202results about How to "Improve economic indicators" patented technology

The invention provides a metallurgical composite pelletizing prepared through a twice pelletizing method, as well as a preparation method and an application thereof. The pelletizing is provided with a pelletizing shell formed by a central pelletizing core and a pellet material coating the outside of the pelletizing core. The internal pelletizing core of the formed pelletizing is in a reducing atmosphere, the outside of the formed pelletizing is in an oxidizing atmosphere, and the metallurgical composite pelletizing undergoing twice pelletizing satisfies the metallurgical requirements. The pelletizing core takes an iron-containing material and reducing coal dust or coke powder as raw materials in which adhesive and waste fly dust are added, and is obtained by means of disk pelletization or pressure pelletization. The pelletizing shell takes the iron-containing material and the pelletizing core as raw materials in which the adhesive is added, and is obtained by means of disk pelletization and taking the pelletizing core as the center of the sphere. Various metallurgical performance indexes of the composite pelletizing are highly better than normal pellets. The composite pelletizing not only realizes the harmlessness and the recycling of the waste fly ash, but also can greatly improve the technical and economic indexes of iron making blast furnaces. In addition, the composite pelletizing not only achieves such social benefits as energy conservation, emission reduction, environment protection and environment pollution treatment, but also can create considerable economic benefits.

A method for extracting metal from bismuth-contained multi-metal material is carried out by leaching out copper and tellurium from bismuth-contained multi-metal by sulfuric acid, adding into chlorinating agent and oxidant to leach out metal bismuth, extracting silver from leaching-out slag with AgCl, PbSO4 and PbC12, adding ammonia water into leaching-out liquid, adjusting pH value to 1.5 to obtain bismuth oxychloride slag with 70% bismuth content, smelting into coarse bismuth by firing method or machining to obtain high-purity bismuth sesquioxide, adjusting pH value to 4.5 by Na2CO3, depositing tellurium to obtain tellurium dioxide and copper-contained solution, and electrically depositing to obtain copper powder with copper-contained content90%. It adopts wetting and firing metallurgical technology, has higher metal recovery rate and excellent leaching-out separation effect and effluent circulating utilization and no environmental pollution.

The invention relates to a steam system in field of chemical industry, metallurgy and the like and in particular relates to an operation optimizing system and an operation optimizing method of a steam system of the fields. The operation optimizing system of the steam system comprises a real-time database, a relation database, an optimization model constructing model, an optimization model calculating model and a man-machine interface module. The invention further provides the operation optimizing method of the steam system, which can construct an optimized model according to actual conditions of the steam system and can utilize an optimization algorithm to calculate to obtain an optimization operation scheme, so that field scheduling personnel and managers can schedule according to the optimization scheme, the economical efficiency of the operation of the steam system is improved, the energy consumption of an enterprise is reduced and the production cost of the enterprise is reduced.

The invention relates to a hollow floor system filled with an air-filling bag and a construction method thereof, belonging to the field of the structure of the common building. The hollow floor system consists of the air-filling bag (1), upper steel bars (2), lower steel bars (3), hidden girder steel bars (4) and concrete (5), wherein the air-filling bag (1) is positioned among the upper steel bars (2), the lower steel bars (3) and the hidden girder steel bars (4); a bag wall (8) of the air-filling bag (1) consists of four side walls (9), an upper wall (10) and a lower wall (11); the shapes of at least two side walls (9) adjacent to the hidden girder steel bars (4) in the air-filling bag (1) are planes; the shapes of the upper wall (10) and the lower wall (11) are heaved-outward arc surfaces; and positioning pieces (12) are arranged among the inner sides of the side walls (9) so as to ensure that the two side walls (9) are parallel mutually. The hollow floor system has large span, better reliability, earthquake resistance and crack resistance, and good economy and applicability.

The invention discloses a three-point travelling single-cable-plane guyed travelers, which is characterized in that: a top longitudinal beam is formed by assembling bailey beam and is arranged at a web plate at both sides of the top surface for main beam; the guyed longitudinal beam is a braced girder structure formed by assembling and welding profile steel and is arranged at the bottom part of central girder for the bridge; a travelling hanging frame is fixed on the top longitudinal beam which is connected with a front lower beam of the guyed longitudinal beam by the front suspension; shifting forward; horizontal jack is respectively arranged on two longitudinal beams and a guyed longitudinal beam, the three points are used for incremental launching. The invention has the advantages of realizing three point travelling using two front suspensions of the top longitudinal beam and the rear suspension of the guyed longitudinal beam, lowering structural facilities such as edge longitudinal beam specially designed for travelling, having small weight ratio for the travelers and the beam body section, having better economic index compared to the same kind of guyed travelers, using the rear suspension travelling frame arranged on the beam body completing pouring to support the guyed travelers, forming a stable three-point system due to two top longitudinal beams suspending the front lower beam, reaching stably and quickly shifting forward and decreasing the weight of the travelers.

