34results about How to "Guarantee smooth production" patented technology

The invention provides a method for prolonging the service life of a bottom tank of an RH vacuum furnace. The method is characterized in that: the opposite side of an argon blowing system of a vacuum chamber is added with an argon blowing system, the position of a riser and the position of a downcomer are exchanged when a new varnished tube is mounted, and an argon tube of the riser is connected to the newly added argon blowing system. The method helps realize the alternate use of a circulation tube at the ascending side and a circulation tube at the descending side of the bottom tank by exchanging the position of the riser and the position of the downcomer, thus avoiding that the circulation tube at one side always bears the intense scouring of the raising steel flow, effectively prolonging the service life of the circulation tubes, and further prolonging the service life of the bottom tank. The method has obvious effect and can help improve the average service life of the bottom tank by more than one fold.

The invention discloses a titanium calcium aluminate castable for ladle or foundry ladle. The titanium calcium aluminate castable for ladle or foundry ladle comprises (by weight): 60-80% of titanium calcium aluminate, 10-25% of high alumina bauxite clinker, 2-6% of calcium aluminate cement, 2-8% of alumina micro-powder and 3-6% of silica micropowder. In the preparation, polypropylene fiber and a water reducer are added, wherein the polypropylene fiber accounts for 0.01-0.04% of total weight of the raw materials; and the water reducer accounts for 0.1-0.5% of weight of the raw materials. by adding the alumina micro-powder and silica micropowder, volume stability of the ladle or foundry ladle can be maintained at the use temperature, and damage degree and potential safety hazard of the product are effectively reduced. By using calcium aluminate cement and silica micropowder as a compound binder, the product has good workability and medium and high temperature strength, service life is long, repair frequency is reduced, and smooth production of ladle is guaranteed. By using titanium calcium aluminate in quantity, volume stability of the titanium calcium aluminate castable at medium and high temperature is good, and the strength is high.

The invention relates to a method for repairing a converter lining, in particular to a method for repairing a converter lining through pig iron and slag. According to the technical scheme, the method for repairing the converter lining through the pig iron and the slag comprises the following steps that after the pig iron is added into a converter, the slag is quickly condensed on a converter lining part needing to be shimmed, and the slag is made to be repeatedly condensed on the converter lining part needing to be shimmed in the process of shaking the converter through the adhesion performance of the pig iron and the slag. By means of the method for repairing the converter lining through the pig iron and the slag, the consumption of the materials for repairing the converter is remarkably reduced, the refractory cost is reduced, and good economic benefits are achieved; and moreover, the time for repairing the converter can be saved, controlling of production rhythm is facilitated, and the productivity is further improved.

The invention discloses a pinch roll interlock protection control method which comprises the following steps: Step 1, running pinch roll action under the automatic or manual mode; Step 2, judging whether finishing mill throws steel, if yes, moving to Step 3; otherwise, moving to Step 4; Step 3, carrying out the quick-opening process of cleaning between rolls; and Step 4, carrying out the lifting process of cleaning between rolls. According to the pinch roll interlock protection control method, under the conditions that the production technology is met and equipment safety is ensured, other detecting equipment of a rolling line area is introduced, and novel interlock protection logic is designed at the same time, so that the risk that a pinch roll is collided is effectively eliminated, and smooth production of a rolling line is ensured.

The invention relates to a preparation method of a hot rolled steel coil used for an oil and gas pipeline. The preparation method comprises the following steps of: (1) after designing components, desulphurizing molten iron, then smelting in a converter, switching from nitrogen to argon, then carrying out deep desulfurization and calcium treatment in a ladle furnace, and tapping to obtain molten steel; (2) continuously casting the molten steel to obtain a slab, afterwards heating the obtained slab, then carrying out rough rolling and finish rolling on the slab after dephosphorization by using high-pressure water, and finally winding to obtain the hot rolled steel coil. The preparation method provided by the invention can be used for reducing surface cracks of the slab, improving the one-time qualified rate of the slab, realizing the direct and hot charging rolling of the slab, raising the hot delivery rate of direct charging, saving energy and reducing emission; through reasonable optimization and control of hot rolling process parameters, the water is used for replacing metals, so that the production cost is reduced.

