47results about How to "Reduce soot rate" patented technology

The invention discloses an ultrafine lead oxide prepared by using a waste lead plaster and a preparation method thereof. The preparation method comprises the following steps of: carrying out desulphurization process by mixing the waste lead plaster with an aqueous solution containing a composite desulfurizer for reaction; carrying out filtration to remove the desulphurization filtering solution to obtain the desulfurated lead plaster (filter residue); carrying out a leaching and crystal transformation process by adding a citric acid solution and a reducing agent into the desulfurated lead plaster obtained in the process, and carrying out filtration, washing, and drying to obtain the lead citrate after the desulfurated lead plaster reacts with the citric acid solution; carrying out a roasting process by roasting the lead citrate to obtain the ultrafine lead oxide. According to the preparation method disclosed by the invention, the ultrafine lead oxide is prepared from the waste lead storage lead plaster; a two-step leaching process is adopted; the filtering solution is simple in ingredient and can be recycled; a side product is recycled from the desulphurization solution. The preparation method disclosed by the invention is low in energy consumption, simple in equipment, high in lead recycling rate, and high in ultrafine lead product quality, and has the characteristics of good resource recycling effect, environmentally-friendly and pollution-free production process, and capability of clean production.

The invention discloses ultrafine lead oxide prepared from desulfurated lead plaster by means of three-stage process and a method for preparing the ultrafine lead oxide. The method comprises the following steps of: carrying out a desulfurization and lead plaster acid leaching process by causing the desulfurated lead plaster to react with acid, simultaneously adding a reducing agent, and carrying out solid-liquid separation after the reaction is ended to obtain a plumbic acid containing solution; carrying out a lead carbonate preparation process by causing the plumbic acid containing solution to react with sodium carbonate, carrying out solid-liquid separation, washing and drying to obtain the lead carbonate; carrying out a roasting process by preparing the ultrafine lead carbonate by roasting the lead carbonate, wherein the ultrafine lead oxide can be PbO, Pb3O4, or the mixture of the PbO and the Pb3O4, the mean particle granularity of the ultrafine lead oxide is less than 2 mu m, and the nanocrystalline grain size is less than 500nm. Compared with the prior art, the preparation method of the ultrafine lead oxide disclosed by the invention has the following beneficial effects: the active material of the ultrafine lead oxide powder compound for the production of a storage battery enterprise can be directly prepared, lead volatilize quantity is small, the ash rate is low, the direct lead yield is high, the energy consumption is low, pollutants of sulfur dioxide and the like are not generated, and the like.

The invention belongs to the technical field of antimony smelting in the industry of non-ferrous metal metallurgy, and particularly relates to a technology and a device thereof adopting bottom blowing molten bath for antimony reduction and smelting in the process of antimony smelting, wherein the bottom blowing molten bath smelting technology is adopted, antimonial raw material and burden are uniformly blended according to a suitable proportion and fed into a molten bath antimony smelting furnace for smelting to carry out reduction and slag making reaction; oxygen, nitrogen, natural gas or coal gas are fed into the melt through a gas spray gun from the bottom part or bottom side part of the molten bath antimony smelting furnace; the gas is combusted to release heat, so as to ensure the temperature of the furnace, participate in the oxidation and reduction reaction of the burden, and vigorously blend the melt, as a result, the heat and mass transfer and reaction speed in the smelting furnace can be improved, the burden can be quickly reacted to produce lean antimony slag, crude antimony and flue gas, the antimony can be continuously processed, and the slag type with little corrosion on the refractory material is produced. The technology and the device have the advantages of low investment, energy consumption and cost, high automation degree and environmental protection.

The invention discloses a method and device for preparing crude silver alloy through anode slime. According to the method for preparing crude silver alloy through anode slime, the anode slime is used as the raw material, and the crude silver alloy with the silver content being 80-95 wt% is obtained after the steps of pelletizing, charging and melting, slagging and emission, oxidizing slagging and crude silver alloy discharging. The device is a side-top-combined smelting converter which comprises a plurality of side blowing spray guns (1), a plurality of top blowing spray guns (2), a discharging opening (3), a feed inlet (4), a converter body (5), two rotating racks (6) and a smoke duct (7). According to the method for preparing the crude silver alloy through the anode slime, reduction smelting and oxidizing refining are finished through the side-top-combined smelting converter; compared with traditional two furnaces, the heat efficiency is good, energy consumption is lowered by 20-40%, and cost is reduced; smelting time is shortened to be within 4 days from 6.5 days, and the smelting efficiency is improved; the crude silver alloy can be prepared without additional reducing agents and flux, operation is simple and convenient, and cost is reduced.

