15results about How to "Smooth process" patented technology

The invention discloses a method for recovering valuable elements in liquid obtained after bauxite wet desulphurization, and relates to the technical field of bauxite resource utilization. Comprising the following steps: carrying out ceramic membrane filtration pretreatment on the bauxite wet desulfurization liquid to remove impurities; the silicon element is recycled in a targeted manner through a compound flocculation-calcination process to obtain the white carbon black; the iron element is recycled through ozone oxidation-ammonium bicarbonate precipitation, and high-purity iron oxide is prepared; separating and purifying an aluminum element through a seed crystal induction-calcination process to obtain metallurgical-grade aluminum oxide; a fluorine-containing precipitant is used for selectively precipitating and recovering magnesium element to obtain a high-quality magnesium salt product; and neutralizing the tail liquid, and discharging after reaching the standard. According to the method, accurate separation and high-valued utilization of four elements of aluminum, iron, silicon and magnesium are realized through a synergistic process of targeted recovery of silicon, gradient separation of iron and aluminum and selective precipitation of magnesium, and the problems of silicon resource waste, low element separation efficiency, insufficient product purity, secondary pollution and the like in a traditional process are thoroughly solved; all-component resource comprehensive utilization of desulfurized liquid resources is achieved.

This invention relates to the field of polymer materials technology, specifically to a method for preparing and applying a rigid polyimide foam reinforced with aluminum honeycomb. The method for preparing the rigid polyimide foam reinforced with aluminum honeycomb provided by this invention includes steps such as surface pretreatment of the aluminum honeycomb core material and fixing the pretreated aluminum honeycomb core material into a molding die. The rigid polyimide foam material reinforced with aluminum honeycomb obtained by this invention not only possesses high specific strength and high specific stiffness, but also inherits the excellent properties of polyimide foam such as high temperature resistance, flame retardancy, low smoke, and thermal insulation. The introduction of the aluminum honeycomb skeleton also improves the material's impact resistance and dimensional stability, making it an ideal multifunctional integrated lightweight structural material with promising application prospects.

The application belongs to the technical field of MAX phase material preparation, and particularly relates to a method for preparing MAX phase material based on natural metal minerals. The method comprises the following steps: mixing natural metal mineral powder, aluminum powder and graphite powder, and then ball milling to obtain activated precursor powder; pressing the activated precursor powder into a dense blank, and synthesizing a block material through self-propagating high-temperature reaction; crushing the block material and sieving to obtain a MAX phase powder material, wherein the natural metal mineral is rutile and / or chromite; and the general formula of the MAX phase powder material is (Ti 1‑x Cr x ) n+1 AlC n , wherein 0<=x<=1, and n is 1 or 2. The method is different from the prior art in reaction principle, realizes cost reduction and greenization of the whole chain of raw materials, synthesis and etching, and solves the problem of mineral impurities by using the instantaneous high-temperature characteristics of SHS.

According to the microbial agent, the preparation method thereof and the bio-fertilizer prepared from the microbial agent, the microbial agent is produced through the processes of fermentation, centrifugation, dissolving and mixing, spray drying and the like, the loss of viable bacteria in the process from fermentation completion to dry powder preparation is reduced, and the yield of the microbial agent is improved. The performance of the microbial agent is improved. According to the bio-fertilizer, the microbial agent is used as a core raw material, humic acid, seaweed extract and biochar are used as auxiliary materials, the biocontrol and growth promoting functions of the microbial agent and the soil improvement and growth promoting functions of the base material can be mutually enhanced, the environment which is not beneficial to crop growth such as salt and alkali can be effectively resisted, and the yield of crops is increased.

The utility model relates to a kind of for large castings multiple large iron type's sand-coated molding line, it belongs to mechanical field.The utility model includes iron type and model heating furnace device, iron type and model mould drawing separation mechanism, iron type sand shooting sand-coated device, iron type and model grabbing moving mechanism, variable rail transition transfer trolley mechanism and multiple load moving platform car, iron type and model conveying rail line one from right to left respectively have iron type and model heating furnace device, iron type and model grabbing moving mechanism, iron type sand shooting sand-coated device and iron type and model mould drawing separation mechanism;Iron type and model conveying rail line two from left to right respectively have the moulding station of iron type and model and multiple load moving platform car;Two transition transfer trolley rails are respectively equipped with a variable rail transition transfer trolley mechanism;Iron type and model mould drawing separation mechanism, iron type sand shooting sand-coated device are all through type.The utility model structure is reasonable, sand-coated casting quality is good, degree of automation is high, easy to install, satisfy use demand.

