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71results about How to "Reduce mix rate" patented technology

Mining method for multilayer fragile gently-inclined extra-narrow ore vein

The invention discloses a mining method for a multilayer fragile gently-inclined extra-narrow ore vein. According to the method, mining areas are divided along the ore body trend; mining area columns (5) are reserved among the mining areas; a mine slope (1) is arranged in each mining area column (5); one vein following combined roadway is arranged in the inclination direction every 20m to 40m; vein following cutting roadways (2) and cutting mine slopes (3) are excavated at the end part of a chamber in the trend direction and the inclination direction; and a first layered ore vein, a rock sandwich layer and a second layered ore vein are totally excavated in one step along the vein following cutting roadways (2) and the cutting mine slopes (3). In the backstopping process, different drilling and blasting parameters are adopted at the first layered ore vein, the rock sandwich layer and the second layered ore vein, rocks among the ore veins can be removed; the problem of ore mixing into the rocks is solved; and the ore dilution is reduced. The method provided by the invention is particularly applicable to the mining of the underground metal mine multilayer fragile gently-inclined extra-narrow ore vein and the ore vein easy to crush due to blasting disturbance; the simultaneous recovery of the multilayer ore vein is realized; and the problem of personnel operation and equipment operation space limitation is solved through full thickness mining.
Owner:河南发恩德矿业有限公司

Multilayer gently-inclined extremely-narrow vein stoping blasting technology

The invention discloses a multilayer gently-inclined extremely-narrow vein stoping blasting technology. In the technology, a top-to-bottom layer-by-layer blasting and layered stoping method is employed. An intensive blasthole (5) are dug in a first layered vein (1) and an upper rock layer boundary. First layered vein middle blasthole (6) are dug in the middle of the first layered vein (1). A vein and intercalated rock layer boundary blasthole (7) is dug in the boundary between the first layered vein (1) and an intercalated rock layer (2). An intercalated rock layer and vein boundary blasthole (9) is dug in the boundary between the intercalated rock layer (2) and a second layered vein (3). An intercalated rock layer middle blasthole (8) is dug in the middle of the intercalated rock layer (2). A vein and lower surrounding rock boundary blasthole (10) is dug in the boundary between the second layered vein (3) and the lower surrounding rock boundary. The technology can achieve synchronic recycle of multilayer veins. A buffer seam can weaken an effect of a blasting shock wave on surrounding rock during a stoping process and meanwhile intercalated rock can be directly removed so that a difficult problem that the intercalated rock is mixed with ores and an ore dilution rate is reduced.
Owner:SINOSTEEL MAANSHAN INST OF MINING RES +1

Recovery method of underground mine goaf remaining studs

The invention discloses a recovery method of underground mine goaf remaining studs. The recovery method comprises the following steps that an ore removal roadway is tunneled into a stub (16) on one side of a middle section transportation roadway (1) to reach an ore body hanging wall, and the top of the ore removal roadway is expanded by adopting a fan-shaped medium-length hole to form a horn-mouth-shaped bottom structure; a cutting raise (12) and a pedestrian ventilation raise (3) are arranged in the stud pillar hanging wall ore rock contact face and the footwall surrounding rock respectivelyand communicate with an upper middle section air return roadway, layered connection ways (9) are tunneled in the pedestrian ventilation raise (3) in the vertical direction at intervals of a certain height to reach the stud pillar footwall boundary, the operation links that upward parallel blast holes (11) are drilled layer by layer in circulating mode one by one from bottom to top, charging blasting, forced ventilation and caving ore discharging are conducted till whole interval column is completely mined, then the caved ore (7) is completely discharged through a carry-scraper and fills the goaf, the recovery rate of the stud ore is increased, the ore dilution rate is reduced, and the working environment of a working surface is improved.
Owner:SINOSTEEL MAANSHAN INST OF MINING RES +2

Ming method for stoping high-dipping thick orebody with medium and above stability in ore mass

The invention discloses a mining method for stoping a high-dipping thick orebody with the medium and above stability in an ore mass. The method comprises the steps that an inverted-stepped mining faceis arranged in the thickness direction of the orebody in an ore room, mining is advanced from bottom to top, the mining face part close to a hanging wall is ahead of the mining face part close to a lying wall by a certain height, the advanced mining height of the mining face part close to the hanging wall is utilized to provide an operation space, a shallow hole is drilled upwards in the operation space, and a horizontally parallel medium-length hole is drilled in the direction of the lying wall to blast and break ores; and an anchor rod is used for anchoring partial unstable rocks on the hanging wall in the operation space, a part of the mined ores is temporarily left in the ore room to serve as a protective bottom column and a buffer layer of the hanging wall and provide a standing platform for upward operation and temporarily bearing hanging wall rocks, and a large quantity of ores are removed after ore room exploration is completed. The mining method is beneficial for reducing mixing of waste rocks in the mining process of the high-dipping thick orebody and improving the recycling ratio of resources, the blackness of the ores is even, the stope preparation work amount is less,and rock drilling and blast working are easy to organize.
Owner:KUNMING METALLURGY COLLEGE

