225 results about "Reverberatory furnace" patented technology

The invention provides a method for extracting indium from indium-rich smoke dust by using an oxygen pressure technology. The method is characterized by comprising the following steps of: carrying out leaching indium extraction of the difficult-to-handle indium-rich smoke dust of a Pb-Sn reverberatory furnace by adopting a wet-process metallurgical oxygen pressure acid leaching technology, and highly enriching and recycling valuable metals in the raw material; and purifying to remove impurities of leachate, and carrying out extraction, replacement and electrolytic refining, thereby obtaining greater than 99.995% of electrical indium products. The technology method has the advantages that the indium leaching rate of the indium-rich smoke dust of the Pb-Sb reverberatory furnace and the enrichment rate of the valuable metals can be obviously increased, and the comprehensive recycling effect can be achieved, thereby waster water of indium smelting can be discharged up to the standard after being processed with low cost, the environmental pollution in the indium extraction process is eliminated. In the process, the leaching rate of the indium is more than 97%, leaching residues containless than 0.01% of indium, the enrichment rate of plumbum, tin, bismuth and zinc is more than 98%, the quality of refined indium products is more than 99.995%, and plumbum enriching slag containing greater than 60% of Pd is obtained. The technical scheme can independently form a system, can also be used for improving and perfecting old technologies and has higher popularization and application value.

An apparatus and method for reclaiming contaminated scrap metal, more particularly an improved reverberatory furnace designed for melting scrap. The amount of hydrocarbons volatilized from the melting of contaminated scrap is measured and the fumes are passed into the main hearth for burning. As the amount of fuel value contained within the fumes increases, the amount of fuel provided to the burner is proportionally reduced while the amount of oxygen is kept constant. This will ensure that the amount of fuel and the amount of oxygen present within the furnace is completely burned without excessive free oxygen or unburned fuel building up within the furnace or furnace exhaust. The burner will be operating under lean fuel conditions or under fuel rich conditions such that the flame temperature is lower than at stoichiometric firing, whereby the burners create reduced NOx.

The invention relates to an ultra-fine grain aluminum alloy gold welding wire and a preparation method of the ultra-fine grain aluminum alloy gold welding wire. The ultra-fine grain aluminum alloy gold welding wire includes the following components: SC 0.05%-0.8%, Er 0.05%-0.6%, misch metal 0.01%-0.8%, B 0.01%-0.5%, Ti 0.1%-0.3%, Cr 0.05%-0.4%, Zr 0.05%-0.2%, Mn 0.1%-0.6%, Zn 0.2%-1.0%, Mg 4%-8%, and the rest is Al. The preparation method is as follows: adding an aluminum ingot or the molten aluminum into a semi-closed reverberatory furnace firstly; adding Mn, Ti, Zr, Cr and Zn; adding B and the misch metal; conducting the furnace refining on the alloy melt; slagging the alloy melt after the refining; pressing Mg into the alloy melt after stewing; adjusting the temperature of the melt for standby; pouring the melt in an electromagnetic continuous casting machine; preparing an aluminum alloy ingot casting; lifting up the aluminum alloy ingot casting for homogenizing annealing and scalping for standby; putting the aluminum alloy ingot casting into an extrusion die for extrusion, extruding an aluminum alloy wire disc; and conducting wire drawing till the specification and the diameter reach the standard and using. The ultra-fine grain aluminum alloy gold welding wire can effectively improve the structural strength of a welding structure and the welding performance, and overcomes the welding defects of the low strength of an aluminum alloy welding joint and welding cracks.

The invention relates to a process for smelting tin-lead alloy by tin enriched slag reduction and a reduction-smelting reflecting furnace, which belong to the technical field of smelting of tin-lead alloy. The process adopts discontinuous type smelting operation, is carried out by furnaces and comprises the operation processes of furnace baking, mixing, charging, reduction smelting and tin-lead alloy placing and slag discharging. The fuel of the reduction-smelting reflecting furnace is changed into bituminous coal from diesel oil, and an air pipe of the reduction-smelting reflecting furnace, which is connected between a blower and a furnace body, form an air preheating return stroke around the outer wall of a flue; a combustion chamber is added to a furnace body, and an inverted arch furnace bottom, a furnace wall and a furnace top above a furnace bottom packing layer in a hearth are rebuilt; a brick body of the slag line part is changed into a chrome-magnesite brick from a high-aluminum brick, the depth of a smelting pool is reduced to 280-460mm from 510mm, and the clearance height of the hearth is lowered to 600-1,000mm from 1,040mm. The invention smelts the tin enriched slag by the reduction-smelting reflecting furnace and obviously reduces cost.