The invention discloses a lead skim reducing process, comprising the following steps: adding flux and fused lead skim into the hearth of a lead skim reducing furnace; heating the materials in the hearth by utilizing an electrode; spraying powder coal into the furnace from the bottom of the lead skim reducing furnace; and respectively discharging rough lead, waste slag and smoke from a lead discharging port, a slag tap and a smoke outlet. The reducing process of the invention has small needed powder coal amount, small smoke amount, low soot rate, high lead recovery rate and low cost.

The invention discloses a cyclone concentrate spray nozzle, which comprises a material conveying pipe, wherein a center oil gun is coaxially arranged in the material conveying pipe, an air chamber is fixedly arranged at the outer side of the material conveying pipe, and is in an inverted truncated cone shape, a cyclone bird nest water jacket for forming cyclonic air is fixedly arranged at the lower end of the air chamber, a material conveying pipe outer layer for providing cooling air is arranged at the outer side of the material conveying pipe, a cyclone pipe for forming cyclonic air is fixedly arranged at the lower ends of the material conveying pipe and the material conveying pipe outer layer, the cyclone bird nest water jacket is arranged at the outer side of the material conveying pipe, an air outlet is formed by a gap between the cyclone bird nest water jacket and the the material conveying pipe, the directions of rotary air formed by the cyclone bird nest water jacket and the cyclone pipe are the same, and a high-speed rotary flow field is formed at the combining part of a material outlet. The cyclone concentrate spray nozzle has the advantages that by arranging the two cyclone mechanisms, the two types of cyclonic air are combined, the concentrate and reaction gas can be fully mixed, and the smoke dust rate is reduced; by increasing the negative pressure value at the material outlet, the problems of air returning and material returning are effectively reduced, and the production capacity of concentrate feeding is improved.

The invention discloses a sintering combined oxygen-enriched side-blown smelting process of a vertical drying kiln in the technical field of environmental protection systems. The smelting process comprises the following steps of adding little lime and fine anthracite to copper and nickel-contained sludge, mixing the lime, the fine anthracite and the copper and nickel-contained sludge proportionally and stirring evenly to obtain a mixture; pelletizing the mixture by a pelletizer to obtain pellets, and adding the pellets evenly into the vertical drying kiln from a kiln crown by a feeding device,wherein the pellets move down by dead weight; adding obtained agglomerated cakes from the furnace top of an oxygen-enriched side-blown smelting furnace continuously together with inorganic hazardouswastes, such as waste anode scraps, quartz stone, limestone, non-ferrous metal smelting waste and incineration disposal residues; making obtained slag enter an electric slag cleaning furnace after theobtained slag is discharged from the oxygen-enriched side-blown smelting furnace, reheating and clarifying and separating the slag by the electric slag cleaning furnace, thereby clarifying and separating copper and nickel mechanically entrained in the slag once again, and discharging the slag from the electric slag cleaning furnace and performing water quenching to make the slag become water-quenched slag; and disposing generated flue gas by processes of waste heat recovery, shock chilling, bag dust collection, sulfur removal, denitration, fluorine and chlorine removal and the like, thereby realizing up-to-standard discharge.

The invention provides a drying device for metallurgical raw materials. The drying device comprises a separator and a vertical drying furnace, wherein a feeding device is mounted at a first feed opening of the vertical drying furnace; a gas inlet of the vertical drying furnace is connected with an external hot gas source; a gas outlet of the vertical drying furnace communicates with a gas inlet of the separator through a pipeline; a gas outlet in the top of the separator is connected with a flue; and a discharge opening in the bottom end of the separator communicates with a second feed opening in the lower part of the vertical drying furnace through a pipeline. According to the drying device for the metallurgical raw materials, the metallurgical raw materials are subjected to drying treatment in the vertical drying furnace through the hot air source and then are subjected to gas-solid two-phase separation in the separator, separated gas is discharged through the flue, and solid materials are discharged into the vertical drying furnace. The drying device is simple in design and convenient to operate and control, the drying effect of the metallurgical raw materials is very good, and metallurgical raw materials that are carried in the gas after drying are recycled to prolong the service life of follow-up dust removal equipment.

