阅读说明：本技术 缩短电炉炼钢冶炼周期的装置和方法 (Device and method for shortening electric furnace steelmaking smelting period ) 是由 吴绍刚 荀凤超 王继州 黄敏 武脡鹰 李伟 张乐双 刘洋 潘静 李卫刚 赵运廷 于 2020-06-10 设计创作，主要内容包括：本发明提供一种缩短电炉炼钢冶炼周期的装置和方法。缩短电炉炼钢冶炼周期的装置,包括：制氧系统、压缩系统、储存系统、氧气站阀门室和电炉阀门站；所述电炉阀门站与所述电炉连通。缩短电炉炼钢冶炼周期的方法,包括：制氧系统生产氧气,然后输送至压缩系统对氧气进行压缩；经所述压缩系统处理后的氧气输入储存系统进行存储,然后通过氧气站阀门室一次调节来自所述储存系统的氧气压力；再通过电炉阀门站进行二次调节压力,然后送入电炉使用。本申请提供的装置和方法,能够缩短大型电炉炼钢冶炼周期。(The invention provides a device and a method for shortening an electric furnace steelmaking smelting period. The device for shortening the smelting period of electric furnace steel making comprises: the system comprises an oxygen generation system, a compression system, a storage system, an oxygen station valve chamber and an electric furnace valve station; the electric furnace valve station is communicated with the electric furnace. The method for shortening the smelting period of electric furnace steelmaking comprises the following steps: the oxygen generation system produces oxygen and then conveys the oxygen to the compression system to compress the oxygen; inputting the oxygen processed by the compression system into a storage system for storage, and then regulating the oxygen pressure from the storage system once through an oxygen station valve chamber; and then the pressure is secondarily regulated through an electric furnace valve station, and then the electric furnace is fed for use. The device and the method provided by the application can shorten the steelmaking smelting period of the large-scale electric furnace.)

1. A device for shortening the smelting period of electric furnace steel making is characterized by comprising: the system comprises an oxygen generation system, a compression system, a storage system, an oxygen station valve chamber and an electric furnace valve station;

the oxygen generation system is used for producing oxygen, the compression system is used for compressing the oxygen from the oxygen generation system, the storage system is used for storing the oxygen from the compression system, the oxygen station valve chamber is used for regulating the pressure of the oxygen from the storage system for the first time, and the electric furnace valve station is used for regulating the pressure of the oxygen after the oxygen is regulated for the second time through the oxygen station valve chamber;

the electric furnace valve station is communicated with the electric furnace.

2. The plant of claim 1, wherein the oxygen generation system comprises an air separation oxygen generation system, further configured to produce nitrogen and liquid argon;

preferably, the gas production rate of the oxygen generation system is 18000-20000m³/h。

3. The apparatus of claim 2, wherein the compression system comprises an oxygen compressor, a nitrogen compressor, and a liquid argon pump; the oxygen compressor is used for compressing the oxygen that comes from empty system oxygen system that divides of dividing, the nitrogen compressor is used for compressing and comes from empty nitrogen gas that divides system oxygen system divides, liquid argon pump is used for the vaporization to come from empty liquid argon that divides system oxygen system divides.

4. The apparatus of claim 2, wherein the storage system comprises an oxygen tank, a nitrogen tank, and an argon tank, all in communication with the compression system.

5. The apparatus of claim 2, further comprising an LF furnace-ladle-caster valve station for secondary regulation of argon pressure after primary regulation through the oxygen station valve chamber.

6. The apparatus according to any one of claims 1 to 5, wherein the electric furnace is provided with a plurality of lances communicating with the furnace valve station.

7. A method for shortening an electric furnace steelmaking smelting period is characterized by comprising the following steps:

the oxygen generation system produces oxygen and then conveys the oxygen to the compression system to compress the oxygen;

inputting the oxygen processed by the compression system into a storage system for storage, and then regulating the oxygen pressure from the storage system once through an oxygen station valve chamber;

and then the pressure is secondarily regulated through an electric furnace valve station, and then the electric furnace is fed for use.

