摘要:
Provided is a manufacturing method of ferromolybdenum from molybdenite concentrate, and more particularly, a manufacturing method of ferromolybdenum with copper content of 0.5% or less from molybdenite with high copper content without carrying out a separate copper removing process by putting molybdenite, aluminum metal and iron metal, in a heating furnace and reacting them at high temperature to manufacture the ferro molybdenum at the lower portion thereof, forming a slag using aluminum sulfide and iron sulfide as the main components at the upper portion thereof, and putting most of the copper (80 to 95%) existing in the molybdenite in a slag layer. The exemplary embodiment can shorten a process as compared to a metallothermic reduction (Thermit) method of the related art and reduce the consumption of a reducing agent, i.e., aluminum.
摘要:
Provided is a manufacturing method of ferromolybdenum from molybdenite concentrate, and more particularly, a manufacturing method of ferromolybdenum with copper content of 0.5% or less from molybdenite with high copper content without carrying out a separate copper removing process by putting molybdenite, aluminum metal and iron metal, in a heating furnace and reacting them at high temperature to manufacture the ferro molybdenum at the lower portion thereof, forming a slag using aluminum sulfide and iron sulfide as the main components at the upper portion thereof, and putting most of the copper (80 to 95%) existing in the molybdenite in a slag layer. The exemplary embodiment can shorten a process as compared to a metallothermic reduction (Thermit) method of the related art and reduce the consumption of a reducing agent, i.e., aluminum.
摘要:
The present invention relates to a method for manufacturing a sintered ferromolybdenum alloy, in which a mixed powder of a mill scale (a mixture of Fe, FeO and Fe2O3) as a ferrous raw material discharged from a hot rolling and forging process of the steel-making process and a molybdenum oxide powder as a molybdenum raw material is primarily reduced with a hydrogen gas at low temperature, and then is secondarily reduced with the hydrogen gas at high temperature and simultaneously is cooled in a hydrogen atmosphere to thereby obtain a ferromolybdenum alloy in the form of a powder, and subsequently the obtained ferromolybdenum alloy powder is mixed with wax (Kenolube P11) and the wax-containing mixture is compacted or pressure-molded, after which the molded product is heat-treated in a hydrogen gas atmosphere and then is cooled, thereby manufacturing a sintered ferromolybdenum alloy, and a sintered product manufactured by said method.
摘要翻译:本发明涉及一种烧结锰铁合金的制造方法,其特征在于,将从所述钢 - 铁合金的热轧和锻造工序排出的作为铁原料的铁粉(Fe,FeO,Fe 2 O 3的混合物) 作为钼原料的钼氧化物粉末主要在低温下用氢气还原,然后在高温下用氢气二次还原,同时在氢气氛中冷却,从而得到铁钼合金 将粉末形式,随后将所得的钼合金粉末与蜡(Kenolube P11)混合,将含蜡混合物压实或压模,然后在氢气气氛中对成型体进行热处理,然后 冷却,从而制造烧结的钼钼合金,以及通过所述方法制造的烧结产品。
摘要:
A refrigerator is provided, by which cold air can be effectively prevented from leaking from a storage room. The refrigerator includes a refrigerator body having an opening and a storage room provided therein, a door closing/opening, a sealing part provided to at least one of the door and the refrigerator body to prevent a cold air from leaking from the storage room, and a flow cutoff part provided inside the sealing part to prevent the cold air flowing toward the sealing part from the storage room. Accordingly, by cutting of the cold air leakage together with the sealing part, energy efficiency of the refrigerator can be raised.
摘要:
A method of physicochemical leaching valuable metals is able to increase the leaching rate of nickel and magnesium contained in laterites, nickel ores, with a low concentration acid solution by using mechano-chemical effect. That is a method to add external energy to laterites containing nickel and magnesium to physically disintegrate their crystals and exposure nickels captured inside of the crystals to leach nickel and magnesium with a low concentration acid solution. It is a useful method to solve conventional problems such as the high energy cost of pyrometallurgical treatment and excessive use of strong acids of hydrometallurgical method.
