83results about How to "Demonstration effect is good" patented technology

The invention relates to a quality random inspection execution process supervision system. With a B / S architecture adopted, a supervisor monitors and manages an execution process through adopting mobile Internet technologies and by means of a supervision server, namely, a supervision port, which is constructed through a browser, a server or the like, and a mobile phone or special execution terminal used by field execution staff, such as a mobile phone equipped with special application software; the supervision server of the system is provided with a recording database and a random inspection process supervision module; the execution terminal is in network connection with the supervision port so as to carry out sampling / sample purchase planning, task reception, download and information inputting of various steps of a random inspection execution process; the information acquisition of the solidified flow of the random inspection execution process can be obtained through the solidified sampling / sample purchase link flow module of the execution terminal; and the field random inspection staff carries out random inspection process execution and stores information and evidences of each step through using the application of the mobile phone or special execution terminal application.

A process for extracting copper from copper oxide ore includes such steps as immersing in ammonia water in ordinary temp and ordinary pressure condition, extracting electrodeposition, and floatation. Its advantages are low consumption of energy and low cost. It is especially suitable for the low-grade copper oxide ore with high content of Ca and Mg.

A slot machine comprising: an image display device, which performs a high demonstration effect, is provided. The slot machine 1 is provided with a main display 4 in front of reels 22L, 22C, 22R. The main display 4 is provided with display windows 23, 24, 25 through which it is possible to transmissively recognize modes of variable display control and stop control of the reels 23, 24, 25 visually. By having a display image control means which controls an effect image on the main display 4 in conjunction with the variable display control and stop control of the reels 22L, 22C, 22R, the display image control means is configured to be able to make the display windows 23, 24, 25 invisible in accordance with the effect image movement. Therefore, a game effect may be displayed on the main display 4, which causes united feeling with the variable display control and stop control of the mechanical reels 22L, 22C, 22R.

The invention discloses an elastic linen fabric. According to the elastic linen fabric disclosed by the invention, the resultant count is 50Nm, the separation index of linen raw materials is mainly considered during selection of the linen raw materials, and according to the test, linen with the separation degree of 250 counts or higher is finally selected to be scotched flax. The high-count linen yarns are produced by adopting a bio-enzymatic degumming technology. The elastic linen fabric disclosed by the invention achieves an excellent demonstration effect on technical progress of the bast fiber textile industry as well as energy conservation and emission reduction. The achievement can be directly popularized and applied to bast fiber production enterprises, brings considerable economic and social benefits to related enterprises, and has profound economical and social significance on the development of the textile industry and national economic construction.

The invention provides a method for preparing a fiber-grade polyester chip capable of being applied to the processing of a textile from waste braided fabric. A waste textile is subjected to crushing, alcoholysis, filtration, separation, cooling crystallization, squeezing, decoloration, rectification purification, preheating, prepolycondensation, polycondensation and cooling strip casting, and then is cut into particles; through reducing the waste textile to be high-purity bis(2-hydroxyethyl)terephthalate (hereinafter referred to as BHET for short), the fiber-grade polyester chip applied to the processing of the textile is prepared anew; the high-efficiency recovery is realized.

The invention provides an algae removal method and a movable algae removal platform suitable for a river channel type water body. The algae removal method and the movable algae removal platform suitable for the river channel type water body utilize a ship body as a carrier, adopt an ultrasonic algae removal instrument, a microfiltration machine, a self-suction type spiral stirring aeration machine and a rotary type algae salvage machine for matching, achieves ultrasonic removal, mechanical salvage, algae-water separation, and functional combination of water body oxygen enrichment and air floatation to restrain the growth of the algae in water, the irradiation frequency of ultrasonic waves is A which equals to 20-50 kHz, the irradiation distance is B which equals to 0.5m, and the irradiation time is C which equals to 5min. According to the algae removal method and the movable algae removal platform suitable for the river channel type water body, the algae body cell air bags and cell ectocrine are affected to further affect the agglomeration effect of the algae in water so that the removal of the algae is achieved. Compared with a stationary type ultrasonic algae removal method, rapid and accurate function can be carried out on the entire research water area. The movable algae removal platform eliminates the heavy workload of algae salvage for workers when a water bloom occurs, causes smaller economic loss compared with that caused by eutrophication of the water body, is suitable for water quality characteristics of secondary rivers in the Three Gorges Reservoir Region, and has a good demonstration effect.

