CN211122396U

CN211122396U - Experimental device for survey coke reaction start temperature

Info

Publication number: CN211122396U
Application number: CN201920904367.4U
Authority: CN
Inventors: 孙睿; 王雅军; 赵永红; 江鑫
Original assignee: Baotou Iron and Steel Group Co Ltd
Current assignee: Baotou Iron and Steel Group Co Ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-07-28
Anticipated expiration: 2029-06-17

Abstract

The utility model discloses an experimental device for measuring the reaction starting temperature of coke, which comprises a reaction furnace, a reaction tank, a platform, a hoisting device, an electronic scale, an air inlet pipe, an exhaust pipe and a thermocouple sleeve; the utility model discloses an experimental apparatus of survey coke reaction start temperature, the survey is accurate, and simple structure easily operates, and the commonality is good, can extensively be used for the survey of different cokes, is favorable to extensive popularization and application.

Description

Experimental device for survey coke reaction start temperature

Technical Field

The utility model relates to the technical field of mechanical equipment, especially, relate to an experimental apparatus for survey coke reaction start temperature.

Background

The coke is an important raw material for blast furnace smelting, and plays four main roles of supplying heat, reducing agent for chemical reaction, carburizing and supporting a material column framework in steel smelting. At present, coke is used as a support of a material column, and plays a very important role in reducing resistance generated by gas upflow in a blast furnace body and maintaining the permeability in the iron-making blast furnace body by maintaining proper lumpiness. The evaluation of coke quality includes many aspects, and most of the steel enterprises at present pay more and more attention to the measurement and research of the performance evaluation index, the coke melting loss reaction initial temperature and the coke melting loss rate of coke in the blast furnace.

The coke dissolution reaction initiation temperature is also referred to as the coke onset reaction temperature and refers to the coke and CO₂The initial temperature of the initial reaction can reflect the reaction performance of the coke and gas in the blast furnace to a certain extent, and is closely related to the temperature of a hot reserve zone of the blast furnace, and the temperature of the hot reserve zone is a boundary of indirect reduction of the upper part of the iron oxide and direct reduction of the lower part of the iron oxide in the blast furnace, so that the reduction capability and heat exchange of the blast furnace are greatly influenced by the initial reaction temperature of the coke. Generally speaking, in the blast furnace smelting production, coke with high reaction starting temperature can be put into the blast furnace smelting production to increase the temperature of a heat storage area, so that the indirect reduction ratio is relatively increased, the utilization rate of coal gas is increased, and the fuel ratio is reduced; on the other hand, for the modern blast furnace metallurgical technology, the temperature characteristic of the blast furnace can be improved by improving the reducing capability of iron ore, the distribution of furnace burden and air flow is optimized, and the utilization rate of coal gas is improved to be close to the equilibrium state. Under the condition, the temperature of the hot storage area in the furnace is reduced, so that the actual and balanced partial pressure difference of CO is increased, the reduction power is enhanced to improve the efficiency of the blast furnace, the initial reaction temperature of coke is reduced, the consumption of reducing agents in the blast furnace can be reduced, and the utilization rate of top gas is improved. Therefore, the use of cokes having different reaction start temperatures has a great influence on the production of the blast furnace, and the use of cokes having different reaction start temperatures varies depending on the actual production conditions. Therefore, accurate determination of the reaction start temperature of coke is required to meet the requirements of different blast furnaces.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a device for accurately measuring the coke reaction start temperature.

In order to realize the aim, the utility model provides an experimental device for measuring the reaction starting temperature of coke, which comprises a reaction furnace, a reaction tank, a platform, a hoisting device, an electronic scale, an air inlet pipe, an exhaust pipe and a thermocouple sleeve; a reaction tank is arranged in a hearth of the reaction furnace, and a platform which can rotate in the horizontal direction is arranged above the hearth and the reaction tank; an electronic scale and a hoisting device are arranged on the platform, and the lower part of the hoisting device is connected with the reaction tank; the reaction tank comprises an air inlet pipe, an air outlet pipe and a thermocouple sleeve;

in the preferred embodiment of the present invention, the electronic scale is connected to the computer, and the electronic scale inputs the output signal to the computer, records the weight of the reaction tank by using the computer, and draws the dynamic weightlessness curve and the calculated instantaneous dynamic weightlessness rate and weightlessness ratio;

scheme more than adopting, the utility model discloses an experimental apparatus of survey coke reaction start temperature has following technological effect:

1. the utility model discloses an experimental device for survey coke reaction start temperature can accurately survey different coke and CO₂The reaction starting temperature of the method provides reference for the use and operation of the coke smelted by the blast furnace, is beneficial to reducing the cost of the blast furnace smelting and improving the efficiency;

2. the experimental device for measuring the reaction starting temperature of the coke has simple structure, easy operation and convenient use, and is beneficial to popularization and application;

to sum up, the utility model discloses an experimental apparatus of survey coke reaction start temperature, the survey is accurate, and simple structure easily operates, and the commonality is good, can extensively be used for the survey of different cokes, is favorable to extensive popularization and application.

