1415results about "Vertical furnaces" patented technology

The invention relates to the technical field of communication control, in particular to a communication control system and method for a shaft furnace feeding device, and the system comprises a feeding end which is composed of a raw material characteristic sensing layer, a feeding state sensing layer and a control response layer, the feeding state sensing layer is used for collecting data of the feeding state, the raw material characteristic sensing layer and the feeding state sensing layer both support multi-mode data collection, and the control response layer supports high-frequency control instruction response and controls the feeding state of raw materials; the system can actively adjust a feeding strategy under a dynamic working condition, reduce raw material waste and energy consumption and improve product quality; the self-learning capability continuously optimizes the control effect along with the prolonging of the operation time, a forward feedback cycle is formed, and the production efficiency and the equipment utilization rate are greatly improved.

A method for producing molten iron in at least one blast furnace (1) comprising at least two levels of gas injection (3A, 3B) and releasing a blast furnace top gas (10) during operation, the method comprising at least the steps of: charging the blast furnace with an iron-containing charge (4) and a first carbon-based reductant (5), injecting at the first level (3A) hot blast (11) having a temperature of at least 1000° C., said hot blast containing oxygen (6), recovering the blast furnace top gas and extracting hydrogen to produce a H2-rich stream (13) containing more than 90%v of hydrogen and a H2-lean stream (12), injecting the H2-rich stream (11) into the blast furnace at the second level (3B) of gas injection. Related network of plants.

The invention relates to the technical field of vertical furnaces, in particular to a wafer loading and unloading chamber and a vertical furnace, which comprise a wafer boat, a filter, a heat exchanger, a return pipe, a fan and a heat energy absorption part, and in the process that the wafer descends into the wafer loading and unloading chamber along with the wafer boat, the low-temperature nitrogen flows out from the nitrogen outflow hole of the filter and flows to the wafer boat and the wafer. And carrying out cooling treatment on the wafer boat and the wafer by means of low-temperature nitrogen. And then the high-temperature nitrogen flows into the heat exchanger through the nitrogen recovery hole for cooling treatment. And the cooled nitrogen flows to the filter again through the return pipe under the action of the fan to be reused. By additionally arranging the heat energy absorption part, the heat energy absorption part can quickly absorb heat energy from the wafer boat, the wafer and the environment in the wafer loading and unloading chamber, so that the cooling rate of the wafer boat and the wafer is improved, the rising amplitude of the environment temperature in the wafer loading and unloading chamber is reduced, and the service life of other equipment in the wafer loading and unloading chamber is prolonged; and potential safety hazards are reduced.

The invention relates to the technical field of blast furnace smelting, and discloses a method, device and equipment for determining the position of a blast furnace soft melting zone and a storage medium, and the method comprises the following steps: carrying out charge level scanning based on a material distribution starting signal and a material distribution ending signal of current material distribution to obtain a charge level coordinate and a charge discharging speed; determining a first boundary condition based on the furnace charge level coordinates and the blast furnace characteristics, and constructing an initial grid structure; the initial grid structure is updated based on the furnace charge level coordinates and the furnace charge discharging speed, and a target grid structure is obtained; enabling the blast furnace burden to react, obtaining the distribution condition of each grid unit in the target grid structure under the condition that a plurality of burden performance parameters of each grid node in the target grid structure converge, and generating a temperature field distribution diagram; and determining the position of the soft melting zone of the blast furnace based on the plurality of furnace charge performance parameters and the temperature field distribution diagram corresponding to each grid node in the target grid structure. According to the method, the accuracy of determining the position of the soft melting zone is improved, and dynamic changes in the blast furnace are reflected.

The invention relates to the technical field of magnesite block light burning, and discloses an efficient and energy-saving magnesite block porous light burning annular kiln which comprises a vertical feeding cylinder, the vertical feeding cylinder is installed in the center area of the top of a kiln body, and smoke exhaust holes communicated with the outside space are formed in the circumferential face, close to the top of the kiln body, of the kiln body. An annular section composed of an inner side fire-resistant lining and an outer side fire-resistant lining is formed in the vertical feeding cylinder, and a plurality of annular array type internal combustion chambers are arranged in the kiln body and located in the annular section. The efficient and energy-saving magnesite block porous light burning annular kiln is a vertical circular kiln, magnesite with the particle size being 30-100 mm serves as raw materials, the cross section of the magnesite block porous light burning annular kiln is annular, a plurality of internal combustion chambers are arranged in a light burning zone, a plurality of coolers are arranged in a cooling zone, heat is evenly supplied to the internal combustion chambers, finished products are evenly cooled by the coolers, the light burning temperature of the materials is even, and the temperature of combustion-supporting air is high; the product quality is improved, and the fuel consumption is reduced.

