CN2610294Y - Sensor for measuring thickness of slag layer of smelting furnace - Google Patents

Abstract

The utility model discloses a smelting-furnace slag layer thickness measuring sensor, wherein a flame proof mud heat and a wire holdfast are adopted to throw metal wires with high fusing point into the smelting-furnace, according to difference between the conductivity of slag layer and the conductivity of liquid steel the resistance value of a resistance measuring unit changes. When metal wires contact furnace slag, the resistance is at Komega grade, and the initial value of the slag layer thickness is recorded. When metal wires contact liquid steel on the bottom of the furnace slag, resistance becomes little instantly and is at omega grade, and the terminating value of the slag layer thickness is recorded. Compared with the existing slag layer thickness measuring technology of manual viewing, the utility model is capable of scientificly and precisely measuring the slag layer thickness in a smelting-furnace, so that the utility model has the advantages of facilitating controlling the smelting-furnace slag layer thickness, improving quality of smelting-furnace, and measuring the liquid level of liquid steel.

Description

The smelted furnace cinder layer thickness measuring

Technical field

The utility model relates to metallurgy industry surveying instrument technical field, particularly smelted furnace cinder layer thickness measuring technique.

Background technology

Thickness of slag layer during the metallurgy industry metal smelting in the stove has considerable influence to metal quality and the composition of smelting, for example in steelmaking process, when slag blanket is thick slag easily in molten steel, when slag blanket is thin in the molten steel impurity content big, therefore, suitable thickness of slag layer is a technical parameter of steel-making.At present to the measuring method accurately and reliably of thickness of slag layer neither one in the smelting furnace, just estimate thickness of slag layer in the smelting furnace with operating personnel's empiric observation, this must have very mistake with observing the way of estimating, makes the not assurance of metal quality of smelting.

The utility model content

The purpose of this utility model provides a kind of smelted furnace cinder layer thickness measuring, and this sensor can be measured thickness of slag layer in the smelting furnace exactly, also can measure the liquid steel level position simultaneously, can improve the quality of metal smelt.

For achieving the above object, the technical scheme that the utility model is taked is: a kind of smelted furnace cinder layer thickness measuring, this sensor comprise fire clay head, paper tube, wire support, copper cash, iron plate, tinsel, paper cap and protection paper web that fusing point is high; Described fire clay head is inverted boss shape; there is a circular port in the centre; described paper tube is fixedlyed connected with the lower end of mud head; the diameter of bore of paper tube is identical with the diameter of bore of mud head; described wire support is an insulating material pipe; the lower end of two copper cash is separately fixed on the wire support; the upper end of two copper cash is stretched out the upper end of wire support respectively; described iron plate is two elongated iron plates; its lower end is welded on the upper end of two copper cash respectively; the high lower end wiry of described two fusing points is welded on the upper end of two iron plates respectively; above-mentioned lead and wire support insert in the center pit of paper tube and mud head together, the upper surface of the high mud extraction head in upper end wiry that described two fusing points are high, and described paper cap is buckled in the upper end of mud head; and be fixed in the groove of mud head upper end, described protection paper web fixed bonding is on the boss of mud head.

Described fire clay head is inverted boss shape, its first half cylinder diameter is greater than Lower Half cylinder diameter, a circular channel is arranged in the centre of mud head, described wire support is placed in this circular channel, one groove is arranged at the top in first half cylinder, and described paper cap is fixed in this groove.

Described wire support is the special-shaped pipe that an insulating material is made, the external diameter of this pipe and the internal diameter of paper tube match, in the periphery, bottom of wire support is a round ring boss, the external diameter of boss equals the external diameter of paper tube, in the time of in the center pit of wire support insertion paper tube and mud head, this round ring boss is clamped on the lower surface of paper tube.

The tinsel that described fusing point is high is a tungsten filament, or molybdenum filament, or the molybdenum and tungsten alloy silk etc.

The smelted furnace cinder layer thickness measuring that the utility model provides has following beneficial effect:

1, can measure the interior thickness of slag layer of smelting furnace exactly, could control thickness of slag layer effectively, the metal quality of smelting is improved.The principle of work of this smelted furnace cinder layer thickness measuring is: two copper conductors and the resistance measurement instrument that will be fixed on the sensor inside conductor support are connected, again the thickness of slag layer survey sensor is placed perpendicular to smelting furnace, make sensor at the uniform velocity fall in the metallurgical furnace by self-con-tained unit, because temperature is very high in the stove, the paper cap that is positioned at sensor front end is burnt, two refractory metal silks (for example molybdenum filament) are very big with the resistance value that shows before slag contacts, when touching slag blanket, because slag blanket conduction, the resistance change that the resistance measurement instrument is shown is a K Ω level, can write down the thickness of slag layer initial value this moment automatically, along with sensor moves downward, resistance value continues to descend, when molybdenum filament touched the molten steel of slag blanket bottom, resistance moment became very little, is generally the Ω level, this moment is the stop value of record thickness of slag layer automatically, so thickness of slag layer just can directly demonstrate accurate values.Compare with original employing artificial observation method, adopt this device can scientifically measure thickness of slag layer in the smelting furnace exactly,, just can help controlling thickness of slag layer, smelting quality is improved owing to can accurately measure thickness of slag layer.

2, can accurately measure the liquid steel level position.Also can measure the liquid steel level position simultaneously by this smelted furnace cinder layer thickness measuring, as previously mentioned, when molybdenum filament touched liquid steel level, resistance moment became very little, can demonstrate the liquid steel level position by measuring apparatus.

