WO2017202119A1

WO2017202119A1 - Reduction smelting system and reduction smelting method for vanadium-titanium magnetite ore or ilmenite

Info

Publication number: WO2017202119A1
Application number: PCT/CN2017/077358
Authority: WO
Inventors: 尉克俭; 卢笠渔; 王树清; 郑步东; 李曰荣; 黎敏; 吕东; 邬传谷; 宋珍珍; 孙海阔; 徐小锋
Original assignee: 中国恩菲工程技术有限公司
Priority date: 2016-05-23
Filing date: 2017-03-20
Publication date: 2017-11-30

Abstract

A reduction smelting system (10) and reduction smelting method for vanadium-titanium magnetite ore or ilmenite. The reduction smelting system (10) for vanadium-titanium magnetite ore or ilmenite comprises: a rotary kiln (101) used for pre-reducing magnetically separated vanadium-titanium magnetite ore or ilmenite, the rotary kiln (101) being provided with a first feeding port, a calcine outlet, and a burner nozzle mounting port; a burner nozzle used for jetting flames into a kiln cavity of the rotary kiln, the burner nozzle being disposed at the burner nozzle mounting port; an electric furnace (102), the electric furnace (102) being provided with a second feeding port, an iron discharging port, a slag discharging port, and a smoke outlet; and a hot material conveying apparatus (103), one end of the hot material conveying apparatus (103) being connected to the calcine outlet, and the other end of the hot material conveying apparatus (103) being connected to second feeding port.

Description

Vanadium-titanium magnetite or ilmenite reduction smelting system and reduction smelting method

Technical field

The invention relates to the field of metallurgy, in particular to a vanadium-titanium magnetite or ilmenite reduction smelting system, and to a vanadium-titanium magnetite or ilmenite reduction smelting method.

Background technique

In the prior art, vanadium titano-magnetite or ilmenite is subjected to reduction smelting using a blast furnace or a rotary hearth furnace. However, blast furnaces have the disadvantage of high operating costs, resulting in poor economic returns. The volume of the rotary hearth furnace is limited, and it is impossible to achieve large-scale production.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, the present invention proposes a vanadium-titanium magnetite or ilmenite reduction smelting system having the advantages of high processing capacity, low operating cost, and low energy consumption.

The invention also provides a vanadium titano-magnetite or ilmenite reduction smelting method implemented by the vanadium-titanium magnetite or ilmenite reduction smelting system.

A vanadium titano-magnetite or ilmenite reduction smelting system according to an embodiment of the first aspect of the present invention includes: a rotary kiln for prereducing magnetically selected vanadium titano-magnetite or ilmenite, the rotary kiln having a feed port, a calcine outlet and a burner mounting port; a burner for injecting a flame into the kiln cavity of the rotary kiln, the burner being disposed at the burner mounting opening; the electric furnace, the electric furnace a second feed port, a tapping port, a slag port, and a flue gas outlet; and a hot material conveying device, one end of the hot material conveying device is connected to the calcine outlet, and the other end of the hot material conveying device Connected to the second feed port.

The vanadium titano-magnetite or ilmenite reduction smelting system according to the embodiment of the invention has the advantages of large processing capacity, low operating cost and low energy consumption.

Further, the vanadium titano-magnetite or ilmenite reduction smelting system according to the above embodiment of the present invention may further have the following additional technical features:

According to an embodiment of the invention, the calcine outlet is located above the second feed port, and the hot material delivery device is disposed obliquely.

According to an embodiment of the invention, the burner has a coal inlet, an air inlet and a flame outlet, the central axis of the flame outlet being arranged parallel to the central axis of the rotary kiln.

Utilizing vanadium titano-magnetite or ilmenite according to the first aspect of the invention according to an embodiment of the second aspect of the invention The vanadium titano-magnetite or ilmenite reduction smelting method implemented by the original smelting system comprises the following steps:

Adding magnetically selected vanadium-titanium magnetite or ilmenite and a reducing agent from the first feed port to the rotary kiln in a certain ratio, and spraying the flame into the rotary kiln by using the burner In order to pre-reduction of vanadium titano-magnetite or ilmenite in the rotary kiln and obtain a calcine;

The calcine is conveyed into the electric furnace by the hot material conveying device, and further reduced by the electric furnace, and the generated vanadium-containing molten iron or molten iron is discharged from the iron discharge port, and the generated slag containing titanium oxide is The slag discharge port is discharged, and the generated carbon monoxide-containing flue gas is discharged from the flue gas outlet.

