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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
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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Pakistan
We have 6 kittens that will be available as pets, they will be ready to leave home on 7 April 2016. There are 3 boys and 3 girls. Silver spotted and Brown spotted. Mum is a gorgeous Silver Marbled F6 and Dad is a stunning tarnish free Silver spotted boy. If you are interested in these babies, please contact me as there is always a great demand for these babies from this pairing. They always make fabulous big kittens and this is probably the last time that these two are paired together due to the age of Oliver. Viewings start at 8 weeks of age after their 1st vaccination when we will require a non-refundable deposit to secure your kitten. We can also early neuter your boys before they leave us, this will be chargeable, please ask us about this. Individual photos will be taken in a few weeks when kittens are weaning. Please note that some of the kittens are in the fuzzies so markings will not clear for a few weeks yet: Beige Collar - Cool Brown Boy Blue Collar - Silver Boy Green Collar - Silver Boy Purple Collar - Brown Girl Yellow Collar - Stunning Cool Brown Girl Pink Collar - Silver Girl
Rs 5.000,0
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Pakistan
due to a change in personal circumstances and a increase in work hours i am unfortunatly having to look for a new home for my four year old female beagle, jessie. Jessie has been spayed and is a member of the family it has been a very difficu....
Rs 200,0
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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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Multan (Punjab)
Hazrat Syed Sakhi Zain ul Abideen (RA) migrated from Baghdad to Saudi Arabia and spent 22 years in Madina Munawara.One night, holy Prophet hazrat Mohammad (may peace be upon him) appeared in a dream and instructed him to go to India, convince the people to the right path, preach or spread the teachings of Islam.Obeying the orders of the holy Prophet Hazrat Mohammad (may peace be upon him), the Sufi Saint left Madina Munawara and came to Shahkot. The Sufi saint is the father of a famous Sufi Hazrat Syed Ahmad Sultan, known as Sakhi Sarwar, the bountiful Chief, shrine at Sakhi Sarwar Pakistan. Hazrat syed sakhi Zain ul Abideen (RA) practised austerities and prayers in shahkot, The great renowned Sufi saints paternal genealogy is directly related ten generation up with Ameer ul Momeneen (commander of faithful) Hazrat Imam Ali Ibne Abu Talib R.A, thus he was a direct descendant of the holy Prophet Hazrat Mohammad (may peace be upon him). The name Zain ul Abideen was selected by his father Syed Umar due to the deep love and devotion with Imam Zain ul Abideen (A.S). Specification. Object Name: Seal stamp Description: Syed Zain ul Abideen Shah"Sultan Sarwar" Inscription Script : Arabic Inscription Technique: Engraved Date Period: A D 13th Century 1248 Time period: A D 13th Century Geography: Indian Subcontinent (Central Asia) Culture/period: Islamic Condition: Excellent Relics of the Islamic saints strengthens spiritual beliefs, inspire people and give them comfort in tough times. The holy seal is a precious asset handed down from generation to generation, extremely rare and a genuine masterpiece regarding the sacred relics of the early Islāmic saints.
Rs 100,0
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Pakistan
KC BRITISHPRIDE BRED English Bulldog Hes The son of Britishpride Royal Ascot. available for STUD. HE IS A PROVEN STUD DOG producing quality puppies.
Free
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Pakistan (All cities)
We provide best female fitness trainers and best female yoga trainers for women, who wants to stay fit and health from home without going to gym, best ladies gym nearby for housewifes and working women.
