阅读说明：本技术 一种用于欧冶炉铁口氧枪系统 (Iron notch oxygen lance system for Europe smelting furnace ) 是由 季书民 邹庆峰 于 2021-08-25 设计创作，主要内容包括：本发明公开了一种用于欧冶炉铁口氧枪系统,热电偶通过在氧枪上部开设的热电偶孔插入到氧枪内部并接触到氧枪枪头；热电偶的信号传输通过温度传输装置以及温度显示仪传输和显示；氧枪外部间隔套装设置着压缩空气管,压缩空气管前端外部由内而外依次固定套装着螺纹钢丝层以及石棉绳层,压缩空气管依次通过压缩空气阀一、压缩空气压力显示仪、压缩空气流量显仪、压缩空气阀二与压缩空气源相连；氧枪的氧气进口依次通过氧气输送胶管、氧气阀一、氧气压力显示仪、氧气流量仪、氧气阀二与氧气源相连。其结构简单、操作简便、工作可靠、能够快速冷却快速将欧冶炉气化炉炉缸铁口与风口烧通,缩短处理时间,提高作业效率,确保安全生产。(The invention discloses an iron notch oxygen lance system for an Ou-smelting furnace.A thermocouple is inserted into an oxygen lance through a thermocouple hole formed in the upper part of the oxygen lance and contacts the head of the oxygen lance; the signal transmission of the thermocouple is transmitted and displayed through a temperature transmission device and a temperature display instrument; compressed air pipes are sleeved outside the oxygen lance at intervals, a threaded steel wire layer and an asbestos rope layer are fixedly sleeved outside the front end of each compressed air pipe from inside to outside in sequence, and the compressed air pipes are connected with a compressed air source sequentially through a compressed air valve I, a compressed air pressure display instrument, a compressed air flow display instrument and a compressed air valve II; an oxygen inlet of the oxygen lance is connected with an oxygen source sequentially through an oxygen delivery rubber tube, an oxygen valve I, an oxygen pressure display instrument, an oxygen flow instrument and an oxygen valve II. The device has the advantages of simple structure, simple and convenient operation, reliable work, quick cooling, quick through burning of the hearth iron notch and the air port of the gasification furnace of the pyrometallurgical furnace, treatment time shortening, operation efficiency improvement and safety production guarantee.)

1. An iron notch oxygen lance system for an Ou-smelting furnace comprises an oxygen lance (1), a thermocouple (2), a temperature transmission device (3), a temperature display instrument (4), a compressed air conveying rubber tube (5), a compressed air valve I (6), a compressed air pressure display instrument (7), a compressed air flow display instrument (8), a compressed air valve II (9), a compressed air source (10), an oxygen conveying rubber tube (11), an oxygen valve I (12), an oxygen pressure display instrument (13), an oxygen flow instrument (14), an oxygen valve II (15) and an oxygen source (16); the method is characterized in that: the thermocouple (2) is inserted into the oxygen lance through a thermocouple hole formed in the upper part of the oxygen lance (1) and contacts with the head of the oxygen lance; the signal transmission of the thermocouple is transmitted and displayed through a temperature transmission device (3) and a temperature display instrument (4); compressed air pipes are sleeved outside the oxygen lance (1) at intervals, a threaded steel wire layer and an asbestos rope layer are fixedly sleeved outside the front end of each compressed air pipe from inside to outside in sequence, and the compressed air pipes are connected with a compressed air source (10) sequentially through a compressed air valve I (6), a compressed air pressure display instrument (7), a compressed air flow display instrument (8) and a compressed air valve II (9); an oxygen inlet of the oxygen lance (1) is connected with an oxygen source (16) through an oxygen delivery rubber tube (11), an oxygen valve I (12), an oxygen pressure display instrument (13), an oxygen flow instrument (14) and an oxygen valve II (15) in sequence.

Technical Field

The invention belongs to the technical field of blast furnace and non-blast furnace ironmaking processes, and particularly relates to a taphole oxygen lance system used when iron slag discharged from a taphole of a blast furnace and a non-blast furnace is difficult to treat.

