193results about How to "Environmental advantages are obvious" patented technology

A laser cladding process of the wear-resisting anticorrosive coating of a hydraulic pressure support pillar cylinder barrel or a piston rod cylinder barrel comprises procedures as follows: the surfaces of the standing pillar cylinder barrel and the piston rod cylinder barrel are pretreated; the surfaces of the standing pillar cylinder barrel and the piston rod cylinder barrel are decreased, de-rusted and cleaned up by alcohol under room temperature; alloying powder is chosen and an automatic powder feeder is adjusted; the iron base alloying powder with good wear-resisting anticorrosive property and sound metallurgy compatibility with a matrix is selected and the iron base alloying powder contains major constituents, including Fe, C, Cr, Ni, Mo, Si, N, Nb, Ta and B; and at last, the automatic powder feeder is adjusted. Adjusting the automatic powder feeder can lead the alloying powder from an automatic feeding end to a laser melting pool and feeding amount is adjusted so that the thickness of the alloying coating reaches 0.6mm to1.2mm. The alloying coating of the invention is even and dense and has good wear-resisting anticorrosive property. Compared with galvanization, the wear-resisting anticorrosive property and the service life of the standing pillar cylinder barrel and the piston rod manufactured by the invention are greatly improved.

The invention discloses a low-temperature carbonization apparatus and method for oil sand, oil sludge, oil shale and biomass. The apparatus comprises a delivery apparatus, a storage bin, a metering apparatus, a drying furnace and a surge bin. The method comprises the following steps: drying, preheating, carbonizing, and cooling. The core of the invention is an external heating type rotary carbonization furnace which realizes the pyrolysis of oil sand, oil shale, oil sludge (oil sludge on the ground, oil sludge at the bottom of a tank and oil-containing sludge from oil refinery) and biomass, and the product is high in purity and low in loss. The invention effectively solves the problems of solid materials such as adhesion, wall accretion and the like in the pyrolysis process by material returning. The technology provided by the invention is simple in process and reliable and stable in operation, and has obvious advantages in the treatment of small particle materials such as oil shale, oil sand, oil sludge (oil sludge on the ground, oil sludge at the bottom of a tank and oil-containing sludge from oil refinery), biomass and the like.

The invention relates to a bamboo-structure single-layer spherical latticed shell and an assembling method. The bamboo-structure single-layer spherical latticed shell structurally comprises L bamboo rod pieces, M bamboo connecting pieces and N fixed hinge supports, wherein a single-layer spherical latticed shell main body is formed in a way that two ends of each radial bamboo rod, each weft bamboo rod and each diagonal bamboo rod of the L bamboo rod pieces are connected through the bamboo connecting pieces; the bamboo connecting pieces comprise steel inserting pieces, hollow balls, stiffening steel sheets and bolts; arc-shaped notches are reserved at one ends of the steel inserting pieces and are welded on the hollow balls; bolt holes are reserved at the other ends of the steel inserting pieces, and the bolts are respectively connected to the radial bamboo rods, the weft bamboo rods and the diagonal bamboo rods through the bolt holes; the stiffening steel sheets are welded in connecting positions between the steel inserting pieces and the radial bamboo rods, the weft bamboo rods as well as the diagonal bamboo rods; the upper ends of multiple fixed hinge supports are arranged on the hollow balls of the bamboo connecting pieces which are arranged at the bottom part, and the lower ends of the multiple fixed hinge supports are arranged at the top part of a supporting structure which is arranged at the lower part. The bamboo-structure single-layer spherical latticed shell disclosed by the invention has the advantages that the self weight is light, the construction is convenient, the structural stress is reasonable, the safety is high, the connecting joint is simple and reliable, the maintenance is easy, and environment-friendly effects are realized.

