44results about How to "Improve smelting performance" patented technology

The invention relates to a method for utilizing iron containing metallurgical dust, which comprises that: steel-making sludge, metallurgical dust-removing powder and iron scale are mixed; the mixed raw materials are sent into a rotary kiln and dried, and the drying temperature is determined according to moisture content of the raw materials and controlled to be between 300 and 500 DEG C; the dried materials are cooled by a cooler, the cooled materials are added with 5 to 10 percent of caking agent by weight, and the material and the caking agent are fully stirred evenly by a wheel-rolling mixer; and finally, the mixture is pressed into cooled agglomerated pellet products by a twin-roller machine, the pressure of the twin-roller machine is more than or equal to 500 Kg/cm<2>, and the cooled agglomerated pellet products are prepared into finished products after separation by a vibration sieve. The method has the advantages of low production energy consumption, high product strength, low moisture content and good quality, and can realize full effective utilization of resources; and the finished products of cooled agglomerated pellets can be directly used as a cooling agent and a slag former in steel making, can improve smelting effect and achieve functions of cooling and slag forming, and can be also used for blast furnace process.

A method for using electric arc to excite ultrasonic wave includes such steps as electrically isolating alternating signals for guaranteeing safety of circuit, electrically isolating the are exciting signal of electrode for preventing signal interference, coupling the ultrasonic signals with arc exciting signals to obtain arc-ultrasonic exciting signals, and exciting electric arc for arc welding or smelting while modulating the electric arc by the said alternating signals in electric arc to excite ultrasonic waves, so improving the welding effect.

The invention provides a cobalt-based high-temperature alloy wire which is prepared from the following chemical components in percent by mass: 0.06-0.12% of C, less than or equal to 0.3% of Si, 1-1.8%of Mn, less than or equal to 0.015% of P, less than or equal to 0.015% of S, 19.2-20% of Cr, 9.5-10.5% of Ni, 14.2-15.5% of W, less than or equal to 2.8% of Fe, less than or equal to 0.4% of other impurities and the balance Co. By adding 19.2-20% of Cr, the cobalt-based high-temperature alloy wire has excellent corrosion resistance, and a condition that high-temperature strength is decreased as aresult of a double phase area as the content of Cr is too high to promote generation of an epsilon-Co phase and a sigma phase is avoided. Elements such as massive Co, 14.2-15.5% of W and 19.2-20% ofCr and the like in the cobalt-based alloy can reduce stacking fault energy, so that the high-temperature strength of the alloy is improved. The content of W is controlled at 19.2-20%, so that it is ensured that a condition of prominent work hardening of the alloy, difficulty in cold processing and poor stability as the too high W content is avoided. As the cobalt-based high-temperature alloy wirecontains 9.5-10.5% of Ni, the tissue stability of the alloy is improved favorably, and precipitation of a Co7W6 phase is reduced. By adding 1.1-1.8% of Mn, the oxidation resistance of a Ni-Cr alloy isimproved effectively.

The invention discloses a crushing smelter with a better smelting effect. The crushing smelter comprises a smelter body, discharging holes are formed in the obverse side of the smelter body, and burning cavities are formed in the two sides of the smelter body. Burning devices are connected to the outer sides of the burning cavities, a discharging cavity is connected to the top of the smelter body, and a crushing cavity is connected to the top of the discharging cavity. A crushing idler wheel is arranged in an inner cavity body of the crushing cavity and connected with a rotary motor arranged outside the crushing cavity through a wheel shaft, a feeding cavity is connected to the top of the crushing cavity, and a left feeding pipe and a right feeding pipe which are connected with the top of the crushing cavity are installed on an inner cavity of the feeding cavity in a staggered mode. The crushing smelter with the better smelting effect is provided with the crushing cavity and the crushing idler wheel on the whole so that input large metal waste materials can be crushed and pressed, and the large metal waste materials are changed into small metal waste materials, so that smelting operation is convenient to conduct, and the metal waste materials are quickly and conveniently smelted.

