26results about How to "Full response" patented technology

The utility model relates to the technical field of waste gas treatment, in particular to a tail gas absorption device in a desulfurization waste liquid salt extraction process, which comprises a collecting tower, a spraying system and a filler layer, the filler layer is arranged below a spraying pipe and comprises a filler supporting grating and a Pall ring, and the Pall ring is arranged in the collecting tower. The packing supporting grid is horizontally and fixedly installed inside the collecting tower, the Pall ring is flatly laid above the packing supporting grid and comprises an outer ring and an inner ring, the outer ring is flexibly arranged, the inner ring is rigidly arranged and is inserted into the outer ring, the inner ring and the outer ring are arranged in an interference fit mode, and the outer ring is fixedly connected with the Pall ring. By improving the structure of the Pall ring, the rigidity of the Pall ring is improved, an original PP Pall ring is replaced, and the Pall ring is applied to a spraying device for tail gas absorption, so that the problem that the mass transfer efficiency is reduced due to deformation of the Pall ring is solved, liquid in a tail gas absorption device is fully mixed with acidic or alkaline gas in tail gas, and the absorption efficiency is enhanced.

The utility model discloses a flue gas inlet guide plate assembly which comprises a guide plate body, the bottom of the guide plate body is fixedly connected with a flow collecting channel, the outer side of the circumference of the flow collecting channel is fixedly provided with an installation blocking piece, and a plurality of sets of installation holes are evenly formed in the installation blocking piece. The mounting separation blade is screwed on the circumferential side wall of the bottom of the desulfurization tower through a plurality of groups of mounting holes in the mounting separation blade; a dust scraping mechanism is installed on the upper side in the guide plate body, a driving fan is arranged on the dust scraping mechanism, a rotating shaft is fixedly arranged at the top of the driving fan, and a scraping plate is arranged on the circumferential outer wall of the end, away from the driving fan, of the rotating shaft and covers the circumferential outer wall of the guide plate body. According to the flue gas inlet flow guide plate assembly, impurities and scales covering the surface of the flow guide plate body can be scraped off through the scraping plate, the flow guide holes are prevented from being blocked by the impurities and the scales, and it is guaranteed that the flow guide plate body normally conducts flow guide operation for a long time.

The invention relates to the technical field of tin alloy solder, and discloses a preformed soldering lug with high welding strength, which comprises a soldering flux layer and a soldering lug main body, the soldering flux layer comprises esterified rosin, methyl ester, succinic acid, glutaric acid, cyclohexylamine hydrochloride and isopropanol; the soldering lug main body comprises tin, antimony, silver, bismuth, copper and nickel; by adding silver, bismuth, copper, nickel and metal elements in the alloy into the soldering lug, the mechanical strength of the solder alloy can be improved, compared with common tin-copper alloy, the mechanical strength of the soldering lug is greatly improved, the soldering flux is high in activity but low in corrosivity, stable high-mechanical-strength intermediate layer alloy is formed, and the soldering flux can be applied to the field of soldering. The welding strength and the tensile strength are more excellent, the soldering flux layer and the soldering lug main body have the synergistic effect, so that a welded part has high tensile property after being welded, and the mechanical strength of the solder alloy can be improved by adding silver, bismuth, copper and nickel in the alloy into the soldering lug and metal elements.

The utility model relates to the technical field of equipment special for preparing and processing livestock feed, in particular to a feed mycotoxin removing device which comprises a multi-stage mixing assembly. The multi-stage mixing assembly comprises a mixing protection shell as well as a first-stage mixer, a first-stage transition layer, a second-stage mixer, a second-stage transition layer, a third-stage mixer, a third-stage transition layer and a fourth-stage mixer which are sequentially connected in the mixing protection shell from top to bottom, and the mixing protection shell is communicated with a liquid conveying pipe; the first-stage transition layer, the second-stage transition layer and the third-stage transition layer are all connected with the liquid conveying pipe, and a feeding opening is formed in the top of the mixing protection shell. Through the mixing protection shell, the first-stage mixer, the second-stage mixer, the third-stage mixer, the fourth-stage mixer, the liquid conveying pipe and the feeding opening, multi-stage and multi-batch operation is achieved, and the problem that in the prior art, due to the fact that the activity amount of part of feed is small, the mycotoxin removal effect is poor is solved.