Household garbage fermentation and fertilizer making device and method

The invention discloses a household garbage fermentation and fertilizer making device and method. A device body is a fermentation bin. A feed inlet and an air outlet are formed in the upper portion of the fermentation bin. A feeding baffle is arranged at the feed inlet. The lower portion of the fermentation bin is provided with a liquid outlet used for draining percolate and a discharge outlet used for outputting fermented materials. A breaking device is arranged in the fermentation bin and composed of a plurality of sets of breaking blades distributed in a cross shape, and has two perpendicular rotary dimensionalities. Household garbage to be treated passes through a spiral conveying machine through the feed inlet to enter the fermentation bin where a hot water pipeline is laid, is broken and fermented and then enters a dehydration pelleting and drying system from the position of a discharge baffle. According to the household garbage fermentation and fertilizer making device and method, breaking, stirring, heating, fermentation, dehydration pelleting and drying are integrated, garbage is converted into fertilizer, the energy is nature is effectively utilized, the running cost is reduced, the resources are effectively utilized while the environment problem is solved, the garbage is made profitable, and a new approach for effectively treating household garbage is provided.
Owner:ZHEJIANG UNIV

Non-point pollution control system for combined sewer system and control method thereof

The invention discloses a non-point pollution control system for a combined sewer system and a control method thereof. The system comprises a trunk sewer, a storm-water sewer and rain and sewage pipes, and also comprises one or more unit areas, and a sewage pipe and a rainwater pipe are disposed in each unit area. Outlets of each sewage pipe and the corresponding rainwater pipe are communicated with an inlet of the corresponding rain and sewage pipe. Outlets of the rain and sewage pipes are connected with an inlet of the trunk sewer, and an outlet of the trunk sewer is provided with a sewage treatment plant. An outlet of the storm-water sewer is communicated with natural water. The non-point pollution control system is characterized in that the trunk sewer is provided with first rainwatertreatment systems, water inlets of the first rainwater treatment systems are communicated with the rain and sewage pipes, and drainage ends of the first rainwater treatment systems are respectively communicated with the trunk sewer and the storm-water sewer. The system and control method are simple in structure and convenient to construct, and efficient treatment of sewage and preliminary rainwater in regions divided by administrative functions in a city can be achieved just by building diversion treatment systems in the limited regions of municipal roads.
Owner:WUHAN SHENGYU DRAINING SYST

High-magnification monocrystal-like lithium nickel cobalt aluminate positive electrode material with coating layer and preparation method thereof

The invention discloses a high-magnification monocrystal-like lithium nickel cobalt aluminate positive electrode material with a coating layer and a preparation method thereof, the preparation methodcomprises the following steps: (1) uniformly mixing a cobalt nickel hydroxide precursor and aluminum hydroxide, then adding lithium hydroxide, and continuously mixing to obtain a mixture; and (2) putting the material into a high-temperature-resistant container, sintering in an oxygen-enriched environment, cooling to room temperature, and sieving to obtain the monocrystal-like lithium nickel cobaltaluminate positive electrode material, (3) mixing the material with cold water, and controlling the washing time and the drying temperature to obtain the washed monocrystal-like lithium nickel cobaltaluminate positive electrode material; and (4) uniformly mixing the materials with a coating agent, continuously sintering under an oxygen-enriched condition, cooling to room temperature, and sievingto obtain a finished product. According to the invention, the stability of the monocrystal-like lithium nickel cobalt aluminate positive electrode material can be improved, so that the cycle performance and the rate capability of the positive electrode material are improved.
Owner:NINGBO RONBAY LITHIUM BATTERY MATERIAL CO LTD

Method for producing enriched potassium chloride by downhole fractional decomposition of solid potash salt ore