Free
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Bhimber (Azad Kashmir)
Discover affordable farmland in the tropical paradise of Costa Rica. These fertile plots offer rich soil, ideal for agriculture, and scenic views perfect for a serene retreat. Whether you envision a productive farm or a peaceful homestead, this opportunity provides a gateway to sustainable living in a stunning environment. Website: https://hacienda-el-toro.com Location: 2.7km NE Escuela de Huacas City: Hojancha Country: Costa Rica Providence/ State: Guanacaste 2.7 km NE Escuela de Huacas, Hojancha, Costa Rica Phone Number: + 5650001001
Rs 2.850.000,0
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Ali Masjid (Federally Administered Tribal Areas)
To Purchase , For Enquiry : (wh.ATSa.saP.p.p. or call : +995 597 13 0228‬) Payment - Payment - BTC / Ethereum / Bitcoin Cash / USDT ETH Warranty& Return Policy - 3 Year . Shipping - FREE - SHOP TOP DEALS - Discount up 30% to 40% OFF Available in Stock : crypto currency S19J S19 Pro mining machine ,100% Genuine Asic Miners in stock , Goldshell miners, Ebang miners ,Avalon miners , Whatsminer Asic miners , Gpu Video Cards . crypto currency mining machine Free shipping . ASUS TUF Gaming GeForce RTX 4090 OC 24GB GDDR6X NVIDIA Graphics Card Nvidia Gigabyte GeForce RTX 4090 GAMING OC 24GB GIGABYTE GeForce RTX 4090 GAMING OC 24G Graphics Card GIGABYTE GAMING OC GeForce RTX 4090 24GB GDDR6X NVIDIA Graphics Card ZOTAC GAMING GeForce RTX 4090 Trinity OC 24GB GDDR6X Graphics Card ASUS ROG Strix GeForce RTX 4090 OC Edition Gaming Graphics Card Our production and fulfillment departments perform a final frequency check prior to shipping. If you selected a frequency that is not compatible with the shipping address, our support team will contact you via email to confirm the frequency on the order. A form will be provided for you to complete if you’d like to proceed with this unsupported frequency. If the form is not competed within 7 days of receiving this email, our fulfillment team will change the frequency, so that it complies with the region where the miner is being shipped. email:: atashstarimpex1@gmail.com whatsapp or call : +995 597 13 0228
Rs 0,0
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Abbottabad (Khyber Pakhtunkhwa)
Looking for the perfect way to Send Birthday Gifts to India? We’ve got you covered with our unique selection of Birthday Gifts! From personalized keepsakes to luxury hampers, there’s something special for everyone. Worried about last-minute orders? Birthday Gift Same Day Delivery in India ensures your gift reaches on time. Explore our curated collection and make birthdays memorable. Shop now to find the ideal gift that says “happy birthday” in the most thoughtful way.
Rs 500,0
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Pakistan (All cities)
Overview The taper of the narrow face of the mold has an important influence on the quality of the casting billet. Excessive taper will cause the mold to squeeze the billet shell, and a small taper will increase the air gap. With the continuous increase of the requirements of the casting billets’ quality and the continuous introduction of high-precision molds, the current taper measuring instrument in the domestic market generally have low measurement accuracy and complex measurement methods, which restrict production development. The new-generation taper measuring instrument developed by Wuhan CenterRise M&C Engineering Co., Ltd. adopts imported high-precision inclination sensor, combined with ultra-low power consumption processor, which can quickly and accurately measure the actual taper value of the narrow copper plate of the mold. The instrument is fully functional, easy to use and suitable for slab molds of various lengths. Most of the current slab molds are single-taper, a narrow flat copper plate. The taper value required for production can be achieved by adjusting the angle between the narrow copper plate and the direction of gravity. The taper measuring instrument directly measures the angle between the narrow copper plate and the direction of gravity. According to habits and production needs, the angle is converted into the value of one-sided shrinkage of the upper and lower ports. The main features 1. Easy to calibrate, stable performance, easy to operate 2. Self-supporting, self-aligning, self-balancing 3. High measurement accuracy 4. LCD data reading 5. Fast response, real-time display reading 6. Adjustment of dynamic intelligent system 7. Lithium battery power supply, suitable for on-site use