The invention discloses a treating agent and treating system for micro-etching surfaces of recyclable copper and copper alloys. The treating agent comprises the following components by weight: 1-20% of sulfuric acid or / and nitric acid, 1.5-35% of ferric sulfate or / and ferric nitrate, 0.005-0.2% of anionic fluorinated surfactant, 0.005-5% of additive and the balance of deionized water. Besides, the treating system comprises a micro-etching working tank, an electrolytic drug regeneration and copper recovery system and an automatic control system for connecting the micro-etching working tank with the electrolytic recovery and regeneration tank and realizing automatic stable control. The circuit board micro-etching regenerative cycle process and equipment have the beneficial effects of reducing the production cost of the micro-etching process, improving the level of the process for micro-etching the surfaces of the copper and copper alloys and achieving the aims of cleaner production and zero emission.

The invention relates to a coke oven coking method for improving a ratio of long flame coal for chemical coke. The method comprises the following steps: a, performing secondary crushing on long flame coal, and mixing the long flame coal with an adhesive in a storage warehouse; b, performing pre-grinding on the long flame coal mixed with the adhesive, feeding the coal into a coal blending chamber, improving a ratio of the long flame coal mixed with the adhesive to 80 percent, adjusting a gas-fat coal ratio with high adhesiveness to 20 percent, and feeding the coal into a crusher for crushing after mixing; c, performing primary water injection on the prepared mixed coal, crushing the coal in a crusher chamber, performing secondary water injection on the crushed mixed coal, feeding coking coal into a charging car for tamping, so that the coking coal is smashed into a dense coal cake, and feeding the coal into a carbonization chamber for performing high-temperature dry distillation; and d, performing high-temperature dry distillation on the coking coal, performing coke quenching by adopting a dry method, and finally naturally cooling to obtain the chemical coke product. According to the method, low-cost smelting and chemical industry carbon materials can be produced, and the gap that smelting and chemical industry carbon materials are deficient is overcome.

The invention provides a neosporosis rELISA antibody assay kit. The neosporosis recombinant enzyme-linked immunosorbent assay (rELISA) antibody assay kit is characterized in that designing a primer set according to a neospora caninum NcSRS2 gene of the GenBank, introducing the primer set to an enzyme digestion site, removing a signal peptide zone of an NcSRS2 protein, extracting a DNA from Xinjiang cow positive serum, carrying out polymerase chain reaction (PCR) amplification of the DNA to obtain a tNcSRS2 genetic fragment having length of 975bp, cloning the tNcSRS2 genetic fragment into a pMD-18-T carrier, carrying out enzyme digestion and sequencing, further directionally connecting the desired fragment obtained by the previous step to a pGEX-4T-2 expression carrier, transferring the pGEX-4T-2 expression carrier with the desired fragment into escherichia coli, carrying out inducible expression and purification, wherein expressed fusion protein molecular weight is about 62kDa, and carrying out ELISA antigen coating by the expressed fusion protein to obtain the neosporosis rELISA antibody assay kit. A use method of the neosporosis rELISA antibody assay kit comprises the following steps that a coated enzyme label reaction plate is taken out, is subjected to first washing, is enclosed, is subjected to second washing, is added with a sample needing to be detected, is subjected to third washing, is added with a secondary antibody, is subjected to fourth washing, and undergoes a color reaction; and when the color reaction is finished, an OD450 / 630 value of the coated enzyme label reaction plate is read and a result is determined. Compared with a commercial ELISA assay kit, the neosporosis rELISA antibody assay kit has a higher coincidence rate above 95% The neosporosis rELISA antibody assay kit also is suitable for the ELISA of a neospora caninum antibody in ruminant serum and blood plasma.

