A glass tank furnace and a glass melting method. The tank furnace comprises a melting portion. The melting portion comprises a melting tank. The melting tank is provided with at least one burner mounted on a crown. Each burner is provided with a gas fuel conduit for supplying gas fuel and an oxygen conduit for providing oxygen. A gas fuel flowmeter and a gas fuel control valve are provided on the gas fuel conduit. An oxygen flowmeter and an oxygen control valve are provided on the oxygen conduit. The gas fuel flowmeter, the gas fuel control valve, the oxygen flowmeter and the oxygen control valve are all connected with a control unit.

Multiple magnetic field sensors are arranged around a current-containing volume at multiple longitudinal and circumferential positions. Each sensor measures multiple magnetic field components and is characterized by one or more calibration parameters. A longitudinal primary current flows through two end-to-end electrical conductors that are separated by an arc gap, and flows as at least one longitudinal primary electric arc that spans the arc gap and that moves transversely within the arc gap. Estimated transverse position of the primary electric arc is calculated, based on the longitudinal position of the arc gap, and two or more of the measured magnetic field components along with one or more corresponding sensor positions or calibration parameters. In addition, estimated occurrence, position, and magnitude of a transverse secondary current (i.e., a side arc) can be calculated based on those quantities.

Multiple magnetic field sensors are arranged around a current-containing volume at multiple longitudinal and circumferential positions. Each sensor measures multiple magnetic field components and is characterized by one or more calibration parameters. A longitudinal primary current flows through two end-to-end electrical conductors that are separated by an arc gap, and flows as at least one longitudinal primary electric arc that spans the arc gap and that moves transversely within the arc gap. Estimated transverse position of the primary electric arc is calculated, based on the longitudinal position of the arc gap, and two or more of the measured magnetic field components along with one or more corresponding sensor positions or calibration parameters. In addition, estimated occurrence, position, and magnitude of a transverse secondary current (i.e., a side arc) can be calculated based on those quantities.

The present invention belongs to the technical field of metallurgy, and discloses a horizontal continuous feeding preheating device and an enhanced preheating method therefor. The scheme comprises that two dust removal ports are arranged at the front and rear parts of a horizontal continuous feeding preheating duct, and the horizontal continuous feeding preheating duct is divided into an enhanced preheating area and a flue gas preheating area by the two dust removal ports arranged at the front and rear parts of the horizontal continuous feeding preheating duct; burners are installed in the enhanced preheating area, and the two dust removal ports are connected with a flue gas adjusting distributor respectively by a flue gas pipeline; the negative pressure of a second dust removal port is balanced by the efflux fluid dynamic pressure of a plurality rows of burners in the enhanced preheating area; the micro-negative pressure requirement of a first dust removal port is controlled by a pressure sensor, so as to reduce the amount of cold air mixed into the first dust removal port, the steel scrap preheating efficiency of the burners and electric arc furnace flue gas is increased by controlling the flow rate and temperature of mixed flue gas, and the production is made more environment-friendly.

A method for determining a length parameter of an electrode during operation of an electric arc furnace. An internal duct extends through the length of the electrode and is open at its lower end. A waveguide having a solid core is received in the internal duct and comprises a material having a low dielectric constant and high temperature resistance. The solid core of the waveguide includes at least one target. An electromagnetic radiation signal is emitted from a source and transmitted through the waveguide and the signal is diffracted and/or reflected from at least one target to produce at least one return signal which is transmitted back through the waveguide. A time or frequency difference between the emitted signal and the return signal is measured and the length parameter is calculated based on this difference.

A method for determining a length parameter of an electrode during operation of an electric arc furnace. An internal duct extends through the length of the electrode and is open at its lower end. A waveguide having a solid core is received in the internal duct and comprises a material having a low dielectric constant and high temperature resistance. The solid core of the waveguide includes at least one target. An electromagnetic radiation signal is emitted from a source and transmitted through the waveguide and the signal is diffracted and/or reflected from at least one target to produce at least one return signal which is transmitted back through the waveguide. A time or frequency difference between the emitted signal and the return signal is measured and the length parameter is calculated based on this difference.

A dual-purpose sintering furnace including a furnace body having a furnace chamber, a first furnace mouth and a second furnace mouth which are communicated with the furnace chamber, a furnace door hinged to the furnace body and configured for closing the first furnace mouth, a blocking member lap jointed inside the furnace chamber and configured for blocking the second furnace mouth, a sample stage, an ejection rod fixedly arranged on a sample placement face of the sample stage, a lifting device configured for driving the sample stage to raise or lower, so that the ejection rod pushes the blocking member until the second furnace mouth is opened, and so that the sample stage enters the furnace chamber through the second furnace mouth. The dual-purpose sintering furnace can complete a large amount of sintering as conventional sintering and also implement rapid sintering.

A dual-purpose sintering furnace including a furnace body having a furnace chamber, a first furnace mouth and a second furnace mouth which are communicated with the furnace chamber, a furnace door hinged to the furnace body and configured for closing the first furnace mouth, a blocking member lap jointed inside the furnace chamber and configured for blocking the second furnace mouth, a sample stage, an ejection rod fixedly arranged on a sample placement face of the sample stage, a lifting device configured for driving the sample stage to raise or lower, so that the ejection rod pushes the blocking member until the second furnace mouth is opened, and so that the sample stage enters the furnace chamber through the second furnace mouth. The dual-purpose sintering furnace can complete a large amount of sintering as conventional sintering and also implement rapid sintering.

The present invention preferably comprises a system and method for measuring and/or continuously monitoring the temperature and/or height of a molten metal bath in a vessel. Specifically, an ultrasonic transmitter and an ultrasonic receiver are disposed about sides of the vessel and are used to send and receive an ultrasonic signal in order to detect the temperature of the bath. More specifically, the ultrasonic transmitter is configured to send an ultrasonic signal through the vessel, and the ultrasonic receiver is configured to receive that ultrasonic signal after it has traveled through the vessel (comprising the molten metal bath). The ultrasonic receiver provides at least one signal to a processing unit (i.e., control center), which processes the at least one signal to determine the temperature and/or level of the molten metal bath. The invention may further comprise chillers to protect the transmitter and receiver from the heat of the bath.

The present invention preferably comprises a system and method for measuring and/or continuously monitoring the temperature and/or height of a molten metal bath in a vessel. Specifically, an ultrasonic transmitter and an ultrasonic receiver are disposed about sides of the vessel and are used to send and receive an ultrasonic signal in order to detect the temperature of the bath. More specifically, the ultrasonic transmitter is configured to send an ultrasonic signal through the vessel, and the ultrasonic receiver is configured to receive that ultrasonic signal after it has traveled through the vessel (comprising the molten metal bath). The ultrasonic receiver provides at least one signal to a processing unit (i.e., control center), which processes the at least one signal to determine the temperature and/or level of the molten metal bath. The invention may further comprise chillers to protect the transmitter and receiver from the heat of the bath.