36 results about "Semi-steel" patented technology

The invention provides a method for reducing harmful components in vanadium slag, which comprises the following steps of: smelting vanadium-containing molten iron in a vanadium extraction converter by adopting a top-bottom combined blowing process in the vanadium extraction converter process to obtain semi-steel and vanadium slag; the top-bottom combined blowing process comprises top blowing of oxygen and bottom blowing of nitrogen; the nitrogen bottom blowing comprises first-stage low bottom blowing stirring, second-stage strong bottom blowing stirring and third-stage high-strength bottom blowing stirring, a coolant is added in the first-stage low bottom blowing stirring and the second-stage strong bottom blowing stirring, and lime is added in the third-stage high-strength bottom blowing stirring. In the blowing process, the coolant is added in the first two stages of nitrogen bottom blowing, the lime is added in the third stage for slag state adjustment, finally, the content of harmful ingredients such as P, Pb and Zn in the vanadium slag is low, follow-up oxidizing roasting and leaching of the vanadium slag are facilitated, and therefore the comprehensive utilization rate of vanadium and the quality of vanadium products are improved.

The utility model discloses a semi-steel assembly bending die, particularly relates to metronome field, including semi-steel assembly and bending die, the semi-steel assembly includes horizontal section, first bending section and second bending section, and the first bending section, second bending section and horizontal section constitute 'U' shape, the first bending section and the second bending section are both connected with connecting joints, the semi-steel assembly is embedded into the bending die after being bent, a stamping connecting groove is formed in the top of the bending die, auxiliary holes are formed in the position, parallel to the transverse section, of the bending die, and the two auxiliary holes communicate with the stamping connecting groove. A first stamping protruding block and a second stamping protruding block are arranged on the two sides of the bending die correspondingly. The semi-steel assembly die can be obtained through one-time stamping, rapid forming of the semi-steel assembly die can be achieved, and a bent semi-steel assembly can be rapidly taken out.

The invention relates to the technical field of iron and steel smelting, in particular to an efficient semi-steel desulfurization method which comprises the following steps: performing rotary injection stirring desulfurization treatment on semi-steel; in the desulfurization treatment process, desulfurized alloy and passivated lime are adopted as desulfurizers; the desulfurized alloy and the passivated lime are injected into the semi-steel in different channels and different positions for desulfurization; and the desulfurization alloy is an MgAlCa alloy. According to the efficient desulfurization method for the semi-steel, the sulfur content in the semi-steel can be effectively reduced, and production of ultra-low sulfur steel is supported.

The invention discloses a semi-steel steelmaking method for SPA-H weathering resistant steel using roughing slag for slagging, which comprises the following steps of: smelting semi-steel in a converter, and adding the roughing slag of a steelmaking furnace as a slagging material for slagging in the blowing process; the roughing slag of the steel smelting furnace is added in two batches, the first batch of roughing slag is added from the blowing oxygen step to 40%-50%, and the adding amount is 70%-80% of the total mass; the adding time of the second batch is from the blowing oxygen step to 60%-70%, and the adding amount is 20%-30% of the total mass; in the blowing process, the lance position of an oxygen lance is controlled in a high-low-low mode, the lance position in the early stage of the oxygen blowing process is 1.7-1.8 m, the lance position in the middle stage of the oxygen blowing process is 1.55-1.65 m, and the lance position in the later stage of the oxygen blowing process is 1.4-1.45 m. The method can safely and stably use the tapping slag in the steelmaking process, controls the dephosphorization rate in a suitable range, realizes cyclic utilization of the tapping slag of the steelmaking furnace in the steelmaking process, avoids resource waste, reduces the steelmaking production cost, and has the characteristics of good safety, low cost, energy conservation and environmental protection.

