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Pakistan (All cities)
Overview The automatic control for the molten steel level of the mold is one of the key technologies of continuous casting production. It is very important to reduce the labor intensity of workers, improve production efficiency, improve the quality and output of casting billet, reduce overflow and breakout of steel and improve the management level of steelmaking and continuous casting. The molten steel is poured into the mold. In order to prevent overflow, the molten steel level must be kept stable. Otherwise, during the casting process, if the level will fluctuate too much, and slag will be involved, forming surface slag inclusion on the surface of the casting billet, affecting the quality of the billet. The test points out that the relationship between the level fluctuation and the depth of casting billet surface slag inclusion is as follows: The experience has shown that surface slag inclusions can be eliminated when the level fluctuation is within ±10mm. At the same time, if the level fluctuation is more than 10mm, the rate of longitudinal cracks on the casting billet surface is 30%. It means that the level fluctuation directly affects the surface quality of the casting billet. The principle of the system The eddy current type molten steel level gauge is the key to the system. The system operates reliably and has excellent performance: high temperature resistance, strong anti-interference ability, fast dynamic response (lag time 0.10s), high detection accuracy (±05mm), and large measurement range (0-150mm). The selected electromagnetic field frequency ensures that the level detection probe only detects the level change of the mold and does not detect the mold flux or steel slag layer. The system has the advantages of simple operation and no radiation protection problems. The system is insensitive to argon blowing, and its sensors can be mounted on the tundish car or on the platform. The sensor is cooled by compressed air during use. The principle is shown in the figure A high-frequency exciting winding is installed above the molten steel surface of the mold. The high-frequency magnetic field generated by the high-frequency exciting winding induces eddy currents on the molten steel surface to form a magnetic field. The magnetic field generated by the induced eddy current is in the opposite direction to the magnetic field generated by the high-frequency exciting winding, which changes the impedance of the high-frequency exciting winding. Under the condition that the winding material and structure, steel grade, temperature remain unchanged, the coil impedance change only has a single-value function relationship with the height of the molten steel level. As long as the impedance change of the high-frequency winding is detected, the change of the molten steel level in the mold can be converted. The components of the system Continuous casting mold level automatic control system is composed of eddy current tyoe molten steel level gauge, controller and digital actuator for adjusting the opening of tundish stopper. The detection end of the mold level automatic control system is ① eddy current displacement sensor, which uses the eddy current mutual inductance effect between the energized coil and the metal conductor to detect the distance. The effective signal of the eddy current sensor is amplified and linearized by the circuit of ② mold level gauge, which converts the 0-150mm change in the molten steel level of the mold into a standard signal of 4-20mA.DC, and then transmits it to the ③ control computer to complete data processing and system control functions. We can also control the actuator manually and automatically through the ④on-site operation display control panel, and the opening of the stopper is controlled by the ⑤ actuator to realize the automatic control of the molten steel level. 1 Eddy current sensor; 2 mold level gauge; 3 control computer; 4 On-site operation display control panel; 5 digital actuator; The control principle of the system The system can be set to four control modes: automatic, semi-automatic, manual and motor clutch. The automatic mode is the closed-loop control system of the molten steel level, and control the opening of the stopper by the digital actuator; the semi-automatic mode uses opening degree setter and digital actuator to set the opening of the stopper manually; the manual mode is to open and close the button directly to control the opening of the stopper; the motor clutch mode is quickly changed from any of the above control methods to manual stopper operation. The functions of the system also include: display and record of molten steel level, nozzle opening and casting speed; setting of molten steel level and nozzle opening; alarm of molten steel level at limit value etc. In addition to taking the detection of molten steel level as the main feedback signal of the control system, the control system also considers various interference factors that have an impact on the level control. These interference factors include: 1. The influence of the change of the flow characteristics on the control system after the melt loss of the stopper 2. The influence of the weight change of molten steel in the tundish on the control system 3. The influence of the change of the casting speed of the continuous casting machine on the control system 4. The influence of the mold width change (the mold width is adjustable) on the control system 5. The influence of the vibration frequency and amplitude of the mold on the molten steel level gauge The function and software implementation In order to overcome these disturbances, the mold level control strategy adopts PID control. And on the basis of PID control, self-adaptive correction and feedforward control are introduced to form an advanced control system. The level control is the main loop, and there is a proportional gain of the main loop controller. According to the self-adaptive correction of the mold width change and feedforward compensation of casting speed, so as to further reduce and eliminate liquid level fluctuations caused by mold width adjustment and casting speed changes. In order to reduce the frequent action of the stopper, the system adopts the intergarting time change of the controller, and automatically selects a longer intergarting time when the molten steel level fluctuates lightly. And the system will choose a shorter intergrating time when molten steel level fluctuates greatly. Thereby, the fluctuation of the controlled object caused by the frequent action of the stopper rod is suppressed. In the signal processing of molten steel level gauge, an appropriate filtering link is added and the vibration frequency synchronous filter is used for filtering processing, which can overcome the interference of mold vibration frequency and amplitude variation.