The conception, specific structure and technical effects of the present invention will be further described with reference to the accompanying drawings and specific embodiments, so as to fully understand the objects, features and effects of the present invention.

Drawings

FIG. 1 is a schematic structural view of the experimental apparatus of the present invention;

in the figure, 1, a reaction furnace; 2. a platform; 3. hoisting the device; 4. an electronic scale; 5. a reaction tank; 6. a thermowell; 7. an air inlet pipe; 8. and (4) exhausting the gas.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings for clarity and understanding of the technical contents. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

As shown in figure 1, the experimental device for measuring the reaction starting temperature of coke comprises a reaction furnace 1, a reaction tank 5, a platform 2, a hoisting device 3, an electronic scale 4, an air inlet pipe 7, an exhaust pipe 8 and a thermocouple well 6; a reaction tank 5 is arranged in a hearth of the reaction furnace 1, and a platform 2 which can rotate in the horizontal direction is arranged above the hearth and the reaction tank 5; an electronic scale 4 and a hoisting device 3 are arranged on the platform 2, and the lower part of the hoisting device 3 is connected with a reaction tank 5; the reaction tank 5 comprises an air inlet pipe 7, an air outlet pipe 8 and a thermocouple well 6; the electronic scale 4 is connected with a computer, the output signal is input into a computer end, the computer is utilized to record the weight of the reaction tank 5, and a dynamic weightlessness curve and the calculated instantaneous dynamic weightlessness rate and weightlessness ratio are drawn;

when the coke sample testing device works, firstly, the coke sample to be tested is subjected to processes of division, crushing, sieving and the like to prepare the coke into 23-25 mm blocky coke; a layer of high-alumina balls with the height of about 100mm is paved at the bottom of the reaction tank 5, a sieve plate is placed on the high-alumina balls, and 200g +/-0.5 g of the blocky coke is weighed and loaded into the reaction tank 5; then the reaction tank 5 is connected with the hoisting device 3 and hoisted on the electronic scale 4 of the platform 2, and the reaction tank 5 is connected with the electronic scale 4Placing the mixture into a hearth of a reaction furnace 1; an air inlet pipe 7 and an air outlet pipe 8 of the reaction tank 5 are respectively connected with an air inlet system and an air outlet system, and a temperature thermocouple is inserted into a thermocouple well 6 of the reaction tank 5; heating, introducing N when the reaction starts₂Protection, introducing CO after the temperature reaches 600 DEG C₂，N₂And CO₂The air flow speed is 5L/min, the electronic scale 4 is connected with the computer, and the output signal is input into the computer end;

recording the weight of the reaction tank 5 by using a computer, drawing a dynamic weight loss curve and calculating the instantaneous dynamic weight loss rate and the weight loss rate;

and (3) integrating the weight loss curve and the dynamic weight loss rate of the dynamic graph recorded by the computer, when the instantaneous dynamic weight loss rate is more than 0.2g/min and the weight loss rate is more than 0.2%, the reaction is started, and the actual temperature of the reaction tank displayed by the thermocouple at the moment is recorded, so that the reaction starting temperature of the coke can be obtained.

The coke initial reaction temperature was measured for A, B, C types of cokes using the experimental apparatus of the present embodiment, and the measurement results were a: 980 ℃ and B: 1000 ℃, C: 1020 ℃ and standard values (A: 982 ℃, B: 999 ℃ and C: 1021 ℃), the error is within 0.2 percent, and the determination accuracy is high; during operation, an operator only needs to put a coke sample to be measured into the reaction tank 5, heat the coke sample, and the computer records the heating process and the weight of the reaction tank 5, so that the reaction starting temperature of the coke can be obtained, and the operation is convenient.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. An experimental device for measuring the reaction starting temperature of coke is characterized by comprising a reaction furnace (1), a reaction tank (5), a platform (2), a hoisting device (3), an electronic scale (4), an air inlet pipe (7), an exhaust pipe (8) and a thermocouple well (6); a reaction tank (5) is arranged in a hearth of the reaction furnace (1), and a platform (2) capable of rotating in the horizontal direction is arranged above the hearth and the reaction tank (5); an electronic scale (4) and a hoisting device (3) are arranged on the platform (2), and the lower part of the hoisting device (3) is connected with a reaction tank (5); the reaction tank (5) comprises an air inlet pipe (7), an air outlet pipe (8) and a thermocouple well (6).