The invention relates to a low-yield-ratio high-strength pipeline steel production method. The method includes the working processes of steelmaking-continuous casting, casting blank heating, casting blank control rolling, steel plate control cooling and straightening through a straightening machine; in the working process of rolling, during austenite crystalline region elongation rolling, the single track reduction rate is not lower than 16%, the accumulated valid reduction rate is not lower than 70%, and the austenite crystalline region single track reduction rate is not higher than 18%; and in the working process of control cooling, the austenite crystalline region rolling starting temperature is lower than Ar3 temperature by 20 DEG C to 30 DEG C, the rolling temperature scope is located in an austenite and ferrite coexistence region, the cooling starting temperature is lower than the Ar1 temperature, and large phase change stress is prevented from being generated in the cooling process. A pipeline steel product produced through the process has the high strength, and meanwhile has the good tenacity and the excellent yield ratio scope; and the contradiction of high strength and low yield ratio of the iron and steel industry pipeline steel series products is solved, and the best level of similar enterprises in China is achieved.

The invention discloses a preparation method for a flax viscose filament color-spun yarn. The prepared flax viscose filament SIROFIL yarn is small in hairiness and high in elasticity and can improve the yarn style according to the color and denier of the viscose filament, so that the weaved fabric is able to overcome some deficiencies of the pure flax fabric. The development of the flax viscose filament SIROFIL color-spun yarn is based on the development practice of cotton spinning color-spun yarn, and the successful development of the flax viscose filament color-spun yarn leads the industry product development trend and appears for the first time among the series of products in the industry.

The invention relates to an experiment device for measuring the motion characteristics of a slope rolling stone. The device comprises a three-dimensional slope model, a bottom plate, a protective screen, force sensors, a data acquisition system and high-speed cameras, wherein the three-dimensional slope model is disposed on the bottom plate in an inclined manner, and the lower end of the three-dimensional slope model is connected with the bottom plate. The protective screen is disposed at the tail end of the three-dimensional slope model, and both ends of the protective screen are connected with protective columns, wherein the protective columns are connected with supporting columns through cables. The force sensors are disposed at the tail ends of the cables, and the high-speed cameras are respectively located at the left and right sides of the three-dimensional slope model and at an upper part. The device is simple in structure, is simple in operation, is novel in test method, is objective and accurate in test data, can measure the movement characteristics of rolling stones at the slopes in various geometric shapes, and effectively solves an experimental error caused by a traditional slope form. An obtained analysis result can be used for the cause study of the movement mechanism of the rolling stone, and provides a scientific basis for the disposal of dangerous rock masses and the installation of protective structures.

The invention discloses a method for preparing methanol and dimethyl ether by taking calcium carbide furnace tail gas and sodium chlorate tail gas as well as other hydrogen-containing gas sources as raw materials. The method mainly comprises the following steps: carrying out rough purification, temperature swing adsorption (TSA), pressure swing adsorption (PSA) and precise purification on the calcium carbide furnace tail gas and then mixing with hydrogen purified from the sodium chlorate tail gas and other hydrogen-containing gas sources, so as to obtain methanol synthesis gas; carrying out synthesis reaction on the methanol synthesis gas to obtain coarse methanol; and further dehydrating the coarse methanol to produce dimethyl ether, or rectifying to obtain a methanol product. According to the characteristics that the content of CO in the calcium carbide furnace tail gas is high and the content of hydrogen in the sodium chlorate tail gas and other hydrogen-containing gas sources is high, the calcium carbide furnace tail gas and sodium chlorate tail gas which are subjected to effective special treatment can serve as raw materials having higher value to be used; the purpose that the calcium carbide furnace tail gas and sodium chlorate tail gas are comprehensively utilized as the raw materials to prepare methanol and dimethyl ether is reached, the effective energies of the calcium carbide furnace tail gas and sodium chlorate tail gas as well as other hydrogen-containing gas sources are optimally utilized, thereby reaching the purposes of saving energy and reducing emission, turning wastes into wealth and improving economic benefits.