of mobile operations 8. The continuous measurement time is more than 36 hours 9. The sensor adopts multiple protections to meet the needs of on-site harsh environment measurement 10. The weight of the whole system is less than 3.8 kg, and it is equipped with a set of zero-point calibration table, which is convenient for on-site installation and measurement 11. Applicable to various arc, parabolic and straight molds The performance and index 1. Measuring range: -3°~ +3° (measurement length can be customized according to users’ needs) 2. Measurement accuracy: 0.01mm 3. Temperature range: -25℃~+85℃ 4. Linearity deviation: -0.03mm ~ + 0.03 mm 5. The longest usage time after fully charged: 36 hours 6. The longest storage time after fully charged: 2 months The main components 1. Measuring instrument: central measurement and control unit, measuring sensor 2. Measuring stand 3. Standard table: standard surface, support frame, spirit level
Rs 0,0
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Pakistan (All cities)
Manufacturer's Warranty. Tecno Industries (Reg) اَلحَمْدُ لِله Manufacturers of: SERVO MOTOR controlled, Automatic Voltage Stabilizers & Regulators. (pure copper) Since 1986 Tecno Lazer Pakistan. 0300-9433728 Ring Road, Band Road, Lahore Pakistan. A Servo Stabilizer That Decreases 30 Volts (back-from 250 to 220 & Increases 70 Volts from 150 to 220) (±) 1% {CAN STEP-UP from even low (on-demand)} اَلحَمْدُ لِله Runs your Equipment Even in Low Main Voltage. INFORMATION: 1: ( An Old Transformer / Relay carrying Stabilizer steps down or up after losing or gaining 20-25 Volts While A Servo Stabilizer steps down or up after losing or gaining 1 Volt. (±) 1%) 2: (on-demand) Buck-Boost Transformer Technology add-in 2kVA and above Models. Basically they work on DC Servo Motor Control system. Their efficiency is much better and its output voltage of either 110 or 220 AC or any required voltage, more-over TECNO 3Phase models up-to 500kVA ratings are manufactured against a confirmed order. 1 year warranty with parts. 100% genuine copper winding (GUARANTEED) Specs for (intelligent Voltage Stabilizer): SERVO MOTOR controlled, Automatic Voltage Stabilizers & Regulators. Input Voltage : 150 To 250 AC Output Voltage : 110v & 220v AC (±) 1% Frequency : 45 or 60 Hz Wave Form : Non-distorted Sine-wave Response Time : 25ms / V Efficiency : 95 % Power Factor : 0.95 Relative Humidity : 30% to 80% (without condensation) Temperature Rise : Less Then 50c Control System : DC. Servo Motor Insulation Resistance : More then 3M?? at 500V DC Tested : 1500 V We Manufacture Servo Motor Controlled Automatic Voltage Stabilizer, using Japanese technology, for UPS, Solar, AC Air-Conditioner, Split-Type, Window Type, (LCD/LED TV) Washing Machine, Treadmill, Photocopier Machine. Television, Music System, Refrigerators, Ultra sound Machines, Embroidery Machines, All Sensitive Equipment, Signalling Devices, CNC Machines, Air Conditioning Plants, Telecommunication Networks, Motor Loads, Data Processing Equipment, Bio Medical Equipment, Drives, PLC’s, Induction Heating, Hotels, Defence Application, Industrial Units, Lighting Loads, Residential/ Offices, Farm Houses, R & D Institutions, Mainline Stabilizers, Sophisticated Laboratory Equipment etc. Runs your Appliances Even in Low Main Voltage. وولٹیج سٹیبلائزر Standard Power Ratings Available in Single-Phase & 3-Phase: 500VA, 1kVA, 2kVA, 3kVA, 5kVA, 10kVA, 30kVA. Up-to 500kVA Punjab NWFP, KPK, & All Pakistan Cargo, Feel Free to Call: Rana Naeem Hammad. M.D. Tecno Industries (Pvt) Ltd Lahore. +923009433728
Rs 121,0
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Badin (Sindh)
Al Nazafat is a marketing and distribution company for various health & hygiene products, for household, commercial and industrial consumption, in addition we are general order supplier for all kind of chemicals which may be imported or locally produced. Visit https://alnazafat.com/
Free
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Pakistan (All cities)
We have the Outboard Boat Engine OXE. Yamaha We are specialized in the sales of full metal scrap/ recycling material such as ac/fridge compressor , Ceramic Cpu Gold Processor Scraps , H.M.S 1&2, Copper wire scrap,Drained Battery Lead scrap in the UK (LONDON).We have all our product fully ready for sales in good quantity and quality also to be shipped out for our buyers.For Booking : https://wa.link/og0sgp Whatsapp: +15806151130
Rs 150.000,0
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2 photos

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