884results about "Cooling devices" patented technology

A heat exchanger 10 includes a conduit 12 for conveying cooling fluid relative to a body to be cooled. A heat transfer arrangement 62 is arranged in communication with an interior of the conduit 12, the heat transfer arrangement 62 and the conduit 12 together defining an assembly that is mountable adjacent the body to be cooled, convective heat exchange occurring, in use, due to movement of the cooling fluid relative to the body and the heat transfer arrangement 62 of the assembly and radiant heat exchange occurring between the body and at least part of the heat transfer arrangement 62 of the assembly.

Systems and methods provide a cooling device for a blast furnace that may prevent an excessive amount of coolant from entering the blat furnace and may be easily installed in a conventional blast furnace. Systems and methods may provide a cooling device for a blast furnace that may prevent an excessive amount of coolant from entering the blast furnace and may be simple and cost effective to manufacture. The end of a heat pipe (202) that is outside of the furnace may be configured to interact with a heat sink (210). The heat sink (210) may be for example, a separate amount of coolant that is circulated outside of the furnace, an evaporative cooling system, and/or any other system or method of cooling the heat pipe (202) that transfers heat from the heat pipe (202) to the heat sink (210). Because the coolant within the heat pipe (202) is sealed within the heat pipe (202), only the small, fixed amount of coolant that. is within the heat pipe (202) will enter the furnace should the cooling plate (200) rupture. Thus, substantial damage to the furnace, extensive repairs, and/or long periods of non-production may be avoided.

The present invention is an apparatus and method for the direct reduction of iron oxide utilizing a rotary hearth furnace to form a high purity carbon-containing iron metal button. The hearth layer may be a refractory or a vitreous hearth layer of iron oxide, carbon, and silica compounds. Additionally, coating materials may be introduced onto the refractory or vitreous hearth layer before iron oxide ore and carbon materials are added, with the coating materials preventing attack of the molten iron on the hearth layer. The coating materials may include compounds of carbon, iron oxide, silicon oxide, magnesium oxide, and/or aluminum oxide. The coating materials may be placed as a solid or a slurry on the hearth layer and heated, which provides a protective layer onto which the iron oxide ores and carbon materials are placed. The iron oxide is reduced and forms molten globules of high purity iron and residual carbon, which remain separate from the hearth layer. An improved apparatus includes a cooling plate that is placed in close proximity with the refractory or vitreous hearth layer, cooling the molten globules to form iron metal buttons that are removed from the hearth layer. The improvements due to the present apparatus and method of operation provide high purity iron and carbon solid buttons, which are separate from slag particulates, and discharged without significant loss of iron product to the interior surfaces of the furnace.

The invention discloses a construction method for blast furnace internal cooling wall and furnace lining. Firstly, an access opening through which the blast furnace internal cooling wall enters into an internal furnace is arranged on the furnace mantle above a blast-furnace tuyere; the cooling wall under a furnace bosh is firstly arranged by ways that a cooling wall lifting appliance arranged at the furnace throat of the internal furnace and a lifting movable swinging tray swinged in the internal furnace firstly, and a furnace bosh protection shed and a furnace lining lifting appliance are arranged at the furnace bosh secondly. Then, and the cooling wall is arranged at the top part of the furnace bosh by the cooling wall lifting appliance and the movable swinging tray, meanwhile the furnace lining construction is carried out at the lower part of the furnace bosh by a furnace lining lifting appliance and the cooling wall except for the access opening is sealed so as to complete the construction of the cooling wall of the access opening. The construction method has the advantages of low cost, convenient operation, short construction period and high construction efficiency, etc.

A technology for casting the steel-based cooling wall features that the cooling medium which is the mixture of corundum powder, iron powder and electrode powder is filled in its cooling pipeline. Said cooling medium features strong cooling action, low thermal expansibility, not adhering to pipe wall, and easy removing it.

Agglomerates with a carbonaceous material incorporated therein and a process for producing reduced metal using the agglomerates are provided. The agglomerates are prepared with high-VM coal, which is widely and abundantly produced and is less expensive, and they provide high strength after reduction without the need for finer metal oxide particles. The agglomerates are made of a carbonaceous material and a raw material to be reduced that contains a metal oxide, such as iron ore. The carbonaceous material used is a high-VM coal containing 35% or more by mass of volatile matter. The agglomerates are formed at a pressure of at least 2 t/cm² so that the porosity thereof is reduced to 35% or less. The reduction in porosity is effective in promoting heat transfer inside the agglomerates in a rotary hearth furnace in a high-temperature reduction step so that the sintering of reduced metal proceeds efficiently in the overall regions of the agglomerates to produce a reduced metal having high crushing strength.