The invention discloses a preparation method of high-toughness semi-steel for an H-shaped steel rolling roll collar and a semi-steel roll, and belongs to the technical field of steel rolling, the preparation method comprises the following steps: 1, preparing materials according to the chemical composition proportion of a semi-steel alloy material; 2, according to the total weight and the chemical component proportion of each furnace of semi-steel alloy, various raw materials and intermediate alloy are calculated and prepared respectively, and are added into a smelting furnace for smelting; thirdly, the temperature in the furnace is adjusted, the aluminum-cerium-rare earth intermediate alloy is added in batches, and heat preservation and standing are conducted; after standing is completed, the temperature of the molten steel is adjusted; 4, uniformly spreading an aluminum-cerium-rare earth intermediate alloy, an aluminum-yttrium intermediate alloy and a rare earth-silicon-calcium alterant at the bottom of the tundish, and pouring the molten steel into the tundish; fifthly, the semi-steel melt in the tundish is subjected to centrifugal casting; 6, normalizing and tempering the semi-steel casting; and finally, the semi-steel casting is subjected to high-temperature tempering treatment. The room-temperature impact absorbing energy of the semi-steel material reaches 20-28 J and is far higher than that of a traditional commercial semi-steel material.

The invention relates to the technical field of welding of semi-steel cables, in particular to an induction welding tool for a semi-steel cable and a welding method of the induction welding tool, and the welding tool comprises a coaxial positioning mechanism, an induction welding mechanism, a data acquisition assembly, an end face inclination angle judgment module, a coaxiality detection module, an eccentric torque correction module and a welding quality detection module; the method comprises the following steps: determining whether the fitting end surface has angular inclination or not based on a circumferential pressure balance index; under the condition that angular inclination exists, whether the coaxiality is qualified or not is determined based on the horizontal distance between the clamping groove and the vertical center line of the counter bore; whether the gravity eccentric torque of the semi-steel workpiece is qualified or not is determined based on the bending deflection amount of the semi-steel workpiece, and the righting distance of the righting block is adjusted based on the unqualified condition; and the tail pipe and the semi-steel workpiece are welded, and whether the welding quality is qualified or not is determined based on the circumferential spreading uniformity of the metallurgical bonding layer so as to optimize the preset equilibrium index. The welding quality of the tail pipe and the semi-steel workpiece is improved.

The invention relates to the technical field of converter semisteel smelting, in particular to a converter semisteel smelting molten iron tank sticking treatment system which comprises a supporting platform and a molten iron tank, the molten iron tank is placed in the center of the front side of the upper end of the supporting platform, a protection assembly is arranged on the outer side of the molten iron tank, and a converter assembly is installed above a second cushion block and a first cushion block. Through cooperation of a converter, a heavy hydraulic motor and a molten iron tank, molten iron is loaded into the converter according to the residual tank capacity of the molten iron tank, blowing is conducted for 3-5 minutes, 8 kg / t of magnesium balls and 30 kg / t of lime are added during blowing, the tapping temperature is controlled to range from 1500 DEG C to 1560 DEG C, semi-steel stops flowing in the molten iron tank for 0.5-1 hour, then iron is added into the converter, sticking substances on the wall of the molten iron slag tank are removed through multiple times of melting-scouring circulation, and the molten iron slag tank is obtained. The problem of insufficient volume caused by tank sticking is solved, and normal operation of smelting equipment is guaranteed.

The invention belongs to the technical field of vanadium extraction semisteel desulfurization, and discloses a converter vanadium extraction semisteel tapping stirring desulfurization method, which comprises the following steps of: in a vanadium extraction converter semisteel tapping process, synchronously adding a silicon-calcium-barium deoxidizer into a semisteel ladle along with a steel flow to carry out deoxidation operation, and then carrying out desulfurization treatment on the deoxidized semisteel by using a KR mechanical stirring method, a desulfurizing agent used for KR desulfurization contains 80 to 85 weight percent of CaO and 6 to 8 weight percent of CaF2. According to the method, deoxidation is conducted before desulfurization, the desulfurization reaction efficiency is improved, the problems that a lime (CaO)-based desulfurizing agent is low in desulfurization reaction efficiency and poor in desulfurization effect and a vanadium extraction semisteel desulfurizing agent is large in loss are solved, lime and fluorite serve as raw materials of the desulfurizing agent, and the desulfurization cost is remarkably reduced.