The invention provides a flotation method of highly argillaceous alkaline gangue copper oxide ore. loatability of the highly argillaceous alkaline gangue copper oxide ore is utilized to improve a conventional sulfating flotation technique, and a flotation process of foaming agent absence-powerful activation-mud dispersion-powerful collection to efficiently recycle the copper oxide ore. The method provided by the invention comprises the following steps: firstly grinding the highly argillaceous alkaline gangue copper oxide ore, then performing size mixing on the grinded ore, and finally carrying out flotation to produce copper concentrate, wherein no foaming agent is added in the whole flotation process. Compared with the conventional sulfating flotation technique, with the adoption of the method, the recycling rate of copper is improved by more than 15% based on accordant concentrate grade, not only the influence of ore mud on the flotation process is eliminated, the efficient recovery of the copper oxide ore is guaranteed, but also the convenient flotation operation and stable index are achieved; and the method is suitable for realizing further industrial and large-scale production.

The invention discloses a delivery path optimization method considering customer grade and delivery time requirements, and the method builds a vehicle delivery path optimization model considering customer grade and customer delivery time requirements, and solves the model based on an improved artificial fish swarm algorithm. In view of the defects of low solution precision, low convergence speed and the like of a standard artificial fish swarm algorithm in the later evolution stage, an elitist-guided evolution strategy, a dislocation cross strategy and a heuristic variation strategy are introduced, namely, the algorithm can quickly approach to an optimal solution through the elitist-guided evolution strategy, and the local exploration capability of the algorithm is improved; through a dislocation crossing strategy, genes of excellent individuals are inherited, and the inbreeding is effectively overcome; through a heuristic variation strategy, the diversity of populations can be improved in a targeted manner, and the global development capability of the algorithm is improved. According to the invention, the on-time delivery of important customer orders can be effectively ensured, and the satisfaction degree of customers is effectively improved, so that the economic benefits of enterprises are increased.

The invention discloses a recyclable micro etching chemical treatment agent on the surface of copper / copper alloy. The recyclable micro etching chemical treatment agent comprises the following components in percentage by weight: 1%-12% of sulfuric acid and / or nitric acid, 1.5%-25% of ferric sulfate and / or ferric nitrate, 0.002%-0.1% of additive A and the balance of deionized water. The additive A includes one or more than two of dithio-bis-sodium propanesulfonate, 3-sulfydryl-1-sodium propanesulfonate, N,N-dimethyl disulfide carbonyl sodium propanesulfonate, isothiourea propanesulfonic acid inner salt, 3-(benzothiazole-2-sulfydryl)- sodium propanesulfonate. By virtue of the recyclable micro etching chemical treatment agent, the electrolysis efficiency is improved, the energy consumption is reduced, the formation of cathode copper nodule is avoided, the risk of anode breakdown and damage is reduced, and the production control and operation are greatly simplified.

The invention provides a reinforced floatation desilicification method for high-silicon bauxite, which comprises the following steps: grinding the bauxite; at room temperature, applying a collecting agent and an inhibitor; spraying water; and then performing primary rough flotation, primary fine floatation, secondary fine floatation and middle-product scavenging, wherein the products floated from a raw ore are used as tailings and the products in a groove are used as concentrate bauxite. By using the method, the floating ratios of target ores and non-target ores are increased, the non-target ores are more easily floated, the flotation index is increased, the operation is simple, the energy consumption is low and the handling capacity is large.

The invention provides a display panel, including a color filter substrate and a thin film transistor array substrate disposed oppositely, and a liquid crystal layer filled between the color filter substrate and the thin film transistor array substrate, wherein the thin film transistor array substrate includes a display area, a non-display area, and a plurality of photo sensors are disposed in the display area; the color filter substrate is formed with a plurality of light transmissive passages; the thin film transistor array substrate is disposed with a plurality of sub-pixels; and the photo sensor is configured for detecting position information corresponding to an external photoelectric signal when receiving the external photoelectric signal. The display panel is provided with a plurality of photo sensors, when the incident laser light is irradiated onto the photo sensor, the photo sensor can be triggered to work, and the laser projection position is determined.