Systems and methods for using a liquid hot metal processing unit to produce granulated metallic units (GMUs) are disclosed herein. In some embodiments of the present technology, a liquid hot metal processing system for producing GMUs comprises a liquid hot metal processing unit including a granulator unit. The granulator unit can include a tilter positioned to receive and tilt a ladle, a controller operably coupled to the tilter to control tilting of the ladle, a tundish positioned to receive the molten metallics from the ladle, and a reactor positioned to receive the molten metallics from the tundish. The reactor can be configured to cool the molten metallics to form granulated metallic units (GMUs).

The invention provides a metallurgical chemical solid waste pretreatment vertical electric heating roasting furnace device and a using method thereof.The furnace body is of a hollow cylindrical vertical structure, a barrel is divided into a solid reduction area, an oxidation reduction area and a furnace charge preheating area, the barrel of the solid reduction area and the barrel of the oxidation reduction area are surrounded by flat rectangular red copper pipes, and an auxiliary induction bar is arranged in the center of the barrel; and the feeding and discharging device is connected to the PLC automatic control module. The power supply control and heat supply device is connected with the red copper pipe through a silicon controlled rectifier medium-frequency power supply, and an air supply and exhaust device, a temperature control device and a sealing device are additionally arranged. Fossil fuel is replaced by electric heating, carbon emission is reduced, environmental protection is achieved, temperature control is accurate, heat efficiency is high, and energy consumption and cost can be saved. One set of equipment is suitable for different solid waste raw materials, pretreated products are obtained through different roasting methods, the equipment is simple, investment is saved, the technological process is short, applicability is high, heating is even through the structural design, sealing is good, continuous production can be achieved, and heat efficiency and production efficiency are improved.

vertical regenerative parallel-flow kiln comprising at least two vessels (1,2) interconnected by a gas transfer channel (3), each vessel comprising, in the in-service or out-of-service position, a loading inlet (5) for carbonate mineral rock at the top of the vessel, means for firing the rock, a discharge outlet (8) for the decarbonated calcined material produced at the bottom of the vessel, a cooling air inlet (7) at the bottom of the vessel for counter-cooling the calcined material produced, and a central collecting element (21) having, at its upper end, a collection opening (24) for the cooling air heated by the calcined material and, at its lower end, an extraction outlet (22), each vessel further comprising a protective cap-shaped element (25) which is fixed in the vessel in a position independent of the central collecting element (21),by covering and surrounding its upper end down to a level lower than the harvest opening (24), so as to leave, between this upper end and the cap (25), a free passage for the collection of heated cooling air through the harvest opening (24).

A low-sulfur granulated metallic unit having a mass fraction of sulfur between 0.0001 wt. % and 0.08 wt. % is disclosed herein. Additionally or alternatively, the granulated metallic unit can comprise a mass fraction of phosphorous of at least 0.025 wt. %, a mass fraction of silicon between 0.25 wt. % and 1.5 wt. %, a mass fraction of manganese of at least 0.2 wt. %, a mass fraction of carbon of at least 0.8 wt. %, and / or a mass fraction of iron of at least 94.0 wt. %.

The invention discloses an anti-crusting vertical continuous graphitization furnace and an anti-crusting method in the technical field of graphitization furnaces, the top of the graphitization furnace is provided with an exhaust hole and a blanking pipe, and the bottom of the graphitization furnace is provided with a discharge pipe; a vertical graphite electrode is arranged in the graphitization furnace, and the bottom end of the graphite electrode is positioned on the lower edge of the high-temperature heating area; an exhaust pipe is arranged on the graphitization furnace and is used for exhausting ash steam in the high-temperature heating area to the outside of the furnace so as to prevent the ash steam from condensing and crusting in the low-temperature area.

Treating cooling water in industrial production facilities and associated systems, devices, and methods are disclosed herein. The system can comprise a cooling tower with a first and second cell, each having a housing to receive return water and a sump below to maintain supply water configured to directly contact molten metal. The system includes an inlet and an inlet line to provide return water to the cooling tower and an outlet and an outlet line to direct supply water back to the industrial production facility. The inlet, outlet, and cooling tower form a closed-loop network. Additionally, a blowdown line is fluidically coupled to the outlet to divert a portion of the supply water away from the closed-loop network.

