Method for improving quality of high-chromium vanadium and titanium sinter

A technology of vanadium-titanium sinter and high chromium type, which is applied in the field of iron and steel metallurgy to achieve the effects of improved gas permeability, low production cost and increased yield

Inactive Publication Date: 2015-12-23
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, at present, domestic research and development of high-chromium vanadium-titanium magnetite sintering technology is less, and theoretical research and actual production still need to be greatly improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare sintering raw materials such as sintering return ore, high-chromium vanadium-titanium concentrate powder, ordinary iron concentrate powder, boron iron concentrate powder, metallurgical lime, magnesite, coke powder, etc. Some properties of sintered raw materials are as follows: (1) The particle size of sintered return ore is less than 5.0mm, the particle size of metallurgical lime is less than 0.5mm, and the particle size of magnesite and coke powder is less than 3.0mm; (2) Cr in high-chromium vanadium-titanium concentrate powder 2 o 3 content of 0.47%, TFe content of 61.15%, TiO 2 The content is 6.39%, V 2 o 5 The content of TFe is 0.95%; (3) The content of TFe in ordinary iron concentrate powder is 64.50%; (4) B in ferroboron concentrate powder 2 o 3 The content of MgO is 3.86%, the content of MgO is 7.84%, and the content of TFe is 56.05%. (5) The effective flux of metallurgical lime is 48.90%, the content of MgO in magnesite is 42.00%, and the content of ...

Embodiment 2

[0037] The method is similar to Example 1, the difference is:

[0038] (1) 2.5% boron iron concentrate is added to the sintering raw material. The proportions of sintering return ore, high-chromium vanadium-titanium concentrate powder, ordinary iron concentrate powder and boron-iron concentrate are 13.65%, 12.78%, 50.55% and 2.50% of the total mass of sintering raw materials, respectively.

[0039] (2) Metallurgical lime, magnesite, and coke powder accounted for 12.58%, 3.07%, and 4.87% of the total mass of sintered raw materials respectively

[0040] (3) Carry out ignition and ventilation sintering, the ignition temperature is 1050°C, the ignition time is 2.0min, the ignition negative pressure is 5.5kPa, and the sintering negative pressure is 10.5kPa.

[0041] After sintering, high-chromium vanadium-titanium sintered ore with an alkalinity of 2.55 is obtained by whole-grain sieving. The yield rate of the whole sintering process is 75.43%, the vertical sintering speed is 27....

Embodiment 3

[0043] The method is similar to Example 1, the difference is:

[0044] (1) 5.0% ferroboron concentrate is added to the sintering raw material. The proportions of sintering return ore, high-chromium vanadium-titanium concentrate powder, ordinary iron concentrate powder and boron-iron concentrate are 13.32%, 12.41%, 49.28% and 5.00% of the total mass of sintering raw materials, respectively.

[0045] (2) Metallurgical lime, magnesite, and coke powder accounted for 12.23%, 3.00%, and 4.76% of the total mass of sintered raw materials respectively

[0046] (3) Carry out ignition and draft sintering, the ignition temperature is 1000°C, the ignition time is 1.5min, the ignition negative pressure is 5.0kPa, and the sintering negative pressure is 10.0kPa.

[0047] After sintering, high-chromium vanadium-titanium sintered ore with an alkalinity of 2.55 is obtained by whole-grain sieving. The yield rate of the whole sintering process is 76.30%, the vertical sintering speed is 28.84mm / m...

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Abstract

The invention provides a method for improving the quality of high-chromium vanadium and titanium sinter and belongs to the technical field of ferrous metallurgy. The method mainly comprises the steps that sintering return mines, high-chromium vanadium and titanium concentrate fines, ordinary iron ore concentrate powder, boron iron ore concentrate, metallurgical lime, magnesite, coke powder and other sintering raw materials are subjected to secondary atomization injection and blowing blending, wetting and pelletizing at a certain proportion; then distribution, ignition and sintering are conducted; and finally grain settlement and screening are conducted to obtain the high-chromium vanadium and titanium sinter good in metallurgical performance. The method has the characteristics of being simple in process, high in raw material adaptability, high in production efficiency, low in cost and the like. The quality of the high-chromium vanadium and titanium sinter and the sintering production efficiency can be improved remarkably; the method has important realistic significance for development and utilization of the high-chromium vanadium and titanium sinter and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a method for improving the quality of high-chromium vanadium-titanium sintered ore. Background technique [0002] Vanadium-titanium magnetite is a multi-element symbiotic iron ore mainly composed of iron, vanadium and titanium, accompanied by other valuable elements, and has high comprehensive utilization value. The reserves of vanadium-titanium magnetite resources in the world are relatively abundant, mainly distributed in a few countries such as Russia, the United States, China and South Africa. In recent years, with the rapid development of the economy, my country's demand for mineral products such as iron, vanadium and titanium has continued to increase. Therefore, it is extremely important to improve the comprehensive utilization technology level of vanadium-titanium-magnetite resources, which can provide an important resource guarantee for the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16
Inventor 储满生柳政根冯聪唐珏王峥赵伟王宏涛付小佼赵嘉琦陈双印汤雅婷李峰
Owner NORTHEASTERN UNIV
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