The invention relates to a smelting process for an aluminum-silicon master alloy. 75 percent of industrial pure aluminum ingot with the aluminum content being more than or equal to 99.7 percent and 12.5 to 13 percent of 6063 aluminum remelted regenerable ingot, which are measured according to a weight percent, are added into a reverberatory furnace at the temperature of 1000 to 1200 DEG C, 12 to 12.5 percent of well-measured pure silicon is added into the reverberatory furnace after the ingot is completely smelted to generate aluminum-silicon master alloy melt, and the aluminum-silicon master alloy melt is made into the aluminum-silicon master alloy through a smelting technique, a casting technique and a sawing technique. On the premise of not increasing equipment investment, the existing aluminum alloy smelting reverberatory furnace with an environment-friendly device system, a deep well and a casting system capable of continuously casting multiple cylindrical ingots at a time are used for smelting and casting the aluminum-silicon master alloy cylindrical ingot so as to substitute a traditional outdated production technique of the aluminum-silicon master alloy adopting a small-sized ground furnace to smelt and adopting a manual pouring way and an automatic cooling way of ingot molds, so that the energy can be saved, the environment can be protected, the production efficiency can be greatly improved, the labor intensity can be alleviated, the balance of silicon content in the aluminum-silicon master alloy and adequate chemical combination of aluminum and silicon as well as refining of the crystal grains can be better guaranteed, and the transformation, upgrading and development of enterprises can be promoted.

The invention discloses a process for recovering old and useless lead-acid storage batteries, comprising the steps of dismantling of a storage battery, processing of waste liquid, shell processing, smelting of coarse lead, deslagging of cast ingots, sedimentation of swirling flow, collecting and dust removal, dust removal of water film, etc. The invent adopts a marble acidproof and leakproof sewage pool for dealing with waste water, so the acid liquor can not permeate into and contaminate the earth; the smelting of coarse lead and deslagging of cast ingots are carried out by using a coal gas producer for gas combustion, with a plurality of coal gas nozzles providing enough fire to thoroughly smelt lead containing materials. The coal gas nozzles are arranged in the front of a reverberator the rear end of which is provided with an air exhaust opening to move the fire in the front constantly backward to thoroughly smelt lead containing materials at the back, thereby saving energy resource; a flue is formed in a S-shape, so the gas stays for a long time in the flue with a good sedimentation effect; as cloth-bag dust removal followed by the dust removal of water film is adopted, the dust is completely removed, so the discharged gas causes no pollution to the atmosphere. The invention has a perfect processing which leads to no secondary pollution to the environment.

A conticasting-tandem rolling technology for manufacturing copper rod with rejected copper material features that the molten copper top is arranged on the back of reflection furnace for shortening the flow launder, the molten copper is tapped at lower temp for improving its quality, the volume of cast strand is increased for shortening the casting time and decreasing electric consumption, the 14 passes of rolling frame is decreased to 12 passes for higher quality, and gas instead of coal is used as fuel for less pollution.

The invention discloses a semi-vertical reverberatory furnace for preparing sodium sulfide and a technique thereof. The semi-vertical reverberatory furnace comprises a combustion chamber, a forehearth part, a vertical furnace and an aeration tower. The technique comprises the following steps: anhydrous sodium sulphate or glauber salt and pulverized anthracite are briquetted and then put into the semi-vertical reverberatory furnace; by utilizing reaction waste heat, the pallets flow through a packing layer and then enter the forehearth part in a melting state; fused mass of the forehearth part is heated by the combustion chamber, and the reaction is finished; and the steps of leaching, filtering, evaporating and concentrating are carried out after the reaction is finished so as to obtain the product, namely industrial sodium sulfide. Compared with the reverberatory furnace and the converter in the traditional process, as tail gas is adopted to heat and melt solid materials, the coal consumption for annealing and reducing is reduced by more than 25 percent; and compared with the common short convertor, the invention has the advantages of low coal consumption, less investment, easy maintenance, pollution reduction, high mechanization degree and continuous production.

The invention discloses a method for removing impurity during copper and a copper alloy melting process, which comprises the following steps: 1)a micro oxidation phase: introducing oxygen in a copper and copper alloy melt in a cored induction melting furnace, or a coreless induction melting furnace, or a shaft furnace, or a reverberatory furnace, or adding one or more from CuO, MnO2 and KMnO4 as an oxidizing agent for a slagging reaction; 2)a micro reduction phase: using one or more from metal Mg, Cr, Zr, B as a reducing agent, reducing and recovering the valuable metals in the oxidation process; and 3)a harmful impurity element harmlessness processing phase; adding one or more from Li, Ca, Zr, Mn for removing harmful impurity. The method can use the raw materials with low cost and low quality, or uses the outshot which has standard-exceeding impurity and harmful element, a simple micro oxidation-micro reduction-harmlessness processing is carried out on the current cored induction melting furnace, the coreless induction furnace or the shaft furnace, so that products with high quality can be produced.