A furnace cleaning device for a continuous graphitization and purification furnace, the furnace cleaning device comprising a graphite supporting plate and a sweeper which are arranged in a lower barrel, wherein the graphite supporting plate is connected to the lower bottom face of a bottomless crucible at the very bottom of a crucible group, and the sweeper is arranged in the bottomless crucible and is in transmission connection with a graphite transmission shaft; and the sweeper is driven by the graphite transmission shaft to rotate so as to scrape and sweep the inner wall of the bottomless crucible and the upper surface of the graphite supporting plate, such that materials fall out of a discharging hole, and scale adhering to the inner wall of the bottomless crucible and the upper surface of the graphite supporting plate is removed. Thus, scale in the furnace can be removed in time, non-production time such as for a furnace shutdown and furnace dismantling is shortened, the production efficiency is improved, and the energy consumption is reduced.

The invention discloses artificial graphite and a preparation method thereof, a negative pole piece, a battery and electric equipment. The preparation method comprises the steps that raw materials are put into a graphitization furnace, the raw materials comprise carbon particles, the particle size of the carbon particles ranges from 1 cm to 8 cm, and the graphitization furnace works in the inert gas atmosphere; the raw materials are controlled to enter a preheating zone of the graphitization furnace, so that the raw materials are preheated, and the temperature of the preheating zone is 800-1500 DEG C; feeding the preheated material into a graphitization area of a graphitization furnace so as to carry out graphitization treatment on the preheated material; and feeding the graphitized material into a cooling area of the graphitization furnace so as to cool the graphitized material. In the implementation mode, the graphitization process is continuous, the procedures do not need to be stopped and switched, all the procedures are carried out in the same graphitization furnace, the production period is shortened, and the productivity can be improved.

Processing granulated metallic units within electric arc furnaces (EAFs) and associated systems, devices, and methods are disclosed herein. A representative method can include receiving granulated metallic units in an EAF, wherein the granulated metallic units comprise no more than 0.05 wt. % of sulfur and at least 50% of particles in the granulated iron material have a particle size of at least 6 millimeters. The method can include applying electrical energy to the granulated iron via electrodes and melting the granulated iron material to form a molten steel product. The method can also include tapping the EAF to remove the molten steel product from the EAF.

Torpedo cars for use with granulated iron production, and associated systems, devices, and methods are disclosed herein. In some embodiments of the present technology, a torpedo car includes a tilting mechanism, a body rotatably coupled to the tilting mechanism, and a controller operably coupled to the tilting mechanism to control tilting of the body. The body can include (i) an inner surface defining a cavity and a channel, and (ii) an outer surface defining an opening to the cavity and a channel outlet of the channel spaced apart from the opening. The channel can extend between the channel outlet and a channel inlet interfacing the cavity. The inner surface can include a slag dam configured to prevent slag from exiting the opening while the torpedo car tilts. The controller can control the tilting mechanism to control molten metal flow out of the cavity through the channel.

Railcars for transporting granulated metallic units, and associated systems, devices, and methods are disclosed herein. For example, a reinforced railcar apparatus includes a container envelope and a reinforcement liner. The container envelope includes side walls and end walls extending from a floor of the railcar. The side walls are a first length and the end walls are a second length less than the first length. Top portions of the rigid side walls and end walls define an opening of the container envelope through which granulated metallic units are discharged into the railcar assembly. The railcar assembly includes angled interior walls coupled to the bottom surface and extending from a top portion of the end walls to the bottom surface. The reinforcement liner is disposed over a portion of the bottom surface and the angled interior walls. In some embodiments, the railcar assembly includes an open-topped box layered with impact-absorbing material.

The invention discloses a graphitization furnace convenient to clean, and relates to the field of graphitization furnaces, the graphitization furnace comprises a bottom plate, a pair of vertical plates and a furnace body; the vertical plates are fixedly installed on the bottom plate, the furnace body is rotatably installed between the vertical plates, an annular cover is installed in the furnace body, a straight gear ring is rotatably installed in the annular cover, a first motor is fixedly installed on the side wall of the furnace body, and a driving bevel gear is fixedly installed at the driving end of the first motor. A driven bevel gear meshed with the driving bevel gear is rotatably mounted in the annular cover, a straight gear meshed with the straight gear ring is fixedly mounted on the driven bevel gear, a mounting rod is mounted on the straight gear ring, and a scraping plate is mounted on the mounting rod. If the cleaning is not performed, the graphitization effect of the graphitization furnace can be influenced, and if the manual cleaning is performed, time and labor are wasted, so that the subsequent graphitization efficiency is influenced.