The invention provides an ablation-resistant / bearing integrated air inlet and an integral forming method, which comprise the following steps: step 1, forming an ablation-resistant layer preform, comprising: 1.1 dividing the ablation-resistant layer into a plurality of block structures based on the structure of the ablation-resistant layer; 1.2 on the basis of any block structure, adopting a prepreg layering and curing process of an ablation-resistant layer in a mold, and obtaining a plurality of pre-cured block structures, wherein the prepreg is not completely cured; 1.3 overlapping and bonding a plurality of pre-cured block structures on a male die according to the structure of the ablation-resistant layer to obtain an ablation-resistant layer preform. Step 2, layering the prepreg of thebearing layer on the ablation-resistant layer preform, and co-curing the whole layered structure after the layering is finished, wherein the curing system of the prepreg of the ablation-resistant layer is the same as that of the prepreg of the bearing layer. Step 3, demolding after cooling. The method disclosed by the invention solves the problems of complex forming mode of an existing air inlet,easy layering of the interface of the ablation layer and the bearing layer, and poor overall reliability.

The invention discloses a method for producing biogas from fruit and vegetable wastes. The method is characterized by comprising the following steps: (1) raw material pretreatment: grinding the fruit and vegetable wastes in a ball grinder to damage the difficultly degraded cellulose structure, releasing the bound water in the raw material and the intracellular water and the intracellular matter in the plant cell, and finally putting the obtained pasty effluent in a storage tank to store; (2) solid-liquid separation and coupling: performing solid-liquid separation on the pasty effluent to obtain a fruit and vegetable juice and a solid residue, wherein the fruit and vegetable juice comprises plenty of soluble carbohydrates (mainly comprising monosaccharide and polysaccharide) and easily biodegradable components for methanation processing; the solid residue is mainly rich in cellulose content; acid liquor containing plenty of volatile organic acids is obtained through a high-solid-concentration hydrolysis acid production reaction, a proper substrate is provided for the methane production process, and then the two-phase anaerobic system has a high gas production performance.

The invention provides a mine tray for prejudging the magnitude of anchoring force on the basis of surface deformation and a monitoring method. According to the mine tray, a tray body comprises a spherical-crown-shaped part and a flat plate part; a deformation recognizing unit comprises four strip-shaped plastic thin pieces which form a cross shape and are attached to the surface of the spherical-crown-shaped part, one end of each strip-shaped plastic thin piece starts from the edge of an anchor rod hole, and the other end of each strip-shaped plastic thin piece extends to the edge of the spherical-crown-shaped part; each strip-shaped plastic thin piece is composed of a green section, an orange section and a red section, the surface of each strip-shaped plastic thin piece is coated with areflecting film material and covered with a fin unit, and the fin unit is composed of multiple rows of rectangular small plastic pieces distributed in the length direction of the strip-shaped plasticthin piece. The method includes the steps of calibrating the mine tray through a compression testing machine, installing mine trays produced in the same batch as the calibrated mine tray on site, andestimating the magnitude of the anchoring force. By means of the tray and the method, the stress conditions of a corresponding anchor rod or anchor cable can be conveniently and visually prejudged, and the labor intensity and monitoring cost of monitoring staff can be remarkably reduced.

The invention provides an airport navigational light sensing system based on a distant field recognition technology of Internet of things. The airport navigational light sensing system is characterized by comprising RFID (Radio Frequency Identification) electronic tags arranged on all navigational lights in an airport, wherein the identification numbers and maintenance information of the navigational lights corresponding to the RFID electronic tags are stored in the RFID electronic tags at least; the RFID electronic tags establish a wireless data interaction channel with RFID handheld read-write equipment through setting a frequency; data interaction is carried out between all the RFID handheld read-write equipment and a background server through a wireless network or data line; working staff of the airport accesses the background server through a PC (Personal Computer) to operate. The invention also provides a method. By using the airport navigational light sensing system and method, the sensing management efficiency of runway navigational light equipment can be greatly increased, the maintenance time can be greatly shortened, and the operation cost can be reduced. Meanwhile, the blank of informationized sensing management for the airport navigational light equipment at home and abroad is filled up.

