94results about How to "Avoid steel breakout accidents" patented technology

Disclosed is a slab continuous casting chamfer crystallizer narrow-face copper plate capable of effectively controlling longitudinal cracks of corners. The working faces of a narrow-face chamfer copper plate (1), which contact with molten steel, comprise a chamfer surface (3), a chamfer surface (4), a plane portion (2) between the two chamfer surfaces, width portions (5 and 6) of the chamfer surfaces (3 and 4) at the positions of the upper opening of a crystallizer and width portions (7 and 8) of the chamfer surfaces (3 and 4) at the positions of the lower opening of the crystallizer. The narrow-face copper plate is characterized in that the sizes of the width portions (7and 8) of the chamfer surfaces at the positions of the lower opening are larger than those of the corresponding width portions (5 and 6) at the positions of the upper opening respectively, so that tapers are formed on the chamfer surfaces (3 and 4) from the width portions (5 and 6) of the chamfer surfaces (3 and 4) at the positions of the upper opening of the crystallizer to the width portions (7 and 8) of the chamfer surfaces (3 and 4) at the positions of the lower opening of the crystallizer, under the condition of different shrinkage masses of solidified shells of the inner width face and the narrow face of the crystallizer, air gaps formed on the chamfer faces due to large shrinkage mass of width faces are eliminated by means of the taper compensation on the chamfer faces, and the longitudinal cracks of the corners and the bleed-out accidents caused by the longitudinal cracks are avoided.

The invention discloses a temperature sensor detection method based on measurement precision. The temperature sensor detection method comprises the following steps of putting a standard temperature sensor and a temperature sensor under detection in the same temperature environment; acquiring a first instant temperature measured by the standard temperature sensor and a second instant temperature measured by the temperature sensor under detection; and comparing the first instant temperature and the second instant temperature to determine whether the temperature sensor under detection is qualified or not. Using the temperature sensor detection method, a user can perform fine detection on the performance of temperature sensors and find out unqualified temperature sensors through the detection, so that when qualified temperature sensors are applied to a steel breakout forecast system, false alarms and failed reports are prevented as much as possible, and accidents of steel breakout are effectively prevented.

The invention discloses a converter lining thickness online testing method and a device thereof. The testing method comprises the following steps: (1) establishing a converter value module by finite element software to perform a steady-state calculation on converter lining temperature and thickness so as to determine distribution of temperature in a converter lining, setting measuring points in a converter body, and obtaining a converter lining temperature-thickness reference table; (2) according to the determined measuring points in step 1, burying thermocouple temperature measuring devices in a lining permanent layer of the converter and the bottom of the converter body; (3) according to data acquired in step 2, combining the converter lining temperature-thickness reference table obtained in step 1 to backward calculate the converter lining thickness; and (4) determining whether to perform repair treatment on the converter lining or not according to the lining thickness obtained in step 3. The device adopted by the invention comprises the converter body (1), and the thermocouple temperature measuring device is arranged in the lining permanent layer (2) of the converter body (1). The method and the device have simple working procedures and high measuring accuracy, and can effectively improve the campaign length of the converter.

A method for preventing a crystallizer of a continuous casting machine from sticking breakout belongs to the technical field of continuous casting methods. Temperature sensors are mounted on four cooling water outlet pipes of the crystallizer, temperature variation values collected by the temperature sensors are input into a recording and analyzing device, and the recoding and analyzing device is used for predicting a danger level of sticking breakout according to water temperature variation conditions of the cooling water outlet pipes and prejudging whether billet shells cracks or not and whether a sticking breakout danger exists or not by judging transient variation of water temperature of the crystallizer, so that a casting speed of the continuous casting machine can be lowered timely, and breakout accidents can be avoided. A prediction method of the method is reasonable in design, convenience in mounting, utilization and maintenance is achieved, costs on purchasing, utilization and maintenance of equipment are low, and applicability to utilization in various iron and steel enterprises is achieved. The method for preventing the crystallizer of the continuous casting machine from sticking breakout has the advantages that the problem of sticking breakout of the crystallizer of the continuous casting machine bothering the iron and steel enterprises for a long time is solved, a worldwide advanced level in the same industry is reached, and obvious economic benefits are provided.