The invention discloses a bottom blowing or side blowing metallurgical furnace for treating scrap copper, which comprises bearings, a horizontal cylindrical furnace body, bottom blowing or side blowing spray guns, a burner and a driving part, wherein the horizontal cylindrical furnace body can be supported on the bearings in a 360-degree rotation manner; feed ports, a copper outlet and a slag hole are formed in the side face of the horizontal cylindrical furnace body, respectively; the horizontal cylindrical furnace body is provided with a smoke outlet and a nozzle port; and reductant-oxidant injection ports and air bricks are formed and arranged at the bottom or the side part of the horizontal cylindrical furnace body. The bottom blowing or side blowing spray guns are used for injecting oxygen-containing gas and natural gas, oil or powdered coal into the horizontal cylindrical furnace body, and inserted into the reductant-oxidant injection ports. A burner is mounted at the nozzle port. The driving part is connected with the horizontal cylindrical furnace body to drive the horizontal cylindrical furnace body to rotate. The bottom blowing or side blowing metallurgical furnace for treating the scrap copper is simple in structure, good in environmental protection property and high in heat efficiency.

The invention discloses a nonferrous metal oxygen side-blown molten pool smelting furnace and relates to extraction of a nonferrous metal. The invention provides a nonferrous metal oxygen side-blown molten pool smelting furnace applicable to smelting of copper, nickel and other nonferrous metal minerals. The technical proposal of the invention is that a nonferrous metal oxygen side-blown molten pool smelting furnace includes a furnace crucible, a water jacket, a feed opening, a smoke vent and an air opening; one furnace bottom is high and the other is low; an inclined surface is arranged between the high and the low furnace bottoms; a partition wall is arranged in a siphon well out of the wall on the front end of the furnace for separating the siphon well into a slag siphon well and a metal siphon well; a channel is arranged between the partition wall and the furnace bottoms for communicating the two siphon wells; the upper end of the slag siphon well is provided with a slag tap; the upper end of the metal siphon well is provided with a metal liquid discharge opening. The invention is used for smelting the nonferrous metal.

The invention discloses metal electroslag remelting and smelting equipment comprising a crystallizer and an upright post, wherein the whole crystallizer is furnace-shaped and is located in a crystallizer mounting groove; and the upright post is located at one side of the crystallizer mounting groove, a horizontal cantilever is arranged above the upright post and is provided with an electrode dead against the crystallizer by virtue of an electrode holder, and the electrode downwards extends to enter the crystallizer. The metal electroslag remelting and smelting equipment is characterized by also comprising an automatic auxiliary material feeding device located at the side of the crystallizer, wherein the automatic auxiliary material feeding device comprises a discharging part structure and a power control part structure. The metal electroslag remelting and smelting equipment has the advantages that the structure is simple, auxiliary materials can be automatically fed during smelting, the auxiliary material feeding control process is stable and reliable, and the smelting effect is good.

The invention provides a quick lime hydrator, which belongs to the technical field of slaked lime preparation equipment. In order to solve the problem of mixing nonuniformity caused by inappropriate mixing ratio of quick lime and water in an existing quick lime hydrator, the hydrator comprises a stock bin for placing the quick lime, a metering screw conveyer for conveying the quick lime and accomplishing metering work, a metering water pump connected with an external water source, a primary spiral stirrer and a secondary spiral stirrer for mixing the quick lime and the water, and a dust collection device for absorbing dust and water vapor generated during hydration reaction of the quick lime and the water, wherein the metering screw conveyer is communicated with the stock bin; the primary spiral stirrer and the secondary spiral stirrer are arranged up and down in parallel; the primary spiral stirrer is respectively communicated with the metering screw conveyer and the secondary spiral stirrer; the water spray end of the metering water pump stretches into the primary spiral stirrer and relatively gets close to the metering screw conveyer; the metering water pump starts to spray water when the quick lime enters the primary spiral stirrer; the dust collection device is communicated with the primary spiral stirrer.