The invention discloses a process method for treatment of a nonferrous metal material through an energy-saving and environmental protection-type oxygen-rich smelting furnace. The method includes the following steps that (1) cement, lime and the nonferrous metal material are mixed to be blended, and then the mixed material is made to be in a block shape or pellet shape to obtain a block-shaped or pellet-shaped material; and (2) the obtained block-shaped or pellet-shaped material, limestone, quartz stone and coke or carbon buttons are added into the oxygen-rich smelting furnace to be smelted, oxygen-rich hot air is connected into the oxygen-rich smelting furnace in the smelting process, oxygen-rich concentration of the connected-in oxygen-rich hot air is adjusted through a distributed control system, a shell of the oxygen-rich smelting furnace is provided with a water jacket, the inner side of the water jacket is provided with a refractory concrete protecting layer, most rare and noble metals are gathered into crude metal after smelting is completed, and flue gas, cyclic collection flue gas, crude metal, soot and slag are obtained after smelting is over. By the adoption of the process method, smelting strength and smelting efficiency are high, the amount of flue gas is small, and energy saving and environmental protection can be realized.

The invention discloses a treatment device and a treatment process applied to furnace slag recycling. The treatment device is applied to treatment of copper sand. The treatment process mainly comprises the steps of 1, a smelting raw material preparation process, 2, a smelting process of copper matte and crude copper, 3, an acid-making process, and 4, an anode copper refining and electrolysis process. In the step 1, according to the requirement of furnace components, copper sand is mixed with limestone and fluorite solvents in a certain proportion to prepare a smelting raw material; in the step 2, the smelting raw material is smelted into the copper matte and the crude copper in sequence through a crude smelting furnace of an oxygen-enriched side-blown smelting furnace; in the step 3, heat exchange cooling, dust removal and pressurization are performed on flue gas generated by the oxygen-enriched side-blown smelting furnace by an acid-making system to prepare an acid product; and in the step 4, the crude copper is refined into anode copper through a refining furnace, and precious metal is electrolyzed and separated out through an electrolysis system. Therefore, the treatment process can be used for extracting high-purity precious metals such as copper, gold and silver from furnace slag generated after incineration of municipal solid waste so as to realize resourceful treatment of the furnace slag.

The invention discloses a modification method for a top-blowing smelting facility as well as a continuous copper smelting facility and method. The modification method for the top-blowing smelting facility comprises the following steps of removing a converter or a converting furnace of a top-blowing converting facility; reducing the hearth height of a top-blowing smelting furnace of the top-blowingsmelting facility; removing a single immersed top-blowing main spray gun of the top-blowing smelting furnace; arranging at least three top-blowing smelting spray guns on the top of the top-blowing smelting furnace at intervals; forming a copper matte draining hole in the top-blowing smelting furnace; removing an electrode and an electrode matching device of a settling electric furnace of the top-blowing smelting facility, and arranging at least three top-blowing smelting spray guns on the top of the settling instrument at intervals in order to modify the settling electric furnace into a top-blowing converting furnace; and connecting the copper matte draining hole of the top-blowing converting furnace with the copper matte inlet of the top-blowing converting furnace through a launder. Through adoption of the modification method for the top-blowing smelting facility, the existing top-blowing smelting facility can be utilized fully; the production of high-grade copper matte can be facilitated; conditions are created for continuous converting; and the investment cost of continuous copper smelting can be lowered.

The invention relates to an improved novel blast furnace. A base is built by heat resistant bricks, coarse lead discharging holes are formed in the base, the left side wall and the right side wall of the base are respectively formed by one group of upper water sleeves and one group of lower water sleeves, the adjacent upper water sleeves and lower water sleeves are communicated by water sleeve communicating pipes, two air inlet inclined pipes penetrate through each lower water sleeve, and each air inlet inclined pipe is communicated with an air inlet main pipe through one air inlet branch pipe. The front and back walls are respectively formed by two upper water sleeve doors, two middle water sleeve doors and a lower water sleeve door, an upper water sleeve door water outlet pipe is arranged on each upper water sleeve door, a middle water sleeve door water inlet pipe is arranged on each middle water sleeve door, the adjacent upper water sleeve doors and middle water sleeve doors are communicated through water sleeve doors, and each lower water sleeve door is provided with a lower water sleeve door water outlet pipe, a slag discharge pipe and a lower water sleeve door water inlet pipe. The upper part of the novel blast furnace is provided with a water sleeve frame, a water sleeve frame water outlet pipe and a water sleeve frame water inlet pipe are arranged on the water sleeve frame, a gas collecting cover is connected with the water sleeve frame through a connecting frame, and the upper end of the gas collecting cover is provided with an exhaust pipe.