The invention provides a coal-fired boiler ammonia-doped combustion compatible matching system based on radiation characteristic compensation, which relates to the technical field of boiler combustion and comprises an ammonia-doped combustion operation characteristic database construction module, a real-time operation optimization module and a performance evaluation and self-optimization module. According to the method, the ammonia-doped combustion operation characteristic database is constructed, then whether the boiler performance parameters are recorded or not is judged based on the key boiler parameters, and ammonia-doped strategy dynamic adjustment and wall temperature safety regulation and control are carried out based on the ammonia-doped combustion operation characteristic database and the boiler performance parameters. Finally, when the fuel enters the coal-fired boiler, the mixing condition of ammonia and coal is evaluated, whether the fuel mixing strategy is optimized or not is judged, meanwhile, the oxygen content condition of the coal-fired boiler is monitored and adjusted, the position of high-temperature flames in the boiler is adjusted and controlled through flexible grading of the ammonia / coal fuel, matching of heat transfer distribution in the boiler and the coal-fired working condition is achieved, and the coal-fired boiler is obtained. The ammonia-doped combustion compatibility matching effectiveness of the coal-fired boiler is improved, and the problem that the ammonia-doped combustion compatibility matching effectiveness of the coal-fired boiler is low is solved.

The invention discloses a cleaning method for a semiconductor photoetching mask substrate, and belongs to the technical field of semiconductor manufacturing. According to the method, dynamic cleaning logic of step cooperation and energy matching is adopted, and the steps of interface wetting and pre-cleaning, chemical soft interface construction, low-damage mechanical stripping and synchronous washing, targeted reaction clearing, microstructure deep cleaning, interface dehydration and modification and final energy-assisted drying are sequentially executed. The method is characterized in that through the dependency relationship of chemical interface softening and low-damage mechanical stripping in sequence, the rotation speed of a substrate in each step is strictly controlled to meet the specific dynamic relationship (V2 < V1 < V4 < V3 < V5 < V6), and precise cooperation of chemical action, physical stripping and energy field cleaning is achieved. The contradiction between efficiency and substrate damage in a traditional cleaning process is effectively solved, full-scale pollutants from micron-scale particles to nano-scale molecular contamination can be removed without dead corners, and a clean, stable and secondary pollution resistant surface state is actively reconstructed at a cleaning end point; and the cleanliness and the service life of the mask substrate and the yield of a downstream photoetching process are remarkably improved.

The invention discloses a livestock breeding disinfection and sterilization integrated device and method, and belongs to the technical field of livestock breeding disinfection and sterilizer.The device comprises a movable base, a wind-light sterilization base is arranged on the movable base, and an electro-catalysis generation mechanism used for generating disinfectant is arranged on the wind-light sterilization base; the electro-catalysis generating mechanism is connected with a 360-degree global atomization disinfecting and killing mechanism used for disinfecting the livestock breeding environment through a high-pressure atomization conveying mechanism, the wind-light sterilization base is connected with an atomized liquid circulating and collecting hopper through a protective lifting cover, and the 360-degree global atomization disinfecting and killing mechanism comprises a lifting rotating frame located in the center of the atomized liquid circulating and collecting hopper; a lifting rotating central column is arranged in the center of the lifting rotating frame and is connected with the wind-light sterilizing seat through a wind-light sterilizing structure. The problems that an existing device cannot achieve 360-degree global disinfection, manual disinfectant preparation is troublesome, synchronous lifting and rotating cannot be achieved, disinfectant cannot be recycled, and air collaborative purification is lacked can be solved.

The utility model discloses a device for preparing m-aminotrifluorotoluene, which comprises a second mixing tank, the upper end of the second mixing tank is connected with a connecting pipe, one side of the second mixing tank is fixedly provided with a support frame, the support frame is provided with a first mixing tank, the upper end of the connecting pipe is connected with one side of the lower end of the first mixing tank, and the lower end of the connecting pipe is connected with the other side of the second mixing tank. One side of the upper end of the first mixing tank is connected with an adding box, and one sides of the lower ends of the adding box and the second mixing tank are connected with a first circulating mechanism. According to the utility model, the circular flow of raw materials is realized, and the spraying function of the spraying mechanism is combined, so that the stirring dead angle of the traditional stirring device is broken, the liquid raw materials can be fully mixed in the first mixing tank and the second mixing tank, the mixing uniformity is greatly improved, and the obtained liquid raw materials can be more fully contacted and reacted; the reaction time and energy consumption are reduced, and the overall efficiency of the reaction is improved, so that the product yield in unit time is increased.