According to an embodiment of the present invention, the burner has a coal inlet, an air inlet and a flame outlet, and coal is added into the burner through the coal inlet, and the burner is introduced into the burner through the air inlet. An oxygen-containing gas is injected through the flame outlet into the rotary kiln to a flame having a length of 30 to 40 meters.

According to an embodiment of the invention, the reducing agent is coal.

DRAWINGS

1 is a schematic view showing the structure of a vanadium titano-magnetite or ilmenite reduction smelting system according to an embodiment of the present invention.

Reference mark:

Vanadium-titanium magnetite or ilmenite reduction smelting system 10, rotary kiln 101, electric furnace 102, hot material conveying device 103

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

A vanadium titano-magnetite or ilmenite reduction smelting system 10 in accordance with an embodiment of the present invention is described below with reference to the accompanying drawings. As shown in FIG. 1, a vanadium titano-magnetite or ilmenite reduction smelting system 10 according to an embodiment of the present invention includes a rotary kiln 101 for pre-reducing magnetically selected vanadium titano-magnetite or ilmenite, for A burner (not shown) for injecting a flame into the kiln cavity of the rotary kiln 101, an electric furnace 102, and a hot material delivery device 103 are sprayed.

The rotary kiln 101 has a first feed port, a calcine outlet, and a burner mounting port, and the burner is disposed at the burner mounting port. The electric furnace 102 has a second feed port, a tapping port, a slag tap, and a flue gas outlet. One end of the hot material delivery device 103 is connected to the calcine outlet, and the other end of the hot material delivery device 103 is connected to the second feed port.

The operation of the vanadium titano-magnetite or ilmenite reduction smelting system 10 according to an embodiment of the present invention will be briefly described below with reference to FIG.

First, the magnetically selected vanadium-titanium magnetite or ilmenite and a reducing agent are added to the rotary kiln 101 from the first feed port in a certain ratio, and a flame is sprayed into the rotary kiln 101 by the burner to make a turn. Pre-reduction of vanadium-titanium magnetite or ilmenite in kiln 101 and obtaining calcine;

The calcine is conveyed into the electric furnace 102 by the hot material conveying device 103, and further reduced by the electric furnace 102. The produced vanadium-containing molten iron or molten iron is discharged from the iron discharge port, and the generated titanium oxide-containing slag is discharged from the slag discharge port, and the generated carbon monoxide-containing flue gas is discharged from the flue gas outlet.

The vanadium titano-magnetite or ilmenite reduction smelting system 10 according to the embodiment of the present invention can fully utilize the rotary kiln 101 by pre-reducing the magnetically selected vanadium-titanium magnetite or ilmenite by using the rotary kiln 101. The pre-reduction treatment of ore is large, the reduction is easy to control, the equipment can be large-sized, and the equipment is reliable.

The vanadium titano-magnetite or ilmenite reduction smelting system 10 according to the embodiment of the present invention can deeply utilize the electric furnace 102 to deeply reduce the calcination, thereby making it possible to fully utilize the electric furnace 102 with high thermal efficiency, good airtightness, and large equipment power. Large processing capacity, easy to achieve scale, easy to match with rotary kiln 101, long service life, high operating rate, convenient operation, high recovery rate of molten metal.

Moreover, since the "hot charging heat transfer" of the calcine produced by the rotary kiln 101 is added to the electric furnace 102, the power consumption per unit calcination is greatly reduced, and the electric energy is reduced.

Therefore, the vanadium titano-magnetite or ilmenite reduction smelting system 10 according to the embodiment of the present invention has the advantages of large processing capacity, low operating cost, low energy consumption, and the like.

As shown in FIG. 1, a vanadium titano-magnetite or ilmenite reduction smelting system 10 according to an embodiment of the present invention includes a rotary kiln 101 for pre-reducing magnetically selected vanadium titano-magnetite or ilmenite, for A burner (not shown) for injecting a flame into the kiln cavity of the rotary kiln 101, an electric furnace 102, and a hot material delivery device 103 are sprayed.

The rotary kiln 101 has a first feed port, a calcine outlet, and a burner mounting port. The magnetically selected vanadium-titanium magnetite or ilmenite and a reducing agent are fed into the rotary kiln 101 from the first feed port in a certain ratio. The magnetically selected vanadium-titanium magnetite or ilmenite and the reducing agent may be uniformly mixed first, and then added to the rotary kiln 101 from the first feed port. Further, the magnetically selected vanadium titano-magnetite or ilmenite and a reducing agent may be directly introduced into the rotary kiln 101 from the first feed port.

