38results about How to "Lower the smelting temperature" patented technology

The invention discloses a method for preparing calcium carbide, which comprises the following steps: pyrolyzing junked tires to obtain high-temperature oil gas, iron wires and tire carbon black; mixing the tire carbon black with a calcium-base raw material to obtain a mixture; forming the mixture to obtain a massive furnace raw material; and smelting the massive furnace raw material in an arc furnace to obtain the calcium carbide. The technique can obviously lower the temperature and energy consumption, thereby lowering the production cost of the calcium carbide.

The invention discloses a waste diachylon desulphurization method which comprises the following steps: A, adding waste lead-acid storage batteries into crushing and sorting system equipment to carry out crushing and sorting; B, drying sorted diachylon at a temperature of 120 DEG C for later use; C, carrying out grinding and screening on the dried diachylon; D, adding diachylon particles with the uniform size, which are obtained in the step C, into a canned reactor, then adding a desulfurizer and water and stirring to perform the reaction for certain time; E, transporting a mixture in a can, which is obtained after reaction, to a filter press to carry out filter pressing and carrying out separation to obtain a diachylon cake and a filtrate. The method disclosed by the invention has a high lead recovery rate, is low in cost, has low energy consumption and is short in time consumption.

The invention provides a method for extracting bismuth from low temperature caustic fusion bismuth refined ores. In the method, under conditions of the low temperature of between 600 and 900 DEG C and the alkalinity, crude bismuth is extracted from bismuth refined ores by smelting and fusion, and sodium carbonate is leached out by ball-milling slag and sulphonium. The method comprises main steps of the caustic fusion, the milling-leaching and the regeneration of alkali. Due to the adoption of the caustic fusion, the method of has the advantages that the temperature of smelting bismuth is greatly lowered, iron filings and reduction coal are not necessary to add, and particularly low-priced sodium carbonate replaces the majority of sodium hydroxide which lowers smelting cost; directly smelting crude bismuth and regenerating sodium hydroxide greatly simplify the whole process and improve the recovery rate, and the environmental pollution of sulfur dioxide is eliminated. The method is very important to the bismuth smelting and the energy conservation and emission reduction.

The invention discloses a low-temperature fused salt clean smelting method for tin, which is to produce coarse tin by one step of placing tin concentrate or tin-containing material in sodium fused salt for low-temperature reduction smelting. The smelted product also comprises unreacted solid materials such as a gangue component and generated solid products. After the reaction is finished, a major part of inert fused salt separated from the solid materials is returned to a smelting process in a hot state, and the minor part of inert fused salt bonded with the solid materials is recycled after being treated by a wet process. The solid materials obtained after removing the fused slat by dissolving can be treated for recovering valuable metals. The method greatly lowers a tin smelting temperature, can produce coarse tin by one step, solve a tin-iron separation problem, shorten a process flow, reduce cost, greatly improve tin recovery rate and is a new low-carbon, clean and high-efficiency tin smelting method.

A process for prepairng the deoxidant used in steel-smelting procedure includes such steps as proportioning the raw ores, adding carbon as reductor, crushing, continuously loading to horizontal reverberatory furnace, heating to 1300-1450 deg.C by spraying heavy oil and air or oxygen-enriched air into the furnace for 25-100 min, and continuously discharging the finished deoxidant. A composite rare-earth deoxidant prepared by said process contains Fe (20-60%), Al (5-20), Si (2-15), Ca (5-25), Mn (1-15), Ba (0-25) and Re (3-20).

The invention discloses a crude zinc smelting method and a smelting kiln used thereby. The method comprises the following steps: a pyrometallury technique is adopted for smelting and the smelting steps comprise loading, preheating, high-temperature smelting and condensing; the smelting kiln is internally provided with a preheating section, a high-temperature smelting section and a condenser; the raw materials are loaded into the smelting kiln by a feed inlet of the smelting kiln, and then enter the high-temperature smelting section for heating after the preheating section is preheated, and thegenerated zinc steam enters the condenser for condensation; the condensed waste gas enters the preheating section to preheat the raw material, and is exhausted out the smelting kiln by a gas outlet arranged on the smelting kiln, and the waste gas uses a cloth bag for removing dust; and the zinc solution generated by condensation is discharged to a zinc storing tank by a liquid outlet arranged onthe smelting kiln, and the waste residue is discharged out the smelting kiln by a spiral residue-discharging device arranged at the tail part of the smelting kiln. The invention is characterized by small occupied area, large yield, high heat utilization ratio, high recovery ratio, low production cost, capability of treating various renewable zinc ash raw materials and the like, not only is suitable for crude zinc smelting, but also is suitable for smelting other similar non-ferrous metals.