Rs 200.000,0
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Pakistan
Our amazing litter was born on 18th of December mum is stunning tri colour and dad is a lemon and white tri both pedigrees dad has five generations blood line with his papers to prove. We have a litter of 9 chunky playful pups all wormed and....
Rs 200,0
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Pakistan (All cities)
Overview The infrared converter slag detection system uses a far-infrared thermal imager to monitor the situation of converter tapping in real time, and is connected to the main control computer in the electrical room through the conversion and transmission of video signals. The radiation intensity in the infrared wavelength range of 7-14um is different to distinguish molten steel and slag. In the later stage of the converter tapping, the molten steel gradually decreases, and the steelmaking slag is involved in the molten steel and flows out of the tapping hole. After the thermal imager recognizes the steelmaking slag in the imaging temperature measurement, it will give an alarm according to the slag content ratio threshold set by the software. The thermal imager will start the slide plate to close the tapping hole, so as to realize the control of the slag in the converter tapping, and ensure the maximum yield of molten steel and the minimum control of the steelmaking slag content. The effect of slag detection in converter tapping is of great significance to the control effect of the slag amount. The converter slag detection and control system developed by our company conducts non-contact monitoring of the tapping steel flow through the far-infrared detector thermal imager. It can detect the slag condition in real time and output an alarm signal and control system, which can replace manual visual inspection and provide accurate, efficient and stable slag detection effect. When the system finds the slag, the intelligent control unit quickly makes a judgment of lifting the furnace and blocking the slag and outputs an alarm signal. As shown in Figure 1, the system includes thermal imager, front purge protection box, front electrical box, power distribution cabinet, main control monitor, monitor of rocking furnace chamber, sound and light alarm, infrared converter slag monitoring software system, etc. The features of thermal imager 1. The temperature measurement range is 200°C ~ 2000°C, high temperature measurement accuracy, and multiple temperature measurement intervals can be set. 2. High-resolution thermal imaging system, the imaging picture is clear, and the imaging color can be freely marked according to the set temperature. 3. With hot zone alarm function, the alarm zone and temperature range can be set arbitrarily. 4. With hot zone tracking function 5. Equipped with special 7~14um infrared filter lens The technical parameters 1. Temperature measurement range: 200°C ~ 2000°C 2. Temperature measurement accuracy: 2% 3. Detection accuracy and alarm accuracy: ≥98% 4. Resolution: ≥ 0.5℃ 5. Pixels: 640x240PT 6. Band: 7~14um 7. Field of view: 7.5°×5.5° 8. Frame rate: ≥ 25 frames/sec 9. Equipment service life: ≥5 years 10. The normal operation rate of the automatic control system: ≥99%
Rs 0,0
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3 photos
Pakistan (All cities)
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Free
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2 photos
Pakistan
One is 7 months old (not sexed); freely flying, like to be out of cage all day, freely flying around. Other one is 5 months old (breeder told male, but not sexed) has already started training; steps on a perch now on demand, wing feathers growing back, likes to be outside cage on his stand.