The present invention relates to a method for preparing water cooling system of blast furnace cooling wall. A technical scheme is that: the cooling system includes a cooling water pipe (8) and an outer water pipe (3), the cooling water pipe (8) communicates with the outer water pipe (3), the cooling water pipe (8) is beset on the blast furnace cooling wall (5) passing through a furnace shell (1) and a filling agent layer (2). When the cooling water pipe (8) is broke and water leakage in the blast furnace cooling wall (5), the cooling water pipe (8) disconnects with the outer water pipe (3) on the furnace shell (1), then a metal flexible pipe (6) passes through the cooling water pipe (8), and two ends of the metal flexible pipe (6) communicates with the disconnected out water pipe (3). The metal flexible pipe (6) located on the furnace shell outside is equipped with a valve for controlling, grouting material (7) is filled between the metal flexible pipe (6) and the furnace shell (1). The method has characteristics of convenient operation, safety, low cost and superior integrality which can be widely used for preparing the water pipe with water leakage in the blast furnace cooling wall system.

The invention discloses a blast furnace superconducting cooling and waste heat power generation system. The system is composed of a blast furnace body (1), a power generation system (12) and a steam utilization device. The system is characterized in that more than one superconducting ring type heat exchange ring (2) is arranged along the side wall of the blast furnace body (1) in a layering and surrounding mode; each superconducting ring type heat exchange ring (2) is provided with a pouring solidification body (10) formed by using wear-resisting thermal-shock-resisting carburizing-resisting elastic castable refractory; each superconducting ring type heat exchange ring (2) is embedded in the inner lining of the side wall of the blast furnace body (1) through the pouring solidification body (10); and the like. According to the invention, hot water subjected to heat exchange is intently led out through the superconducting ring type heat exchange ring and an annular pipeline system corresponding to the superconducting ring type heat exchange ring, thus heat exchange intensity is enlarged, and heat exchange efficiency and cooling efficiency are improved; and the traditional cooling water temperature is improved to 250 DEG C from 40 DEG C, and then the cooling water is overheated to 400 DEG C through applying the superconducting ring type heat exchange ring twice, so that cooling waste heat can be utilized for power generation.

The present invention discloses a furnace cooling intensity control method based on vague PID control, and belongs to the technical field of furnace cooling control. The control method is based on the heat transfer theory and the engineering thermodynamics. A novel furnace water supply cooling method is provided; a diverging three-way valve serves as an executing mechanism; advantages of conventional PID control and vague control are combined; according to nonlinearity, obsoleteness and possible uncertain factors of a furnace cooling intensity control method and operating characteristics of a furnace closed-loop soft water circulating cooling system, PID parameter self-tuning inference rules are established, and opening of the diverging three-way valve is adjusted, thereby controlling cooling wall cooling intensity; in comparison with those in the prior art, real-time control of the cooling intensity is realized, control accuracy and stability are also raised, and manpower consumption is reduced.

In a forming mold equipped with a cooling channel for circulation of a refrigerant composed of a cooling gas and a atomized cooling liquid, any increase of back pressure attributed to evaporation of the refrigerant fed to the cooling channel is inhibited to thereby attain cooling acceleration, and further any occurrence of rust or scale by the refrigerant circulated through the cooling channel is prevented. Accordingly, a channel for supply of the refrigerant to the cooling channel of the forming mold is provided with air pressure source for trapping of air in the supply channel and pressure feeding of the same; oxygen separation means for separation removal of oxygen from the pressure fed air to thereby lower the oxygen concentration of the air; and atomizing means for spraying of the cooling liquid into the air with oxygen concentration lowered. The oxygen separated from the air by the oxygen separation means is returned to the refrigerant forcedly emitted from the cooling channel by means of forced exhaust means.

The invention discloses a hoisting method for replacing a cooling wall in overhauling of a blast furnace. The hoisting method is characterized by comprising the following steps of: 1, making a special pallet for installing the cooling wall in the blast furnace; 2, unchoking a special channel for hoisting the cooling wall; 3, installing a windlass and fixed pulleys on a platform at the top of the furnace; and 4, hoisting the cooling wall by a furnace top overhauling hoist. The hoisting method disclosed by the invention has the advantages of reasonable installation, safety and reliability, the time of replacing the cooling wall is saved, and the overhauling cost is reduced.