The invention provides a preparation method of a hydrophobic polymer film material. The material comprises the following components in parts by weight: 100 parts of a polymer; 0.5-25 parts of micro-nano particles; and 0.5-30 parts of other auxiliary agents. The preparation step comprises: melt-mixing the polymer, the micro-nano particles and the other auxiliary agents, performing extrusion, calendering or tape casting to form a film blank, and then performing stretching; and forming micro-nano protrusions and cavity rough surface structures after stretching to obtain the hydrophobic polymer film material. The water contact angle of the material is 120 degrees or more, and the rolling angle is 15 degrees or less.

The invention provides a two-component waterborne polyurethane industrial paint with the excellent physical performance. According to the industrial paint, mixed hydroxyl resin of waterborne acrylic resin emulsion and waterborne polyurethane resin is adopted as a main film forming agent, an environment-friendly organic bismuth and organic zinc composite catalyst and other auxiliaries are adopted, a sulfonate modification HDI trimer is adopted as a curing agent, uniform dispersion can be achieved without hydrotropy agents, an obtained paint film is excellent in hardness and scratch resistance, and the ultra-strong adhesive force and impact resistance are achieved. The two-component waterborne polyurethane industrial paint is a quick-drying waterborne two-component polyurethane coating, the drying speed is increased by three times compared with the drying speed of general industrial paint products, the outstanding environment-friendly advantage is achieved, and TVOC can be controlled to be 65 g / L or below. The invention further provides a preparation method of the two-component waterborne polyurethane industrial paint with the excellent physical performance.

The invention relates to an omni-directional inerting safety protection device of a sealed coal bunker, belongs to the technical field of safety protection of sealed coal bunkers and aims to solve the problem that the inerting effect of the inside of sealed coal bunkers in the prior art is not ideal. The provided omni-directional inerting safety protection device of the sealed coal bunker comprises a coal bunker body, a lift, pressure relief anti-explosion doors, a material inlet, a temperature sensor, a combustible gas sensor, a smoke sensor, guide ways, a movable gas exchange loop, a fixed gas inflation loop, an inert gas storing tank, valves, a pressure reliever, a clean water storing tank, a pressurization device, a coal bunker outlet gas locking device, a fine water mist dust removal cooling device, gas inflation steel cables and laser distance measuring sensors. According to the omni-directional inerting safety protection device of the sealed coal bunker, the inflation mode of various inert gases is adopted, the fixed gas inflation loop on the wall surface and the gas inflation steel cables are included, and therefore, the problem of non-uniform inerting of the inside of the coal bunker can be effectively solved.

The invention provides a refrigerant composition. The refrigerant composition contains the following components, in percentages by mass: 1%-98% of 1,1,2-trifluoroethylene (R1123), 1%-88% of difluoromethane (R32) and 1%-48% of trifluoroiodomethane (R13I1) or 1%-12% of 1,1,1,2,2-pentafluoroethane (R125). The refrigerant composition has a GWP of 600 or less, an ODP of 0, and obvious environment-friendly advantages; and in addition, the refrigerant composition has good thermal performance and is used for the household air conditioning unit, the capacity and energy efficiency of the household air conditioning unit using the refrigerant composition are equivalent to those of a household air conditioner using an R410A refrigerant, and the can refrigerant composition replace the R410A working medium without any change of the household air conditioning system.

The invention belongs to the technical field of papermaking, relates to a production method for craft paper, and aims to solve the problem of difficulty in the production of feather-weight, strong-strength and high-whiteness craft paper under the condition of not using wood pulp. The production method for the craft paper comprises steps of a MOW pretreatment step for forming surface pulp and lining pulp, an OCC pretreatment step for forming core pulp and prime pulp, and a step for subsequently treating the surface pulp, the lining pulp, the core pulp and the prime pulp, and is characterized in that the MOW pretreatment step comprises the following steps: a, simultaneously performing pulping and biological enzyme deinking on MOW, and b, performing heat dispersion on MOW, wherein the step a comprises a step of adding 1,600 to 1,800 IU / ml cellulase, Na2SiO3 and NaOH into MOW pulp at the mass concentration of 10 to 15 percent for pulping under the condition of 40 to 50 DEG C, wherein the mass concentration of the cellulase, the Na2SiO3 and the NaOH is 0.01 to 0.05 percent, 0.5 to 1.0 percent and 0.5 to 1.0 percent respectively, and the pulping time is 10 to 20 min. Due to the adoption of the technical scheme, the method can effectively solve the technical problem.