The invention provides a method for producing enriched potassium chloride by downhole fractional decomposition of solid potash salt ore, belongs to the technical field of chemical mineral processing, and in particular relates to a dry mining process of land burial carnallite potash salt ore, and the dry mining process is one of technological processes for improving the mining capability of the potash salt ore and lowering the production and backfill cost of potassium chloride. The method comprises the following process flows: mining the land burial carnallite potash salt ore by a drill jumbo to obtain raw solid potash salt ore; sieving the raw potash salt ore for decomposition in a downhole closed-circuit manner; selectively grading to obtain enriched potassium chloride slurry; conveying the slurry to ground through a pump; and finally producing the potassium chloride product by a flotation system. The method provided by the invention has the remarkable beneficial effects that under the existing investment conditions of lifting the potash salt ore to the ground by a vertical shaft and then producing the potassium chloride, the potassium chloride slurry is enriched by directly adopting underground mining and vertical shaft facilities, thus greatly improving the capability of the existing solid potash salt ore for producing the potassium chloride and greatly lowering the production cost and tailings backfill investment. Therefore, the method is applicable to producing the potassium chloride fertilizer product by downhole dry mining and processing of the land burial carnallite potash salt ore, thus achieving high industrial popularization value.
Owner:YUNNAN CHEM RES INST

Cylinder head for arched combustion chamber and gasoline engine employing same

The invention discloses a cylinder head for an arched combustion chamber and a gasoline engine employing the cylinder head. The cylinder head comprises a cylinder head body, wherein a combustion chamber face is formed on the inner side of the cylinder head body; the combustion chamber face has an arched face structure consisting of smooth curved surfaces; the surface to volume ratio of the combustion chamber can be reduced further, the working efficiency of the gasoline engine is improved, and gas flow which enters the combustion chamber is subjected to resistance in different directions, so that fuel oil mixed gas can be well formed into turbulent flow and combusted fully; therefore, the fuel oil consumption rate is reduced effectively, combustion is facilitated, and CH+NO(x) emission can be reduced, and gasoline power is increased; and the emission reaches or even exceeds the environmental protection agency (EPA) standard in America. The power of a gasoline engine with the maximum power of 3.0 kW (the rotating speed is 3,600 rpm) can be increased to 3.5 kW and the emission is reduced from 9.0 g/kW.h to 8.0 g/kW.h; the power of a gasoline engine with the maximum power of 3.5 kW can be increased to 4.0 kW and the emission is reduced from 9.0 g/kW.h to 8.0 g/kW.h; and the emission of the two gasoline engines meets the standard of 10 g/kW.h in the EPA3 stage; therefore, the power increment and the emission reduction of the gasoline engine are obvious, and environmental protection is facilitated.
Owner:LONCIN MOTOR

Positive electrode active material of battery core, high-voltage high-magnification battery core and manufacturing method thereof

The invention relates to a positive electrode active material of a battery core, a high-voltage high-magnification battery core and a manufacturing method thereof. The positive electrode active material is modified nickel cobalt lithium manganate, wherein the modified nickel cobalt lithium manganate is of a single-crystal structure, and the modified nickel cobalt lithium manganate is one or more of doped nickel cobalt lithium manganate and coated nickel cobalt lithium manganate. The battery core comprises a positive electrode, a negative electrode and a diaphragm, and the battery core adopts afull-tab winding type structure in which the diaphragm, the positive electrode, the diaphragm and the negative electrode are connected; the positive electrode comprises a positive electrode binder, apositive electrode conductive agent, a positive electrode current collector and the positive electrode active material; and the negative electrode comprises a negative electrode active material, a negative electrode conductive agent, a negative electrode binder and a negative electrode current collector. According to the invention, the rate capability of the battery core can be improved, and theheating of the battery core at a high rate is reduced, so that the overall performance of the battery core is improved.
Owner:HUBEI RONGBAI LITHIUM BATTERY MATERIAL CO LTD

Sewage and rainwater separate drainage system and method for controlling same

The invention provides a sewage and rainwater separate drainage system which comprises a sewage main pipe, a rainwater main pipe, a rainwater pipeline and a sewage pipeline. The sewage main pipe is arranged on a municipal road, and a sewage treatment plant is arranged at an outlet of the sewage main pipe; the rainwater main pipe is arranged on the municipal road, and the tail end of the rainwatermain pipe is connected with natural water; the rainwater pipeline and the sewage pipeline are arranged in a unit region, and the sewage pipeline is connected with the sewage main pipe; a rainwater treatment system is arranged at an outlet of the rainwater pipeline and comprises distribution equipment, a regulation and storage facility and an online treatment facility; the rainwater pipeline is connected with a water inlet of the distribution equipment, a first water outlet of the distribution equipment is connected with the sewage main pipe, a second water outlet of the distribution equipmentis connected with the regulation and storage facility, a third water outlet of the distribution equipment is connected with the online treatment facility, and a fourth water outlet of the distributionequipment is connected with the rainwater main pipe. The sewage and rainwater separate drainage system has the advantages that the sewage and rainwater separate drainage system is simple in structureand convenient to construct, and only the distribution equipment, the regulation and storage facility and the online treatment facility need to be constructed in a limited region of a residential area, so that mixed sewage in the region of the residential area can be efficiently treated.
Owner:WUHAN SHENGYU DRAINING SYST