A low-carbon granulated metallic unit having a mass fraction of carbon between 0.1 wt. % and 4.0 wt. % is disclosed herein. Additionally or alternatively, the granulated metallic unit can comprise a mass fraction of phosphorous of at least 0.025 wt. %, a mass fraction of silicon between 0.25 wt. % and 1.5 wt. %, a mass fraction of manganese of at least 0.2 wt. %, a mass fraction of sulfur of at least 0.0001 wt. %, and / or a mass fraction of iron of at least 94.0 wt. %.

The invention relates to the technical field of waste heat utilization, in particular to an energy-saving monitoring system for waste heat recycling of a shaft furnace, which comprises a waste heat network building module for acquiring waste heat information of the shaft furnace and pipeline information and building a waste heat circulating network; the region segmentation module is used for carrying out region segmentation according to the waste heat circulation network, carrying out thermal distribution analysis on the circulation volume, the heating area and the heating point of each region on the waste heat circulation network, and obtaining thermal distribution characteristics and thermal field change values; the thermal field analysis module is used for carrying out demand analysis on each node of the waste heat circulation network, identifying the thermal disturbance quantity of each node relative to an adjacent heating point by utilizing the thermal distribution characteristics and the thermal field change value, and determining the shortest connection path of the waste heat circulation network under the thermal disturbance quantity; the node feedback module is used for performing node feedback on each node of the waste heat circulation network and determining a node feedback mode of each node; and the waste heat utilization efficiency and safety are improved.

The invention discloses an external heating shaft furnace reaction system and method for direct hydrogen reduction of vanadium-titanium-iron concentrate, and belongs to the technical field of ferrous metallurgy. The system comprises a heating shaft furnace assembly, a feeding system, a furnace gas circulation and gas inlet system, a heating and heat transfer system, a cooling and discharging system and the like. A feeding system and a gas outlet are arranged at the top end of the preheating section; a heating and heat transfer system is arranged on the reaction section; the heating and heat transfer system comprises an induction heating heat transfer body, an induction heating coil and an insulation heat preservation material; an annular air inlet cavity is formed in the cooling section close to the reaction section; the furnace gas circulation and gas inlet system comprises a gas phase reforming reactor, a bag-type dust collector, a gas storage tank and a dry hydrogen source, a gas outlet of the preheating section is connected with the gas phase reforming reactor, and an outlet of the gas storage tank and an outlet of the dry hydrogen source are both connected with the annular gas inlet cavity. According to the system, carbon is supplemented in the reduction process, the annual output is 100 thousand t or above, the hydrogen utilization rate is not lower than 84%, and the Fe element metallization rate can reach 90% or above.

The present disclosure provides a vertical furnace. The vertical furnace comprises a furnace tube, a storage device, a loading device, a wafer boat, a first carrying device, a second carrying device and a gas system. A furnace chamber used for heating a wafer is arranged in the furnace tube. The storage device is provided with a storage chamber and a carrying table located in the storage chamber, and the carrying table is used for carrying a wafer box. The loading device is used for loading a wafer box for storing a wafer to be heated. The wafer boat is used for moving a wafer to be heated between the furnace chamber and the loading device. The first carrying device is used for moving the wafer box between the carrying table and the loading device. And the second carrying device is used for moving the to-be-heated wafer between the loading device and the wafer boat. And the gas system comprises a gas inlet port and a gas outlet port which are arranged on the carrying table, and is used for introducing protective gas into the wafer box through the gas inlet port and discharging the gas from the wafer box through the gas outlet port so as to inject the protective gas of which the pressure is greater than the environmental pressure into the wafer box. Consequently, pollutants in the environment can be prevented from making contact with the wafer, and the interior of the wafer box is clean.

A blast furnace operation method according to one aspect of the present disclosure comprises: a parameter estimation step for estimating blast parameters and a pulverized coal ratio in a second operation, such that the amount molten iron produced, the molten iron temperature, and the furnace top gas temperature in the second operation match those in a reference operation; a change information acquisition step for acquiring information on a temporal change in one or both of the molten iron temperature and the amount of molten iron produced when performing the second operation based on the blast parameters and the pulverized coal ratio estimated in the parameter estimation step with a delay of a predetermined time after switching from the reference operation to the first operation; a repeating step for performing the change information acquisition step a plurality of times while changing the predetermined time; and an optimum delay time acquisition step for determining, as an optimum delay time, a predetermined time such that the temporal change in the molten iron temperature or the amount of molten iron produced is the smallest, on the basis of the information acquired in the repeating step. After switching from the reference operation to the first operation, the second operation based on the blast parameters and the pulverized coal ratio estimated in the parameter estimation step is started with a delay of the optimum delay time.