The invention relates to a hydraulic-typed natural gas automobile gas-adding sub-station, comprising a CNG sub-station trailer, a sub-station prizing body, a PLC control cabinet, wind air source equipment, a gas alarm and a gas adding machine; the CNG sub-station trailer is fixed with 8 independent pressure vessels; the front end of each pressure vessel is respectively fixed with a pneumatic air outlet valve and the rear end thereof is respectively fixed with a pneumatic oil inlet valve and a pneumatic oil returning valve in parallel; the pneumatic air outlet valve, the pneumatic oil inlet valve and the pneumatic oil returning valve are respectively communicated with the gas adding machine and the sub-station prizing body by pipelines; the sub-station prizing body comprises a prizing body, a liquid storage tank, a pressurization system, a medium liquid and an exhaust device. The hydraulic-typed natural gas automobile gas-adding sub-station has the advantages of little investment of CNG sub-station construction, high working capacity, high gas yield, low running expense, automatic control, extremely little maintenance, and stable running.

The invention discloses a preparation method of copper chloride hydroxide. The method comprises the following steps: adding copper hydroxide slurry in copper chloride solution according to a ratio of 2.5-3.5:1, reacting under the condition that the temperature is 80-160 DEG C, the pH value is 4-9 and the pressure is 0-600kPa, obtaining the reaction product after the reaction; and rinsing, centrifuging and drying the reaction product to obtain copper chloride hydroxide. The method of the invention has simple and safe operation, less waste discharge, lower production cost, more complete resource utilization and less environmental pollution.

The invention discloses a biochar pulp prepared from garbage leachate serving as a raw material and a preparation process thereof, and aims to provide the biochar pulp prepared from the garbage leachate serving as the raw material and the preparation process thereof, which have the advantages of the combination of energy saving and emission reduction and environmental management and low cost. Thepreparation process comprises the following steps of: mixing biochar, the garbage leachate, methanol, high-temperature sand and additives serving as raw materials; and crushing, homogenizing and filtering the mixed raw materials to prepare the biochar pulp. The biochar pulp is used for replacing fuel oil so as to effectively save energy and reduce fuel cost, plays a good part in managing urban environment, and fulfills the aims of promoting economic and environmental health and sustainable development. The biochar can be widely applied in the fields of substitute oil firing such as industrialboilers, power station boilers, industrial furnaces and the fields of urban environment management and the like.

The invention discloses an internal heat rotary kiln coal dry distillation device comprising a kiln body (4) with a feeding device (1) and a discharge device (5) respectively arranged on the two ends. The kiln body (4) has a sealed structure. A heating device (6), a rotation stabilization device (2) and a transmission device (3) are respectively arranged on the kiln body (4). The kiln body (4) is cylindrical. A pipe rack spiral plate (7) and a heating device (6) are arranged in the kiln body (4). The kiln body (4) is inclined towards the end provided with the discharge device (5), such that the kiln body end with the feeding device (1) is higher than the end with the discharge device (5). The internal heat rotary kiln coal dry distillation device provided by the invention has a simple and fully sealed structure. With the device, continuous production can be realized, and no dust, coal gas or pollutant is discharged to the surrounding environment during a dry distillation process. With the device, the production efficiency is greatly higher than that of prior arts.