The invention provides a charging pretreatment method of a high-carbon high-alloy continuous casting billet. The charging pretreatment method comprises the following steps that A) stacking and slow cooling are carried out on the high-carbon high-alloy continuous casting billet; and B) the stacked and slowly cooled high-carbon high-alloy continuous casting billet is preheated. The invention furtherprovides a cold charging heating method of the high-carbon high-alloy continuous casting billet, namely, the high-carbon high-alloy continuous casting billet subjected to charging pretreatment is subjected to cold charging heating. By optimizing the casting billet offline slow cooling and cold charging heating process system, the corner structure form of the casting billet is changed, the formation of corner brittle structures and oxidation decarburization layers is inhibited, and the problem of cold charging fracture of a high-carbon high-alloy steel casting billet is effectively solved, sothat the smooth production of high-carbon high-alloy steel is ensured, and the rejection rate is reduced.

The invention discloses a jacking method of a rack of double-sided shears. The jacking method comprises the following steps of (1) determining the full load weight and the unbalanced centre-of-gravity position of the rack under the condition that components on the rack are not dismantled; (2) determining jacking devices for jacking the rack; (3) manufacturing a jacking tool and assisting contour blocks; (4) placing a sufficient number of jacking devices at the reasonable jacking positions in a jacking area of the double-sided shears; and (5) progressively increasing the height of the rack with the aid of the assisting high-equivalent blocks so as to jack the rack to the required height during the repeated station switching jacking of all the jacking devices, on the contrary, progressively reducing the height of the rack with the aid of the assisting high-equivalent blocks to complete falling and resetting of the rack during the repeated station switching jacking of all the jacking devices. According to the jacking method, rack jacking is completed reasonably and safely under the condition that components on the rack are not required to be dismantled, so that not only is the working intensity of maintainers reduced, but also the maintaining efficiency is improved, and smooth production is ensured.

Based on the total weight of the crystallizer casting powder, the crystallizer casting powder is prepared from the following components in percentage by weight: 36.5 to 44.5 percent of CaO, 20.5 to 26.5 percent of SiO2, 3 to 9 percent of BaO, 0.5 to 1.5 percent of Li2O, 5 to 8 percent of Na2O, 10 to 12 percent of F, 3 to 5 percent of Al2O3, 2 to 4 percent of MgO, 0 to 1.5 percent of Fe2O3, 8 to 10 percent of C and the balance of inevitable impurities. The content of different components is controlled to play a synergistic role, so that the crystallizer casting powder has the properties of high alkalinity, low melting point, moderate viscosity, low transition temperature, high crystallization temperature and high crystallization proportion, and the crystallizer casting powder is ensured to have good lubrication and heat transfer functions in the high-pulling-speed continuous casting process; the continuous casting process is smooth; and the surface quality of a casting blank is improved.

A method for eliminating casting blank corner transverse cracks under a high-scrap-ratio production mode comprises the following steps that a, scrap steel classified preparation is conducted; b, control over scrap steel adding in the converter smelting process is conducted, specifically, the relation of Cueq<=0.15% serves as a scrap steel adding principle; c, heat-carrying materials are added in the converter smelting process, specifically, according to the temperature and component of molten iron and the adding quantity of scrap steel, the adding quantity of the heat-carrying materials is determined; and d, control of the N content in the converter smelting process is conduced, specifically, good-quality white ash is adopted for slagging materials, and the content of N in the steel is conducted to be smaller than or equal to 50 ppm. According to the method for eliminating the casting blank corner transverse cracks under the high-scrap-ratio production mode, quantum chemistry calculation of the influence of the content of elements such as Cu, Ni, As and N in the scrap steel on the casting blank corner quality is obtained according to long-term exploration and repeated tests, the adding quantity and types of the scrap steel are controlled in a refined mode, and the adverse factor of the high microelement content on the casting blank quality is eliminated; through titanium nitrogen fixation, steel hardening caused by the high N content is prevented; and the casting blank corner cracks can be effectively controlled under the condition of the converter large-scrap-ratio production mode.

