42results about How to "Improve economic and technical indicators" patented technology

A quantification blow-in method for a blast furnace belongs to the technical field of blast furnace iron making. The blow-in process is divided into three phases, namely, a phase of forming a cohesivezone, a phase of taping adaptation, and a phase of mine batch and heavier load. Control standards for the phases and parameters of the blow-in process of the blast furnace are quantified, therefore,important jobs and quantification principles of the respective phase in the blow-in process can be defined. With a wind-adding curve as a core and in combination with actual conditions of blast furnace blow-in, the quantification blow-in technology details the parameters of the blow-in process; in addition, the practice of the technology in the blast furnace also shows that main parameters in theactual blow-in process conforms to the plan, and the blow-in process is smooth and high efficient, which lays the foundation for the quick improvement of economic technological indexes after the blow-in.

The invention relates to a method for comprehensively recycling zinc, copper, lead, gold, silver and sulfur from floatation silver concentrate. The method comprises the following steps of: firstly carrying out size mixing on flotation silver concentrate, mixing the flotation silver concentrate and zinc electrolytic waste liquid for size mixing in the size mixing process, wherein the sulfuric acid concentration of the zinc electrolytic waste liquid is 180-250g/L, and the proportion of the flotation silver concentrate to the zinc electrolytic waste liquid is 1: (6-10); then adding the flotation silver concentrate subjected to size mixing to a high-pressure reactor for carrying out high-temperature high-pressure dispersion; after the high-temperature high-pressure dispersion is ended, carrying out oxygen pressure acid leaching on the flotation silver concentrate, then carrying out filtering separation on the flotation silver concentrate by a filter press, and filtering and separating to obtain leachate and leaching residues, wherein the leachate enters an electrolytic zinc system so as to recycle copper, zinc, lead, gold, silver, while elemental sulfur is enriched in the form of leaching residues, and finally returning to a bottom blowing furnace of a lead system for recycling.

The invention discloses a burden distribution method for using small coke nuts by a blast furnace. By adopting the method, the utilization ratio of small-size coke nuts is greatly increased, the coking pressure brought by increase of the productivity is relieved, and the production cost of pig iron is lowered at the same time; and the limitation that the size of cokes of the traditional large blast furnace 2,000m<3> or more grade needs to be larger than or equal to 25mm is broken through, and small coke nuts with the size being 5-10mm are applied to a blast furnace fuel, so that the utilization ratio of small-size coke nuts is increased.

The invention discloses a recycling method of papermaking advanced treatment wastewater based on chemical decalcification. The recycling method comprises the following steps of chemical decalcification, filtering, electrolysis, membrane separation (ultra-filtration/MBR) and desalination. By combination of a chemical decalcification technology, an electrochemical technique and a membrane technology, 70-85% of papermaking advanced treatment wastewater can be recycled after being processed. Thus, wastewater emission is reduced; environmental pollution of the wastewater is avoided; waste of water resources is reduced; and the cost of regenerated circulating water is lower than the price of running water. Therefore, the recycling method is economical and reasonable; good economic benefit is generated; water consumption targets of tons of paper and wastewater discharge targets are greatly reduced; and the economic and technical indexes of enterprises are improved.

The invention provides a separation mineral processing method for molybdenite and galena. The method is characterized in that molybdenum lead mixed ore, that is, raw ore is ground to be in the certain fineness, and the concentration and the PH of the slurry are adjusted; a galena combined inhibitor is added to restrain the galena, and a molybdenite collecting agent is added to achieve separation of the molybdenite and the galena; and the galena combined inhibitor is composed of ammonium sulfide, sodium sulfite and sodium pyrosulfite. A medicine agent used in the method is environment-friendly, and finally-obtained molybdenum concentrates and lead concentrates are high in grade. The mineral processing method is simple in technology, management and operation on site are easy, and the higher economic and technical indexes can be obtained through the technology.

The invention relates to a converter smelting operation decision supporting system of which the hardware system comprises a database server and a plurality of terminal personal computers (PC). The database server and the terminal PC are connected through a server to form a local area network; and an original data receiving module and a data storing module are arranged in the database server, and a real-time data curve generating module, an optimum proportioning module and a data optimum module. The hardware system also comprises an operation and final state data automatically collecting system comprising an oxygen lance position data collecting device, a slagging data collecting device, a molten steel temperature detecting device and a detecting device for carbon content in destination molten steel. The terminal PC displays a comprehensive real-time sign drawing for the process of converter smelting operation on line. The comprehensive real-time sign drawing comprises height identification of the oxygen lance position corresponding to the same time axis and added labels of slagging materials. The invention can direct the job operation of operators and support the operation decision of the operators.