8. The method of claim 7, further comprising:

conveying nitrogen produced by the oxygen production system to a compression system for compression, conveying liquid argon to the compression system for vaporization, and then inputting the liquid argon to a storage system for storage;

and the pressure of the nitrogen and argon from the storage system is adjusted through an oxygen station valve chamber for the first time, then the nitrogen is sent to carbon powder injection, purging and instrument user points for use, and the argon is used after the pressure is adjusted through an LF furnace-ladle-continuous casting machine valve station for the second time.

9. The method of claim 8, wherein after the primary adjustment through the oxygen station valve chamber, the oxygen pressure is 1.4 to 1.6MPa, the nitrogen pressure is 0.4 to 0.6MPa, and the argon pressure is 1.4 to 1.6 MPa;

preferably, after the secondary adjustment of the valve station of the LF furnace-ladle-continuous casting machine, the pressure of argon is 0.8-1.2 MPa;

preferably, the oxygen pressure is 0.8-1.4MPa after the secondary adjustment through the electric furnace valve station.

10. The method according to any one of claims 7 to 9, wherein the oxygen consumption per ton of steel of the electric furnace is 55 to 65m³/t。

Technical Field

The invention relates to the field of steel smelting, in particular to a device and a method for shortening an electric furnace steelmaking smelting period.

Background

The energy for modern electric furnace steel making consists of electric energy, chemical heat and physical heat, wherein the electric energy accounts for 34 percent, the chemical heat accounts for 40 percent and the physical heat accounts for 26 percent. The energy of the traditional electric furnace steel making is mainly electric energy, the smelting period is shortened, the rated power of a transformer is mainly increased, and high voltage is adopted for power supply. The core technology of electric furnace steelmaking is to shorten the smelting period to enable the smelting period to be matched and operated with a high-efficiency continuous casting machine and a continuous rolling machine. Particularly, the problem of controlling the smelting period of the electric furnace is solved because only when the smelting period is shortened to a critical value, the intermittent steel-making operation with high speed and fast pace can be coordinated with the continuous casting-steel rolling operation to form a stable steel manufacturing production flow, so that the electric furnace steel-making becomes a novel large-scale steel production method mainly aiming at recycling of steel scrap resources.

Therefore, how to shorten the smelting period of large-scale electric furnace steelmaking becomes a problem to be solved urgently in electric furnace steelmaking.

In view of this, the present application is specifically made.

Disclosure of Invention

The invention aims to provide a device and a method for shortening the smelting period of electric furnace steelmaking so as to solve the problems.

In order to achieve the above purpose, the invention adopts the following technical scheme:

a device for shortening the smelting period of electric furnace steelmaking comprises an oxygen making system, a compression system, a storage system, an oxygen station valve chamber and an electric furnace valve station;

the oxygen generation system is used for producing oxygen, the compression system is used for compressing the oxygen from the oxygen generation system, the storage system is used for storing the oxygen from the compression system, the oxygen station valve chamber is used for regulating the pressure of the oxygen from the storage system for the first time, and the electric furnace valve station is used for regulating the pressure of the oxygen after the oxygen is regulated for the second time through the oxygen station valve chamber;

the electric furnace valve station is communicated with the electric furnace

Preferably, the oxygen generation system comprises an air separation oxygen generation system, and is also used for producing nitrogen and liquid argon;

preferably, the gas production rate of the oxygen generation system is 18000-20000m³/h。

The air separation oxygen generation has the advantages that: can produce high-purity oxygen, nitrogen, argon and liquid oxygen, liquid nitrogen and liquid argon products, can operate safely and stably for a long time, and has low failure rate. The purity of oxygen required by electric furnace steelmaking is more than or equal to 98 percent, and no special requirement is made on the balance of 2 percent.