A multi-freedom-degree controllable mechanism type garbage loader comprises a garbage loading system, a cab and a vehicle chassis. The garbage loading system comprises a multi-freedom-degree controllable loading mechanism, two speed reducer power source groups and a machine frame. The vehicle chassis can achieve the functions such as moving forwards, moving backwards, steering and braking, and the working requirements of the garbage loader are met. According to the multi-freedom-degree controllable mechanism type garbage loader, various flexible complex loading actions can be completed like a hydraulic loader, the shortcomings that a hydraulic system is high in manufacturing cost, low in transmission efficiency and high in maintaining cost, and oil leakage can easily happen are overcome, the multi-freedom-degree controllable mechanism type garbage loader has the advantages of being high in reliability and high in efficiency, energy is saved, and the multi-freedom-degree controllable mechanism type garbage loader is very suitable for city cleaning work.

The invention provides a bamboo latticed shell hollow sphere connecting joint welded with steel insertion sheets and an installing method. The bamboo latticed shell hollow sphere connecting joint comprises M steel insertion sheets, M bamboo rod pieces, M or M-1 reinforced steel sheets, a hollow sphere and 2M bolts, wherein a circular-arc gap is reserved in one end of each steel insertion sheet; a bolt hole A is reserved in the other end of each steel insertion sheet; one end of the circular-arc gap reserved in each steel insertion sheet is fixed together with the hollow sphere by welding; a groove and a bolt hole B are reserved in the end part of the each rod bamboo rod piece; one end, where the bolt hole is reserved, of each steel insertion sheet is inserted into the groove reserved in each bamboo rod piece; the bolt hole A reserved in each steel insertion sheet is aligned with the bolt hole B reserved in each bamboo rod piece; each bolt hole A and bolt hole B are fixed by using two bolts; the reinforced steel sheets are welded on the steel insertion sheets between the bamboo rod pieces and the hollow sphere. The bamboo latticed shell hollow sphere connecting joint has the advantages of simple structure, easiness in positioning and installing, clear force transmission, high integrity, easiness in maintaining and environmental friendliness; bamboo belonging to an environment-friendly renewable resource is taken as the rod piece material of the latticed shell connecting joint, so that an outstanding environmental protection advantage is achieved.

The invention discloses a mechanical auxiliary overcooling CO2 cross-critical heat pump heating system. The system comprises a mechanical auxiliary overcooling heat pump system and a CO2 heat pump system; backwater of a heating radiator flows into a condenser to be heated through a three-way valve and then flows into a mixing tank; a refrigerant flowing out of a cooling evaporator flows into the condenser to be cooled through an auxiliary circulation compressor, and then flows into the cooling evaporator through an auxiliary circulation throttling valve; CO2 heat flows out of an evaporator, passes through a compressor then enters a gas cooler, then enters a pipeline which is provided with the evaporator and a throttling valve to enter the evaporator; and the backwater of the heating radiator flows into the gas cooler to be heated through the three-way valve and then flows into the mixing tank, and the mixing tank is connected with an water inlet of the heating radiator through a pipeline. According to the system, CO2 at an outlet of the gas cooler of a CO2 system is overcooled through a mechanical overcooling system, so that the temperature of CO2 before the COW2 entering the throttling valve is reduced, throttling loss is reduced, and therefore the operation high-pressure of the CO2 is reduced, and efficient operation of the CO2 heat pump system is ensured.

The invention provides quick-drying type water-borne mental corrosive-resistant paint and a preparation method thereof. The quick-drying type water-borne mental corrosive-resistant paint is prepared from an ingredient A and an ingredient B, wherein the ingredient A is prepared from water-borne acrylic resin emulsion and water-borne modified fatty amine curing agent blended resin; the ingredient B is epoxy resin. A water-borne epoxy technology and a water-borne acrylic technology are creatively compounded and applied, so that a product has a long activation period and fast drying speed; the construction is convenient; healthy and environment-friendly effects are achieved; a paint film has the performance advantages such as high hardness, high impact resistance and excellent adhesive force; the quick-drying type water-borne mental corrosive-resistant paint can be widely applied to decoration and protection of metal substrates such as galvanized plates, tinplate, stainless steel and aluminum-plastic plates.