The invention discloses a desulfurization method capable of prolonging the service life of a desulfurization rotary stirring spray gun, which comprises the following steps: carrying out rotary injection stirring desulfurization on semisteel subjected to vanadium extraction treatment, and ensuring that the desulfurization time is T; at the stage that the desulfurization time is 0-1 / 4 T, a desulfurization rotary stirring spray gun is inserted below the liquid level of a semi-steel ladle, the depth of a molten pool is 20%-30%, and the rotation speed is 30-50 r / min; at the stage that the desulfurization time is 1 / 4-1 / 2 T, a desulfurization rotary stirring spray gun is inserted below the liquid level of a semisteel ladle, the depth of a molten pool is 30-60%, and the rotation speed is 60-90 r / min; and in the stage that the desulfurization time is 1 / 2T-3 / 4T, a desulfurization rotary stirring spray gun is inserted below the liquid level of a semi-steel ladle, the depth of a molten pool is 60-80%, and the rotation speed is 90-120r / min. According to the desulfurization method, the service life of the rotary blowing stirring spray gun is prolonged from about 1000 min to 1500 min or above.

This invention discloses a process for smelting high-phosphorus weathering steel through decarburization and phosphorus retention. The process involves using a decarburization converter to decarburize blast furnace hot metal to obtain semi-steel, which is then tapped to a ladle at 1330–1420°C and slag removed. The semi-steel undergoes deep decarburization and reduction in an AOD converter, with alloying elements added according to the steel grade composition. The alloyed steel is then transported to an LF furnace for refining, where alloys are added to fine-tune the composition according to the steel grade's chemical requirements. Finally, the refined steel is transported to a continuous casting platform for casting, yielding high-phosphorus weathering steel slabs. This invention utilizes a decarburization converter without adding any alkaline slag-forming agents, achieving efficient decarburization and phosphorus retention to obtain semi-steel with a phosphorus content close to that of the original hot metal, resulting in low smelting costs. The semi-steel's entry into the AOD converter significantly improves the decarburization and chromium retention conditions, increasing the AOD furnace's production efficiency. The LF furnace's white slag formation, deep desulfurization, temperature increase, and alloy composition fine-tuning ensure the purity and castability of the molten steel, creating favorable conditions for the slab continuous casting process.

The invention discloses a steelmaking slag former produced by using iron-containing dust and a use method thereof, and aims to solve the problems of low utilization rate of iron-containing dust in iron and steel enterprises, difficulty in slagging in low-silicon molten iron / semi-steel steelmaking, poor dephosphorization effect and the like. The steelmaking slag former is prepared by uniformly mixing iron-containing dust and mud with limestone powder or lime powder according to a ratio, directly feeding the mixture into a kiln or roasting the mixture at 800-1250 DEG C in a ball-pressing manner, and ingredients containing SiO2 or SiO2 and Al2O3 can be added as required. Iron resources and various beneficial components in the iron-containing dust sludge are fully utilized, the low-melting-point pre-melting slag former is formed after roasting, the slag former has the advantages of being high in slag forming speed, good in dephosphorization effect, small in converter blowing temperature drop and the like, metallurgical lime can be partially or completely replaced, and the slag former is suitable for different blowing scenes such as normal molten iron, low-silicon molten iron and semisteel; and the additional value of the iron-containing dust mud is remarkably improved, the smelting cost is reduced, the metal loss and splashing phenomena are reduced, and good industrial application value is achieved.