摘要:
Disclosed herein is an ethylene-propylene-diene EPDM rubber composition with improved adhesion properties. The ethylene-propylene-diene rubber composition comprises an EPDM rubber, a crystalline polyolefin, and a polyolefin containing at least one carbonyl group (—C═O) within the structure as an adhesion improver. The ethylene-propylene-diene rubber composition improves adhesion to a polar polymeric material. Specifically, the EPDM rubber composition comprises 100 phr of an EPDM rubber, 5˜40 phr of a polyolefin containing at least one carbonyl group and 10˜30 phr of a crystalline polyolefin resin.
摘要:
A cooling air supply apparatus includes: a blowing fan attached at a rear wall face of a freezing chamber and forcefully circulating air cooled while passing an evaporator of a freezing cycle; a supply passage formed at a barrier partitioning the freezing chamber and a cooling chamber and supplying cooling air ventilated from the blowing fan to the cooling chamber; a rear guide passage branched from the cooling air passage and guiding cooling air backwardly of the cooling chamber; a right guide passage branched from the cooling air supply passage and guiding cooling air rightwardly of the cooling chamber; and a left guide passage branched from the cooling air supply passage, having the same diameter as that of the right guide passage and guiding cooling air leftwardly of the cooling chamber. Since a half of cooling air is guided from the supply passage to the rear guide passage and one-fourth of cooling air is respectively supplied to the right guide passage and the left guide passage, the cooling air distribution in the whole cooling chamber can be uniform. In addition, when a load occurs partially as food, or the like, is received into the freezing chamber, cooling air is concentratively discharged to the portion where the load occurs, so that a cooling operation can be quickly performed.
摘要:
A cooling air circulating device of a refrigerator is provided. According to the cooling air circulating device, it is possible to impartially cool a chilling chamber and to make the spread of temperature of the chilling chamber uniform by letting cooling air sucked up into the respective cells divided by shelves of the chilling chamber. Also, it is possible to rapidly cool the chilling chamber and to reduce time for cooling the chilling chamber by minimizing time, for which the cooling air whose temperature has risen above a predetermined temperature stays in the chilling chamber. A cooling air circulating device of a refrigerator includes a cooling air supply path formed on one side of a mullion wall for separating a freezing chamber from the chilling chamber, the cooling air supply path for supplying cooling air to the chilling chamber, a discharge duct connected to the cooling air supply path, the discharge duct for discharging the cooling air to the chilling chamber, and a cooling air suction duct formed on one surface or both surfaces of the chilling chamber, the cooling air suction duct for sucking up the cooling air that completed a cooling operation while circulating in the chilling chamber.
摘要:
A cooling air supplying device of a refrigerator is provided. According to the cooling air supplying device, it is possible to supply cooling air to the respective cells divided by shelves of a chilling chamber, to thus impartially supply the cooling air to the chilling chamber. Accordingly, it is possible to uniformly maintain the spread of temperature of the chilling chamber. The cooling air supplying device of the refrigerator includes a cooling air supply path formed in the upper portion of a mullion wall for separating a freezing chamber from the chilling chamber, the cooling air supply path for supplying the cooling air blown from a blast fan arranged in the freezing chamber to the chilling chamber, a discharge duct connected to the cooling air supply path and installed in the upper portion of the chilling chamber, the discharge duct for discharging the cooling air from the upper portion of the chilling chamber, cooling air guide channels connected to the discharge duct, the cooling air guide channels for guiding the cooling air to one side or both sides of the chilling chamber, and cooling air discharge units connected to the cooling air guide channels and formed on one side surface or the both side surfaces of a main frame, the cooling air discharge units for discharging the cooling air from the side surface of the chilling chamber into the respective cells divided by the shelves.
摘要:
A cooling air supply apparatus of a refrigerator that is capable of uniformly supplying cooling air to all food received in a receiving box is disclosed. The refrigerator includes a refrigerating compartment and a freezing compartment for storing food at low temperature, a barrier for partitioning the refrigerating compartment and the freezing compartment from each other, and a receiving box mounted in the refrigerating compartment for receiving food. The cooling air supply apparatus includes a communication port formed through the barrier for guiding cooling air from the freezing compartment into the refrigerating compartment, and a hollow box-shaped cover mounted at the top part of the receiving box. The cover is provided at one side thereof with an introduction port, which communicates with the communication port. The cover is provided at the lower part thereof with at least one cooling air supplying hole, which communicates with the interior of the receiving box.