The invention relates to a low-temperature fused salt electrolytic cleaning metallurgy method and device for antimony. The method comprises the steps that antimony-containing materials and inert molten salt are mixed and arranged in a low-temperature fused salt electrolyzer in a certain material arrangement mode, and low-temperature fused salt electrolytic smelting is conducted under the certain temperature and pulse current conditions. Along with low-temperature fused salt electrolysis, mixed molten salt in a hearth gradually forms a three-layer melt structure. The antimony-containing materials can be added from an antimony-containing material charging port, and obtained liquid antimony can be discharged from an antimony discharging port formed in the lower portion. Accordingly, the existing antimony concentrate pyrogenic attack temperature is greatly lowered, and high-grade antimony is produced through one step; compared with an existing antimony concentrate pyrometallurgy technology, the method has the advantages of being low in energy consumption, high in direct recovery rate of antimony, clean and environmentally friendly. The device is simple and practical, and a good antimony extraction metallurgy effect can be obtained by using the device in a matched mode.

The invention provides a method for preparing calcium carbide. The method comprises the steps that raw coal is subjected to drying processing, and dry raw coal is obtained conveniently; the dry raw coal and lime are subjected to smashing respectively, so that raw coal powder and lime powder are obtained conveniently; excess raw coal powder and the lime powder are mixed, so that mixed materials are obtained conveniently; the mixed materials are subjected to ball pressing, so that palletizing materials are obtained conveniently; the palletizing materials are subjected to pyrolysis treatment, so that artificial petroleum, artificial natural gas and pyrolysis solid products are obtained conveniently, wherein the pyrolysis solid products have semicoke and lime; the pyrolysis solid products are conveyed into a burning bin for burning processing in a hot mode, so that pyrolysis solid is obtained conveniently; and the pyrolysis solid is conveyed into a sealed electric furnace for smelting processing, and the calcium carbide is obtained conveniently. According to the method, smelting energy loss and production cost can be lowered obviously, and meanwhile calcium carbide production efficiency can be further improved.

The invention provides an ilmenite treatment method. The method comprises the following steps: roasting ilmenite in an oxidizing atmosphere to obtain oxidized titanium-iron mixed ore; mixing the oxidized titanium-iron mixed ore with pulverized coal, controlling the temperature to be 1050 DEG C to 1150 DEG C, carrying out magnetizing roasting for 1.5 hours to 2.5 hours, and obtaining reduced titanium-iron mixed ore after the magnetizing roasting is finished; and carrying out ball milling and magnetic separation on the reduced titanium-iron mixed ore, and obtaining iron ore concentrate powder and titanium slag. The treatment method is short in flow, convenient to operate and capable of realizing industrial production easily. Meanwhile, the treatment method is low in energy consumption, low in smelting temperature, small in pollution and environmentally friendly.

The embodiment of the invention discloses an environment-friendly ferrochrome smelting furnace burden and a preparation method thereof in the technical field of ferrochrome smelting. The environment-friendly ferrochrome smelting furnace burden comprises chromium ore powder, coke, serpentine, silica, bluestone and return slag; and the return slag comprises a tundish, furnace slag and iron oxide, wherein the furnace slag and the iron oxide are stored between the tundish and an iron outlet. According to the furnace burden and the method, the iron oxide is added into the furnace burden, so that the melting point of the furnace slag is lowered, and the flowability of the furnace slag is improved; the iron oxide is added into the furnace burden, so that the reducing capacity of the furnace burden is enhanced, and the chromium ore reducing speed is increased; and the iron oxide is added into the furnace burden, so that the activity of the furnace burden is enhanced, the viscosity of the furnace slag is reduced, the slag-metal separation effect is good, and the product purity is high.