The invention provides a high-grade vanadium-titanium pellet. The high-grade vanadium-titanium pellet is prepared from a high-grade vanadium-titanium-iron concentrate, steel slag powder, fly ash and bentonite. The invention further provides a preparation method of the high-grade vanadium-titanium pellet. According to the high-grade vanadium-titanium pellet, iron and carbon in iron-making fly ash and iron, CaO and V2O5 in steelmaking steel slag are utilized, reasonable utilization of secondary resources is achieved, a positive effect is achieved on reduction of an iron-making production cost, and actual production results show that the vanadium-titanium pellet contains 57%-60% of TFe, 8%-12% of TiO2 and 0.6%-0.9% of V2O5, and a roasted pellet compressive strength reaches 2,000-2,500 N/pellet.

The invention provides a system for tracking data in a blast furnace. The system includes an acquisition module suitable for acquiring furnace burden data to be tracked in a database in a blast furnace control system; a processing module suitable for calculating burden batch position and burden layer thickness according to charging parameter sub information and system parameter information so as to generate a burden batch position information mirror image in the blast furnace, and calculating time for burden batch to arrive at a tuyere in the blast furnace so as to generate a core parameter tendency chart according to the time for the burden batch to arrive at the tuyere in the blast furnace and core parameter sub information; and a display module suitable for displaying correlated information of the burden batch position information, the core parameter tendency chart and burden batch parameter information when searching content is one or a plurality of kinds of information selected from the burden batch position information, the core parameter tendency chart and burden batch parameter information. According to the system, the furnace burden data in the blast furnace is tracked; the mirror image is generated according to the furnace burden data; the burden batch position information, the core parameter tendency chart and burden batch parameter information are correlated to each other; and when the data in the blast furnace are searched or observed, combination display can be realized, and the efficiency of real-time tracking and observation of the furnace burden data can be improved.

The invention discloses an automatic feeding device for auxiliary materials for electroslag smelting. The automatic feeding device is characterized by comprising a discharging part structure and a power control part structure, wherein the discharging part structure comprises a rack arranged at the side of a crystallizer, the upper end of the rack is provided with a pair of belt pulleys along the horizontal direction, the belt pulleys are annularly sleeved by a conveying belt, one end of the conveying belt is located above the crystallizer, and the other end of the conveying belt is far away from the crystallizer; and the power control part structure comprises a horizontal cantilever lifting mechanism and a linkage control mechanism, wherein the linkage control mechanism is connected between a horizontal cantilever and the discharging part structure and is used for realizing linkage control on the discharge of the discharging part structure by virtue of the lifting of the horizontal cantilever. The automatic feeding device has the advantages that the structure is simple, the auxiliary materials can be automatically fed during smelting, the auxiliary material feeding control process is stable and reliable, and the smelting effect is good.

The invention provides a top-blowing powder spraying method for electric furnace smelting. The method comprises the following steps that air powder is blown into a furnace by adopting one or more thantwo top-blowing powder spraying systems which are uniformly distributed on a furnace cover; one or more than two top-blowing powder spraying systems can be controlled independently or in a linkage manner; and when any top-blowing powder spraying system is controlled, the method can drive a lifting mechanism through a driving unit in any top-blowing powder spraying system so as to drive a spiral spraying pipe of a lifting spiral spraying gun to rotate and lift, and therefore air powder is sprayed into the furnace at a constant spiral lift angle, wherein the system comprises a liftable spiral spray gun, a lifting mechanism, a driving unit, a stretchable rotary joint and a gas powder supply device. According to the method, multi-point powder spraying can be achieved, each top-blowing powderspraying system can operate independently and can also operate in a linkage mode, and the smelting effect of the electric furnace can be improved; the blowing angle can be kept unchanged for a long time; and the equipment is light in weight and low in furnace top mounting height limit requirement.

The invention relates to the technical field of oriented silicon steel, and discloses an atmosphere control process of high-magnetic-induction oriented silicon steel with excellent magnetism. The atmosphere control process comprises the following steps of 1, smelting, specifically, smelting in a converter and RH refining to obtain molten steel, introducing air in the smelting process, and setting the total air inflow to be 100-300Nl/min and the oxygen content in the introduced air to be 20-21%. According to the atmosphere control process of the high-magnetic-induction oriented silicon steel with the excellent magnetism, the content of oxygen and the content of nitrogen in a certain proportion are added in different processes, the atmosphere control precision of each stage is effectively improved, therefore the obtained final high-magnetic-induction oriented silicon steel is excellent, the influence of air pressure, flow and other factors on the magnetic effect of the final high-magnetic-induction oriented silicon steel is avoided, the FeO content in the slag is reduced, the steel recovery rate is increased, the service life of a furnace lining is prolonged, the effect of reducing the production cost is achieved, accurate atmosphere control is conducted, the smelting effect is better in the smelting process of the high-magnetic-induction oriented silicon steel, and the magnetism of the smelted high-magnetic-induction oriented silicon steel is more excellent.