The invention discloses a semi-steel desulfurization method, and belongs to the field of steel smelting. The method comprises the following steps: S1, extracting vanadium from vanadium-containing molten iron to obtain semisteel; the semi-steel and a first desulfurizing agent are mixed and then subjected to pre-desulfurization, and the first desulfurizing agent is fly ash of an electrolytic aluminum factory, active lime, aluminum particles and silicon iron; s2, mixing the pre-desulfurized semi-steel with a second desulfurizer, and stirring for desulfurization to obtain desulfurized semi-steel; the second desulfurizing agent is lime, the stirring desulfurization is carried out while whole-course gas blowing stirring is carried out, and the gas for gas blowing stirring is mixed gas of inert gas and reducing gas. The problem of poor desulfurization effect of vanadium extraction semisteel can be effectively avoided, the desulfurization effect is improved, the problem that the pretreatment desulfurization cost is increased after the sulfur content of the molten iron is increased is reduced, and a technical support is provided for producing low-sulfur steel by adopting the vanadium-containing molten iron.

The invention belongs to the technical field of semi-steel dephosphorization, and discloses a semi-steel dephosphorization agent and a semi-steel pre-dephosphorization method, the semi-steel dephosphorization agent is composed of oxide scale and lime according to the mass ratio of 1: (1.5-2.5), the FeO content of the oxide scale is larger than or equal to 50 wt%, the CaO content of the lime is larger than or equal to 85 wt%, and the activity degree is larger than 350 mL. The semi-steel pre-dephosphorizing method comprises the following steps: in the semi-steel tapping process of a converter, adding the semi-steel dephosphorizing agent into a semi-steel ladle according to the adding amount of 4.375 kg of oxide scale per ton of semi-steel, and introducing nitrogen for blowing after the semi-steel tapping is completed. The semisteel dephosphorizing agent provided by the invention is good in dephosphorizing effect, free of pollution to the environment, free of corrosion, easy to store and free of potential safety hazards and environmental pollution problems; meanwhile, the semi-steel pre-dephosphorization method is easy to operate, facilities and equipment do not need to be additionally built, the dephosphorization rate outside the converter can reach 10%-20%, the converter dephosphorization load is relieved, and the smelting period is shortened.

This invention relates to a vanadium-containing molten iron converter smelting process, comprising: S1, pre-treating and desulfurizing vanadium-titanium molten iron; S2, placing the desulfurized molten iron into a vanadium extraction converter for vanadium extraction and dephosphorization; and S3, subjecting the vanadium-extracted and dephosphorized semi-steel to high-carbon smelting in a steelmaking converter, thereby obtaining pure molten steel with high carbon, high manganese, low nitrogen, low phosphorus, and low oxygen content. Unlike existing technologies in the field, this invention, through the design of the vanadium-containing molten iron process flow, achieves coordinated operation of each step, effectively avoiding problems such as insufficient heat source, high oxidizing properties, and difficulty in controlling phosphorus levels in the final molten steel during vanadium-containing molten iron smelting.

The invention provides a semi-steel steelmaking method for smelting SPA-H weathering resistant steel at low cost, the purpose of producing the SPA-H weathering resistant steel at low cost is achieved by developing a scrap steel structure and adjusting the corresponding converter steelmaking gun position, flow and the like in a matched mode, and the method comprises the following steps that scrap steel is directly added into a converter through a hopper before iron is added into the converter; after vanadium extraction semisteel is added into the converter, oxygen blowing is started, magnesium slag charge is added for slagging in the oxygen blowing process, converter dephosphorization is controlled by changing the lance position of an oxygen lance, the oxygen supply strength and the slag charge adding time, converter decarbonization is completed, and qualified molten steel is obtained. The method provided by the invention realizes cyclic utilization of the converter steel slag, is beneficial to reducing the amount of steel slag generated in the smelting process of weathering steel, reducing metal iron loss caused by iron elements in steel entering the slag, reducing the consumption of slag making materials in the smelting process, achieving the purpose of saving the production cost, reducing the emission of converter wastes, and being beneficial to environmental protection.