The invention relates to a continuous casting method for steel billets, which comprises the following steps of: injecting molten steel in a plurality of tundishes into a crystallizer in turn, performing continuous casting, and adding crystallizer slag powder into the crystallizer, wherein for each tundish, the addition amount of the crystallizer slag powder ensures that three layers of crystallizer slag powder, namely a raw slag layer, a sintering slag layer and a liquid slag layer, are formed in the crystallizer in turn from top to bottom in a first time period; and the addition amount of the crystallizer slag powder ensures that the sintering slag layer and the liquid slag layer are formed in the crystallizer in turn from top to bottom, or only the liquid slag layer is formed in a second time period, and the thickness of the sintering slag layer is less than 5mm. The continuous casting method for the steel billets can ensure that cold steel is not crystallized on the surface of the molten steel in the crystallizer, and new molten steel and old molten steel are well welded on a weld line when the tundishes are changed, and effectively avoids steel leakage accidents.

The invention discloses a continuous casting machine and a method for exchanging heat of tundish in continuous casting production of the continuous casting machine. The continuous casting machine comprises a steel ladle, a steel ladle rotary table, a steel ladle water gap, a tundish, a tundish water gap, a crystallizer and a guide section, and further comprises a connector, wherein the connector is placed in the crystallizer while exchanging heat of the tundish in continuous casting production; the connector comprises a cylindrical barrel body, a cold material rack supporting base and a cold material rack; the cold material rack supporting base is fixedly arranged on the bottom of the cylindrical barrel body; the cold material rack is fixedly arranged on the cold material rack supporting base in the cylindrical barrel body; the axial center line of the cold material rack is superposed with that of the cylindrical barrel body; and a space between the cylindrical barrel body and the coldmaterial rack is used for placing a short cold material. The method comprises inserting the connector into the crystallizer while exchanging heat of the tundish. According to the continuous casting machine and the method for exchanging heat of the tundish in continuous casting production of the continuous casting machine disclosed by the invention, thickness of a blank shell can be increased, bleed-out can be effectively prevented in the process of exchanging heat of the tundish, and success of exchanging heat of the tundish is guaranteed.

The invention provides continuous casting mold flux for high-carbon cutting mold steel. The continuous casting mold flux comprises the following chemical components in percentage by weight: 28.0-29.0% of CaO, 2-5% of MgO, 31.0-33.0% of SiO2, 4-5% of Al2O3, 8.0-9.0% of Na2O, 9-10% of F, 1.5-2.5% of LiO2, 2.0-2.8% of elemental carbon F.c and the balance of ash content I.L; and the alkalinity R of the mold flux is 0.80-0.95%. The continuous casting mold flux has the beneficial effects that by adjusting the components of the mold flux affecting production characteristics of the cutting mold steel and particularly by adjusting the contents of the flux, F, LiO2 and elemental carbon, the melting point of the mold flux is lowered so as to achieve stable dynamic balance between the melting speed and the inflow speed of the mold flux during the continuous casting process, thus improving the fluidity and crystallization speed of the mold flux during the casting process of the cutting mold steel, lowering the melting speed of the mold flux, realizing stable continuous casting production of the cutting mold steel, ensuring lubricating property of an initial shell of a plate blank in a crystallizer, preventing adhesion or bleed-out accidents caused by slag breakage, and realizing stable and smooth production of the high-carbon cutting mold steel.

The invention relates to a method for mounting and fixing a purging plug brick on outer upper portion of a ladle. The method includes the steps of firstly, fixing a spiral slideway on the inner side of a reference ring of the purging plug brick, fixing a bolt at the bottom of the purging plug brick, sleeving a screwing slider on the outer side of the bolt, and inserting the top end of an automatic torque wrench to the screwing slider; secondly, starting the power of the automatic torque wrench, and allowing rotation torque to drive the screwing slider to be screwed into the purging plug brick along the spiral slideway; thirdly, demounting a nut and the automatic torque wrench, embedding a support brick with ash into a groove of the screwing slider, mounting support iron, a cover plate and the nut, and tightening the nut and the bolt to fix the cover plate and the support iron. The method has the advantages that due to the fact that mounting is performed through the automatic torque wrench, accurate mounting of the purging plug brick is achieved, the purging plug brick defects such as air channels, eccentricity, position difference, large seam and twin brick raising during purging plug brick mounting are overcome, the purging plug brick can be replaced conveniently, and ladle leakage accidents caused by purging plug brick mounting mistakes are avoided.