Mining method for treating goaf remaining intervening pillar by filling method

ActiveCN111706328AImprove ore recovery rateReduce ore dilution rateUnderground miningBlastingMining engineeringStructural engineering
The invention discloses a mining method for treating goaf remaining intervening pillars by a filling method. The method comprises the following steps of tunneling an ore removal roadway into an intervening pillar (16) on one side of a middle section transportation roadway (1) to reach an ore body hanging wall, and expanding the top of the ore removal roadway by adopting a fan-shaped medium-lengthhole to form a horn-mouth-shaped bottom structure; arranging a cut raise (12) and a pedestrian ventilation raise (3) in a intervening pillar hanging wall ore rock contact face and a footwall surrounding rock respectively, and enabling the cut raise (12) and the pedestrian ventilation raise (3) to communicate with the upper middle section air return roadway, and tunneling layered cross gateways (9)in the pedestrian ventilation raise (3) in the vertical direction at intervals of a certain height to reach the intervening pillar footwall boundary; and drilling upward parallel blast holes (11) layer by layer in circulating mode one by one from bottom to top, and performing the the operation links of explosive charging blasting, forced ventilation and caved ore discharging till the whole intervening pillars are completely mined; and completely discharging the caved ore (7) through a carry-scraper and filling the goaf. The recovery rate of the intervening pillar ore is increased, the ore dilution rate is reduced, and the working environment of a working surface is improved.
Owner:SINOSTEEL MAANSHAN INST OF MINING RES +2

Sewage and rainwater separate drainage system and method for controlling same

The invention provides a sewage and rainwater separate drainage system which comprises a sewage main pipe, a rainwater main pipe, a rainwater pipeline and a sewage pipeline. The sewage main pipe is arranged on a municipal road, and a sewage treatment plant is arranged at an outlet of the sewage main pipe; the rainwater main pipe is arranged on the municipal road, and the tail end of the rainwatermain pipe is connected with natural water; the rainwater pipeline and the sewage pipeline are arranged in a unit region, and the sewage pipeline is connected with the sewage main pipe; a rainwater treatment system is arranged at an outlet of the rainwater pipeline and comprises distribution equipment and a regulation and storage facility; the rainwater pipeline is connected with a water inlet of the distribution equipment, a first water outlet of the distribution equipment is connected with the sewage main pipe, a second water outlet of the distribution equipment is connected with the regulation and storage facility, and a third water outlet of the distribution equipment is connected with the rainwater main pipe. The sewage and rainwater separate drainage system has the advantages that thesewage and rainwater separate drainage system is simple in structure and convenient to construct, and only the distribution equipment and the regulation and storage facility need to be constructed ina limited region of a residential area, so that mixed sewage in the region of the residential area can be efficiently treated.
Owner:WUHAN SHENGYU DRAINING SYST

High-precision hot melt glue nozzle and hot melt glue gun

The invention discloses a high-precision hot melt glue nozzle. The high-precision hot melt glue nozzle is mounted on a glue gun body; the glue gun body is provided with a solution supply channel and a gas supply channel; the high-precision hot melt glue nozzle comprises a nozzle body and a core body, wherein a containing hole penetrating the upper and lower parts of the nozzle body is formed inside the nozzle body; the core body is matched with the containing hole and is closely embedded in the containing hole; a glue solution channel with an opening in the lower end surface of the core body is formed inside the core body; at least two gas channels extending to the lower end surface of the core body are formed in the peripheral surface of the core body; a gas channel is formed between the gas channel and the wall of the containing hole. The glue solution channel and the solution supply channel are communicated for outputting an glue solution line during operation, the gas channel and the gas supply channel are communicated for outputting gas flow, the glue solution line is output in a specific shape under the action of the gas flow, and the machining of the gas channel can adopt a mode of milling a groove in the conical peripheral surface of the core body to replace the traditional drilling mode, so that the formation mode of the gas channel is more accurate and efficient than the traditional drilling technology.
Owner:QUANZHOU NDC SPRAY COATING SYST FABTING
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