The application relates to the technical field of mixing containers, and discloses a reaction kettle for fuel cell multi-element alloy catalysts, which comprises a kettle body, a feeding pipe and a discharging pipe are arranged on the kettle body, a stirring assembly, an air inlet assembly and a pneumatic auxiliary assembly are further arranged in the kettle body, the stirring assembly comprises a stirring shaft, spiral stirring blades fixedly installed on the stirring shaft and a crushing net for crushing fluid clusters, the spiral stirring blades are driven to rotate by the stirring shaft, the mixing of different solutions is accelerated, the crushing net can crush large fluid clusters or eddies, the stirring is more uniform and efficient, the cooperation of the air inlet assembly and the air inlet pipe facilitates the adjustment of the pressure in the kettle body, the air inlet assembly can also play an auxiliary stirring role, the airflow in the air inlet pipe can drive the spiral impeller to rotate and move downwards, the mixing of the powder additive and the solution is promoted, and the powder additive is prevented from floating on the liquid surface.

The utility model discloses a steel ladle bottom blowing system based on laval pipe structure belongs to metallurgical steelmaking technical field, specifically is between the gas supply pipe of steel ladle and gas source device adds laval pipe gas supply mechanism connection. Laval pipe gas supply mechanism includes gas delivery pipeline, laval pipe and gas source connecting pipe. Among them, gas delivery pipeline gas outlet end and the air inlet end coaxial communication of gas supply pipe. Coaxial on the end face of gas delivery pipeline air inlet end has round hole, and coaxially inserts gas source connecting pipe. The air inlet end of gas source connecting pipe is connected with gas source. Laval pipe air inlet end coaxial connection gas source connecting pipe gas outlet end. Further, the gas in the gas source can form a stable gas flow field at the air outlet end of the gas supply pipe through the laval pipe. The utility model fundamentally innovates the key link of steel ladle bottom blowing in steel smelting process, and provides the leading solution for realizing efficient and high-quality steel production.

The utility model relates to the technical field of material detection. A hot air circulating oven comprises an oven body, a hot drying table is arranged in the middle of the oven body, a hot drying cavity is formed in the portion, above the hot drying table, of the hot oven body, a plurality of hot drying bases capable of heating are arranged on the surface of the hot drying table, flasks are placed in the hot drying bases respectively, and a hot drying device is arranged in the oven body. The utility model provides a hot air circulating oven which is convenient to operate and control, can ensure that the overall temperature is stable and consistent during the reaction of a flask, is not easily influenced by room temperature, can ensure the reaction effect and sufficient reaction, and can ensure the accurate test result. The technical problems that in the prior art, the temperature is inconvenient to control in the reaction process of an existing flask, the reaction of reactants is not sufficient due to the influence of external temperature, the test result is influenced, and higher actual requirements cannot be met are solved.

This utility model provides a bipolar plate flow channel device for an electrolytic cell, relating to the field of bipolar plates for electrolytic cells. The device includes a bipolar plate body and a flow channel assembly. The bipolar plate body comprises a plate and a flow channel body. The flow channel body is formed on the plate. The flow channel assembly is arranged within the flow channel body. The flow channel assembly includes a flow-enhancing groove and a flow-enhancing block. Multiple flow-enhancing grooves are evenly distributed on one side of the inner wall of the flow channel body. Multiple flow-enhancing blocks are evenly distributed on the other side of the inner wall of the flow channel body. The flow-enhancing groove has a V-shaped structure. The flow-enhancing block has an isosceles triangular structure, and the tip direction of the flow-enhancing block is the same as the tip direction of the flow-enhancing groove. This bipolar plate flow channel device has a simple and reasonable structure and ingenious design. By setting the flow-enhancing groove and flow-enhancing block in cooperation, it can not only optimize the flow path of the electrolyte and gas but also improve the mass transfer efficiency, thereby improving the effectiveness of this utility model.

This utility model relates to melamine-formaldehyde resin production technology, and discloses a melamine-formaldehyde resin condensation reactor with flexible chain controllable polymerization, including a reactor body, a stirring device, a temperature control device, a feeding device, a flexible chain polymerization control device, and a discharging device; the stirring device includes a motor, a drive shaft, and a stirring paddle, with the motor installed above the reactor body and connected to the stirring paddle via the drive shaft; the temperature control device includes a heating jacket, a heating coil, and a temperature sensor located inside the reactor body; the feeding device includes a feeding pipe, a high-precision flow meter, an electric valve, and a feed inlet; the flexible chain polymerization control device includes a viscometer, an infrared spectrometer, a data processor, and a controller, with the viscometer and infrared spectrometer located inside the reactor body; the discharging device is located at the bottom of the reactor body and includes a sealing valve, a discharging pipe, a heat insulation layer, and a variable frequency delivery pump, with a heat insulation layer outside the discharging pipe and the variable frequency delivery pump installed on the discharging pipe.