Preferably, the compression system comprises an oxygen compressor, a nitrogen compressor and a liquid argon pump; the oxygen compressor is used for compressing the oxygen that comes from empty system oxygen system that divides of dividing, the nitrogen compressor is used for compressing and comes from empty nitrogen gas that divides system oxygen system divides, liquid argon pump is used for the vaporization to come from empty liquid argon that divides system oxygen system divides.

Preferably, the storage system comprises an oxygen tank, a nitrogen tank, and an argon tank, all in communication with the compression system.

Preferably, the device further comprises an LF furnace-ladle-continuous casting machine valve station, wherein the LF furnace-ladle-continuous casting machine valve station is used for secondarily regulating the pressure of the argon gas subjected to primary regulation through the oxygen station valve chamber.

Preferably, the electric furnace is provided with a plurality of oxygen lances which are in communication with the electric furnace valve station.

A method for shortening an electric furnace steelmaking smelting period comprises the following steps:

the oxygen generation system produces oxygen and then conveys the oxygen to the compression system to compress the oxygen;

inputting the oxygen processed by the compression system into a storage system for storage, and then regulating the oxygen pressure from the storage system once through an oxygen station valve chamber;

and then the pressure is secondarily regulated through an electric furnace valve station, and then the electric furnace is fed for use.

Preferably, the method further comprises:

conveying nitrogen produced by the oxygen production system to a compression system for compression, conveying liquid argon to the compression system for vaporization, and then inputting the liquid argon to a storage system for storage;

and the pressure of the nitrogen and argon from the storage system is adjusted through an oxygen station valve chamber for the first time, then the nitrogen is sent to carbon powder injection, purging and instrument user points for use, and the argon is used after the pressure is adjusted through an LF furnace-ladle-continuous casting machine valve station for the second time.

Preferably, after the primary adjustment through a valve chamber of an oxygen station, the oxygen pressure is 1.4-1.6MPa, the nitrogen pressure is 0.4-0.6MPa, and the argon pressure is 1.4-1.6 MPa;

preferably, after the secondary adjustment of the valve station of the LF furnace-ladle-continuous casting machine, the pressure of argon is 0.8-1.2 MPa;

preferably, the oxygen pressure is 0.8-1.4MPa after the secondary adjustment through the electric furnace valve station.

Preferably, the oxygen consumption per ton steel of the electric furnace is 55-65m³/t。

Compared with the prior art, the invention has the beneficial effects that:

the device and the method for shortening the smelting period of the electric furnace steel making increase the chemical heat of the electric furnace through the matching of the oxygen generation system, the compression system, the storage system, the oxygen station valve chamber and the electric furnace valve station, effectively shorten the smelting period of the large electric furnace by more than 5 minutes, improve the efficiency and the production and reduce the production cost.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention.

FIG. 1 is a schematic view of an apparatus for shortening a smelting period in electric steelmaking provided in example 1.

Detailed Description

The terms as used herein:

"prepared from … …" is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

The conjunction "consisting of … …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of … …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when the range "1 ~ 5" is disclosed, the ranges described should be construed to include the ranges "1 ~ 4", "1 ~ 3", "1 ~ 2 and 4 ~ 5", "1 ~ 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.

In these examples, the parts and percentages are by mass unless otherwise indicated.

"part by mass" means a basic unit of measure indicating a mass ratio of a plurality of components, and 1 part may represent any unit mass, for example, 1g or 2.689 g. If we say that the part by mass of the component A is a part by mass and the part by mass of the component B is B part by mass, the ratio of the part by mass of the component A to the part by mass of the component B is a: b. alternatively, the mass of the A component is aK and the mass of the B component is bK (K is an arbitrary number, and represents a multiple factor). It is unmistakable that, unlike the parts by mass, the sum of the parts by mass of all the components is not limited to 100 parts.

"and/or" is used to indicate that one or both of the illustrated conditions may occur, e.g., a and/or B includes (a and B) and (a or B).

Embodiments of the present invention will be described in detail below with reference to specific examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.