The invention relates to a method and device for measuring the mass of a solid in a solid and liquid mixture. The method comprises the following steps that a) the type of the solid in the solid and liquid mixture is determined, and the density Psolid of the solid is obtained by a table look-up or experiment method; b) the Volume Vmixutre and the mass Mmixture when the volume of the solid and liquid mixture equals Vm are measured; and c) according to that the volume of the solid and liquid mixture equals the sum of the volume of the solid and the volume of the liquid and that the mass of the of the solid and liquid mixture equals the sum of the mass of the solid and the mass of the liquid, an equation set is obtained, and values in the steps a) and b) are substituted into the equation set to obtain the Msolid. The method is simple and practical, realization approaches are diversified, both online measurement and static measurement can be realized, and the measuring precision is easy to control.

The preparation process of high-purity aluminum chloride includes the following steps: adding NaCl, AlCl3 and sodium fluoride in the weight ratio of 30-40 to 50-60 to 1-10 into reactor to form the mixture mother liquid, heating the mother liquid to 800-830 deg.c; adding the mixture alumina and carbon blank in the weight ratio of 5.7:1 and chlorine in 11.8 units into the reactor while stirring for reaction with the mother liquid; sectionally condensating and recovering the produced gas and eliminating impurities in different temperature sections to obtain high-purity aluminum chloride; and treating and recovering tail gas. The said process has the advantages of easy-to-obtain material, low production cost, simple process, high product purity, no environmental pollution, etc.

The invention discloses a stagnation pressure measuring device and method of an oxygen lance system and belongs to the technical field of steel smelting. The stagnation pressure measuring device comprises an oxygen main pipe which is connected with an oxygen branch pipe. A pressure taking point is arranged on the oxygen branch pipe. The output end of the oxygen branch pipe is connected with an oxygen soft pipe, and the output end of the oxygen soft pipe is connected with an oxygen lance. One end of the oxygen lance is an oxygen lance end portion, and an equivalent throat is installed at the end portion of the oxygen lance. The equivalent throat is composed of a cylinder barrel and a conical contraction section, a pressure taking hole is formed in the side wall of the cylinder barrel, and the pressure taking hole is connected with a standard pressure gauge through a pipeline. By means of the stagnation pressure measuring device and method, the relation between the pressure of the pressure taking point and the stagnation pressure before a spraying head is determined based on pipeline pressure loss measurement and according to the calculation of corresponding spraying head parametersand work conditions, a basis is provided for correcting the design of the oxygen lance spray head and determining the operation pressure of the oxygen lance, the oxygen supply and slag making system is optimized, and economic and technical indexes are improved.

The invention discloses a method for continuously detecting ingredients and temperature of molten steel, and relates to the technical field of steel making detection equipment, structural improvementis performed on an existing detection probe to solve the continuous ingredient test problem and continuous temperature measurement problem necessary for intelligent steel making, therefore model intelligent steel making is realized, and intelligent dispatching and management of the temperature of an entire steel mill can also be achieved by the continuous temperature measurement of a steel refining furnace and a molten steel tank, so that various economic and technical indexes are greatly improved. Moreover, the method for continuously detecting ingredients and temperature of molten steel in the invention has the technical effects of less one-time investment, less maintenance cost, low probe cost, reliable detection result, no steel leakage doubt, and the problem in the prior art only continuous temperature measurement can be realized, but continuous detection data of ingredients such as carbon and phosphorus and the like that are necessary for intelligent steel making cannot be provided is solved. The device for continuously detecting ingredients and temperature of molten steel in the invention can realize continuous monitoring of the temperature and ingredients of molten steel.