This invention discloses a samarium-based rare-earth permanent magnet bulk material, its preparation method, and its application. (The last part, "ThMn," appears to be an incomplete sentence or fragment and is left untranslated.) 12 A uniform metallic T coating is formed on the surface of the magnetic powder. The composite magnetic powder is then oriented, pressed into blocks, and heat-treated to create a double-layered non-magnetic shell around the grains. This shell hinders domain movement, effectively improving the material's coercivity. Furthermore, compared to doping or melting, the coating process requires less T and allows for more precise control, preventing excessive T from entering the crystal lattice and negatively impacting the material's intrinsic magnetic properties, thus significantly improving the coercivity of ThMn. 12 Density and overall performance of rare earth permanent magnets.

This utility model provides a wet desulfurization system for aluminum electrolysis flue gas, relating to the technical field of wet system technology. It includes a slurry tank and a support frame. The support frame is positioned above the slurry tank, and a drive assembly is located at the middle of the support frame. The slurry tank contains stirring blades, and the drive assembly drives the stirring blades to rise, fall, and rotate. A limestone powder hopper is located on one side of the support frame. This utility model arranges a disc-shaped jet assembly and stirring blades in the slurry tank. Before the slurry enters the desulfurization tower, it undergoes pre-treatment for oxidation and crystallization. The disc-shaped jet assembly introduces oxygen in advance, creating an oxidizing atmosphere in the slurry. When the slurry subsequently enters the desulfurization tower and reacts with SO2 to generate CaSO3, it can be oxidized to CaSO4 more quickly because O2 is already sufficient, eliminating the need to wait for oxidation within the tower. The solubility of CaSO4 is much lower than that of CaSO3, making it easier to crystallize and precipitate. Crystallization promotes the forward reaction, reducing unreacted CaCO3 residue in the slurry.

This invention discloses a flocculation structure and flocculation equipment, relating to the field of wastewater purification technology. The flocculation structure includes a main body and multiple flow guiding structures. The main body includes multiple mounting plates that enclose a flocculation chamber. Each flow guiding structure is located on a mounting plate, and the multiple flow guiding structures are situated within the flocculation chamber. Each flow guiding structure includes a main flow plate and auxiliary flow plates. The main flow plate forms multiple flow guiding channels, and the auxiliary flow plates are evenly distributed within these channels. This invention aims to segment the water flow and increase the swirling eddies in the wastewater through this flocculation structure, thereby ensuring thorough mixing and reaction between the wastewater and the flocculation agent, thus enhancing the flocculation effect.

This utility model relates to the field of sludge treatment technology, specifically a sludge treatment screening and filtration mechanism, including a screening and filtration box. An installation plate is mounted below the stirring assembly, and an aeration assembly is located below the installation plate. The aeration assembly includes an aerator, an air supply pipe, a fixed plate, and multiple aeration heads. The output end of the aerator is connected to one end of the air supply pipe, and one end of each aeration head is fixedly mounted on the side wall of the air supply pipe. A filter assembly is installed below the aeration assembly. This utility model mainly reduces the total volume of sludge by mixing a separating agent with the sludge, through water removal and particle aggregation. The aeration process not only accelerates the biodegradation process in the sludge but also suspends the solid particles in the sludge, allowing for more thorough contact and reaction with the agent, thereby enhancing the effect of reducing sludge volume.

The utility model is suitable for the technical field of feed enzymolysis and fermentation, and provides a feed enzymolysis and fermentation device which comprises a fermentation tank, the heat preservation cylinder is fixedly arranged on the fermentation tank in a sleeving manner; the bottom plate is positioned at the bottom of the fermentation tank; the vertical plate is fixedly mounted on the bottom plate; the transverse shaft is rotationally mounted on the vertical plate and is fixedly connected with the heat preservation cylinder; the first servo motor is fixedly mounted on one side of the vertical plate and connected with the transverse shaft; the tank cover is positioned at the top of the fermentation tank; the opening and closing mechanism is mounted on one side of the vertical plate and used for controlling opening and closing of the tank cover; and the stirring mechanism is arranged on the fermentation tank and is used for mixing and stirring the feed, the water, the enzyme preparation and the strain in the fermentation tank. The feed enzymolysis and fermentation device provided by the scheme not only can carry out enzymolysis and fermentation on feed, but also has a function of pouring the feed, is relatively convenient to take the feed, and has a function of controlling fermentation temperature.