High temperature furnaces, calcining, pyrolysis and other high temperature manufacturing processes, composition rearrangements, and equipment. Systems, equipment and processes using oxyfuel combustion using gaseous fuels for cement manufacture. Reactor furnaces using oxyfuel containing natural gas and gravity feed to process pellets forming a pellet bed into cement.

The utility model discloses a surge suppression device for a centrifugal fan. The surge suppression device is connected to a variable-frequency magnetic suspension centrifugal blower and a shaft furnace. An air outlet of the variable-frequency magnetic suspension centrifugal blower is communicated with an air inlet pipeline of the shaft furnace; comprising an electric control valve, a bypass pipe, an air volume detector and a display, a bypass pipe is arranged on a pipeline for communicating the air outlet of the variable-frequency magnetic suspension centrifugal blower with the air inlet of the shaft furnace; an electric control valve is arranged on the bypass pipe; the electric control valve is arranged on the bypass pipe; the air volume detector is arranged at an air inlet of the variable-frequency magnetic suspension centrifugal blower; the air volume detector is electrically connected with the displayer. The device combines the characteristic of high-rotating-speed operation of the magnetic suspension fan, and can effectively avoid the surge phenomenon at the low-firepower preheating stage of the shaft furnace under the conditions that the pipe network resistance is not increased and the fan maintains the existing constant-pressure variable-frequency control mode.

A process for operating an oxidizable combustion gas cleaning unit in a metallurgical plant, including the steps of: (a) passing an oxidizable combustion gas from a metallurgical reactor, in particular a blast furnace gas from a blast furnace, in a packed bed scrubber arrangement through a packed bed in countercurrent with a washing water or in a spray scrubber arrangement to remove cyanide compounds, in particular hydrogen cyanide, and to increase the removal of chloride compounds, in particular hydrogen chloride, from the combustion gas by solubilizing the cyanide and chloride compounds in the washing water, (b) collecting the washing water containing solubilized cyanide and chloride compounds at a bottom end of the packed bed or spray scrubber arrangement, and (c) collecting a cleaned oxidizable combustion gas at a top of the packed bed or spray scrubber arrangement, wherein a base is added to the washing water before step (a).

The invention relates to a design scheme suitable for hydrogen electric heating equipment of a hydrogen-based shaft furnace, belongs to the technical field of hydrogen metallurgy for directly reducing the hydrogen-based shaft furnace, and aims to solve the problems that the aging of a heating rod is influenced and the service life of a heating furnace is influenced due to reduction reaction between hydrogen and the heating rod at high temperature. The pure hydrogen high-temperature electric heating adopts a split type structural design, and a heating rod distribution cavity and a hydrogen heating cavity are isolated from each other, so that the surface of a silicon-molybdenum heating rod is prevented from being subjected to a reduction reaction with high-temperature hydrogen and water vapor; the heating rod distribution cavity is filled with nitrogen, the pressure of the heating rod distribution cavity is larger than that of the hydrogen heating cavity, hydrogen leakage of the hydrogen heating cavity is prevented, and the safety of the whole heating furnace is improved. The heating furnace adopts a three-section structural design, maintenance personnel can conveniently maintain the internal structure of the heating furnace and replace parts, and the service life and the safety performance of the pure hydrogen heating furnace are improved through the design mode of the heating furnace.

A slag barrier plate for a side-blown melting furnace with a melting bath, characterized in that it comprises: a slag barrier unit (1) with a plate body (11) for holding back molten slag; a heat dissipation unit (2) comprising: a cooling water jacket (21) extending through the interior of the plate body (11) to continuously introduce cooling medium into the plate body (11) to lower its temperature; a distributor arrangement (22) arranged at the end of the cooling water jacket (21) to introduce the cooling medium into the cooling water jacket (21).

The invention provides vertical heat treatment equipment and a conveying device thereof, the conveying device comprises a device main body, a transmission belt mechanism and a stop mechanism, the transmission belt mechanism is used for transmission between a driving part and a driven part of the device main body, and the transmission belt mechanism comprises a transmission belt; the stop mechanism comprises a stop part and a matching assembly, the stop part is fixedly connected with the driven piece, and the stop part is provided with a stop structure; the matching assembly comprises a retainer and enables the retainer to be far away from the retaining structure under the support of the transmission belt, and when the transmission belt is broken, the retainer is matched with the retaining structure to stop rotation of the driven part. In the stopping process of the conveying device, a detection device does not need to detect signals, and stopping can be achieved without signal control, so that the reliability of the stopping process is improved, and the cost of the conveying device is reduced.