The invention relates to a large-sized amphibious aircraft overwater side-tilting airborne rescue system. The system comprises characteristic fairings (1) and airbags (3) and is characterized in thatthe fairings (1) are symmetrically installed at the wing tips of left and right wings (2), the airbags (3) are installed in the fairings, and one end of each airbag (3) is connected with the wing tipof the corresponding wing; the fairings adopt a throw design, and after the wing tips of the wings (2) are in contact with water, the fairings (1) can be partially or wholly thrown away; at this time,the airbags (3) are inflated and opened to generate buoyancy for the wings. Under the condition that a large-sized amphibious aircraft side tilts on the water, the airborne rescue system can be utilized for automatic self-rescue, the survivability of the aircraft is greatly improved, and valuable time can be saved for subsequent rescue carried out for the aircraft.

The invention discloses a high-strength high-temperature-resistant composite material air inlet channel and a forming method thereof, and belongs to the technical field of composite materials. The wall surface is divided into a plurality of profiling cloth layers according to the wall surface thickness of the air inlet channel to be formed; outward deviation of the thickness of a single layer is sequentially carried out according to the molded surface of the air inlet channel, the contour shape of each profiling cloth layer is obtained, and each profiling cloth layer is woven through continuous fibers according to the contour shape of each layer; multiple layers of profiling cloth are sequentially laid on an air inlet channel male mold, and every two adjacent layers are connected through continuous fiber bundles in a sewing mode during laying; after a female mold and the male mold are assembled, resin is injected from a glue injection opening of the mold, and curing molding is conducted through a resin transfer molding process; and demolding is carried out after cooling, and heat treatment is carried out to obtain the high-strength high-temperature-resistant composite material air inlet channel. The high-strength and high-temperature-resistant air inlet channel is formed by adopting the composite materials, and the problem that the material selection and the forming process of the air inlet channel are limited is solved.

The invention relates to a low-yield-ratio high-strength pipeline steel production method. The method includes the working processes of steelmaking-continuous casting, casting blank heating, casting blank control rolling, steel plate control cooling and straightening through a straightening machine; in the working process of rolling, during austenite crystalline region elongation rolling, the single track reduction rate is not lower than 16%, the accumulated valid reduction rate is not lower than 70%, and the austenite crystalline region single track reduction rate is not higher than 18%; and in the working process of control cooling, the austenite crystalline region rolling starting temperature is lower than Ar3 temperature by 20 DEG C to 30 DEG C, the rolling temperature scope is located in an austenite and ferrite coexistence region, the cooling starting temperature is lower than the Ar1 temperature, and large phase change stress is prevented from being generated in the cooling process. A pipeline steel product produced through the process has the high strength, and meanwhile has the good tenacity and the excellent yield ratio scope; and the contradiction of high strength and low yield ratio of the iron and steel industry pipeline steel series products is solved, and the best level of similar enterprises in China is achieved.

The invention relates to an interplanting method of blueberries and Stylosanthes guianensis and belongs to the technical field of agricultural planting. The method includes the steps of firstly, selecting seeds, to be more specific, screening out good blueberry and Stylosanthes guianensis seeds; secondly, selecting land and preparing soil; thirdly, transplanting and planting, to be more specific,planting the good blueberry seeds screened out in the first step on planting rows prepared in the second step in spring; planting the Stylosanthes guianensis on two sides of the blueberries in May; fourthly, performing field management, to be more specific, performing weeding, irrigation, pruning, fertilizing, disease and pest control, cutting and seedling supplementing on the planted blueberriesand Stylosanthes guianensis. The method has the advantages that interplanting is utilized, weeds can be covered and inhibited, humus is increased, nitrogen fixation is performed to increase soil fertility, soil temperature is regulated, and accordingly the growth of the blueberries in high-temperature regions is improved.