The invention discloses an Al-Mg alloy welding wire and a preparation method thereof. The composition of the welding wire is as follows in percentage by weight: magnesium: 4.5 to 5.5, chromium: 0.05 to 0.20, manganese: 0.05 to 0.20, titanium: 0.06 to 0.20, beryllium: 0.0001 - 0.0003, yttrium: 0.03 - 0.15, and the balance aluminum. The preparation method is as follows: after an aluminum ingot is added into a gas reverberatory furnace, a magnesium ingot is added in, melted and a reside-crash agent is added for deslagging; and then AlCr10, Mn99, AlTi10, AlBE3 and AlY10 are added in; after 35min, a refining agent is added under an argon protection state, a refining product stays still for 30min and is horizontally and continuously cast into an aluminum alloy wire rod; and after a plurality of times of drawing, the refining product is processed into continuous discoid welding wires with various specifications. Compared with the prior art, the invention has simple preparation method, easily controlled operation and little volatilization, oxidation or burning in melting; and the prepared welding wire has good welding toughness, strength and thermal crack resistance.

The invention relates to a method for directly separating antimony and arsenic from flue dust containing the antimony and the arsenic. The method is characterized in that: the flue dust containing the antimony and the arsenic is conveyed in a reverberatory furnace and is separated to obtain arsenic trioxide and antimony trioxide by using temperature difference; the temperature for separating the arsenic trioxide is 680 DEG C; the arsenic trioxide passes through a air discharge cooling apparatus, and is insufflated in a bag chamber through a fan and collected; the remaining antimony raw material is heated to a temperature of 850 DEG C to carry out a reduction reaction to collect the antimony trioxide. According to the present invention, the collection efficiency of the arsenic trioxide is 98-98.5%, and the collection efficiency of the antimony trioxide is 98-99.8%; the smelting process method is simple; production investment is less; factory constructing and commissioning are quick.

The present invention relates to a device for feeding shredder dust to a furnace such as a reverberatory furnace. This device comprises a feeding chute that passes to the inside of the reverberatory furnace and is fitted to the ceiling of the reverberatory furnace. Shredder dust can be fed from this feeding chute which also allows oxygen enriched air to be supplied to the feeding chute and fed to the inside of the reverberatory furnace. Further, the present invention relates to a reverberatory furnace in which a burner is able to be installed in a wall portion of one end side thereof. A plurality of feeding ports to which are connected the feeding chutes of the shredder dust feeding devices are provided at the one end side in the ceiling portion thereof forming a plurality of staggered rows facing the other end side.

The invention relates to a method for recovering antimony from antimonyoxychloride, which comprises the steps of furnace drying, reducing and smelting, coarse antimony refining and casting. The method is characterized in that in the step of reducing and smelting, antimonyoxychloride slag, soda ash, lime and solid carbon are mixed in a certain proportion, the mixture is added into a reverberatory furnace batch by batch, the temperature of the furnace is raised to 1,100 to 1,200 DEG C, the smelting time of each batch is 8 to 12 hours and the pressure in the furnace is kept between 20 and 50Pa. The step of coarse antimony refining comprises adding ammonium dihydrogen phosphate to remove lead, adding sulfur to remove copper and iron and alkaline refining, namely adding ammonium dihydrogen phosphate to remove lead according to a conventional method first, then adding antimony sulfide or sodium sulfide according to copper and iron content to remove the copper and iron, and finally adding soda ash and introducing compressed air to remove arsenic, copper, iron and sulfur and the like. Compared with the prior art, the method has the advantages of short process flow, relatively low cost and over 94 percent of antimony recovery rate.