The invention relates to a design and construction method of a rigid-flexible composite anti-seepage recoverable supporting structure system. The method comprises steps as follows: (I) profile steel slope-protection piles are constructed; (II) H-shaped steel top beams and H-shaped steel breast beams are installed; (III) steel panels are installed; (IV) sequential vertical layered and sectioned excavation is performed, steps (II) and (III) are repeated, construction is performed to the design depth, and construction of the rigid-flexible composite anti-seepage recoverable supporting structure system is completed; (V) after the use function of a supporting structure is fulfilled, with the start of foundation pit backfill work, recovery work can be performed. The rigid-flexible composite anti-seepage recoverable supporting structure system constructed through the method really reflects characteristics of a temporary security measure adopted by foundation construction of foundation pit engineering and has the advantages of safety, reliability, quickness construction, advanced technology, capability of being recycled, excellent economic indices and the like.

The invention discloses a two-gear AMT comprehensive gear shifting method of a pure electric vehicle, and belongs to the technical field of new energy vehicle power systems. Firstly, an optimal dynamic gear shifting rule and an optimal economical gear shifting rule are provided according to overall performance demands of the pure electric vehicle; based on the two optimal gear shifting rules, withthe gear shifting point vehicle speed and the gear shifting delay quantity as optimization variables, and with the overall vehicle energy consumption and the gear shifting point acceleration difference value as target functions, a comprehensive performance gear shifting rule optimization model giving consideration to both economy and dynamic property is built; and finally, the optimization modelis solved by using a NSGA-II genetic algorithm to obtain comprehensive performance gear shifting rules.

The invention relates to a tobacco culturing method applying large holes for concentrated fertilization. The method is applicable to plain areas of Henan province, and mainly comprises the steps that a base fertilizer is not applied in a culturing process; according to the planting density (16500-18000 plants/hm<2>), the large holes are dug at central positions of tobacco plants planted on a tobacco ridge in a tobacco seedling transplanting process; and various fertilizers are mixed uniformly, applied in the holes according to the calculated fertilization amount of each plant, and sealed after being mixed with soil in the holes sufficiently and uniformly. According to the method, soil water and fertilizer nutrition absorption of the tobacco plants and coordination of water, the fertilizers, air and heat are facilitated; a supply of mineral elements such as N, P,K and Cl is optimized; root development and thickening of the tobacco plants can be facilitated; the disease-resistant ability of tobaccos is improved; the growth advantage of a whole growth period is obvious; resource waste and environmental pollution due to blind fertilization are avoided; the production cost is lowered; effects of oil increasing, aroma enhancing, potassium increasing, alkali reducing, chlorine reducing and starch reducing are exerted in an aspect of improving the quality of tobacco leaves; the internal quality of the tobacco leaves is improved; and economic indicators of the tobacco leaves are increased remarkably.

The invention relates to a standardized design construction method of a flexible compound fabricated recoverable rectangular working well supporting structure. The method comprises the following stepsthat (1) construction of minisize supporting piles is carried out; (2) construction of pile top crown beams; (3) a rectangular working well is excavated, panels and waist beams are installed, and high polymers are poured to side walls for sealing; (4) excavation is carried out layer by layer sequentially in the vertical direction, and the step (3) is carried out repeatedly till the design depth is met, that is, construction of the rectangular working well supporting structure is completed accordingly; and (5) after the supporting structure fulfills the usage function, the supporting structurerecovery work can be carried out as the backfilling work is started. Through standardized design construction of the established supporting structure system, one supporting structure can meet the construction requirement of most rectangular working wells in a region, the advantages of safety, reliability, quick and convenient construction, advanced technologies, high recoverability, superior economic indicators and the like are achieved, and the application and development prospects are considerable.