The invention discloses a method for preparing high-purity pig iron based on vanadium-containing molten iron two-step converter smelting, and belongs to the technical field of ferrous metallurgy. The method comprises the following steps: injecting vanadium-containing molten iron with specific components into a converter, and sequentially carrying out first-step blowing vanadium extraction and second-step blowing dephosphorization; in the vanadium extraction stage, the oxygen blowing strength is controlled to be 2.5-3.5 Nm / (min.ton), the final temperature is 1350-1380 DEG C, semisteel with V smaller than or equal to 0.05% is obtained, and vanadium slag with V larger than or equal to 12% is recycled; in the dephosphorization stage, 15-25 kg / ton of a lime-based dephosphorization agent is added, the oxygen blowing strength is controlled to be 1.5-2.5 Nm / (min.ton), the final temperature is 1320-1350 DEG C, and P is smaller than or equal to 0.015%; then the semi-steel is transferred into an LF furnace for deep desulfurization until S is smaller than or equal to 0.015%, and the content of C and Si is adjusted; and finally, the C1 / C2-grade high-purity pig iron meeting GB / T 718-2024 is obtained through casting. The method realizes efficient recovery of vanadium resources and low-cost preparation of high-purity pig iron, and is compact in process, low in energy consumption and suitable for industrial application.

The application discloses a vanadium element extraction method in low-silicon high-chromium molten iron, and relates to the field of blast furnace ironmaking.The method solves the problems of high cost and low extraction efficiency of the existing vanadium element extraction method in low-silicon high-chromium molten iron.The vanadium element extraction method comprises the following steps: S1, providing low-silicon high-chromium molten iron, a cooling agent and a slag adjusting agent;S2, adding the cooling agent and the low-silicon high-chromium molten iron into a converter respectively to perform first mixing, and obtaining a first mixture;S3, igniting the converter, adding the slag adjusting agent into the first mixture to perform second mixing, and then performing blowing and smelting to obtain a second mixture;S4, after the blowing and smelting are completed, tilting the converter to discharge semi-steel in the second mixture, pouring the semi-steel into a semi-steel ladle, and leaving vanadium slag remaining in the converter;S5, repeating steps S3 and S4 for a preset number of times, and then pouring all the vanadium slag remaining in the converter into a vanadium slag tank to obtain finished vanadium slag.The method has low cost and high extraction efficiency.

The utility model provides an environment-friendly premelting type semi-steel slagging material. The environment-friendly premelting type semi-steel slagging material comprises a slag block formed by premelting a manganese slag material, the framework is made of an iron-based material or an iron oxide material, and the framework at least penetrates through the center of the slag block and is exposed out of the surface of the slag block. After the environment-friendly pre-melting type semi-steel slagging material is put into a converter, on one hand, the framework can quickly transfer heat to the center of a slag block to promote the slag block to be quickly disintegrated; on the other hand, due to the characteristic that the melting point of the framework is lower than that of most materials (such as SiO2 and CaO) in the slag block, the framework can be fused firstly, so that disintegration of the slag block from the center to the outside is further accelerated, effective components in the slag block are rapidly dispersed into the semisteel in a larger area, the slagging efficiency in the semisteel and the effective utilization rate of a slagging constituent are improved, and the service life of the slag block is prolonged. The use amount of the manganese slag can be reduced, so that the production cost of the converter process is reduced by reducing the use amount of the manganese slag.