The invention relates to an MgO optimal distribution method for iron-containing furnace charge of a blast furnace. The method comprises the following steps: S1, determining that the MgO content SMg' of optimized sintered ore is less than or equal to 1.8% and the binary alkalinity (CaO/SiO2) Sb' is greater than or equal to 1.8; S2, determining that the MgO content of optimized pellets is 1.5%-2.0%and the binary alkalinity is less than or equal to 0.4, namely, PMg' is greater than or equal to 1.5% and less than or equal to 2.0%, Pb' is less than or equal to 0.4, and the charging proportion Pp'is less than or equal to 30%; S3, according to the binary alkalinity requirement Bb of the blast furnace comprehensive furnace charge and the binary alkalinity constraint condition of each iron-containing furnace charge, determining the charging proportion Pp' of the optimized pellets; S4, determining the MgO content PMg' of optimized pellets and the MgO content SMg' of optimized sintered ore according to the MgO content requirement BMg of blast furnace comprehensive furnace charge, the optimized iron-containing furnace charge proportions and the optimized iron-containing furnace charge MgO constraint conditions. The method has the advantages that the reduction degree of the comprehensive furnace charge is effectively improved, the soft melting temperature is reduced, the interval is narrowed, and the smelting performance is improved.

The invention relates to the field of metallurgy, and particularly discloses a smelting method. A smelting furnace which can carry out smelting quickly is used for conducting smelting. The smelting furnace comprises a rack, a cutting mechanism and a smelting mechanism. The cutting mechanism comprises a cutter, a cutting motor and an outer cylinder, wherein the cutting motor can drive the cutter torotate. The smelting mechanism comprises a smelting furnace body, a stepping motor and a burning cylinder, wherein the burning cylinder is located on the periphery of the smelting furnace body, and the stepping motor can drive the smelting furnace body to rotate. The smelting furnace body is fixedly provided with a collection tank, the smelting furnace body is internally and fixedly provided witha slag blocking ring, the middle portion of the slag blocking ring protrudes towards the center of the smelting furnace body, and the lower portion of the smelting furnace body is provided with a slag outlet. The smelting method comprises the first step of material mixing, the second step of pre-heating, the third step of smelting, the fourth step of discharging and the fifth step of cleaning. Bymeans of the scheme, metal in ores can be rapidly reduced.

The invention discloses a method for producing ore briquettes from fine ores with pitch as an adhesive. The method comprises the following steps: 1) preparing raw ore briquettes from the fine ores as the raw material and by taking the pitch as the adhesive; 2) drying and dehydrating the raw ore briquettes; 3) orderly performing primary dehydrogenation and secondary dehydrogenation on the dried and hydrated raw ore briquettes, wherein the primary dehydrogenation is performed in a strong oxidative medium, while the secondary dehydrogenation is performed in a weakly oxidative or neutral medium; and 4) performing carbonization consolidation on the ore briquettes after the treatment in the step 3), and slowly cooling the ore briquettes obtained after carbonization consolidation in a sealed furnace until the temperature is below 300 DEG C, thereby obtaining the finished product ore briquettes. The ore briquettes prepared by use of the process can be applied to blast furnace smelting, electric arc smelting, vertical furnace smelting, rotary kiln smelting and bottom converter smelting. According to the method, due to the primary dehydrogenation, the secondary dehydrogenation and the carbonization consolidation in the process, the prepared ore briquettes are thoroughly dehydrogenated without oxidation; and the finished briquettes contain no tar and other toxic and harmful compounds, and are safe and environment-friendly.