The invention discloses a smelting method for improving the fluidity of molten steel after refining and desulfurization of rebar. The refining and desulfurization process of rebar comprises: converter smelting - post-furnace and argon station treatment - LF refining - continuous casting. The LF refining process includes: refining and sending The slag-forming material lime is added before electricity, and fluorite is added at the same time to adjust the fluidity of the slag and control the alkalinity of the refining slag to meet the standard requirements. During the power transmission process, diffusion and deoxidation are carried out. After the slag is completely melted, the power is cut off. The desulfurization efficiency meets the standard requirements; particle steel is added to increase the oxygen content in the molten steel, and the fluidity of the molten steel is improved; the components of the molten steel are adjusted to ensure that the components of the molten steel meet the standard requirements, and the temperature is qualified for continuous casting; the technical scheme provided by the present invention , After the sulfur content in the molten steel through the refining process reaches the standard requirements, an appropriate amount of high-quality particle steel of oxidizing material is added to improve the fluidity of the molten steel, avoid the clogging of the pouring nozzle, and make the continuous casting process flow smoothly.

The invention discloses a crawler belt discharged ore suction-out and suction dry type magnetic separator and a sorting method thereof. The crawler belt discharged ore suction-out and suction dry typemagnetic separator comprises a suction-out type magnetic separator, a suction type magnetic separator, a suction-out type magnetic separator concentrate chute and a material receiving groove. The suction-out type magnetic separator is arranged above the suction type magnetic separator, the suction-out type magnetic separator and the suction type magnetic separator are mutually crossed and vertically arranged, and the suction-out type magnetic separator concentrate chute is formed in the bottom of the suction type magnetic separator and arranged in the suction-out type magnetic separator advancing direction and in the side, stretching out of the suction type magnetic separator, of a crawler belt. The suction-out type magnetic separator concentrate chute is connected with a magnetic productgroove of the material receiving groove. The material receiving groove is formed in the bottom of a suction type magnetic separator magnetic sliding wheel. In the production process, an updraught magnetic separator is forced to discharge ore, the problem about material blockage can be solved, the pulverized product dry type primary selection effect is improved, a large amount of qualified waste stone is thrown out, the grinding and separation feeding amount is reduced, and energy saving, consumption reducing and efficient utilization of magnet ore can be achieved.

The invention discloses a production line for producing vanadium-nitrogen alloy billets. The production line comprises a raw material supply system, a metering and burdening system, a material mixing system and a billet forming system which are sequentially connected, wherein the raw material supply system comprises a vanadium oxide powder supply unit and a reducing agent supply unit, the vanadium oxide powder supply unit and the reducing agent supply unit are respectively connected with the metering and burdening system to convey vanadium oxide powder and a reducing agent, which are in line with requirements, into the metering and burdening system, the metering and burdening system is used for weighing the vanadium oxide powder and the reducing agent and conveying the well weighed vanadium oxide powder and the well weighed reducing agent into the material mixing system, the material mixing system is used for mixing the vanadium oxide powder and the reducing agent, preparing billet powder and further conveying the billet powder into the billet forming system, and the billet forming system is used for manufacturing the billets from the billet powder.