The invention provides a method for mixed-loading blast furnace materials, ironstone and coke are loaded into the furnace hierarchically, characterized in that the ironstone loaded into the furnace is ore having two or more than two different alkalinity, and the ore is mixed according to the matching proportion of furnace alkalinity requirement prior to entering into the blast furnace. The invention solves the problem that each material layer in the original blast furnace owes the diverse formed softening, fusing, falling starting temperatures to diverse alkalinities, causing the bad air and liquid permeability of material post at the lower part of the blast furnace so as to have an influence on the stable operation of the blast furnace. The invention has the characteristics of reducing the alkalinities of initial slag and bosh slag of the high alkalinity sinter, dropping the melting point of the initial slag, promoting the fluidities of the initial slag and the bosh slag, thus improving the air and liquid permeability of material post at the lower part of the blast furnace and creating advantageous conditions for further increased production and coke saving.

The invention discloses a blast furnace big data application system. The system comprises a detection and monitoring subsystem, a data conversion platform, a data association analysis and mining subsystem, a blast furnace mechanism modeling and digital simulation subsystem, a blast furnace process analysis and prediction subsystem and a foreman support subsystem, wherein the detection and monitoring subsystem is used to collect blast furnace iron-making process data; the data conversion platform is used to integrate the blast furnace iron-making data and acquire uniformly-represented blast furnace iron-making data; the data association analysis and mining subsystem is used to interact with the data conversion platform and further extract operation rules, modeling parameters and historicaldata traceability; the blast furnace mechanism modeling and digital simulation subsystem is used to establish a mathematical model for implementing blast furnace simulation; the blast furnace processanalysis and prediction subsystem is used to analyze a blast furnace production process; and the foreman support subsystem is used to push/display results of each of the above subsystems. The above system can make full use of data in multiple fields, gives a universal operation rule reference, enriches blast furnace iron-making analysis methods, provides tools for deeply knowing blast furnaces, and provides control suggestions or guidance for the long-life, high-quality, low-consumption and stable operation of the blast furnaces.

The invention discloses a main girder structure system of a double-layer bridge deck cable-stayed bridge. The structure system comprises a mid-span main girder and a side-span main girder, and is characterized in that the mid-span main girder adopts the combination of a plate truss and a steel truss girder, and the side-span main girder adopts a structure system of a composite truss girder. The structure system can effectively shorten the side-span span to prevent the side-span weight, keeps the appearance consistency of the whole bridge main girder, and has higher promotion values on such aspects as economy, bridge landscape and driving comfort.

The invention discloses a very-high performance concrete prefabricated assembled pipe gallery and a construction method. The pipe gallery is formed by inserting and splicing a plurality of concrete rectangular culvert monomers which are integrally formed front and back; each of the rectangular culvert monomers comprises a side plate, a bottom plate, a top plate and a partition plate; reinforcing rib structures are arranged on the outer side surfaces of the side plate and the top plate; axil angles are arranged at the connections of the side plate and the bottom plate and the side plate and thetop plate; prestress locking devices are arranged at the axil angles; inserting structures which are matched are arranged at the front and back ends of each of rectangular culvert monomers; and the inserting structures are waterproof devices. The construction method comprises the following steps: 1) preparation of the prefabricated rectangular culvert monomers; 2) excavation and support of foundation pits; 3) foundation treatment and cushion ply paving; 4) hoisting of the prefabricated rectangular culvert monomer sections; 5) penetrating and tensioning of the prestress ribs in position; 6) waterproof experiment of the pipe gallery; and 7) soil mass backfilling. The pipe gallery material dosage is reduced greatly, the self weight is reduced greatly, and the very-high performance concrete prefabricated assembled pipe gallery is convenient to transport and hoist, few in step, short in construction period and good in waterproofness and durability.

The invention discloses a method for distributing raw materials with high zinc content in a blast furnace with a bell-less top, which comprises the following steps of: (1) controlling ore batch weight to be greater than a critical value, and ensuring that the average thickness of ore at the furnace throat is 8 to 10 percent of the diameter of the furnace throat; (2) adopting a material distribution mode from a small angle to a large angle increasingly at distributor chutes on the furnace top, and ensuring that small particle burden and powder caused by mass flow particle segregation are distributed from the center of the blast furnace to a part 1/3 away from the edge of the furnace wall when a material tank discharges materials; (3) selecting double-ring single pile top large-angle distribution for ore and coke gears, distributing outer-ring ore according to the maximum angle, ensuring that the ore and coke angular difference is -2 degrees and the angular difference of the inner and outer rings of the ore and the coke is 6 degrees, controlling the materials distributed in the inner ring to account for 50 to 60 percent of the total burden, making the ring number of the outer ring distribution at least two, and ensuring that the outer-ring distribution pipe top covers the inner-ring distribution pipe top; (4) adopting a positive packaging and ore-coke unequal line packaging method; and (5) regularly performing tank turning operation on tank-combined blast furnace with the bell-less top, and controlling 4 to 5 tank turning cycle periods in a material column.