Description of drawings

Fig. 1 is a smelted furnace cinder layer thickness measuring structural representation;

Fig. 2 is the wire support structural representation;

Fig. 3 is the vertical view of Fig. 2.

Embodiment

With reference to accompanying drawing 1, make boss shape mud head 1 with fire clay, boss is inverted, its first half is the cylinder of external diameter 30mm, long 8mm, Lower Half is the cylinder of external diameter 12mm, long 20mm, the centre of mud head 1 has the circular hole that diameter is 10mm, form cylindrical channel, having diameter in first half cylinder is that 20mm, height are the circular groove of 4mm, it is that 10mm, length are the cylinder of 36mm that the cardboard that described paper tube 2 usefulness wall thickness are 1mm rolls into endoporus, and paper tube 2 is bonded in the lower surface of mud head 1 with fire clay.With reference to accompanying drawing 2 and accompanying drawing 3, the bottom of wire support 3 is that a plastic plate is made round tube, the internal diameter of the external diameter of round tube and paper tube 2 matches, be 10mm, bottom periphery at round tube has a round ring boss, the external diameter 14mm of this boss, when wire support 3 inserted the cylindrical channel of paper tube 2 and mud head 1 formation, this round ring boss was clamped on the lower surface of paper tube 2.The top of described wire support 3 is the cruciform frame that plastic plate is made, and this cruciform stand drops on the plastic round tube upper end, and is injected into one with plastic round tube.The lower end of two copper cash 4 is separately fixed on the different parts of plastics round tube tube wall of wire support 3; the upper end of two copper cash 4 is passed the upper end of stretching out wire support 3 behind the position, the corresponding both sides of cruciform frame respectively; again the lower end of two elongated iron plates 5 is welded on the upper end of two copper cash 4 respectively; then the lower end of two molybdenum filaments 6 is welded on the upper end of iron plate 5 respectively; the wire support 3 that will fix above-mentioned lead is subsequently penetrated in the cylindrical channel that is made of mud head 1 and paper tube 2 by the endoporus of paper tube 2; as shown in Figure 1; the round ring boss of wire support 3 bottoms is clamped on the bottom of paper tube 2; the distance of mud head 1 upper end is stretched out greatly about about 12mm in the upper end of two molybdenum filaments 6; two molybdenum filaments 6 are separately put the upright position; being poured into quick hardening cement then makes molybdenum filament 6 fixing in the circular hole of mud head 1; the external diameter of described paper cap 7 is 19mm; highly be 20mm; paper cap 7 is buckled in the upper end of mud head 1; paper cap 7 is fixed in the groove of mud head 1 upper end with quick hardening cement; it is 30mm that described protection paper web 8 is made external diameter for the thick board rolls of 10mm; length is the cylinder of 1000mm; protection paper web 8 usefulness high-temp glue are bonded on the lower surface of mud head 1 first half cylinder, have so just made the smelted furnace cinder layer thickness measuring.When needs are measured the smelted furnace cinder layer thickness, copper cash on the wire support 34 is connected with resistance measuring instrument, this sensor is placed perpendicular to smelting furnace, by self-con-tained unit sensor is at the uniform velocity fallen in the smelting furnace, its test process and principle are as previously mentioned.

Claims (4)

1, a kind of smelted furnace cinder layer thickness measuring is characterized in that: this sensor comprises fire clay head (1), paper tube (2), wire support (3), copper cash (4), iron plate (5), tinsel (6), paper cap (7) and protection paper web (8) that fusing point is high; Described fire clay head (1) is inverted boss shape; there is a circular port in the centre; described paper tube (2) is fixedlyed connected with the lower end of mud head (1); the diameter of bore of paper tube (2) is identical with the diameter of bore of mud head (1); described wire support (3) is an insulating material pipe; the lower end of two copper cash (4) is separately fixed on the wire support (3); the upper end of two copper cash (4) is stretched out the upper end of wire support (3) respectively; described iron plate (5) is two elongated iron plates; its lower end is welded on the upper end of two copper cash (4) respectively; the lower end of the tinsel (6) that described two fusing points are high is welded on the upper end of two iron plates (5) respectively; above-mentioned lead and wire support (3) insert in the center pit of paper tube (2) and mud head (1) together; the upper surface of the high mud extraction head in upper end (1) of the tinsel (6) that described two fusing points are high; described paper cap (7) is buckled in the upper end of mud head (1); and be fixed in the groove of mud head (1) upper end, described protection paper web (8) fixed bonding is on the boss of mud head (1).

2, smelted furnace cinder layer thickness measuring according to claim 1, it is characterized in that: described fire clay head (1) is inverted boss shape, its first half cylinder diameter is greater than Lower Half cylinder diameter, in the centre of mud head (1) circular channel is arranged, described wire support (3) is placed in this circular channel, one groove is arranged at the top in first half cylinder, and described paper cap (7) is fixed in this groove.

3, smelted furnace cinder layer thickness measuring according to claim 1, it is characterized in that: described wire support (3) is the special-shaped pipe that an insulating material is made, the internal diameter of the external diameter of this pipe and paper tube (2) matches, in the periphery, bottom of wire support (3) is a round ring boss, the external diameter of boss equals the external diameter of paper tube (2), in the time of in the center pit of wire support (3) insertion paper tube (2) and mud head (1), this round ring boss is clamped on the lower surface of paper tube (2).

4, smelted furnace cinder layer thickness measuring according to claim 1 is characterized in that: the tinsel that described fusing point is high (6) is a tungsten filament, or molybdenum filament, or the molybdenum and tungsten alloy silk.