The invention, which relates to the technical field of the lifesaving apparatus, discloses an automatic transmission and installation system for cabin vibration testing. The system comprises an L-shaped fixed cabin clamp, a clamping and grabbing tool, a robot, a robot control system, a robot guide rail, a vibration table and a vibration test isolation room. The robot is installed on the guide rail, the robot integrates an intelligent visual system with photographing and motion control functions and a grabbing and fastening tool. A conveying guide rail is of a structure with a rack and has a motor-driven gear and rack pair transmission function. The L-shaped fixed cabin clamp realizes the flexibility of a vibration test unit by replacing the cabin fixed clamp; the robot control system is aservo control and safety linkage protection system for robot movement. The automatic transmission and installation system is a cabin vibration test automatic transmission and installation intelligentunit system integrating flexibility, automation and informatization, meets the operation improvement requirement that manual operation is not needed in the operation process, improves the safety, andimproves the production efficiency.

The invention discloses a system and method for treatment of waste ammonia distillation liquid through a combination of a calcium remover and a nano-filtration membrane. The system for treatment of the waste ammonia distillation liquid comprises a waste ammonia distillation liquid adjusting pond, a gypsum reaction pond, a calcium remover dissolving pond, a gypsum dewatering and drying device, a calcium carbonate reaction separation device, a calcium carbonate dewatering and drying device, a nano-filtration membrane system and a reuse water storage pond; the method for treatment of the waste ammonia distillation liquid comprises the steps of (1) preparation of gypsum slurry; (2) preparation of a gypsum product; (3) calcium carbonate separation; (4) preparation of a light calcium carbonate product; (5) nanofiltration separation and reuse. The treatment technology is simple and low in equipment investment, reduces cost, saves resources, achieves zero discharging of wastewater and is safeand friendly to the environment.

The invention discloses a method for producing chromium oxide green by using chromium sulfate basic. The method comprises the steps of mixing chromium sulfate basic, ammonium sulfate and sulfur in certain proportions, roasting for 30-60min at temperature being 1000-1200 DEG C, washing with water, drying and crushing to obtain ultrafine chromium oxide green products with concentrated particle size. By adopting the method to produce the chromium oxide green, not only can chromic anhydride leftovers and wastes be utilized and can the production cost be reduced, but also a very good demonstration effect is taken in the aspect of environmental protection. Moreover, the particle size of the produced chromium oxide green is concentrated, the chromium oxide green is obviously finer than chromium oxide green which is produced by adopting the traditional process and the chromium oxide green is more suitable for application to ceramic pigment and the polishing field. By converting low-added-value chromium sulfate basic into high-added-value chromium oxide green, an effect of protecting the environment is taken at the same time and a very good demonstration effect is taken in the chromium salt production field. Besides, the goals of economy and environmental protection are achieved.

The invention relates to the technical field of blast furnaces, in particular to a method and device for promoting rapid temperature rise of a blast furnace hearth. The device comprises a sleeve, a low-pressure oxygen joint, a compressed air joint and a tapping machine shank; the front portion of the sleeve extends into the blast furnace hearth from a blast furnace tap hole, the position between the front portion of the sleeve and the blast furnace tap hole is filled with a sealing material, the sleeve comprises an inner sleeve body and an outer sleeve body, and blind plates are fixedly arranged at the ends of the inner sleeve body and the outer sleeve body to block the inner sleeve body and the outer sleeve body; the low-pressure oxygen joint and the compressed air joint are fixedly arranged at the rear portion of the sleeve and positioned outside the blast furnace tap hole, wherein the low-pressure oxygen joint penetrates through the outer sleeve body to extend into the inner sleevebody, and the compressed air joint extends into a gap between the outer sleeve body and the inner sleeve body; and the tapping machine shank is fixedly connected to the rear end of the sleeve and provided with an external thread. According to the device and method, the continuous oxygen supply and the reduce the consumption of oxygen steel pipes can be ensured, and the quick temperature rise and the environmental protection are realized.