The invention discloses a production process for improving production intensity of propionic acid, which comprises the following steps of: controlling a fermentation temperature to be 37 DEG C at the early stage (0 to 72 hours) of fermentation; and controlling the fermentation temperature to be 30 DEG C from the 72th hour to the fermentation end. Under the control of the strategy, the production intensity of the propionic acid is improved by 45.5 percent (0.278 vs 0.191g/(L.h)), the fermentation time is shortened by 20 percent (150 vs 120h), and the yield of the propionic acid can be improved by 16.8 percent (28.6 vs 33.4g/L). The propionic acid produced by using the strategy can be applied in the fields of food, chemical industry and the like, and the strategy has vital significance for production of other fermented products.

The invention provides an ultra-high-performance concrete prefabricating and splicing integration pipe gallery system which is formed by splicing a plurality of prefabricated sections. Each prefabricated section is prepared through ultra-high-performance concrete. Each prefabricated section is composed of a side plate, a bottom plate, a top plate and a partition plate. Each partition plate is fixed between the corresponding bottom plate and the corresponding top plate. The adjacent prefabricated sections are overlapped through ultra-high-performance concrete patches. The invention further discloses a construction method of the pipe gallery system. According to the integration pipe gallery system, the prefabricated sections of the integration pipe gallery system are made of materials like the ultra-high-performance concrete with high strength, high tenacity and high durability, the structure of the ultra-high-performance concrete patches and the like is combined, rigidity, bearing capacity and waterproof performance of a pipe gallery are improved, the wall thickness of the prefabricated sections is reduced compared with that of a traditional pipe gallery system, the dead weight of the pipe gallery is reduced remarkably, and transporting and hoisting are convenient. The material use amount of the pipe gallery is low to be 50% of that of the traditional pipe gallery system, the comprehensive production cost is reduced by 10-50% correspondingly, rigidity is large, the system is suitable for regions with poor foundation geologic conditions, the construction period of the pipe gallery system is short, and the influence on the construction environment is small.

The invention discloses a highway and railway layered steel box beam. The highway and railway layered steel box beam comprises a box beam top board and a box beam bottom board, wherein the box beam bottom board is located below the middle portion of the box beam top board, a supporting structure is arranged between the box beam top board and the box beam bottom board and is of a truss-type box structure, edge webs which extend in the vertical direction are arranged at the two transverse ends of the box beam top board, an edge bottom board is arranged between the lower end of each edge web and the end portion of the same side of the box beam bottom board, and an inverted-trapezoidal box cavity is defined by the box beam top board, the edge webs, the edge bottom boards and the box beam bottom board. On the basis of a conventional steel box beam, the height of the section is increased, and a railway can be arranged inside the steel box beam; the supporting structure between the box beam top board and the box beam bottom board is of the truss-type box structure, and compared with an integrated type steel box beam, the highway and railway layered steel box beam saves rolled steel.

The invention discloses a high-speed railway rush repair beam capable of being converted into a permanent bridge structure, and a rush repair method of the high-speed railway rush repair beam. The high-speed railway rush repair beam is formed by single-line uplink rush repair beams and single-line downlink rush repair beams which are independent of one another in a temporary traffic state; the single-line rush repair beams respectively adopt a structural form of a prestressed steel box girder, the steel box girders are manufactured in a way of segmentation, and segments of each steel box girder are connected in a manner of steel pin-shear key; a longitudinal external prestressed reinforcing steel bar is arranged above a lower wing plate of each steel box girder and at the inner side of a web of the steel box girder. By means of pouring a concrete structure layer above the steel box girders as well as arranging and tensioning transverse prestressed tendons between the single-line uplink rush repair beams and the single-line downlink rush repair beams, a double-track and whole-span prestressed steel-concrete composite beam is formed by the rush repair beams and can be used as the permanent bridge structure for normal operation. Compared with the existing rush repair steel beam, the high-speed railway rush repair beam is characterized in that the traffic speed is high, a beam part structure used for temporary rush repair is no longer dismantled, and the temporary rush repair beam is converted into the permanent bridge structure by the conversion of a structural system, so that beam-replacing construction of a damaged bridge is further avoided.