Rs 4.000,0
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Pakistan (All cities)
Overview Our company focuses on the production and application of the cables in continuous casting steel production. We have rich on-site usage experience, which provides us with technical guarantees for manufacturing high-quality communication cables. For cables of different applications, we have different protection requirements, such as high temperature resistance, anti-pull, acid and salt spray resistance, slightly positive pressure heavy-duty connector, anti-oil pollution, anti-interference, etc. Common industriaI cable for continuous casting 1. Breakout prediction compensation cable 2. Mold level control cable 3. Mold oscillation cable 4. VUHZ sensor cable 5. Mold width adjustment cable 6. Dynamic lightly depress the cable 7. Fixed cable for ladle slag 8. Movable cable for ladle slag The quality control All our products use proven materials to ensure stable and reliable product quality from the source. The core equipment all adopt imported raw materials. From raw material control to wire harness integrated processing, we ensure the stability and consistency of product quality. The scientific quality management system brings the product quality to a higher level. The program customization Our company has been focusing on the production and processing of wire harness products for many years. We have a professional technical team, which can realize synchronous development and technical docking with customers timely, optimize product design, and provide customers with complete solutions for wire harness products. Widely used: All kinds of wire harnesses produced by our company are widely used in major steel mills across the country, such as SHOUGANG, TISCO, HBIS GROUP, TIANJIN IRON PLANT, BAOGRANG GROUP, etc. The first-class product quality, and has won unanimous praise from domestic and abroad.
Rs 0,0
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5 photos
Pakistan
imported Friesian 4 yr old mare for sale. This filly has been backed a few months ago in Holland just for 2 weeks and then came to the uk. advertised due to her needing more one to one. the most amazing mover and really one to be graded and could do well. sad sale as just overstocked. no bargain hunters need to inquire pls as I won't accept offers price is firm. No novices pls. this mare is not for the pussy due to being a little worried with mounting but will settle quick. extremely low inbreeding only 0.39% her sire is the top stallion Sjouke 453 dam is Katrina who is out of Sierk 326
Rs 50.000,0
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Pakistan (All cities)
Overview: In the steelmaking production process, the ladle is the key equipment for holding molten steel, secondary refining, and continuous pouring. In a modern steelmaking plant, refractory materials are required for converters, refining, and ladles. In the steelmaking process, ladle is the main equipment for using and consuming refractory materials. Improving the service life of ladles and reducing refractory consumption is the key technology for steelmaking plants to save costs and reduce energy consumption for green production. In order to ensure the orderly operation of the ladle, save the consumption of refractory materials, prolong the service life of the ladle, and ensure the safe operation of the ladle, Wuhan CenterRise M&C Engineering CO. developed and launched the LDT-N200 integrated management system for the ladle. Introduction: LDT-N200 ladle integrated management system integrates LDT-L200 ladle lining thickness gauge, TBP-S300 ladle, tundish baking temperature and leakage monitoring system, RFD -C100 metallurgical electronic positioning system, and also integrates SQL Server database and NeuralWare (American computer software company) neural network software NeuralWorks to realize intelligent and optimized management of ladles. LDT-L200 ladle lining thickness gauge uses a laser area array scanning sensor to accurately measure the real-time thickness of the ladle lining, calculate the lining loss, and predict the service life of the ladle. TBP-S300 ladle, tundish baking temperature and leakage monitoring system uses infrared thermal imaging camera and embedded armor wire system to comprehensively monitor and prevent ladle leakage. RFD-C100 metallurgical electronic positioning system installs RFID electronic tags on all ladles to realize full-time and full-space ladle positioning and tracking. LDT-S200 ladle optimization control and analysis software, based on SQL Server database, B/S network structure, realizes online management of ladles, and adopts BP neural network system to realize intelligent optimization control of ladles. LDT-N200 ladle integrated management system can realize ladle age management based on ladle lining data and neural network algorithm, safety process control of ladle turnover and use, full-time tracking management of steelmaking production and full-space tracking management of ladle use and provide optimal control and management of steelmaking production and ladle maintenance. Comprehensive ladle measurement and monitoring, ladle positioning and management, and data management and optimization enable the LDT-N200 ladle integrated management system to fully realize ladle entire process management, optimize the service life of ladles, and comprehensively reduce the cost of refractory materials. The features: Using a lining thickness gauge to measure the thickness of the ladle lining Using infrared thermal imaging camera/embedded armor wire to realize ladle leakage detection Using RFID/number plate recognition to realize the location management of ladles Ladle age management system based on overall tracking Overall (full-time full-space) ladle management system based on database Provide overall production scheduling data Using neural network to predict ladle service life based on big data Ladle Optimal Scheduling System based on database and ladle service life Increase the service life of ladle by 12%-20% Reduce the use of refractory materials more than 15% Realize orderly management of ladle baking Realize full space and full time domain control Reduce the costs of ladle management and maintenance Improve the efficiency of ladle turnover operation
Rs 0,0
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Pakistan (All cities)
Fridge/AC Compressor Scraps at a very competitive market price. Specifications : Compressor Weight : 2kg, 4kg, 6kg, 8kg, 10kg, and 12kg 14kg More Details : 220-240 v 50 or 60 hz.Cooling capacity : 90-190 w Size : 5.99 -12.53 cm3 Purity : 99.98% copper inside with connection box for more details contact us via email at baicuscrapmetalltd@gmail.com or whatsapp +447918 245841
Rs 120,0
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Pakistan (All cities)
TJWholesale is the importer, wholesaler and manufacturer of high quality gold plated jewellery, artificial jewellery, hair accessories, ladies handbags and men's accessories.