The invention belongs to the technical field of metallurgy, and particularly relates to a method for efficiently removing fluorine-chlorine impurities in zinc oxide smoke. The method for efficiently removing the fluorine-chlorine impurities in the zinc oxide smoke comprises the following steps of (1) oxidization smelting, (2) reductive volatilization, and (3) furnace slag discharging. According to the method for efficiently removing the fluorine-chlorine impurities in the zinc oxide smoke, after acid-leached slag is subjected to oxidization smelting, the impurities such as fluorine, chlorine and sulfur in the zinc oxide smoke can be removed in the smelting stage, fluorine and chlorine in the zinc oxide smoke can be effectively removed, the treatment cost of the zinc oxide smoke is reduced, energy is saved, the purposes of environmental friendliness and comprehensive utilization of resources are achieved, and melting of the acid-leached slag is accelerated in the smelting stage; volatilization of valuable metal such as zinc is reduced while the impurities such as fluorine and chlorine are effectively removed; and the interior of a volatilization chamber is in a reducing atmosphere, a large amount of CO is generated, high reducibility is kept, the volatilization efficiency for lead and zinc is improved easily, and the recovery rate of the valuable metal is increased.

The invention discloses a copper smelting method capable of reducing dust content of flue gas by using a molten bath of an isa furnace. The method comprises the following steps: granulating a raw material, controlling the water content of granules at 8-9%, and feeding the granules, the water content of which is 8-9%, into the isa furnace to be smelted through a material guide pipe, wherein the material guide pipe enters from the top of a furnace body of the isa furnace, a discharge port of the material guide pipe is located in the middle of the furnace body, and a feed inlet of the material guide pipe is larger than the discharge port; inserting a spray gun into the isa furnace, blowing oxygen-enriched air into the molten bath in the isa furnace in a forced manner through the spray gun, and controlling the flow of the spray gun at 24000-25000 Nm<3>/h, wherein the spray gun is inserted to a position, 0.3-0.4 m, from the bottom end of the spray gun to a top opening of the furnace body ofthe isa furnace; and controlling the temperature of a melt in the isa furnace at 1140-1180 DEG C, wherein in the whole process, flue gas enters into an external flue gas system through a flue gas exhausting pipeline connected to the top of the furnace body of the isa furnace. Preferably, the material guide pipe comprises a feeding hopper and a discharging pipe, and the discharge port of the discharging pipe is located in the middle of the furnace body. The method has the advantage of being low in dust content of flue gas in a copper smelting process.

The invention discloses a fine-fraction high-silicon low-iron zinc concentrate fluidized bed roaster roasting treatment method. The roasting treatment method comprises the following steps of (1) feeding fine-fraction high-silicon low-iron zinc concentrate into a fluidized bed roaster through a thrower; (2) controlling roasting parameters of the fluidized bed roaster by controlling a fan in front of the roaster and a combustion fan, so that the zinc concentrate is subjected to low-temperature oxidizing roasting at the temperature of 850-920 DEG C on a fluidized bed layer, and products being roasted sand, smoke dust and flue gas; and (3) discharging the roasted sand from an overflow port of the fluidized bed roaster, cooling and ball-milling the roasted sand, then feeding the roasted sand into a roasted sand bin, enabling smoke dust and flue gas to sequentially pass through a waste heat boiler, vortex dust collection equipment and electric dust collection equipment for waste heat recovery and smoke dust collection, enabling the generated waste heat to enter a steam pocket, and enabling the collected smoke dust to enter the roasted sand bin. The content of soluble silicon in the roasted product can be effectively reduced, the smoke dust rate is effectively reduced, the burden of equipment such as the waste heat boiler, vortex dust collection and electric dust collection is reduced, and the labor intensity of workers is reduced.