The invention discloses a stable anode-changing method at the late period of an aluminum electrobath. The anode is changed from 13th day after aluminum electrobath startup, in order to assure successive production as changing anode in normal period, a residual anode capable of producing for 18 days is used in 16th day and 19th day after aluminum electrobath startup; a residual anode capable of producing for 20 days is used in 22th day after aluminum electrobath startup; a residual anode capable of producing for 11 days is used in 25th after aluminum electrobath startup; a residual anode capable of producing for 11 days is used in 28th day after aluminum electrobath startup; and a residual anode capable of producing for 7 days is used in 32th day after aluminum electrobath startup. The invention has no anode changing after successive 12 days after aluminum electrobath startup, energy balance of the electrobath is not affected during this period, firm and structured furnace wall is formed, so that the electrobath has effects of stability, high efficiency and low consumption, thus improving the economic index of an enterprise.

The invention relates to a sliding-pressure operation unit optimizing control method in an automatic gain control (AGC) mode, and the method has the advantages of simplicity, effective reduction of oscillation occurrence, economic efficiency of unit operation and the like. The method comprises the following steps: 1) filtering load setting after load is set; 2) setting an ideal sliding-pressure curve according to the best efficiency points of throttling and circulating efficiencies; 3) realizing automatic optimizing of sliding-pressure setting by utilizing a pure integral module of proportion integration differentiation (PID); 4) increasing a high-low limit module after a pressure setting velocity is limited so as to prevent a pressure setting value from exceeding the range permitted by unit safety operation; and 5) manually setting the load setting by operators when the AGC is not carried out, wherein the load is prevented from small oscillation, corresponding pressure setting is prevented from small oscillation, and pressure setting in logics is switched to an operation bypass.

The invention relates to a method for harmlessness treatment of waste mineral oil by a blast furnace injection mode. Through collection, pretreatment, blowing, combustion, and residue treatment on waste mineral oil having no regeneration value, and comprehensive utilization and thoroughly harmlessness treatment of a waste mineral oil resource are realized.

The invention discloses a copious cooling fast freezing infrared drying technology and belongs to the technical field of chemical engineering and light industry machining. The copious cooling fast freezing infrared drying technology is characterized in that a gas turbine expanding refrigerating technology is adopted for performing copious cooling fast freezing on materials, compressed air at 0.5-0.9 Mpa is used, the initial air expanding pressure intensity ratio is 3-9, and fresh product vegetables and fruits and traditional Chinese medicinal materials except mineral drug are fast cooled to minus 20- minus 120 DEG C within 5-30 min, so that liquid water in a raw material organization structure fast solidifies, and becomes extremely micro ice crystal; and then, the materials are fed into aninfrared vacuum freezing drying bin to be heated, so that solid water in the materials sublimates into vaporous water, and the water content of the materials is lowered to 0-10%. The copious coolingfast freezing infrared drying technology has the characteristics of being high in freezing speed, low in cooling temperature, high in drying speed, uniform in material heating, uniform in material product quality and good in drying effect.

A high-speed cross-belt sorting and conveying machine control system which is characterized in that an SLC synchronous linear motor is used for supplying a power for driving a sorting host machine; leaky wave technology is adopted between the sorting host machine and a sorting trolley for performing ProFiNET communication, CANopen-based DC servo driving technology is adopted for trolley conveying, and furthermore material synchronous leading logic control technology is utilized. The high-speed cross-belt sorting and conveying machine control system has beneficial effects of greatly improving conveying performance of a cross-belt sorting trolley, simplifying system wiring, improving maintainability, and facilitating number increase and number reduction of trolleys. A large number of quick connect plugs are used in the whole cross-belt sorting and conveying machine control system, and the trolleys are electrically connected with one another by means of standard plugs, thereby optimizing electrical wiring and device layout of an electric control system, saving expense of a certain number of electrical configurations (such as wiring terminals and cables) and realizing a relatively good economic index. Furthermore electrical mounting structure of the equipment is optimized. Equipment fault repairing and maintenance are facilitated.