Background

The heat loss of the hearth of the gasification furnace of the Europe and metallurgy furnace is a common accident of non-blast furnace iron-smelting Europe and metallurgy furnace production, and the vicious accidents of furnace cooling and hearth freezing can be caused by poor treatment of the hearth due to the heat loss of the hearth under the common condition. The method generally adopted for treating the accidents of furnace cooling and furnace hearth freezing is to connect the iron notch of the furnace hearth with the tuyere in the shortest time so as to melt the iron slag shell between the furnace hearth and the tuyere, and the purpose is that the molten liquid iron slag in the tuyere area can smoothly flow into the iron notch area after air supply and finally flows out from the iron notch. The conventional method for treating the slag iron of the hearth from the iron notch is that an operator in front of the furnace holds an oxygen pipe to continuously burn the iron notch below an air port or embed the oxygen gun into a channel of the iron notch, air and oxygen are supplied, and the condensate in the furnace is rapidly burned and melted, so that the speed of treating the hearth accident process of the Ou-smelting furnace is accelerated. Although the speed of treating the condensate by burying the oxygen lance in the iron notch is high and the effect is good, the method is more and more widely applied. However, because the oxygen lance is buried in the taphole, the temperature and the gas pressure cannot be monitored, if the operation of an operator is not standard or the time and the oxygen amount are not properly controlled, the ceramic cup and the carbon brick in the taphole area of the furnace hearth can be damaged, and the cooling wall in the taphole area can be burned seriously.

Disclosure of Invention

The invention aims to provide an iron notch oxygen lance system for an Ou-smelting furnace, which has the advantages of simple structure, simplicity and convenience in operation, reliability in operation, capability of quickly cooling and quickly communicating an iron notch and a tuyere of a hearth of the Ou-smelting furnace, shortening of processing time, improvement of operating efficiency and guarantee of safe production.

The technical scheme adopted by the invention is as follows: an iron notch oxygen lance system for an Ougu furnace comprises an oxygen lance, a thermocouple, a temperature transmission device, a temperature display instrument, a compressed air conveying rubber tube, a compressed air valve I, a compressed air pressure display instrument, a compressed air flow display instrument, a compressed air valve II, a compressed air source, an oxygen conveying rubber tube, an oxygen valve I, an oxygen pressure display instrument, an oxygen flow instrument, an oxygen valve II and an oxygen source; the thermocouple is inserted into the oxygen lance through a thermocouple hole formed in the upper part of the oxygen lance and contacts the head of the oxygen lance; the signal transmission of the thermocouple is transmitted and displayed through a temperature transmission device and a temperature display instrument; compressed air pipes are sleeved outside the oxygen lance at intervals, a threaded steel wire layer and an asbestos rope layer are fixedly sleeved outside the front end of each compressed air pipe from inside to outside in sequence, and the compressed air pipes are connected with a compressed air source sequentially through a compressed air valve I, a compressed air pressure display instrument, a compressed air flow display instrument and a compressed air valve II; an oxygen inlet of the oxygen lance is connected with an oxygen source sequentially through an oxygen delivery rubber tube, an oxygen valve I, an oxygen pressure display instrument, an oxygen flow instrument and an oxygen valve II.

When the oxygen lance is used for treating slag iron and is not discharged from an iron notch, the oxygen lance is arranged on a tapping machine through a screw rod, the oxygen lance is jacked into a hole channel of the iron notch by the tapping machine, a asbestos rope blocks a hole between the oxygen lance and the hole channel of the iron notch, oxygen consumption is controlled from an oxygen system to burn and melt the slag iron in a furnace hearth, compressed air is introduced from a compressed air system to cool an oxygen lance body, the temperature of the oxygen lance is detected from a temperature display system, and the burning loss of the oxygen lance is prevented. The invention can treat the production problem that the smelting reduction non-blast furnace ironmaking gasification furnace hearth is lack of heat and the furnace cooling slag iron can not be discharged from the iron notch, can completely discharge the slag iron mixture solidified in the hearth after being burnt, quickly activate the hearth, quickly recover the working state of the hearth, quickly recover the normal production, add a thermocouple and a display instrument on a common oxygen lance, can effectively monitor the front end temperature of the iron notch, can judge the melting state of the slag iron and the working state of the oxygen lance through the temperature on the display instrument, comprehensively judge the combustion amount of coke above the iron notch and calculate the theoretical combustion temperature after the combustion amount of the coke through the oxygen amount of compressed air, thereby achieving the purpose of studying and judging the melting amount of the slag iron.