The invention relates to a hot repairing method of a steel ladle air brick, comprising the following steps: under the condition that the air brick is depressed, adopting a repairing material to carry out hot repairing on the depressed air brick, utilizing the self heat energy of a steel ladle to sinter the repairing material quickly, and utilizing the dispersed air permeability of the sintered repairing material to guarantee the effect of air permeability. The hot repairing method has the advantages of being simple and convenient in operation, effectively prolonging the service life of the air brick and argon-blowing turning up rate, simultaneously effectively avoiding the occurrence of the bleed-out accidents of the steel ladle, reducing the production delay and equipment loss due to the accidents and also reducing the cost.

The invention discloses ladle bottom argon blowing air brick for smelting high-purity high manganese steel. The air brick is prepared from the following materials: forsterite sand, fused magnesia, corundum, sodium silicate, sodium permanganate, an explosion-proof admixture, a polycarboxylate dispersion water reducing agent and water. Uniformly-distributed tiny pores can be formed in the air brickdisclosed by the invention, and the permeation volume is 1.5 times or more than 1.5 times of the permeation volumes of slit and diffuse air bricks; argon is permeated in molten steel through the plurality of pores, so that the purification rate of the molten steel is obviously increased, and the contents of oxygen and hydrogen in the molten steel are reduced; the problems that a small number of straight thick holes are caused by slag-clearing iron oxygen burning, the argon intensively passes through the molten steel and quickly escapes from the liquid level and the like are solved; the purification rate of the molten steel is obviously increased.

The invention relates to a frustum slit type anti-blocking ladle bottom-blown powder injection device, and belongs to the technical field of steel refining. A frustum slit type powder injection component is filled with refractory material, and four frustum-shaped slits are symmetrically distributed in the refractory material. The frustum slit type anti-blocking ladle bottom-blown powder injectiondevice realizes high-efficiency, continuous and stable injection, has high injection rate and low pulsing probability, can obviously improve uniform powder air flow delivery rate in slits, and is stable in injection, low in abrasion of air bricks, safe and reliable.

The invention relates to the technical field of continuous casting processes, in particular to a method for quickly replacing tundish of peritectic steel steel grade. The method for quickly replacingthe tundish of the peritectic steel steel grade comprises the following steps that in a process of pouring molten steel into a mold in the first tundish, the weight of the first molten steel in the first tundish is monitored; the casting speed is reduced according to the weight of the first molten steel and a preset speed reducing rule; the second tundish is centered; a cold water distribution isinjected into the mold when the weight of the first molten steel is reduced to a first preset weight and the casting speed is reduced to a first preset speed; a blind plate is driven into a first tundish car, a connecting part is inserted into the mold, so that the first tundish stops pouring; the first tundish car is driven to a baking position from a pouring position, and a second tundish car isdriven to the pouring position, so that the first tundish is replaced with the second tundish, the tundish quick change efficiency is improved through the second tundish centering and the casting speed controlling process, the cold water distribution is injected into the mold according to the preset target value, a blank shell shrinkage is effectively controlled, and leakage steel accidents are avoided.

The invention relates to automatic flow venting rapid mending material for the refined ladle venting brick. The invention is characterized in that the material consists of the ingredients according to the weight proportion as follows: Al2O3 of 80 to 95, wedding agent of 3 to 15, detonation suppression of 0.1 to 0.5 and preservative agent of 1 to 5. The invention has the advantages of rapid sintering, good venting, no seeping steel, long service life and easy operation.

The alarm for preventing pouring basket from leaking steel consists of two parts including molten steel conducting element and warning device. Two pieces of molten steel conducting elements are set inside the refractory lining in the shock area of pouring basket working layer and connected via wires to outer warning device or emitter. The present invention has the advantages of simple structure, accurate alarming, etc. and may be used in preventing steel leakage accident.

