阅读说明：本技术 一种预还原烧结杯试验装置及试验方法 (Pre-reduction sintering cup test device and test method ) 是由 刘杰 周明顺 朱建伟 宫作岩 翟立委 张辉 徐礼兵 李建军 马贤国 董刚 于 2019-09-30 设计创作，主要内容包括：本发明公开一种预还原烧结杯试验装置及试验方法,所述预还原烧结杯杯体和点火器通过螺旋扣互相配合密封连接,所述点火器由升降旋转机构驱动；所述点火器顶部密封,通过顶部设置的旋转轴连通进气管；所述进气管连接还原气进气管道和配气加热系统；所述配气加热系统包括主管道,空气由主管道进入,所述主管道按气体流动方向还依次连接氧气进气管道、氮气进气管道、气体混合器和气体加热炉。(The invention discloses a pre-reduction sintering cup test device and a test method, wherein a pre-reduction sintering cup body and an igniter are mutually matched and hermetically connected through a turnbuckle, and the igniter is driven by a lifting rotating mechanism; the top of the igniter is sealed and is communicated with the air inlet pipe through a rotating shaft arranged at the top; the gas inlet pipe is connected with a reducing gas inlet pipeline and a gas distribution heating system; the distribution heating system comprises a main pipeline, air enters from the main pipeline, and the main pipeline is sequentially connected with an oxygen inlet pipeline, a nitrogen inlet pipeline, a gas mixer and a gas heating furnace according to the gas flowing direction.)

1. The utility model provides a reduce sintering cup test device in advance, includes reduce sintering cup body, some firearm, display measuring apparatu and computer acquisition control system in advance, its characterized in that: the pre-reduction sintering cup body and the igniter are mutually matched and hermetically connected through a turnbuckle, and the igniter is driven by a lifting rotating mechanism; the top of the igniter is sealed and is communicated with the air inlet pipe through a rotating shaft arranged at the top; the gas inlet pipe is connected with a reducing gas inlet pipeline and a gas distribution heating system; the distribution heating system comprises a main pipeline, air enters from the main pipeline, and the main pipeline is sequentially connected with an oxygen inlet pipeline, a nitrogen inlet pipeline, a gas mixer and a gas heating furnace according to the gas flowing direction.

2. The pre-reduced sinter cup test device of claim 1, wherein: and a measurement control instrument is arranged on the reducing gas inlet pipeline.

3. The pre-reduced sinter cup test device of claim 1, wherein: and a main pipeline of the air distribution heating system is provided with an electromagnetic switch, a pressure measuring instrument and an air flow measuring controller.

4. The pre-reduced sinter cup test device of claim 1, wherein: the oxygen inlet pipeline and the nitrogen inlet pipeline are respectively provided with an oxygen adjusting and controlling device and a nitrogen adjusting and controlling device.

5. The pre-reduced sinter cup test device of claim 1, wherein: the reduction sintering cup body is provided with at least 3 temperature measuring points, gas component measuring points and gas pressure measuring points which comprise an upper part, a middle part and a lower part, the temperature, the pressure and the components are measured on line in real time, and data are fed back to a computer acquisition control system to form a series of charts.

6. A test method of the pre-reduced beaker test apparatus according to any of claims 1 to 5, characterized in that: after the sintering mixture is distributed into the cup body of the pre-reduction sintering cup, air is introduced into a gas mixer through a computer acquisition control system, a display measuring instrument control electromagnetic switch, a pressure measuring instrument and an air flow measuring controller, then the air is heated to 800 ℃ by a gas heating furnace, introduced into an igniter and mixed and ignited with reducing gas introduced through the control of the measuring controller, after ignition, the reducing gas is firstly closed, and then a gas distribution heating system is closed; then, the igniter descends through a lifting rotating mechanism and is in full-sealing connection with the cup body of the pre-reduction sintering cup, reducing gas is introduced, meanwhile, nitrogen and oxygen are respectively introduced into a gas mixer through a nitrogen adjusting and controller and an oxygen adjusting and controller, automatic gas distribution is carried out through a computer acquisition control system and a display measuring instrument according to set gas components, the prepared gas is heated to 800 ℃ through a gas heating furnace and is introduced into the igniter for pre-reduction sintering, after sintering is finished, the reducing gas is closed, the gas heating furnace is closed, the oxygen and oxygen adjusting and controller are closed, the nitrogen is ensured to be introduced according to the flow required by the test through the nitrogen adjusting and controller, after the integral temperature of the sintering ore is detected to be reduced to be below 100 ℃ through a temperature measuring point arranged on the cup body, the lifting rotating mechanism is controlled to separate the igniter from the cup body of the pre-reduction sintering cup, and closing the nitrogen regulation and control device and the nitrogen, and finishing the pre-reduction sintering test.