The application discloses a method for calculating slag-remaining parameters of a semi-steel smelting converter, which comprises the following steps: measuring the slag-remaining weight under different slag-discharging angles of a preset number of furnaces; determining a critical angle for starting slag discharge; establishing a slag-remaining weight calculation model, wherein W 留渣 is the slag-remaining weight, α 有效 is an effective slag-discharging angle and is the maximum value between the critical angle and the maximum angle after slag discharge is completed; determining the values of a, b and c based on the least square method by using the slag-remaining weight of the preset number of furnaces and the effective slag-discharging angle; and substituting the obtained values of a, b and c into the slag-remaining weight calculation model to obtain a high-precision slag-remaining weight calculation formula. The method can quickly and real-timely output the slag-remaining parameters, improve the precision of heat balance calculation, stabilize end-point control and reduce production cost. The semi-steel smelting converter slag-remaining parameter calculation device, equipment and storage medium disclosed by the application have the same advantages.

This invention discloses a vanadium-extracting slag conditioner and its preparation method, relating to the field of blast furnace ironmaking. It solves the problems of existing vanadium-extracting slag conditioners, such as high cost, inconvenience in furnace loading, high MFe content in the slag, and high residual vanadium in semi-steel. The slag conditioner is composed of the following weight percentages: 4-6% Al₂O₃, 15-22% SiO₂, 70-75% FeO, and 1.5-3% MgO. A method for preparing the vanadium-extracting slag conditioner is also provided: raw materials are weighed according to a certain ratio, mixed for a first processing time to obtain a first raw material; the first raw material is then introduced into a granulation device for a second processing time to obtain the finished granular slag conditioner. By adjusting the appropriate proportions of the slag conditioner, adding suitable amounts of Al₂O₃ and SiO₂, increasing the proportion of FeO in the slag conditioner, and adjusting the ratio of MgO to Al₂O₃, setting the mass ratio of Al₂O₃ to MgO to 1.2-4, the MFe content and residual vanadium in the slag are effectively reduced.

The invention relates to the field of metallurgy, and provides a control method for producing low-nitrogen high-strength steel from semi-steel. The method comprises the steps that vanadium in blast furnace molten iron is extracted through a vanadium extraction converter, and obtained vanadium-extracted molten steel serves as semisteel; a desulfurizing agent is added into the semisteel, and desulfurization pretreatment is conducted through composite injection; the desulfurized semisteel enters an LD converter and an LF furnace in sequence for refining; and the refined semisteel is subjected to vacuum degassing and then cast into the low-nitrogen high-strength steel. The argon and other inert gases are blown into the molten steel to form a large number of bubbles and drive the molten steel to circularly flow, so that the contact area and contact time of the molten steel and a gas phase are increased, escape of nitrogen and other gases is facilitated, the nitrogen content in steel is reduced, the quality of steel is improved, semi-steel becomes low-nitrogen high-strength steel, the yield is increased, and the production cost is reduced. And waste in the production process is reduced.

The utility model discloses a semi-steel tread cloth liner finishing device, which relates to the technical field of tread cloth liner finishing devices, and comprises a base, a support frame is arranged on the base, and the base is provided with a cloth liner rolling assembly, a rough deviation rectifying assembly, a fine deviation rectifying assembly and a rolling assembly used for collecting cloth liners. The rough deviation rectifying assembly and the rolling assembly are located at the two ends of the base, the cloth liner roll assembly and the fine deviation rectifying assembly are arranged between the rough deviation rectifying assembly and the rolling assembly, the fine deviation rectifying assembly is arranged at the top end of the supporting frame, and the rolling wheel assembly is arranged at the bottom end of the base. According to the utility model, through the mutual cooperation of the rough deviation rectifying assembly and the fine deviation rectifying assembly, the left-right deviation of the cloth liner roll can be effectively rectified, so that the rolling tension fluctuation of the cloth liner roll is avoided in the tread production process, and the tread rubber stability is ensured.