Drawings

The present invention will be described in further detail below with reference to the accompanying drawings.

FIG. 1 shows an oxygen lance system for an Ougu furnace.

Detailed Description

A iron notch oxygen lance system for an Ougu furnace is shown in figure 1 and comprises an oxygen lance 1, a thermocouple 2, a temperature transmission device 3, a temperature display instrument 4, a compressed air delivery rubber tube 5, a compressed air valve I6, a compressed air pressure display instrument 7, a compressed air flow display instrument 8, a compressed air valve II 9, a compressed air source 10, an oxygen delivery rubber tube 11, an oxygen valve I12, an oxygen pressure display instrument 13, an oxygen flow instrument 14, an oxygen valve II 15 and an oxygen source 16; the thermocouple 2 is inserted into the oxygen lance through a thermocouple hole formed in the upper part of the oxygen lance 1 and contacts the head of the oxygen lance; the signal transmission of the thermocouple is transmitted and displayed through the temperature transmission device 3 and the temperature display instrument 4; compressed air pipes are sleeved outside the oxygen lance 1 at intervals, a threaded steel wire layer and an asbestos rope layer are fixedly sleeved outside the front end of each compressed air pipe from inside to outside in sequence, and each compressed air pipe is connected with a compressed air source 10 sequentially through a compressed air valve I6, a compressed air pressure display instrument 7, a compressed air flow display instrument 8 and a compressed air valve II 9; an oxygen inlet of the oxygen lance 1 is connected with an oxygen source 16 sequentially through an oxygen delivery rubber tube 11, an oxygen valve I12, an oxygen pressure display instrument 13, an oxygen flow instrument 14 and an oxygen valve II 15.

The oxygen lance 1 is inserted into the iron notch channel 18 by utilizing the rapping function of the tapping machine 17, and the length of the oxygen lance is consistent with the length of a drill rod normally used in production of an Ou-smelting furnace. And opening a first oxygen valve 12 and a second oxygen valve 15 of the oxygen system, delivering oxygen to an oxygen channel of the oxygen lance through an oxygen source 16 and an oxygen delivery rubber tube 11, and entering the furnace, wherein the pressure and the flow are monitored through a pressure display instrument 13 and an oxygen flow instrument 14. After oxygen is introduced, a thermocouple 2, a temperature transmission device 3 and a temperature display instrument 4 in the temperature display system are used for displaying and monitoring the temperature of the oxygen lance and the melting condition of the iron slag. The oxygen lance temperature is controlled by utilizing compressed air output by a compressed air source 10 and a compressed air delivery rubber tube 5, controlling the compressed air flow and the oxygen lance temperature through a compressed air valve I6 and a compressed air valve II 9, and monitoring the compressed air pressure and the flow through a compressed air pressure display instrument 7 and a compressed air flow display instrument 8.

The working principle and the working process of the invention are as follows: the temperature at the thermocouple is judged by observing the display instrument, so that the working condition of the oxygen lance and the melting condition of slag iron condensate are judged, the combustion amount of coke 19 above the taphole is comprehensively judged by oxygen and compressed air flow, and the theoretical combustion temperature after the combustion coke amount is calculated by the oxygen amount is used for achieving the purpose of studying and judging the melting amount of the slag iron. The thermocouple is additionally arranged in the stainless steel oxygen lance, the temperature signal of the thermocouple is transmitted to the display instrument, when the temperature of the iron notch oxygen lance normally works, the flow rate of compressed air can be properly increased, a large amount of slag iron is melted, when the compressed air is not enough to cool, the oxygen lance can be withdrawn to organize the iron, the iron can be discharged, and the oxygen lance can be inserted into the oxygen lance again for recycling after the slag iron is discharged completely.