7. The method of testing a pre-reduced fritted cup test apparatus of claim 6 wherein: the reducing gas is liquefied gas or coal gas.

Technical Field

The invention belongs to the field of ferrous metallurgy, relates to a pre-reduction test method, and particularly relates to a pre-reduction sintering cup test device and a test method.

Background

In the iron and steel industry, the energy consumption of iron making accounts for more than 50% of the total energy consumption of iron and steel production, and how to effectively reduce the energy consumption of a blast furnace becomes an important task for enterprises and society. With the development of large-scale blast furnaces, the whole system of the blast furnace production line is a lifeline, so that the safety, normality and orderly development of the lifeline are guaranteed, the huge energy consumption is reduced, and the production line is more and more consistent pursued by all ironmaking workers. How to reduce the coke ratio and fuel ratio which account for about 75% of the total energy consumption of the blast furnace and about 85% of the total fuel consumption is particularly important in energy conservation and consumption reduction.

At present, the research of pre-reduction sintering is just started worldwide, and similar research is not found in the journal. The pre-reduction sintering is different from direct reduction, and aims to share partial pressure of a blast furnace and partially realize the reduction process of raw materials existing in the blast furnace in the sintering process in one step in advance. The method has the effects of improving the grade of raw materials fed into the blast furnace, shortening the production period of the blast furnace, improving the smooth operation of the blast furnace, and discussing the feasibility of replacing coke with other common coal in the sintering process so as to reduce the coke consumption of the blast furnace.

Due to the lack of corresponding basic research means of the pre-reduction technology, a common sintering cup test system cannot solve the problems of reoxidation and over-fusion bonding of the pre-reduced sintered ore and series requirements of pre-reduction sintering on gas properties, temperature, pressure and the like, which seriously restrict the research and development of the pre-reduced sintered ore, and a set of pre-reduction sintering test device and an operation method with operability and popularization are urgently needed to be constructed, so that the development of the domestic pre-reduction sintering basic research is promoted.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to solve the technical problem that pre-reduction sintering has important significance on energy conservation and emission reduction work in the steel industry and is an important technology for future steel development. However, due to the characteristics of the pre-reduction sintering technology, the pre-reduction sintering technology is in a research stage of a laboratory at home and abroad at present, and because the pre-reduction sintering is mainly in a reducing atmosphere, the conventional sintering cup test system is mainly in an oxidizing atmosphere at present, the requirements of the pre-reduction sintering technology cannot be met, and no mature basic research means exists at home and abroad at present. The invention is designed completely according to the requirements of the pre-reduction sintering technology, completely solves the key problems in the pre-reduction sintering test from aspects of adjustable gas components, pressure and temperature, complete sealing of an igniter and a sintering cup, nitrogen protection, computer intelligent control and the like, reduces the reoxidation problem of sintering ores to the maximum extent, prevents explosion during pre-reduction sintering and the like, and provides the most advanced research means for the research and exploration of the pre-reduction sintering.

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

the utility model provides a reduce sintering cup test device in advance, includes reduce sintering cup body, some firearm, display measuring apparatu and computer acquisition control system in advance, its characterized in that: the pre-reduction sintering cup body and the igniter are mutually matched and hermetically connected through a turnbuckle, and the igniter is driven by a lifting rotating mechanism; the top of the igniter is sealed and is communicated with the air inlet pipe through a rotating shaft arranged at the top; the gas inlet pipe is connected with a reducing gas inlet pipeline and a gas distribution heating system; the distribution heating system comprises a main pipeline, air enters from the main pipeline, and the main pipeline is sequentially connected with an oxygen inlet pipeline, a nitrogen inlet pipeline, a gas mixer and a gas heating furnace according to the gas flowing direction.

And a measurement control instrument is arranged on the reducing gas inlet pipeline.

And a main pipeline of the air distribution heating system is provided with an electromagnetic switch, a pressure measuring instrument and an air flow measuring controller.

The oxygen inlet pipeline and the nitrogen inlet pipeline are respectively provided with an oxygen adjusting and controlling device and a nitrogen adjusting and controlling device.

The reduction sintering cup body is provided with at least 3 temperature measuring points, gas component measuring points and gas pressure measuring points which comprise an upper part, a middle part and a lower part, the temperature, the pressure and the components are measured on line in real time, and data are fed back to a computer acquisition control system to form a series of charts.

