802results about "Heating stoves" 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.

The invention provides a constant wind temperature control system for a hot blast stove, comprising the hot blast stove (2), a detection element, a regulating valve, a data acquisition unit (1) and a computer (26). The control method of the control system comprises the following processes: detection of fluid parameters and valve location signals, data acquisition, data transmission, data comparison and data correction and control adjustment, wherein the detection element and the regulating valve are arranged in a pipeline, and temperature measuring equipment is arranged on the surface of a stove body. Specific steps are as follows: dynamically calculating parameters such as the heat storage capacity of checker bricks, temperature-rise ratio, theoretical wind temperature and the like during the combustion process, and carrying out on-line adjustment of parameters such as combustion air and gas flow, preheating temperature and the like; controlling direction change of the hot blast stove by the highest setting temperature of the checker bricks, a stove top and fume; and during the air supply period, taking hot blast temperature control as a target to determine an air supply curve and air supply time. The method based on calculation of dynamic balance of on-line energy of the hot blast stove effectively controls the heat storage capacity of the checker bricks of the hot blast stove, adjusts air supply quantity and air supply time, and ensures stable output of wind temperature of the hot blast stove.

The invention provides an intelligent control method for automatic optimization combustion of a hot-blast stove. Based on computation of total heat supply amount, by setting the target values of the temperature of a combustion arch top and the temperature of exhaust gas, an air-fuel ratio fuzzy controller optimizes optimal air-fuel ratio coefficients in a combustion period in real time to regulate the flow of combustion-supporting air and mixed gas in real time; the control of the flow of the combustion-supporting air is completed by an exhaust gas temperature regulator, a heat supply amount regulator and a combustion-supporting air regulator; the control of the flow of the mixed gas is completed by an arch top temperature regulator and a mixed gas regulator; and the control of the air-fuel ratio is completed by the air-fuel ratio fuzzy controller. The invention can improve the combustion control level of the hot-blast stove and has the advantages of high combustion efficiency, full utilization of energy sources and strong heat storage capacity.

The invention publishes a process to increase the bioleaching speed of ores or concentrates of sulfide metal species in heaps, tailing dams, dumps, or other on-site operations. The process is characterized by the continuous inoculation of the ores or concentrates with isolated microorganisms of the Acidithiobacillus thiooxidans type, together with isolated microorganisms of the Acidithiobacillus ferrooxidans type, with or without native microorganisms, in such a way that the total concentration of microorganisms in the continuous inoculation flow is of around 1×10⁷ cells/ml to 5,6×10⁷ cells/ml. In particular, the invention publishes the continuous inoculation of Acidithiobacillus thiooxidans Licanantay DSM 17318 together with Acidithiobacillus ferrooxidans Wenelen DSM 16786 microorganisms, or with other native microorganisms at a concentration higher than 5×10⁷ cells/ml. In addition to the inoculation of isolated bacteria, the invention includes the addition of oxidizing agents such as the ferric ion produced externally, together with nutrients in the shape of salts of ammonium, magnesium, iron, potassium, as well as air enriched continuously with carbon dioxide to promote bacterial action in the bioleaching process of ores or concentrates.

An electric composite rotating machine haveing two rotors, capable of developing mechanical power and of runing on two rotational direction at selfadjutable speeds, of differential type, with 40% increase of output, doubling the torque at 30% reduction of used electrical energy.

The present invention is directed to a precious metal recovery process in which carbonaceous material, such as preg robbing carbon, is floated after sulfide oxidation to separate the carbonaceous material from the precious metal.

The invention relates to an automatic control system for changing the combustion rhythm of a hot blast furnace along with the blast temperature of a high furnace, belonging to the technical field of automatic control on a hot blast furnace of a high furnace. The automatic control system is composed of an air/coal gas regulating valve, a PLC (programmable logic controller), an industrial control computer and intelligent control software, wherein the air/coal gas regulating valve is used for controlling the flow of air or coal gas; the PLC is used for collecting pressure and flow information of coal gas and air, realizing logic linkage and protection and simultaneously outputting a given valve position to control the action of the regulating valve; the industrial control computer is used as a hardware carrier of the intelligent control software, and is used for acquiring coal gas pressure, air pressure, coal gas flow, air flow, coal gas regulating valve signals and air regulating valve signals from the PLC, calculating the appropriate valve position through the intelligent control software and transmitting the valve position to the PLC; and the intelligent control software is the core of the automatic control system, and is used for realizing the automatic control on the combustion process in the situation that the external conditions are changed. The automatic control system has the advantage that the problems on the automatic combustion of a hot blast furnace and the dynamic control on the combustion rhythm of the hot blast furnace are solved.