The invention provides a converter oxygen-nitrogen mixed blowing manganese removal steel smelting method which comprises the following steps: S1, oxygen-nitrogen mixed blowing operation: starting an oxygen supply system and a nitrogen supply system, mixing oxygen and nitrogen according to a certain proportion, and blowing into a steel molten pool of a converter; s2, slag control and adjustment: in the oxygen-nitrogen mixed blowing process, according to the components and properties of the slag, slag making materials are added to control the alkalinity and fluidity of the slag, and the target value of the alkalinity is controlled to be 1.6-2.2; s3, controlling the temperature in the smelting process, wherein the final target temperature of the semisteel is 1330-1415 DEG C; and S4, remelting the semisteel for secondary smelting: putting the smelted semisteel into a ladle through a tapping hole according to the target manganese content and other quality indexes of the ultra-low manganese steel, and carrying out secondary pure oxygen blowing after slag-iron separation. According to the invention, the demanganizing efficiency and precision can be improved.

The application relates to the field of steel smelting, in particular to a preparation method of low-phosphorus low-sulfur high-manganese steel; the method comprises the following steps: carrying out desulfurization treatment on molten iron with a preset sulfur content to obtain desulfurized molten iron; carrying out dephosphorization treatment on the desulfurized molten iron with a first preset phosphorus content to obtain dephosphorized semi-steel; carrying out decarburization and dephosphorization smelting on the dephosphorized semi-steel with a second preset phosphorus content to obtain manganese-containing steel liquid; carrying out refining on the manganese-containing steel liquid, then carrying out vacuum degassing treatment, and then carrying out pouring to obtain low-phosphorus low-sulfur high-manganese steel billets; wherein, the first manganese raw material is added in the decarburization and dephosphorization smelting process, and the second manganese raw material is added in the refining process; the desulfurized molten iron is subjected to dephosphorization treatment, decarburization and dephosphorization treatment, desulfurization treatment and degassing treatment, the first manganese raw material and the second manganese raw material are added in the decarburization and dephosphorization smelting process and the desulfurization process respectively, the phosphorus content of the first manganese raw material and the second manganese raw material is limited, the sulfur content in the steel liquid is removed in the desulfurization process, and the low-phosphorus and low-sulfur content targets of the high-manganese steel are achieved.

The invention discloses a semisteel smelting method for inhibiting converter slag foaming, which comprises the following steps: 1) after converter iron blending is finished, setting a gun position to an initial blowing gun position; (2) after blowing is started, a first batch of slagging materials are added in the initial stage of smelting; and 3) when the audio value is reduced to the audio value V sound, pressing the gun and adding the residual slagging material. According to the method, slagging materials are added in batches according to the weight and temperature information of semi-steel in the initial stage of smelting, and when an audio value is reduced to a certain value, a gun is pressed in time, and the FeO content in slag is reduced; particularly, the residual slagging material is added while the gun is pressed, so that the viscosity of the slag is further improved. By pressing the gun in time and increasing the later-stage slag adding amount, the FeO content in the slag is reduced, the viscosity of the slag is improved, slag foaming is inhibited economically, efficiently and simply, the molten steel yield is increased, the tapping slag overflowing risk is reduced, and the production cost is reduced.

This invention discloses a smelting method for using waste bricks from aluminum electrolytic cells as a heating and fluxing agent in converter semi-steel smelting. The method involves adding waste brick particles from aluminum electrolytic cells with a SiC mass fraction ≥60% to the converter before or during the early blowing stage. The amount of waste bricks added, the oxygen lance height, the oxygen supply intensity, and the addition method are precisely controlled according to the initial carbon content. The waste bricks used are primarily composed of silicon carbide (SiC), supplemented with small amounts of Si3N4, Na2SiO3, and NaF. The exothermic oxidation of these bricks provides chemical heat to the molten pool, and the reaction product SiO2 effectively improves slag fluidity. This invention effectively consumes the waste bricks from aluminum electrolytic cells while solving problems such as insufficient heat and poor fluidity in semi-steel smelting. Using this method, the consumption of heating agent can be reduced by 1-5 kg ​​per ton of steel, flux consumption by 1-3 kg, slag formation time shortened by more than 10%, and dephosphorization rate increased by more than 2%, achieving high-value-added resource utilization of industrial solid hazardous waste and optimization of semi-steel smelting processes.

