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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
I have a British blue shorthair male and female available for stud service. PKD NEGATIVE, BLOOD TYPE A or AB (CARRIER OF B). Tom had 8 litters so far, all healthy and chunky kittens. He is an indoor cat, fully vaccinated and in great health.
Rs 5.000,0
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Karachi (Sindh)
CCTV Market specializes in offering premium CCTV security systems for homes as well as businesses. With over 10+ years of experience and a solid reputation for happy customers, we provide affordable solutions that are customized to meet your security needs. To guarantee you get the highest level of service possible, our knowledgeable staff takes care of everything from CCTV system design and installation to maintenance and repairs. We are your one stop shop for easily CCTV security since we place a high priority on quality in both our goods and services. For dependable and effective CCTV installation and repair, rely on CCTV Market right now.
Rs 150,0
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Pakistan
2 pairs yellows for sale all in top condition ready for breeding they are 2015 bred birds 2 pairs yellows for sale all in top condition ready for breeding they are 2015 bred birds .....................2 pairs yellows for sale all in top condition ready for breeding they are 2015 bred birds
Rs 4.000,0
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Pakistan (All cities)
As one of the largest Chinese manufacturers of industrial valves, China Vervo Valve Co., Ltd. offers a wide array of products, including floating ball valves, trunnion ball valves, cast steel gate valves, forged steel gate valves, pressure seal gate valves, cast steel globe valves, forged steel globe valves, cryogenic globe valves, forged steel check valves, swing check valves, dual plate check valves, API 609 butterfly valves, steel plug valves, Y strainers, and more. Our business reaches North America, South America, Europe, Asia, the Middle East, Africa, and Oceania. We manufacture, import, and sell a wide range of industrial valves, including ball, gate, globe, butterfly, check, plug valves, and specialty valve solutions. We look forward to establishing a strong cooperation with you! Visit our website: https://www.vervovalve.com/
Rs 200,0
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Pakistan (All cities)
China Metal Parts Forging OEM Manufacturer Co., Ltd. (https://www.creatorcomponents.com/) was founded in 2000 by a team of experienced professionals in the forging industry. As a Chinese manufacturer, we specialize in providing high-quality carbon steel and alloy steel metal parts and components for a wide variety of industries. We focus on innovation and engineering excellence to ensure that we meet the highest standards of quality and performance. By utilizing advanced technology and state-of-the-art equipment, we produce products that are durable and reliable, meeting the requirements of both domestic and international customers. Quality is a top priority at every stage of our production process. From inspecting raw materials to conducting 100% final product testing, we ensure all products comply with international standards through our thorough quality control system. As a Chinese manufacturer, we offer customized metal parts to cater to the specific needs of industries such as automotive, construction, and energy. We collaborate closely with clients to deliver tailored solutions that align with their business objectives. At China Metal Parts Forging OEM Manufacturer Co., Ltd., we are dedicated to providing innovative, sustainable solutions and excellent customer service, earning the trust of businesses worldwide as a reliable partner.
Free
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4 photos

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 (All cities)
ISO Certification in Kuwait is essential for businesses aiming to improve their credibility, efficiency, and market competitiveness. Achieving ISO Certification in Kuwait offers a standardized management system that supports organizations streamline processes, improve product quality, and ensure customer satisfaction. Additionally, ISO Certification in Kuwait demonstrates a commitment to international best practices, which is crucial in a globalized market. For businesses looking to expand internationally, ISO Certification in Kuwait is a significant advantage, as many clients and countries prefer or require ISO-certified partners. In Kuwait’s growing economy, ISO Certification in Kuwait serves as a key differentiator, fostering trust and reliability among clients and stakeholders. Quality Sistema Certifications & Inspections Pvt. Ltd. is one of the leading Global Organization, providing ISO Certifications, Inspection, Assurance & Auditing Services for industries with competence and transparency to build trust across the global industries. We are a team of highly specialized experts and industry professionals who working towards a sustainable business growth. #ISO 9001 Certification KuwaiT,#ISO Certification in Kuwait #iso 9001,ISO 9001 Certification Kuwait
Free
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Islamabad (Islamabad Capital Territory)
Marshall Packers and movers in Lahore Pakistan International Packers and movers in Lahore Pakistan Our services House shiftng services Goods transportation Freight forwarding International cargo services International Afghan Transit services International furniture shipping services House shifitng services in Rawalpindi"House shifitng services in Pakistan International cargo services in Islamabad https://marshallpackers.com/services/cargo/
Free
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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 (All cities)
Effective Bird Deterrence: Strategically designed bird spikes to effectively deter pigeons, sparrows, and other nuisance birds.....
Free
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Pakistan (All cities)
Specification Used Electric Motor Scrap sealed units purity: 99.97% with connection box consist of aluminum case, with full copper content inside voltage220/440 voltage 50 or 60 hz. Size : 100 -500 cm3 power 2 Hp to 40 Hp Three phase Compressor weight: 6Kg, 8Kg, 10Kg, 12Kg 14kg 20kg -22 kg 40kg material : oil drained, comes copper Inside bulk quantity available for more details inbox me or contact us via email at baicuscrapmetalltd@gmail.com or add us on whatsapp +447918 245841
Rs 120,0
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Pakistan
Beautiful lemon and white female beagle pup for sale, 5 months old, fully vaccinated, microchipped, flee'd and wormed. Not kc registered and as she's our pet, mother or father can't be seen. Very playful, energetic and needs a caring family ....
Rs 200,0
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Lahore (Punjab)
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Rs 45.000,0
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Pakistan
Unfortunately have to sell my Chinese water dragons and I need to down size on my reptile room these 2 are extremely friendly and love to come out and roam full working vivarium vivarium is large as you can see in images so need a van to come remove and 2 or 3 people to carry down stairs please contact me on [telephone removed]
Rs 50.000,0
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