The invention relates to a treatment method for scale, in particular to a treatment method for scale on the surface of vanadium production equipment and belongs to the field of metallurgy. The treatment method for the scale on the surface of the vanadium production equipment comprises the following steps that firstly, measuring is conducted; secondly, calculating is conducted, wherein the dosage of an anti-scaling agent is calculated according to the formula that the thickness of a scale layer times the inner surface area of the equipment is equal to 200 kg / m<3> to 250 kg / m<3>; thirdly, the scale is removed; fourthly, cleaning is conducted; and fifthly, waste liquid is recycled. According to the treatment method for the scale on the surface of the vanadium production equipment, the scale problem of the equipment under the calcified roasting-acid pickling vanadium liquid technology is effectively solved, it is ensured that production is smoothly conducted, and the production efficiency is improved.

The present invention relates to a parallel debugging data acquisition method of hot-rolled strip steel MES system, which builds servers and application systems of hot-rolled new and old MES systems, collects production data required for debugging in real time, and realizes new and old MES in the process of system upgrading and transformation. The system runs in parallel, which not only ensures the normal on-site production, but also transmits the online data in the production process to the offline new third-level MES system in real time, and sends it to the offline new second-level PCS system, which is used as debugging data to simulate production and offline debugging The system is synchronized with production. The advantage is: through the implementation of the debugging data collection method, on the one hand, the online production and development and debugging of the hot rolling 1780 production line are realized in parallel, and the important production data of PDI required for debugging are provided for the second and third new systems in real time and accurately, which greatly improves Improve the work efficiency of system debugging and ensure that the project duration and quality meet the expected standards.

The invention discloses a jacking method of a rack of double-sided shears. The jacking method comprises the following steps of (1) determining the full load weight and the unbalanced centre-of-gravity position of the rack under the condition that components on the rack are not dismantled; (2) determining jacking devices for jacking the rack; (3) manufacturing a jacking tool and assisting contour blocks; (4) placing a sufficient number of jacking devices at the reasonable jacking positions in a jacking area of the double-sided shears; and (5) progressively increasing the height of the rack with the aid of the assisting high-equivalent blocks so as to jack the rack to the required height during the repeated station switching jacking of all the jacking devices, on the contrary, progressively reducing the height of the rack with the aid of the assisting high-equivalent blocks to complete falling and resetting of the rack during the repeated station switching jacking of all the jacking devices. According to the jacking method, rack jacking is completed reasonably and safely under the condition that components on the rack are not required to be dismantled, so that not only is the working intensity of maintainers reduced, but also the maintaining efficiency is improved, and smooth production is ensured.

The invention discloses a casting powder baking device for continuous casting. The casting powder baking device for continuous casting comprises a high-pressure vortex fan arranged above a tundish, wherein an air outlet of the high-pressure vortex fan is connected with an air pipe, and an adjusting valve is arranged on the air pipe. The casting powder baking device for continuous casting further comprises a fluidization box, fluidization particles; filter cloth and an air chamber are sequentially arranged in the fluidization box from top to bottom; the top of the fluidization box is open; andthe end, away from the air outlet, of the air pipe communicates with the air chamber. According to the casting powder baking device for continuous casting, the local overburning hidden danger is eliminated, the baking uniformity is improved, the heat transfer efficiency is improved, the bonding steel leakage accidents are reduced, smooth production is guaranteed, and the casting blank quality is further improved.

The invention discloses a formula and a manufacturing method of a slag ladle trunnion anti-sticking steel sheath, which relate to the technical field of casting residue treatment. According to the formula of the slag ladle trunnion anti-sticking steel sheath, the formula comprises 60-90% of slag, 5-30% of lime, 5-10% of a binder and the balance of a refractory material, and the refractory material is a mixture formed by mixing CaO and Al2O3 according to the proportion of 3: 1-6: 1. According to the formula and the manufacturing method of the slag ladle trunnion anti-sticking steel sheath, the matched trunnion sheath is manufactured, the sheath is placed at the position of the trunnion when the slag ladle receives slag steel, and the sheath is taken down when the slag ladle is hoisted. The formula effectively prevents slag steel from being adhered to the trunnion when the steel ladle is turned over casting residues, so that the lifting of the slag ladle is prevented from being influenced, the casting residue slag steel in the steel ladle is effectively prevented from being adhered to form a weight at the trunnion in the pouring process, so that the phenomenon that a slag ladle lifting appliance cannot be completely clamped into the trunnion for lifting the slag ladle is prevented, smooth production is ensured, and the hidden danger of pouring the slag ladle caused by the weight of the slag steel adhered to the trunnion of the ladle is reduced.