The application discloses a method for determining the temperature of molten iron entering a semi-steel smelting converter, comprising the following steps: pre-calibrating the effective temperature drop rate of the molten iron transfer process after desulfurization; establishing a corresponding database containing semi-steel tank numbers, post-desulfurization temperatures and temperature measurement time points; identifying the actual semi-steel tank number entering the converter, and matching the corresponding post-desulfurization temperature and temperature measurement time point from the database; and online calculating and determining the temperature of the molten iron entering the converter according to the post-desulfurization temperature, the temperature measurement time point, the iron mixing start time and the effective temperature drop rate. The method can eliminate the temperature calculation errors caused by scheduling changes in the multi-desulfurization station and multi-converter cross logistics mode, improve the calculation accuracy of the temperature of the molten iron entering the converter, improve the converter endpoint hit rate, reduce the blow rate, reduce the oxygen and steel material consumption, and reduce the production cost. The application also discloses a device and equipment for determining the temperature of molten iron entering a semi-steel smelting converter and a storage medium, which have the same advantages as the above method.

The invention discloses a self-corrosion type semi-steel desulfurization spray gun and application thereof, and belongs to the field of steel smelting. The self-corrosion type semi-steel desulfurization spray gun comprises a spray gun body and a refractory material layer arranged outside the spray gun body, the spray gun body comprises a spray gun inner pipe with two spray gun holes, the spray gun inner pipe is arranged in the spray gun body in the length direction of the spray gun body, one end of each spray gun hole is connected with the spray gun inner pipe, and the other end of each spray gun hole is connected with the refractory material layer. The connecting angle between each spray gun hole and the spray gun inner pipe is 90 degrees, the included angle between the two spray gun holes is 180 degrees, and the two spray gun holes are formed in the refractory material layer in the radial direction of the refractory material layer. The spray gun slag line part of the refractory material layer is formed by pouring aluminum oxide and carbon powder, and the mass ratio of the aluminum oxide is more than 80%. By designing the self-corrosion type refractory material and the like, a liquid product is slowly formed between the gun body and slag and falls off, slag adhesion is prevented, and therefore the service life of the gun body is prolonged.

The utility model provides a semisteel cable cutting device, and relates to the technical field of electrical cable cutting, the semisteel cable cutting device comprises a cutting device body and a semisteel cable body, the cutting device body comprises a mounting base, a power device, a cutting device and a locking device, the top of the mounting base is provided with a dial-up device and a power device, and the dial-up device and the power device are arranged on the mounting base. A cutting device is installed on the side edge of the power device, a locking device is installed on the inner side of the cutting device, the semi-steel cable body penetrates through the interior of the locking device, and a power shaft is inserted in the middle of the power device in a penetrating mode. According to the semi-steel cable cutting device, the adjusting position is kept unchanged through the tension springs on the two sides of the guide rail, the adjusting force is guaranteed through the adjusting screws, and the cutting process has higher accuracy and stability. And frequent manual scribing operation is not needed in the machining process, the cutting error is reduced, and the high-precision and long-time cutting operation requirements can be met.

The invention discloses a method for producing SWRH82B based on vanadium titano-magnetite, and relates to the technical field of steel wire manufacturing. According to the method, a composite blowing technology combining a porous vanadium extraction oxygen lance with bottom blowing inert gas is adopted, and real-time optimization of a coolant ratio is innovatively carried out; kR deep desulfurization, low-sulfur semisteel adding, refining slag alkalinity precise regulation and control and a dual-mode electromagnetic stirring process are combined, the core problems that in the process of smelting the SWRH82B steel through the vanadium titano-magnetite, component fluctuation is sensitive, the purity degree is difficult to control, and the homogeneity of a casting blank is poor are systematically solved, and the process stability and the product quality are remarkably improved.