The invention discloses an intelligent optimization control system of a blast furnace hot-blast stove, which relates to the technical field of blast furnace ironmaking optimization control and can reduce coal gas consumption, ensure equipment safety and prolong the service life on the premise of ensuring that the required hot-blast temperature and flow of a blast furnace are satisfied. The system is technically characterized in that the on-line calculation of a heat accumulation rate is realized based on heat balance, a reasonable heat accumulation rate setting curve is set according to the required total heat amount of blast and heating time of the blast furnace and the heat accumulation rate characteristic of a hot-blast stove, the amount of fuel in the heating stage is controlled in real time according to the heat accumulation rate, and the calculated amount of fuel is limited according to accepted upper limits of arch crown temperature and exhaust gas temperature processes. The system fully meets the demands of the blast furnace for hot blast, reduces lost heat carried away by waste gas and simultaneously ensures the equipment safety; and furthermore, the air-fuel ratio is optimized by taking the heat accumulation rate as the optimization target value and using a trial-and-error self-optimization algorithm, so that the fuel utilization is maximized, and the energy saving of the device is ensured at multiple levels.

The invention provides a cooling system for protecting an image fiber and an imaging device from thermal influences and a temperature measurement apparatus, for a molten metal, capable of being easily controlled and stably measuring the temperature. The temperature measurement apparatus for a molten metal comprises four connectable portions of a nozzle portion a purge/cooling gas introduction portion, an image fiber fitting portion with a window glass and an image fiber to a double pipe nozzle protection tube. A distance from a nozzle distal end as an introduction portion of thermal radiation light to a light reception portion at an image fiber distal end becomes short so that a greater amount of thermal radiation light can be received.

The invention relates to compatible control method for hot-blast stove of blast furnace, which comprises: determining the lowest blast temperature, designing correlated process parameters and constructing case database; extracting burning data to add into database; obtaining real-time process parameters; with case-base inference method, predicting the time that blast temperature drops down to lowest temperature as the blast end time and the burning terminal time of successive furnace; comparing the predicted time with preset terminal time of successive furnace; according to result, changing gas supply to achieve the waste gas temperature upper limit with set terminal; repeating said steps to realize the variable-period running. This invention increases total blast temperature, and reduces blast temperature.

A process for producing a steel includes subjecting at least a portion of a melt of the steel to electroslag remelting and, in a subsequent step, heating the steel to a temperature at least as great as the lowest temperature at which all carbides that can form in the remelted steel will dissolve and no greater than the nil ductility temperature of the of the remelted steel, and maintaining the temperature for a period of time sufficient to dissolve primary and clustered carbide particles in the remelted steel greater than 15 micrometers in length. A novel martensitic stainless steel also is disclosed including 0.65 to 0.70 carbon; 0 to 0.025 phosphorus; 0 to 0.020 sulfur; 0.20 to 0.50 silicon; at least one of greater than 0.0004 boron and greater than 0.03 nitrogen; 0.45 to 0.75 manganese; 12.7 to 13.7 chromium; and 0 to 0.50 nickel.

The invention discloses a repatching method for the top liner of a blast furnace hot-wind pipeline. According to the damage condition of the liner of the pipeline, a pipeline steel housing (1) is provided with a hole, and the periphery of the inner surface of the pipeline steel housing (1) is welded with lifting hooks (6) and a wood mould supporting is supported well (5), and then a working layer pouring material (8) and a warm keeping pouring material (7) are poured, and then the pipeline steel housing (1) is welded well; a pipeline skin is welded with more than two mudjacking holes (9), and mudjacking material is pressed into the gap between the steel housing (1) and the warm-keeping pouring material (7), and the construction pressure is kept between 2 to 3kg/cm2. The invention resolves the emergency gusty repatching problem for the damage of the blast furnace hot-wind pipeline, so that the liner of the blast furnace hot-wind pipeline is repaired fast , thus improving the construction effect of the pipeline repatching.

The invention discloses a hot-blast furnace pipe packing material and a preparation method therefor. The packing material is prepared from the ingredients in parts by weight: 100 parts of dry mattersand 10-25 parts of silica sol, wherein the 100 parts of dry matters comprise high bauxite, flint clay or mullite particles, silicon carbide particles, high bauxite or corundum powder, metal-nonmetal composite powder, activated alumina micropowder, calcined alumina micropowder, clay micropowder, carboxymethyl cellulose or hydroxymethyl cellulose and a curing agent. The packing material disclosed bythe invention is pollution-free to environments, is good in fluidity in construction time, is not prone to settlement, can be thoroughly packed into small slits during pressed-in repair, can be constructed at high temperatures and can also be cured at normal temperatures; the packing material can be tightly bonded to a material of a pressed-in area; the packing material has good strength propertyat all temperatures; the packing material has low linear shrinkage in service temperature intervals and has good thermal shock stability; and industrial wastes of other industries are utilized, so that the utilization ratio of resources is increased.