The invention relates to a method for reclaiming coal gas of a converter through guidance of a mathematical model, which belongs to the technical field of metallurgical steelmaking and is used for solving the problem that caloric value of the coal gas of the converter can only be detected by a testing method. The method adopts the following technical scheme that: a mathematical model of the CO content which is reclaimed at the beginning and is refused to be reclaimed by the converter coal gas and the caloric value and the reclaiming amount of the converter coal gas is established; and a computational formula of the caloric value and the reclaiming amount of the converter coal gas is given out; and the computational formula of the coal gas caloric value Y1 is as follows: Y1=842.28e<1.8246>X, and X is more than or equal to 25 percent and less than or equal to 75 percent. According to field detection data, the mathematical model of the CO content which is reclaimed and is refused to be reclaimed by the converter coal gas and the caloric value and the reclaiming amount of the converter coal gas is established, and the computational formula is formed. By adopting the computational formula, according to the field practical situation the value of the CO content which is reclaimed and refused to be reclaimed by the converter coal gas can be adjusted and the caloric value and the reclaiming amount of the converter coal gas can be rapidly calculated, so that the reclaiming amount of the coal gas is improved and the method is favorable for a converter coal gas user to perform smooth production.

The invention discloses a pinch roll interlock protection control method which comprises the following steps: Step 1, running pinch roll action under the automatic or manual mode; Step 2, judging whether finishing mill throws steel, if yes, moving to Step 3; otherwise, moving to Step 4; Step 3, carrying out the quick-opening process of cleaning between rolls; and Step 4, carrying out the lifting process of cleaning between rolls. According to the pinch roll interlock protection control method, under the conditions that the production technology is met and equipment safety is ensured, other detecting equipment of a rolling line area is introduced, and novel interlock protection logic is designed at the same time, so that the risk that a pinch roll is collided is effectively eliminated, and smooth production of a rolling line is ensured.

The present invention discloses a method for preventing collision of a pre-straightening steel plate and subsequent equipment, and a steel plate head warping detection apparatus. The method comprises: detecting the head warping height of the steel plate when outputting a pre-straightening machine on the head portion of the steel plate, and if the head warping height is larger than the alarm threshold, starting the roller seam rapid-opening protection of the pre-straightening machine. According to the present invention, the method uses the multiple protection mechanisms to carry out abnormal protection on the pre-straightening process; and with the apparatus, the steel plate head warping condition output by the equipment and meeting the alarming condition can be alarmed, such that the collision of the pre-straightening steel plate and the subsequent equipment can be effectively prevented so as to ensure safe production.

The invention provides a pretreatment of high-carbon and high-alloy continuous casting slabs, which comprises the following steps: A) stacking and slowly cooling the high-carbon and high-alloy continuous casting slabs; B) stacking and slowly cooling the high-carbon The high-alloy continuous casting slab is preheated; the application also provides a method for cold charging and heating of the high-carbon and high-alloy continuous casting slab, that is, the high-carbon and high-alloy continuous casting slab that has undergone the above-mentioned pre-treatment for furnace charging is subjected to cold charging and heating. In this application, by optimizing the slow cooling and cold charging heating process system of the billet off-line, the microstructure of the corners of the billet has been changed, the formation of brittle structures and oxidized decarburization layers at the corners has been suppressed, and the problem of high carbon and high alloy steel has been effectively solved. The difficult problem of cold-loading and fracture of cast slabs ensures the smooth production of high-carbon and high-alloy steels and reduces the rejection rate.