An efficient energy-saving dust-collecting method and its apparatus for iron-smelting blast furnace are disclosed. The procedure is carried out by pre-cooling wet air before entering them into air blower, re-cooling, lowering temperature below saturated temperature, coagulating while precipitating for water content in wet air, re-cooling, delivering into blast furnace by air blower, discharging smoke from blast furnace, heat-exchanging, recovering partial tailed heat, lowering temperature, bagged collecting dust, storing or generating. It's cheap and simple, has higher heat-transfer rate, long utilizing life, less apparatus, full combustion and recovery and better high-temperature resistance for bagged dust collector.

The invention belongs to a repairing method of iron-making blast furnace equipment, which relates to a cooling wall leakage repairing method. The method mainly solves the technical problems that grouting can stop leakage but can not repair big gaps and the conduction cooling capacity is reduced after grouting. The repairing method of cooling wall leakage is characterized in that the method comprises the following steps of: a. shell opening: including opening holes with apertures of 150 to 250mm on the furnace shell around water pipes on a cooling wall; b. root grooving: including opening grooves at the root part of the cooling wall around the leaking water pipes and sheaths for eliminating cracks as well as molding sand, slag inclusion and loosening on the surface of the cooling wall; c. surface pretreatment: comprising eliminating the grooving parts and residual oxidative metal and oxide films on the surface around the grooves for exposing the metallic luster; d. leakage repairing: the leakage repairing method includes one process of a welding process and a high-molecular polymeric metal bonding process or a composite process combining the two processes; and e. hydrostatic test: after the repairing work, water is supplied for testing the pressure for 30min so as to check the leakage condition. The method is mainly used for repairing cooling wall leakage of blast furnaces.

A cooling plate for an iron and steelmaking furnace includes a copper cooling plate body having at least one cooling duct for a cooling medium extending essentially parallel with the back of the cooling plate body. The cooling plate body further includes a preformed, externally accessible recess into which the cooling duct opens. A connection piece is utilized as a cooling medium connection on the back of the cooling plate body, while a formed piece fitted within the externally accessible recess forms a deflection surface for the cooling medium flowing from the connection piece into the cooling duct, or from the cooling duct into the connection piece.

A cooling device and a cooling method for a hot strip allow uniform and stable cooling of the strip at a high cooling rate when supplying the coolant to the upper surface of the hot strip. The cooling device includes an upper header unit 21 for supplying a rod-like flow to the upper surface of the strip 10. The upper header unit 21 is formed of the first upper header group including plural first upper headers 21a arranged in a conveying direction and a second upper header group including plural second upper headers 21b arranged in the conveying direction. The cooling device is provided with an ON-OFF mechanism 30 to allow each of the upper headers 21a and 21b of the first and the second upper header groups to independently execute the ON-OFF control (start/end injection control) of an injection (feeding) of the rod-like flow.

A cooled furnace wall comprises a furnace shell with an inner and an outer side and cooling plates lining the inner side of the furnace shell. Each of the cooling plates has a plate body and protruding connection pieces for supplying the cooling plate with a coolant. The furnace shell has connection openings therein for interconnecting the connection pieces of adjacent connection plates from the outer side of the furnace shell. At least one of the connection pieces is formed by a tube bend that protrudes from an edge face of the plate body and that has a connection end to extending through one of the connection openings in the furnace shell.

A stave for a metallurgical furnace comprises a stave body and a path for a coolant. The stave body is unitarily formed of a casting of copper or a copper alloy. The path for a coolant is formed within the stave body when the stave body is cast, and the path having an inner diameter.

A method for detecting out leakage and its position on cooling wall of blast furnace includes confirming line existed by damaged cooling wall, blocking water supply of said line, supplying air on water supply tube and opening air vent valve at top section of cooling wall, leading compressed air with pressure greater than pressure in furnace in water supply tube on said cooling wall, opening air vent valve on adjacent cooling wall to see whether there is water being led out or not then opening said valve on cooling wall of the line in sequence till water is led out at one of valves ,confirming that section above water-out valve is damaged .

The present invention relates to a power generation method by utilizing iron-smelting blast furnace cooling water backwater residual pressure (water head). It is characterized by that said invention utilizes the principle of small runoff type hydroelectric generation in the blast furnace cooling backwater system, and utilizes the blast furnace cooling water backwater and makes the blast furnace cooling water backwater be flowed into cooling water pump or be freely discharged to form a height difference with about 9 m and produce a stable water resource with stable water head and stable water quantity, and utilizes the stable water resource to implement power generation. Besides, said invention also provides a technical scheme for implementing the invented power generation method.