A pre-reduction sintering cup test method is characterized in that: after the sintering mixture is distributed into the cup body of the pre-reduction sintering cup, air is introduced into a gas mixer through a computer acquisition control system, a display measuring instrument control electromagnetic switch, a pressure measuring instrument and an air flow measuring controller, then the air is heated to 800 ℃ by a gas heating furnace, introduced into an igniter and mixed and ignited with reducing gas introduced through the control of the measuring controller, after ignition, the reducing gas is firstly closed, and then a gas distribution heating system is closed; then, the igniter descends through a lifting rotating mechanism and is in full-sealing connection with the cup body of the pre-reduction sintering cup, reducing gas is introduced, meanwhile, nitrogen and oxygen are respectively introduced into a gas mixer through a nitrogen adjusting and controller and an oxygen adjusting and controller, automatic gas distribution is carried out through a computer acquisition control system and a display measuring instrument according to set gas components, the prepared gas is heated to 800 ℃ through a gas heating furnace and is introduced into the igniter for pre-reduction sintering, after sintering is finished, the reducing gas is closed, the gas heating furnace is closed, the oxygen and oxygen adjusting and controller are closed, the nitrogen is ensured to be introduced according to the flow required by the test through the nitrogen adjusting and controller, after the integral temperature of the sintering ore is detected to be reduced to be below 100 ℃ through a temperature measuring point arranged on the cup body, the lifting rotating mechanism is controlled to separate the igniter from the cup body of the pre-reduction sintering cup, and closing the nitrogen regulation and control device and the nitrogen, and finishing the pre-reduction sintering test.

The invention has the beneficial effects that: the invention can realize the automatic adjustment of various gas components in the sintering process, grope out the optimal oxygen partial pressure according to different raw material conditions and test requirements, thereby exploring the optimal atmosphere control range, and after the sintering is finished, controlling the nitrogen content, thereby realizing that the pre-sintered ore is not reoxidized; and through setting up the heating furnace, can realize the hot-blast sintering of prereduction, further improve the quality of prereduction sintering deposit. The pressure of the gas is adjustable, high-pressure sintering can be realized, and the productivity of pre-reduction sintering is further improved. The rotary sealing connection of the igniter and the sintering cup body can thoroughly isolate the influence of air leakage on sintering, and the influence of human factors can be reduced to the minimum through the intelligent control of big data of a computer.

Drawings

FIG. 1 is a schematic diagram of a pre-reduction sinter pot test setup;

in the figure, 1 air, 2 electromagnetic switches, 3 pressure measuring instruments, 4 air flow measuring controllers, 5 nitrogen regulating and controlling instruments, 6 nitrogen, 7 oxygen, 8 oxygen regulating and controlling instruments, 9 gas mixers, 10 gas heating furnaces, 11 reducing gas, 12 measuring and controlling instruments, 13 lifting and rotating mechanisms, 14 igniters, 15 pre-reducing sintering cup bodies, 16 display measuring instruments, 17 computer acquisition and control systems and 18 rotating shafts.

Detailed Description

The following description is given with reference to specific examples:

a pre-reduction sintering cup test device comprises a pre-reduction sintering cup body 15, an igniter 14, a display measuring instrument 16 and a computer acquisition control system 17, wherein the pre-reduction sintering cup body 15 and the igniter 14 are mutually matched and hermetically connected through a turnbuckle, and the igniter 14 is driven by a lifting rotating mechanism 13; the top of the igniter 14 is sealed and is communicated with an air inlet pipe through a rotating shaft 18 arranged at the top; the gas inlet pipe is connected with a reducing gas inlet pipeline and a gas distribution heating system; the distribution heating system comprises a main pipeline, air enters from the main pipeline, and the main pipeline is sequentially connected with an oxygen inlet pipeline, a nitrogen inlet pipeline, a gas mixer 9 and a gas heating furnace 10 according to the gas flowing direction.

And a measurement controller 12 is arranged on the reducing gas inlet pipeline.

The main pipeline of the distribution heating system is provided with an electromagnetic switch 2, a pressure measuring instrument 3 and an air flow measuring controller 4.

The oxygen inlet pipeline and the nitrogen inlet pipeline are respectively provided with an oxygen adjusting and controlling device 8 and a nitrogen adjusting and controlling device 5.

The reduction sintering cup body 15 is provided with at least 3 temperature measuring points, gas component measuring points and gas pressure measuring points which comprise an upper part, a middle part and a lower part, the temperature, the pressure and the components are measured on line in real time, and data are fed back to the computer acquisition control system 17 to form a series of charts.