The invention relates to a method for improving filtration performance of zinc oxide leaching liquid, and belongs to the technical field of nonferrous metallurgy. According to the invention, zinc oxide smoke and a calcium aluminum composite desiliconization agent are mixed and added to a sulfuric acid dilute solution to conduct leaching for a period, and the leaching finish point acidity is kept to range from 0.8g/L to 2.5g/L. In the process of leaching of the zinc oxide smoke, an insoluble compound is generated by Ca2+ and Al3+ in a reaction between silicic acid and the calcium aluminum composite desiliconization agent in the leaching liquid, the content of the silicic acid, affecting filtration, in the solution is reduced, and therefore the filtration performance of the solution is improved. Compared with the prior art, the method has the advantages that an existing zinc oxide smoke leaching technology does not need to be changed, the operation that oxhide gelatin is added to improve the filtration performance of the solution is not required, and therefore the content of organic matter, generated after recycling of tannic acid, in the zinc electrowinning process of the sulfuric acid solution can be obviously reduced, the hazard caused by the organic matter to zinc electrowinning is reduced, the economic and technical indexes of zinc electrowinning are improved, the overall cost of production run is reduced, and the operation is easy and convenient.

The invention provides a method for controlling uniform erosion of bottom blowing bricks and the furnace bottom of a steel refining furnace. The method comprises the following steps of in an earlier stage of furnace service, controlling the slag splashing time to be 1.5-2.5 minutes, the slag splashing gun position to be 0.8-1.5 m and the slag splashing pressure to be 0.8-0.9 MPa for each furnace slag splashing; in middle and later periods of furnace service, performing slag modification treatment according to the mass content of Fe in the slag, and then performing slag splashing for each furnace; and performing fettling maintenance. According to the method for controlling uniform erosion of the bottom blowing bricks and the furnace bottom of the steel refining furnace provided by the invention, the erosion rate of the bottom blowing bricks and the furnace bottom is controlled by means of adjustment of slag splashing schemes in different furnace service periods, steel slag quenching andtempering treatment and the fettling maintenance, so that the purposes of uniformly eroding the bottom blowing bricks and the furnace bottom, improving the bottom blowing stirring effect and guaranteeing the production safety are achieved.

The invention discloses a molten pool smelting converter with antimony ore bottom blowing and top blowing mixed. The molten pool smelting converter comprises a horizontal barrel-shaped converter body.The converter body comprises a converter body shell and a converter cavity arranged in the converter body shell. A refractory material is arranged between the converter body shell and the converter cavity. A walking gear used for controlling rotating is arranged at one end of the converter body shell, and a driven rotating gear is arranged at the other end of the converter body shell. A feeding opening is formed in the side face or one end face of the converter body shell, and a smoke discharge opening is formed in the other end face of the converter body shell and is in noncontact connectionwith a flue. One or more bottom blowing air holes and one or more top blowing inserting holes are formed in the converter body shell. The bottom blowing air holes and the top blowing inserting holespenetrate through the converter body shell and the refractory material to communicate with the interior of the converter cavity. According to the technical scheme, productivity can be effectively improved, energy consumption can be reduced, economic technology indexes can be improved, and production cost can be reduced.

The invention discloses a comprehensive treatment process for a silver-bearing material in silver nitrate production. The comprehensive treatment process comprises the following steps of 1, liquid preparation; 2, reaction; 3, rinsing; 4, drying; 5, anode plate casting; 6, silver electrolysis; 7, finished product casting. According to the comprehensive treatment method, the treatment process of thesilver-bearing material generated in the silver nitrate production is effectively simplified, and the method has the advantages of being low in treatment cost and high in economic and technical index.

The invention discloses a blast furnace main runner repairing process, belongs to the technical field of blast furnace smelting, and provides a blast furnace main runner repairing process capable of remarkably shortening the main runner repairing time. The process comprises the following steps: a an iron notch is blocked and supply is cut off; b hoisting equipment is used for hoisting a special brake block, and the special brake block is put into the main runner, so that residual molten iron in the main runner is extruded, replaced and discharged, wherein the size of the special brake block matches that of the accommodating cavity of the main channel; c after the residual molten iron in the main runner is discharged, the special brake block is hoisted out by hoisting equipment, and then the residual molten iron residues in the main runner are cleaned; and d the part to be repaired in the main trench is repaired. According to the method, the special brake block is directly hung in the main runner, so that the residual molten iron in the main runner can be quickly replaced and discharged, and the residual molten iron can be discharged only in 10 to 15 minutes, so that the time can be greatly saved, the repairing efficiency of the main runner is improved, the economic and technical indexes of the blast furnace are improved, and the cost is saved.