The invention relates to a method for regulating oxygen atmosphere in a fuel oil (gas) reverberatory furnace by using recovered fume. The method is implemented by a reverberatory furnace regulating the fuel oil (gas) by using the recovered fume. The reverberatory furnace regulating the fuel oil (gas) by using the recovered fume comprises a furnace body 1, a nozzle, heat accumulators (7 and 8), fume pipelines (18 and 19), a reversing adjusting valve 15, an air blower 13 and the like, and is characterized in that: a fume recovering pipeline with a fume adjusting valve is arranged between a heat accumulator A (7) and a heat accumulator B (8) and regulates the oxygen atmosphere in a combustion chamber of a reaction furnace by using the recovered fume to ensure that the oxygen is fully burned; a pipeline arranged between low-temperature pipelines below the heat accumulators is a low-temperature fume recovering pipeline (20); a pipeline arranged between high-temperature pipelines above the heat accumulators is a high-temperature fume recovering pipeline; and the oxygen atmosphere in the combustion chamber can be regulated by one of the low-temperature fume recovering pipeline and the high-temperature fume recovering pipeline as required.

The production process of high purity magnesia monocrystal with magenesite ore of 35-44 % purity includes baking in reverberatory furnace to obtain light burnt magnesia, cooling and ball milling, digesting via adding water andp umping to carbonating pressure tank, adding water and CO2 gas while maintaining the temperature, stirring to slight acid, filtering before and after adding purifying agent in a storage tank, decomposing with hot vapor and separating deposit; filtering, depositing and stoving to obtain light magnesia; pressing to form balls and incineration to obtain heavy magnesia monocrystal material; crushing and sintering at high temperature and high pressure to obtain magnesia monocrystal.

The invention discloses a one-step technique for separating antimony from gold and lead in gold-containing antimony oxide smoke dust, which comprises the following steps: adding a reducer into antimony oxide smoke dust with the gold content of 30g/t, carrying out reduction smelting at 1000-1250 DEG C, removing scum, blowing air or oxygen from the side of a reverberatory furnace at the rate of 50-250 m<3>/minute, converting at the converting temperature of 700-700 DEG C so that the antimony is oxidated and volatilized in the form of antimony oxide and the gold and lead are settled in a concentrated bottom water antimony solution, and obtaining the antimony oxide (in which the gold content is at most 0.5g/t, the lead content is at most 0.5 wt% and the antimony content is at least 73 wt%) and the bottom water antimony solution (in which the gold content is 80-150g/t, the lead content is 8-15 wt% and the antimony content is 84-89 wt%), thereby implementing one-step separation of the antimony from the gold and lead. The technique implements one-step separation of gold and lead in the antimony smelting process, and is suitable for industrial production.

This invention provides a coal burning furnace and additive in the domain of heat engineering. There is heat protection layer outside the furnace and the far IR reflection layer inside the furnace. The under-part of the inside furnace sets grate and the up-part forms the burning coal layer. The under-part and inside furnace consist the gas-supplying waste-out tune and the up-part of the burning coal layer forms burning heat supplying tune. The burning coal additive is added to the burning coal. The heat protection layer outside the furnace protects heat well and the inside far IR reflection layer can reflect the transferring heat to radiation heat so as to improve the heat utilization. The additive of the burning coal can let the coal burn efficiently and improve the burning rate and heat productivity. This furnace can be used to the industrial burning coal sinter, bake and calcinations.

The invention relates to a light burning system of magnesite, particularly to a magnesite light burning system and a light burning method in the refractory industry. The magnesite light burning system comprises an ore crushing and grinding system which sends ores into a calcinator system through material-charging and conveying equipment. The calcinator system, connected to a fuel supply system, outputs lightly-burnt magnesia powders by material-discharging and conveying equipment. The system of the invention has the advantages of: low heat consumption, with 44%-56% energy saved compared with a reverberatory furnace; great capacity of production; lower dust concentration of less than or equal to 50mg/Nm3 in exhaust emissions, about 90%-95% lower than the dust concentration of a reverberatory furnace; good quality of products; low labor intensity; high labor productivity which is more than 49 times of the productivity of a reverberatory furnace; high utilization of magnesite, for a reverberatory furnace only being capable of lightly burning lump ore materials, but a gaseous suspension calcinator, a fluidized flash calcinator or a circulating calcinatory being able to lightly burn fine ore materials.

The invention discloses a method for carrying out pyrogenic attack to arsenic alkali slag by using the prior antimony smelting reverberatory furnace. The method is characterized by comprising the following steps: the arsenic alkali slag is crushed and is added with oxygen in the reverberatory furnace and is melted down and stirred; NaOH is added to alloy liquid for removing arsenic; and a deleading agent is added to the alloy liquid for removing lead. The method has simple process flow, is easy to control the operating condition, can totally convert the arsenic alkali slag into a useful product for utilization or selling; the reclaiming rates of antimony and arsenic reach over 99 percent; the reclaiming rate of lead is close to 100 percent; and the method has remarkable economic benefit and environmental benefit.