The invention discloses a method for preparing harmless rock fragments by using well drilling waste liquid and an application of the rock fragments. The method comprises four steps of separation, oil removal sedimentation, oxidation sedimentation and oxidation adsorption to ensure that the well drilling waste liquid is subjected to harmless treatment, the harmless rock fragments can be separated from the well drilling waste liquid, and the rest is water which can reach an industrial water standard. The harmless rock fragments treated by a harmless technology are used as main materials for preparing dry-mixed mortar. By adopting the method, the phenomena that the petroleum drilling enterprises in the past dig pits for landfill of harmful mixed wastes, the soil is destroyed, the environment is polluted and resources are wasted are avoided; and moreover, a precedent for carrying out harmless comprehensive treatment, recycling waste mixed resources, and promoting the development of cyclic economy for the petroleum drilling enterprises to make money is opened up for the petroleum drilling enterprises, and the method meets the requirements of the strategic planning of energy saving and emission reduction comprehensive utilization during the twelfth five-year of the country. The method has considerable economic benefits and wide market application prospects.

The invention discloses an organic phosphoric acid compound, a synthesis method of the compound and application of the compound as a chalcopyrite collector. The synthesis method of the organic phosphoric acid compound comprises the steps that an organic carboxylic acid compound and phosphorous acid are subjected to a condensation reaction under the function of phosphorus pentoxide, and a product of the condensation reaction is hydrolyzed by water vapor, separated and purified to obtain the compound. The organic phosphoric acid compound is used for the flotation of chalcopyrite, the selectivityof the compound is high, the agent use amount is small, the cost is low, flotation indexes are stable, and efficient flotation separation can be carried out on chalcopyrite and pyrite.

The invention provides an anti-impact high-weather-resistant water-based industrial paint and a preparation method thereof. The anti-impact high-weather-resistant water-based industrial paint uses main body resin polyurethane modified acrylate emulsion and auxiliary resin waterborne polyurethane dispersion for proportion and cooperation; nanometer silicon dioxide inorganic ultrafine materials are introduced; pigment and filling materials are graded, and functional environment-friendly antirust pigments are added; novel substrate wetting and shrinkage-proof auxiliary agents and the like are introduced. A coating of the anti-impact high-weather-resistant water-based industrial paint has the advantages of excellent anti-impact performance, weather resistance, anti-corrosion performance, chemical resistance, high hardness, strong attaching force and good anti-scratching performance; in addition, health and environment-friendly performance are realized; the construction is convenient.

The invention discloses a vapor compression assisted undercooling CO2 automotive air conditioning system. The vapor compression assisted undercooling CO2 automotive air conditioning system comprises a non-azeotropic mixture vapor compression assisted refrigerating system and a CO2 transcritical refrigerating system; the non-azeotropic mixture vapor compression assisted refrigerating system is composed of an assisting system compressor, an undercooler, a throttle valve and the condenser which are sequentially connected; the CO2 transcritical refrigerating system is composed of a main circulating compressor, a gas cooler, an undercooler, a throttle valve and an evaporator which are sequentially connected. According to the vapor compression assisted undercooling CO2 automotive air conditioning system, refrigerant at the outlet of the gas cooler is undercooled through assisted circulation, CO2 at the outlet of the gas cooler can be cooled through low-capacity assisted circulation, the cooling process is easy to implement, the temperature of the CO2 can be reduced below ambient temperature, and irreversible loss during a high-pressure CO2 throttling process can be significantly reduced.

The invention dicloses a mushroom scrap spray-drying system, which comprises atomizing equipment, drying equipment and material recovery equipment, wherein a charging pump is communicated with the feeding port of a supercentrifuge atomizer, the discharge port of the supercentrifuge atomizer is communicated with the upper end of a drying tower, and an injection head cooling fan is arranged at the discharge port of the supercentrifuge atomizer; a hot air distributor on the upper part of the drying tower is communicated with a combustion furnace through a settling chamber, and the outlet of the drying tower is communicated with the uppper part of a cyclone separator. By adopting the technical scheme of the invention, spray, drying, dedusting and material recovery are organically integrated, therefore, during mushroom scrap drying process, drying is more thorough, ratio of finished products is improved, and cost is lowered, exhaust emission is nearly zero, environment-friendly advantage is obvious.