Rs 0,0
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Pakistan
4 year old male beagle called 'Bizol' who is very sweet a little shy but once settled is very loving and friendly. He is great with other cats and dogs, he would be fine to be rehomed with older children purely as he's a little shy, He is cur....
Rs 200,0
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Karachi (Sindh)
Mishkat service major market segments in the provinces of Sind and Punjab and our offerings range meets the needs of small and medium size industries, retail logistics. Visit https://www.mishkat.com.pk/
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Pakistan (All cities)
ALUMINIUM USED BEVERAGE CANS SCRAP LOOSE BALED OF UK ORIGIN. Available quantity 500mt Minimum Order acceptable 25MT Will be loaded in a 40ft high cube container Weight per container will be approx 25 mt. Origin: United Kingdom Details Item Aluminium scrap UBC Attechment : 3% Purity: 97.9% Minimum Density : 14 Pounds Per Cubic ft (225 kg/m3) Smooth Surface Tight Tolerances aluminum scrap Easy control and operation Fast melting Discontinuous melting with scrap High efficiency Stable working structure Packaging & Delivery Packaging Detail: it comes in bales, or according to the customer demand. Delivery Detail : Within 21-25 working days after order confirmed A maximum of 3% of impurities to be considered.this is just an outer limited Specification: Aluminium UBC Beverage Cans Chemical Composition: Si: 0.2 – 0.6%, Fe: 0.35%, Cu: 0.1%, Mn: 0.1%, Mg: 0.45 – 0.9%, Cr: 0.1%, Zn: 0.1% Standard Conforming to: (C11000 (ETP) Content 99.90%) Origin: United Kingdom/ Europe Packing: In Bundles Quantity: 25MTS and up to 300 MT per month Shipment: 40FT Container for more details contact us via email at baicuscrapmetalltd@gmail.com or whatsapp +447918 245841
Rs 300,0
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Askoley (Northern Areas)
Buy Verified Cash App Accounts https://buy5stareviewer.com/product/buy-verified-cash-app-accounts/ As it acquires clients, verified accounts become essential for businesses and individuals to fully access its features. A verified Cash App account allows you to send, receive, and withdraw substantial amounts of money, making it ideal for entrepreneurs, freelancers, and investors. The verification process ensures that the account is legitimate, reducing the risk of fraud and providing peace of mind for users. Verified Cash App accounts offer several advantages. Firstly, they enable higher transaction limits, allowing users to manage larger sums of money. This is particularly beneficial for businesses that need to process significant payments. Secondly, verified accounts provide enhanced security features, such as two-factor authentication, which helps protect against unauthorized access. Lastly, having a verified account can improve your credibility and trustworthiness when dealing with clients or customers. When purchasing a verified Cash App account, it is crucial to choose a reputable source. Look for sellers who offer guarantees of authenticity and provide excellent customer service. Conduct thorough research and read reviews to ensure you are making a safe and reliable purchase. Contact Info:: Telegram:@BBuy5stareviewer WhatsApp :+1(470) 745-6499 Skype :Buy5stareviewer live:.cid.e4c6455dd0c7f99e Email:buy5stareviewer@gmail.com
Rs 250,0
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Pakistan
Ready for their new home now pure breed beagles puppies. Both male and females available. They are all tri colour and are use to children. Mum is here to be seen with the puppies. For any further info please feel free to contact me. [Bizarte Beagles] Tri-colour Beagle Puppies male and female available.All Registered,pedigree and come with dew claws removed,free for MLS,NCCD by parentage,fully wormed,fully vaccinated with Contra.... ....
Rs 200,0
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