Nano-structured interconnect formation and a reworkable bonding process using solder films. Large area fabrication of nano-structured interconnects is demonstrated at a very fine pitch. This technology can be used for pushing the limits of current flip chip bonding in terms of pitch, number of I/Os, superior combination of electrical and mechanical properties as well as reworkability. Sol-gel and electroless processes were developed to demonstrate film bonding interfaces between metallic pads and nano interconnects. Solution-derived nano-solder technology is an attractive low-cost method for several applications such as MEMS hermetic packaging, compliant interconnect bonding and bump-less nano-interconnects.

The invention relates to a high-temperature and low-energy-consumption running state estimation and optimization method for a hot air furnace system. The high-temperature and low-energy-consumption running state estimation and optimization method comprises the following steps of: a, setting a preset running estimation index of the hot air furnace system; b, acquiring real-time monitored running state data of the hot air furnace system; c, quantifying the monitored data, and determining the on-line heat efficiency and the coal gas self-consumption rate of the hot air furnace and the hot air temperature; d, determining the degradation degree and the degradation grade of the hot air furnace system according to a difference between a theoretical extreme value of the index and an on-line monitored actual value; e, determining the type of sensitivity parameters influencing the optimization of the hot air furnace system; and f, optimizing the hot air furnace system according to optimized sensitivity parameters and a corresponding technical scheme called from a technical scheme library according to the type of the sensitivity parameters. According to the high-temperature and low-energy-consumption running state estimation and optimization method, estimation, forecasting and optimization for the production running state of the hot air furnace system are integrated, the running state of the hot air furnace system can be estimated, whether the hot air furnace system runs in a high air temperature and low energy consumption state can be judged, and a scientific and effective technical scheme is supplied to the low-energy-consumption and high-efficiency running of the hot air furnace system.

This invention relates to blast furnace air-stove automatic control method based on example reasoning. At first assure the best skip area of air-stove, and prescribe a technique parameter contained in the example and relating to the burning procedure, and then extract several successful adjusting examples to be the basic examples of the database during the line-functioning phase; according the real time technique parameter during the functioning procedure, calculate the speed or variable amount of the temperature raising of the arch, if it is lower than the rising speed value or more than the allowable falling range, adjust the air burning ratio combining with the example reasoning method to speed up the temperature rising and restrain the arch temperature falling; this invention does not depend on the mathematic model of furnace air-stove, does not detect the residue amount, and confirm the output of controlling decision according to example reasoning to realize the automatic control of the furnace air-stove.

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 discloses a method for guaranteeing high blast temperature by using blast furnace gas, and belongs to the technical field of utilization of blast furnace gas of iron making and combustion of hot-blast furnaces. The method is particularly suitable for being used under the conditions that high heating value gas is in short, and blast furnace gas is rich. The method aims to solve the problem that high blast temperature cannot be guaranteed due to low heating value of the blast furnace gas, and an additional combustion furnace is adopted to guarantee the high blast temperature, and the blast furnace gas is comprehensively utilized; and the method comprises the steps of: utilizing the residual heat of the blast furnace gas, removing dust by a dry method, and performing pressure swing adsorption and mixing and combusting to guarantee high blast temperature. The residual heat of the blast furnace gas and the residual heat produced after the dust is removed by the dry method are used for heating air from an air blower, and the heated air is used as combustion air for combustion of the hot blast furnace and cold air blast at an inlet of the hot-blast furnace; the low heating value blast furnace gas which is obtained after the dust is removed by the dry method and of which the volume proportion is 10 to 40 percent is cooled to enter a pressure swing adsorption device, so that the low heating value blast furnace gas is changed into the high heating value gas, and the high heating value gas and low heating value blast furnace gas obtained after top pressure power generation is mixed and combusted; and under the condition that a hot-blast furnace system is not provided with the additional combustion furnace, the hot blast at the high temperature of between 1,250 and 1,350 DEG C can be provided for a blast furnace for use.

The invention relates to a rapid repairing technology of a blast furnace hot blast stove pipeline. The technology comprises the steps that firstly, imperfect ports are cleaned; secondly, modes are arranged; thirdly, a fish skeleton frame is manufactured; fourthly, high-abrasion-resisting ceramic pouring is conducted; fifthly, a zirconium-contained ceramic fiber blanket is laid fully, and a steel shell is recovered; and finally, mudjacking is conducted. The hot blast stove pipeline can be put into operation after the steps are conducted. To achieve the solidifying effect, it is better to follow the progressive principle when the temperature and pressure of supplied air of a hot blast stove are improved. After the repaired hot blast stove pipeline is put into operation, a daily monitoring checking rule should be established for the part. The rapid repairing technology has the beneficial effects that maintaining is easy and convenient, cost is low, the requirement for rapid repairing can be met, a blast furnace can resume production as soon as possible, and after the hot blast stove pipeline breaks down, production is recovered rapidly, and the production cost is reduced; and refractory needed for repairing has good high-temperature and high-pressure resisting performance and can meet the requirement for normal air supplying of the hot blast stove.