The invention discloses a method for preparing rod-like boehmite powder by a gradient-heating hydrothermal process. The method comprises the following steps: adding a required reaction material into a hydrothermal reaction kettle liner, sealing, raising the reaction temperature to the set initial temperature, and keeping the temperature for some time; gradually heating to the set maximum reaction temperature by a gradient heating process; and keeping at the maximum temperature for some time, naturally cooling to room temperature, carrying out centrifugal separation on the precipitation product at a certain rotation speed, and repeatedly carrying out the after-treatment process composed of water washing, anhydrous ethanol washing, certain-temperature / time electric heating forced air drying and the like, thereby implementing the control on the boehmite powder shape, and successfully preparing the rod-like boehmite powder. The method has the comprehensive advantages of cheap and accessible raw materials, low cost, no need of any additive, simple shape control process, obvious environment-friendly advantage and the like. The prepared rod-like boehmite product has high dispersion uniformity. Thus, the method is an obvious creative synthesis route.

The invention discloses a refrigerator car refrigerating system based on engine waste heat recycling. The refrigerator car refrigerating system based on engine waste heat recycling is composed of an engine waste heat temperature differential power generation system and a CO2 refrigerating system; the engine waste heat power generation system comprises an internal combustion engine, an exhaust pipe, a temperature differential power generation module, a storage battery set and a storage battery management control system which are sequentially connected, and the CO2 refrigerating system comprises a compressor, a gas cooler, a temperature differential refrigerating module, a throttling valve and an evaporator which are sequentially connected; and a compressor gas outlet is connected with a gas cooler gas inlet, an evaporator gas outlet is connected with a compressor gas inlet, and the storage battery set is connected with the temperature differential refrigerating module. According to the refrigerator car refrigerating system based on engine waste heat recycling, waste heat of tail gas of the internal combustion engine is recovered through the temperature differential power generation module and converted to electric energy, and the part of electric energy is used by the temperature differential refrigerating module to further cool a refrigerant at a gas cooler outlet; and the refrigerating capacity is increased, the property of the refrigerating system is promoted, oil consumption for driving the compressor is reduced, overall energy efficiency of a refrigerator car is promoted, and carbon emission is reduced.

The invention provides a car air-conditioning heat pump system adopting an environment-friendly refrigerant. The car air-conditioning heat pump system further comprises a compressor, an indoor side heat exchanger, a throttle valve and an outdoor side heat exchanger which are sequentially connected to form a closed loop, and the environment-friendly refrigerant adopted by the car air-conditioning heat pump system is prepared from four components in percentage by mass: 4%-8% of the first component, 4%-80% of the second component, 4%-88% of the third component and 4%-88% of the fourth component.GWP of the adopted refrigerant is less than or equal to 150, environment-friendly performance is good, and requirements of environment-friendly regulations in all global regions are met. Thermal performance of the car air-conditioning heat pump system is equivalent to or more superior to a refrigeration system heat pump system using R134a, and thus the car air-conditioning heat pump system adopting the environment-friendly refrigerant is used for replacing a car air-conditioning heat pump system adopting an R134a refrigerant.

The invention provides a 3-hydroxyacetophenone synthesis method. The method includes the steps that 3-hydroxybenzoic acid is subjected to hydroxyl protection through an esterification or etherification reaction, then a chloroformylation reaction and an alkylation reaction are conducted, finally hydrolysis is conducted, and the 3-hydroxyacetophenone is obtained. According to the method, raw materials are cheap, easy to obtain and wide in source, high-temperature and high-pressure operation does not exist, equipment requirement is low, and equipment investment is low; peroxide, heavy nitride and the like do not exist, and high safety is achieved; compared with a nitration-iron powder reduction-diazotization route commonly adopted in the nation, the synthesis method has huge environment-friendly advantages. Besides, according to the method, the amount of wastewater is less than 5% that of an original process, the total route yield is 90%, and the method has huge technological advantages.