The application provides a method for strengthening leaching of monazite optimal-soluble residue and relates to the technical field of hydrometallurgy. The method uses two-stage leaching to strengthen leaching: in a first-stage pre-leaching procedure, the optimal-soluble residue is pre-leached by using residual acid of leaching solution generated in a second-stage strengthening leaching, so as to increase the valuable metal content of the leaching solution and reduce the residual acid concentration, thereby reducing the dissolution rate of other impurity elements and improving the filtration performance of the ore slurry; the utilization rate of the residual acid is improved, and the overall acid consumption is reduced; the first-stage pre-leaching does not need heating, and the reaction heat is used to naturally heat the ore slurry, so that the energy consumption is effectively reduced; the reaction condition is relatively mild, and the requirement for the equipment and the operating environment is low; aging or standing is not needed, the operation is continuous, and the process is smooth; in the second-stage strengthening leaching procedure, the first-stage pre-leaching residue is strengthened and leached by using high acid, so that the valuable metal leaching rate is effectively improved; after part of the elements are recovered from the optimal-soluble residue by pre-leaching, the dissolved matter is relatively reduced under the condition of high acid, the ore slurry concentration and viscosity are reduced, and the solid-liquid separation effect is good.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of novel tiamulin fumarate. The preparation method comprises the following steps: reacting pleuromutilin with thionyl chloride to generate chlorinated pleuromutilin; reacting the chlorinated pleuromutilin with thiourea, and carrying out alkali treatment, so as to generate sulfhydrylated pleuromutilin; the preparation method comprises the following steps: reacting sulfhydrylated pleuromutilin with 2-bromo-N, N-diethyl ethyl-1-amine to form tiamulin, and finally carrying out a salt forming reaction. The invention provides a synthetic route of chlorination, sulfhydrylation, alkylation and salification, and two key intermediates, namely the chlorinated pleuromutilin and the sulfhydrylated pleuromutilin, are prepared step by step, so that the accurate control of the reaction process is realized. Wherein the chlorination reaction is catalyzed by N, N-dimethylaniline, the low-temperature staged reaction is adopted, and the selectivity is good; thiourea is used for alkaline hydrolysis in sulfhydrylation, so that foul mercaptan is avoided; alkylation is carried out under weak base and low temperature; no controlled reagent is needed in the whole process, and green chemical requirements are met.

The invention provides a double-section controllable dynamic solid-liquid circulation tea and wine fermentation tank which comprises a supporting frame and a control box, the control box is fixed to the lower portion of the left side of the supporting frame, connecting columns are transversely fixed to the left end and the right end of the upper portion of the supporting frame, a stepping motor is fixed to the upper portion of the right side of the supporting frame, and a main cylinder is fixed between the two connecting columns; an upper heating plate and a lower heating plate are fixed to the upper end and the lower end in the main cylinder respectively, a partition plate is fixed to the middle of the main cylinder, a filter plate is embedded into the middle of the partition plate, an electric push rod is fixed to the top of the main cylinder, a servo motor is installed at the bottom of the main cylinder, and an adjusting assembly is arranged in the main cylinder. In the fermentation process, segmented dynamic regulation and control fermentation of tea wine can be achieved, the solid-liquid separation circulation efficiency is low, the whole process is more coherent, tea leaves cannot be deposited at the bottommost end of the fermentation chamber for a long time in the fermentation process, solid-liquid contact is more sufficient, and the quality of the tea wine is effectively improved.

The invention relates to the technical field of metal surface treatment, in particular to a continuous selective nickel-tin electroplating method and system for a precise electronic element, and the method is used for realizing high-precision selective tin plating of a specific area and ensuring that a plating layer (especially a local plating area) has excellent binding force, uniformity and compactness; and through optimized process design and pollution control, the overall performance and the product yield of the plating layer are improved.

The invention relates to the technical field of electric arc cutting, and discloses an intelligent ship building cabin rib plate cutting device which comprises a machine shell, a traction mechanism, a main cutting mechanism and an auxiliary cutting mechanism are arranged on the machine shell, and the traction mechanism is used for feeding and conveying a steel plate to the main cutting mechanism and the auxiliary cutting mechanism; the main cutting mechanism is used for sequentially cutting a steel plate into strips and blocks, and the auxiliary cutting mechanism is used for removing one corner of a blocky steel plate before the strip-shaped steel plate is cut into the blocky steel plate. The traction mechanism, the main cutting mechanism and the auxiliary cutting mechanism are integrated, full-automatic continuous machining of cabin rib plates from flat plates to trapezoidal finished products is achieved, the overall layout is compact, actions are coherent, full-process automation of feeding, strip cutting, corner cutting, dicing and blanking is achieved through intelligent electrical and mechanical linkage control, and the production efficiency is improved. The manual intervention intensity and the skill dependence are obviously reduced, and the production safety and the standardization level are improved.

