B13/006C21B13/085C22B7/001C22B7/00Y02P10/20
Inventor 胡长春胡晓雪
Owner 胡长春
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