The invention relates the fireproof material, especially the joint filling material used to change revolving furnace tuyere brick. The material comprises 60-80% good magnesia, 20-40% anchoring agent and 0.2-6% addition agent. The invention has good self liquidity. The material is heated, and flows into the gap between tuyere brick and furnace bottom. The material has good intensity, oxidation resistance, and durability.

The invention discloses a permeable dry stamp mass for the furnace bottom of an intermediate frequency furnace. The permeable dry stamp mass is a uniform mixture of 89 percent by weight of refractory aggregate and 11 percent by weight of additive. The permeable dry stamp mass disclosed by the invention is stamped in an area with a diameter being 300-400mm and with an air brick as the center at a top of the air brick, wherein a stamping thickness is 100-250mm; and the whole furnace bottom can be stamped according to the size of the furnace body and a stamping thickness is 100-250mm. Compared with the prior art, a permeable stamp mass is stamped at the top of the air brick, so that the air brick is prevented from directly bearing the corrosion of liquid steel and the service life of the air brick is prolonged. The permeable dry stamp mass disclosed by the invention has the advantages of stable permeable performance, no blockage of an electric furnace subjected to stamping, easy operation, safe smelting and freeness of breakout accidents.

The invention relates to a three-dimensional laser point cloud automatic fusion algorithm for converter in a steel furnace. The algorithm comprises converter area data extraction, converter feature extraction and converter data fusion. The invention has the advantages that: the furnace lining of the steel furnace can be monitored in real time. The erosion condition of the furnace lining of the converter can be automatically detected under the condition of not being shut down. The occurrence of steel leakage accidents of the converter can be prevented. The safety production of the steel furnaceis guaranteed; the furnace lining repair can be reasonably guided. The waste of the furnace charge can be reduced and the service life of the furnace lining is prolonged.

The coated RE wire for continuous casting includes outer casing and wire core coated inside the casing, the outer casing is of steel and the wire core of rare earth material. It may be used in continuous casting to prevent crystallizer protecting dregs from performance degradation, ensure the quality and output of steel product, lower steel production cost and reduce bleedout accidents.

The present invention relates to induction furnace bottom-blowing gas-supplying element corrosion damage detection equipment. Sid equipment includes the following components of corrosion damage detection probe, connector plug, transducer and computer processing system. Said invention also provides the connection mode of all the above-mentioned components and the application range of said detection equipment.

The invention provides a breakout warning method applicable to large slab continuous casters. The breakout warning method comprises: judging whether the rise amplitude of a first row of thermocouplesexceeds a set warning reference value of temperature rise for the first row of thermocouples continuously N1 times, and judging whether rise slope of the first row of thermocouples exceeds a set warning reference value of temperature rise slope for the first row of thermocouples continuously N3 times; if the rise slope of the first row of thermocouples exceeds the set warning reference value of temperature rise slope for the first row of thermocouples continuously N3 times, acquiring light breakout warning information, wherein both N1 and N3 are positive integers. The technical problem is solved that since a breakout warning system of the prior art has long warning judging cycle and provides delayed warnings, breakout accidents still occur and the production requirement for high drawing speed is not met.

The invention discloses a converter with a replaceable furnace bottom and a construction method for primary masonry. The converter comprises a converter bottom shell and a converter body shell which are detachable, a converter body refractory material is built on the inner side of the converter body shell, a converter bottom refractory material is built on the converter bottom shell, the converter bottom shell is connected to the converter body shell, an annular gap is formed between the converter body refractory material and the converter bottom refractory material, an isolating layer is pasted on the vertical surface, on one side of the annular gap, of the converter body refractory material, the annular gap is filled with a special ramming joint material when the converter is constructed for the first time, and the isolating layer isolates adhesion and combination between the converter body refractory material and the ramming joint material. Therefore, when the converter bottom is subjected to hot replacement, the refractory material of the converter body and the ramming material are very easy to separate and easy to disassemble and clean, the construction efficiency of the converter bottom hot replacement is improved, the joint material is filled and tamped in multiple layers, the construction quality is ensured, the erosion speed of molten steel to the joint material is slowed down, and the service life of the converter during primary masonry is greatly prolonged.