Specifically, the reducing agent may be coal.

The burner is provided at the burner mounting opening. In one embodiment of the invention, the burner has a coal inlet, an air inlet, and a flame outlet. Wherein, coal is introduced into the burner through the coal inlet, an oxygen-containing gas is introduced into the burner through the air inlet, and a flame is sprayed into the rotary kiln 101 through the flame outlet.

Advantageously, the flame of the burner is from 30 to 40 meters in length.

In one example of the invention, the central axis of the flame outlet of the burner is arranged parallel to the central axis of the rotary kiln 101. Preferably, the central axis of the flame exit coincides with the central axis of the rotary kiln 101. Thereby, the structure of the rotary kiln 101 can be made more reasonable.

The electric furnace 102 has a second feed port, a tapping port, a slag tap, and a flue gas outlet. One end of the hot material delivery device 103 is connected to the calcine outlet, and the other end of the hot material delivery device 103 is connected to the second feed port. The high temperature baking material thus produced from the rotary kiln 101 is introduced into the electric furnace 102 through the hot material conveying device 103.

In some examples of the invention, the calcine outlet is located above the second feed port and the hot material delivery device 103 is disposed obliquely. Thereby, the calcination of the calcine itself can be utilized to transport the calcine.

In the electric furnace 102, oxides of metals such as iron and vanadium are further reduced. At the same time, in the molten pool of the electric furnace 102, the high-temperature molten iron, vanadium metal and slag are separated by the upper and lower layers under the action of gravity. Wherein, the lower layer of molten iron or vanadium-containing molten iron is discharged from the iron discharge port and sent to the refining system, and the upper layer of titanium oxide-containing slag is discharged from the slag discharge port as a raw material for titanium white powder production or titanium extraction, and the carbon monoxide containing flue gas is from The flue gas outlet is released and sent to the power generation system for power generation.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or in one piece; it may be a mechanical connection, or it may be an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship between two elements. Unless otherwise expressly defined. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, in the case of non-contradictory situations, A person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A vanadium-titanium magnetite or ilmenite reduction smelting system, characterized in that it comprises:

a rotary kiln for prereducing magnetically selected vanadium titano-magnetite or ilmenite, the rotary kiln having a first feed port, a calcine outlet and a burner mounting port;

a burner for injecting a flame into a kiln cavity of the rotary kiln, the burner being disposed at the burner mounting opening;

An electric furnace having a second feed port, an iron discharge port, a slag discharge port, and a flue gas outlet;

a hot material conveying device, one end of the hot material conveying device is connected to the calcine outlet, and the other end of the hot material conveying device is connected to the second feeding port.
The vanadium titano-magnetite or ilmenite reduction smelting system according to claim 1, wherein the calcine outlet is located above the second feed port, and the hot material delivery device is disposed obliquely.
The vanadium titano-magnetite or ilmenite reduction smelting system according to claim 1, wherein the burner has a coal inlet, an air inlet and a flame outlet, a central axis of the flame outlet and the rotation The central axes of the kiln are arranged in parallel.
A vanadium titano-magnetite or ilmenite reduction smelting process implemented by the vanadium titano-magnetite or ilmenite reduction smelting system according to any one of claims 1 to 3, characterized in that it comprises the following steps :

Adding magnetically selected vanadium-titanium magnetite or ilmenite and a reducing agent from the first feed port to the rotary kiln in a certain ratio, and spraying the flame into the rotary kiln by using the burner In order to pre-reduction of vanadium titano-magnetite or ilmenite in the rotary kiln and obtain a calcine;

The calcine is conveyed into the electric furnace by the hot material conveying device, and further reduced by the electric furnace, and the generated vanadium-containing molten iron or molten iron is discharged from the iron discharge port, and the generated slag containing titanium oxide is The slag discharge port is discharged, and the generated carbon monoxide-containing flue gas is discharged from the flue gas outlet.
The vanadium titano-magnetite or ilmenite reduction smelting method according to claim 4, wherein the burner has a coal inlet, an air inlet and a flame outlet, and the burner is passed through the coal inlet Coal is added therein, an oxygen-containing gas is introduced into the burner through the air inlet, and a flame having a length of 30 to 40 meters is sprayed into the rotary kiln through the flame outlet.
The vanadium titano-magnetite or ilmenite reduction smelting method according to claim 4, wherein the reducing agent is coal.