The invention relates to the technical field of guide wheel ceramic plating, in particular to bus bar traction guide wheel ceramic plating equipment which comprises a base, and a vacuum tank communicated with a vacuum pump set is fixedly connected to the surface of the base. According to the bus bar traction guide wheel ceramic plating equipment, an operator only needs to sleeve the guide wheels into the placing rods in sequence, and the dead weight of the guide wheels during falling can trigger a pneumatic chain reaction. The first guide wheel presses the lowermost limiting block to drive the pressed pneumatic piston rod, compressed gas of the first guide wheel pushes the upper-stage ejection pneumatic piston rod through the pipeline, and therefore the upper side edge limiting mechanism is pushed out of the inner groove and exactly abuts against the upper surface of the guide wheel to form limiting. And the guide wheels are automatically and repeatedly placed along with successive placement of the guide wheels, and finally all the guide wheels are automatically separated and axially positioned by the side edge limiting mechanisms which extend out in pairs. Rapid batch feeding of multiple workpieces is achieved, it is ensured that constant isolation space exists between the workpieces, and preconditions are created for subsequent uniform coating.

The invention discloses a method for green preparation of ammonium persulfate from sodium sulfate solid waste based on a membrane technology, and belongs to the technical field of sodium sulfate solid waste recycling, and the method comprises the following steps: S1, system assembly and electrolyte preparation: assembling a three-chamber electrolytic bath according to the sequence of an anode chamber, a cation exchange membrane, an intermediate chamber, a precise control membrane and a cathode chamber, preparing an anode chamber sulfuric acid electrolyte, an intermediate chamber sodium sulfate raw material solution and a cathode chamber ammonium bicarbonate initial solution; s2, starting the system and establishing a steady state: introducing ammonia gas into the cathode chamber and adjusting the flow of the ammonia gas to dynamically stabilize the pH value of the cathode chamber in a target interval of 9.0-9.5 so as to establish an NH4 < + > storage area in the cathode chamber; s3, continuous operation and dynamic material balance: after the system enters a steady state, extracting an anode chamber mixed solution, and extracting a part of cathode chamber mixed solution in a cathode chamber; supplementing materials in each chamber; s4, crystallizing and purifying ammonium persulfate; according to the invention, the technical problem of direct electro-synthesis of ammonium persulfate from sodium sulfate is solved through the innovation of a precise control membrane design and an ion migration strategy.

This application discloses a chemithermomechanical pulp, a core layer pulp, and cigarette white cardboard, and their preparation methods, belonging to the field of white cardboard technology. The chemithermomechanical pulp is obtained by treating chemithermomechanical pulp raw materials with hydrogen peroxide decomposing enzymes; the chemithermomechanical pulp includes chemithermomechanical softwood pulp and chemithermomechanical hardwood pulp; the amount of hydrogen peroxide decomposing enzyme added is 200-400g per ton of chemithermomechanical pulp, and the residual content of oxidizing substances is less than 25ppm. This invention, by adding hydrogen peroxide decomposing enzymes to the chemithermomechanical pulp, effectively decomposes residual oxidizing substances in the pulp, inhibiting the oxidation of lignin and other substances to methanol. The resulting core layer pulp and cigarette white cardboard have reduced methanol generation, achieving the goal of inhibiting methanol generation at its source.

The application belongs to the field of semiconductor MEMS device processing, and particularly relates to a structure-assisted electromagnetic MEMS micromirror processing method, which improves the problems of high processing complexity and high processing cost existing in the prior art. By using the schemes of selective silicon-silicon bonding after local roughening, thick silicon MEMS processing technology based on conventional silicon-silicon bonding, fusion of high-precision laser cutting in the MEMS processing flow, increase of temporary support and heat dissipation structure and the like, the dependence of the MEMS micromirror processing process on the temporary bonding and debonding equipment and technology required for wafer processing can be reduced, the machine time occupation of the single crystal silicon dry etching equipment is reduced, the processing cost is controlled, the mutual compatibility of each single-step process in the process flow is improved, the processing can be realized only by using the combination of conventional equipment and its process, the complexity of the processing process is reduced, the processing cost is reduced, and the electromagnetic MEMS micromirror has good manufacturability.

The invention provides an efficient demister, and belongs to the technical field of gas purification equipment. The demister comprises a direct-current high-voltage power supply, a cylinder body, a high-voltage electrode, an insulating sleeve and a liquid collecting screen plate, the positive electrode of a direct-current high-voltage power supply is connected with the high-voltage electrode, the negative electrode of the direct-current high-voltage power supply is connected with the barrel and the liquid collecting screen plate and is grounded, the barrel and the liquid collecting screen plate form a low-voltage electrode, and the distance between the high-voltage electrode and the low-voltage electrode is set to be 2-8 cm; in an operation state, a high-voltage electric field is formed around the high-voltage electrode, so that fog-containing gas realizes efficient fog drop trapping in the high-voltage electric field. The demister has the advantages of simple structure, high demisting efficiency, low energy consumption, safety and reliability in operation and the like, and is particularly suitable for demisting industrial waste gas and an air conditioning system.