The invention provides a refrigerant containing trifluoroiodomethane. The refrigerant comprises the following three components in percentage by mass: 36%-80% of a first component, 8%-60% of a second component and 4%-24% of a third component, wherein the mass ratio is based on the total mass of the refrigerant substance; the first component is trifluoroiodomethane (R13I1); the second component is amixture of any two components selected from trifluoromethyl methyl ether (RE143a), 1, 1-difluoroethane (R152a), trans-1, 3, 3-tetrafluoropropene (R1234ze (E)), 3, 3, 3-trifluoropropene (R1243zf), 2,3, 3, 3-tetrafluoropropene (R1234yf), isobutane (R600a), dimethyl ether (RE170) and fluoroethane (R161); the third component is one of dimethyl ether (RE170) and cyclopropane (RC270); and the GWP of the refrigerant is less than or equal to 150. According to the refrigerant, the problems that the refrigerant GWP replacing R134a in an existing automobile air conditioning system is high in GWP and low in the refrigerating capacity can be solved, and meanwhile the problem that the heat exchange efficiency is low due to large temperature slippage is solved.

The invention discloses a low alkane-to-olefin catalyst by dehydrogenation and a preparation method. The catalyst is loaded with nickel phosphide and alkaline metals by taking SiO2 spheres or active carbon spheres as a carrier, wherein the mass ratio of the carrier to Ni to the alkaline metals is 1: (0.02-0.2): (0.01-0.2) and the P / Ni molar ratio is 0.5-1.5. In the aspect of dehydrogenation performance of the low-carbon alkane of the catalyst, compared with commercially available d Pt-serial catalysts, the iso-butane conversion ratio is slightly high, and the iso-butane selectivity is equivalent. However, compared with the existing industrially applied PT-serial catalyst preparation process, the preparation cost is low. Compared with Cr-serial catalysts, the catalyst further has a good environmental-friendly advantage.

The invention discloses a method for leaching valuable metal from cobalt-copper white alloy. The method includes the following steps that (1) the cobalt-copper white alloy is melted into an alloy melt, wherein the cobalt-copper white alloy contains silicon and almost contains no manganese; (2) a Mn-containing material is added into the alloy melt, and meanwhile gas is led in for blowing and slagging; (3) obtained slag is separated from the melt; (4) the melt with the slag separated out is atomized into alloy powder, wherein the mass friction of Mn in the alloy powder is 0.5%-20%; and (5) the alloy powder is subjected to acid leaching, and the valuable metal is recovered. Due to the fact that the Mn-containing material is added and reacts with the silicon in the cobalt-copper white alloy to generate the MnO-SiO2 slag, the silicon removal effect is achieved, and the method has the beneficial effects of being good in silicon removal effect and small in valuable metal loss. Besides, the melting temperature is much lower than the melting point of CaO-(MgO)-SiO2 binary system or ternary system slag in the prior art.

The invention discloses physical-foaming silty lightweight solidified soil. The physical-foaming silty lightweight solidified soil comprises, by mass, 2-3.5% of foam, 80-85% of sludge slurry, 12-16% of inorganic composite curing agents, 0.1-0.2% of viscosity reducer and 0.2-0.5% of early strength agent. The invention further discloses a preparation method of the solidified soil. The lightweight solidified soil has the advantages of light weight, high strength, high stability, easiness in pumping, and the like; sludge is regarded as an important component of the lightweight solidified soil, theresource utilization of the sludge is realized, and the environmental protection advantage is prominent; the lightweight solidified soil can be used as filling soil to be backfilled for highway subgrades and abutments, retaining wall backs, underground projects and pipeline projects; the physical-foaming silty lightweight solidified soil is an environment-friendly building material.