Unlock instant, AI-driven research and patent intelligence for your innovation.

A low-grade chromium-containing vanadium-titanium magnetite oxidized pellet and its preparation method

A technology of vanadium-titanium magnetite and oxidized pellets, which is applied in the field of blast furnace smelting, can solve the problems of lack of research on the preparation process of oxidized pellets, and achieve the effects of short roasting time, cost saving and low roasting temperature

Active Publication Date: 2017-11-03
NORTHEASTERN UNIV LIAONING
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are relatively many studies and utilizations of high-grade chromium-containing vanadium-titanium magnetite, while the research on low-grade chromium-containing vanadium-titanium magnetite has just begun, and low-grade chromium-containing vanadium-titanium magnetite The research on the preparation process of oxidized pellets is even more scarce

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
  • A low-grade chromium-containing vanadium-titanium magnetite oxidized pellet and its preparation method
  • A low-grade chromium-containing vanadium-titanium magnetite oxidized pellet and its preparation method
  • A low-grade chromium-containing vanadium-titanium magnetite oxidized pellet and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A low-grade chromium-containing vanadium-titanium magnetite oxidized pellet and a preparation method thereof, comprising the following steps:

[0044] (1) Mixture:

[0045] Add low-grade chromium-containing vanadium-titanium magnetite powder and bentonite, add water, mix evenly, then cover with a plastic bag, and stew the material for 30 minutes to make the moisture in the raw materials uniform, and at the same time make the water loss as little as possible; among them, the added bentonite Accounting for 2.0% of the weight of the low-grade chromium-containing vanadium-titanium magnetite powder, the added water accounts for 7.0% of the total weight of the low-grade chromium-containing vanadium-titanium magnetite powder and bentonite;

[0046] (2) Ball making:

[0047] Put the stewed material in a disc pelletizer with a rotating speed of 16r / min, add water, prepare cue balls for 7 minutes, and prepare green balls for 30 minutes to obtain a low-grade chromium-containing t...

Embodiment 2

[0054] A low-grade chromium-containing vanadium-titanium magnetite oxidized pellet and a preparation method thereof, comprising the following steps:

[0055] (1) Mixture:

[0056] Add low-grade chromium-containing vanadium-titanium magnetite powder and bentonite, add water, mix evenly, then cover with a plastic bag, and stew the material for 35 minutes to make the moisture in the raw materials uniform, and at the same time make the moisture loss as little as possible; among them, the added bentonite Accounting for 1.0% of the weight of the low-grade chromium-containing vanadium-titanium magnetite powder, the added water accounts for 7.0% of the total weight of the low-grade chromium-containing vanadium-titanium magnetite powder and bentonite;

[0057] (2) Ball making:

[0058] Put the stewed material in a disc pelletizer with a rotating speed of 20r / min, add water, prepare cue balls for 10 minutes, and prepare green balls for 35 minutes to obtain a low-grade chromium-containi...

Embodiment 3

[0067] A low-grade chromium-containing vanadium-titanium magnetite oxidized pellet and a preparation method thereof, comprising the following steps:

[0068] (1) Mixture:

[0069] Add low-grade chromium-containing vanadium-titanium magnetite powder and bentonite, add water, mix evenly, then cover with a plastic bag, and stew the material for 40 minutes to make the moisture in the raw materials uniform, and at the same time make the water loss as little as possible; among them, the added bentonite Accounting for 1.2% of the weight of the low-grade chromium-containing vanadium-titanium magnetite powder, the added water accounts for 8.0% of the total weight of the low-grade chromium-containing vanadium-titanium magnetite powder and bentonite;

[0070] (2) Ball making:

[0071] Put the stewed material in a disc pelletizer with a rotating speed of 16r / min, add water, prepare cue balls for 15 minutes, and prepare green balls for 40 minutes to obtain low-grade chromium-containing ty...

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
Login to View More

Abstract

A kind of low-grade chromium-containing vanadium titanium magnetite oxidation pellets, containing TFe of 42.89~43.44wt.%, containing chemical components and their weight percentages: Fe2O3: 61.07~62.04%, FeO: 0.07~0.14% , CaO: 3.42~3.50%, SiO2: 7.89~8.60%, MgO: 0.72~0.74%, Al2O3: 2.02~2.16%, TiO2: 20.83~21.08%, V2O5: 1.60~1.62%, Cr2O3: 0.02~0.06%, S≤0.032%, P≤0.002%, and the balance is unavoidable impurities. The preparation method is as follows: low-grade chromium-containing vanadium-titanium magnetite powder and bentonite are mixed with water and stewed; preparing green balls; drying; oxidation roasting to obtain low-grade chromium-containing vanadium-titanium magnetite oxidized pellets . A large amount of silicates are generated in the oxidized pellets produced by the method of the present invention, so that a large amount of liquid phase can be formed inside the pellets at a low temperature, thereby enhancing the degree of continuous crystallization of the mineral powder particles and improving the quality of the pellets. and output are effectively increased.

Description

technical field [0001] The invention belongs to the technical field of blast furnace smelting in the comprehensive utilization method of low-grade chromium-containing vanadium-titanium magnetite, and in particular relates to a low-grade chromium-containing vanadium-titanium magnetite oxidized pellet and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of China's iron and steel industry, the domestic iron ore market is in short supply, and low-grade chromium-containing vanadium-titanium magnetite resources, as a potential iron ore resource, have extremely high mining and utilization value and are expected to be entrusted high hopes. Low-grade chromium-containing vanadium-titanium magnetite, as a polymetallic co-associated ore, is not only rich in iron, but also rich in strategic metals such as vanadium, titanium, chromium and other beneficial elements, and has great development value. [0003] At present, there are relat...

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): C22B1/243C22B1/02
CPCC22B1/02C22B1/243
Inventor 薛向欣程功金高子先杨合姜涛段培宁
Owner NORTHEASTERN UNIV LIAONING