The application relates to the technical field of tea processing, and particularly discloses a method for symbiotic tea making of natural solid material and tea leaves and a product. The method comprises the following steps: S1, adopting tea leaf raw materials capable of fermentation, post-fermentation or aging; S2, adopting one or more whole pieces of natural solid material, which is not subjected to dyeing, glue injection, pickling or chemical optimization treatment; S3, performing cleaning, sterilization and air-drying pretreatment on the natural solid material; S4, placing the pretreated whole piece of natural solid material in the same coexistence space as the tea leaves for joint storage; S5, performing fermentation, post-fermentation or aging on the tea leaves in a suitable environment; and S6, aging and drying. The symbiotic tea making product can be used in the fields of high-end tea market, collection and special tea drinking, has the advantages that the tea leaves are more evenly fermented and aged, the tea soup quality is softer and more mellow, and the high-end recognition and collection value of the product can be significantly improved through the synergistic transformation of the natural solid material.

This invention discloses a crystalline polyimide / polyimide composite material, its preparation method, and its applications. The method involves first uniformly mixing phenylhexacarboxylic acid trihydride with a diamine monomer, followed by a solid-phase reaction under argon atmosphere protection. After the reaction, the product is immersed in a polar solvent to obtain crystalline polyimide. Then, the crystalline polyimide is added to an organic solution of polyamic acid, subjected to ultrasonic treatment in an ice-water bath, and subsequently thermosetting to obtain the crystalline polyimide / polyimide composite material. The crystalline polyimide in this composite material has a layered two-dimensional COF structure, giving it relatively high thermal conductivity, heat resistance, and high-temperature mechanical properties. Introducing the crystalline polyimide into the polyamic acid solution utilizes the special interfacial compatibility between the amino groups in the crystalline polyimide and the anhydrides in the polyamic acid to react, solving the problem of difficult processing and effectively expanding its application range.

This utility model discloses a flocculant filtration device for pharmaceutical wastewater recovery. The key technical features include a secondary filtration tank; the secondary filtration tank is funnel-shaped and has a cavity; limiting components are installed on both inner walls of the secondary filtration tank, and a secondary filtration mechanism is assembled between the two sets of limiting components; supports are installed at the four corners of the secondary filtration tank, and a primary filtration tank is assembled on the upper surface of the four supports. By adding a secondary filtration stage to the primary filtration tank, the overall wastewater treatment efficiency of this application is improved. Primary clarification mainly relies on flocculants and gravity sedimentation, while secondary filtration further removes fine particles through physical interception, reducing pollutant residue. This progressive treatment method not only improves the removal rate but also more effectively manages and controls the destination of different pollutants, enhancing the overall stability and reliability of the filtration process.

This invention discloses a method for preparing glycine amide hydrochloride, comprising adding water and a catalyst to a reaction vessel, introducing ammonia gas at 0-5°C, then adding chloroacetic acid dropwise, stirring the reaction, raising the temperature to 30-35°C after the addition is complete, introducing ammonia gas again, and continuing the reaction for 2-3 hours until the reaction is complete, removing ammonia and water, adding methanol solvent to crystallize and obtain glycine amide hydrochloride product, and then scraping off and collecting the crystals. This invention uses chloroacetic acid to generate glycine amide hydrochloride under the action of ammonia and a catalyst, and then crystallizing the product with alcohols. This avoids the use of hydrogen chloride gas or large amounts of alcohols as solvents, reducing the safety risks caused by the concentrated use of large amounts of alcohols, shortening the reaction time, improving product quality and yield, and simplifying subsequent processing. The removed ammonia is absorbed by the removed water, and then the ammonia gas is circulated for reuse, without generating wastewater, making it environmentally friendly. This invention is applicable to the preparation of glycine amide hydrochloride.

This invention relates to the field of artificial intelligence technology and discloses an AI-driven multimodal data analysis method and system. The system includes a data acquisition module for setting up acquisition nodes and terminals, acquiring multimodal data and device operating parameters in real time, and converting the formats; a multimodal fusion module for constructing a cross-modal semantic association model, processing spatiotemporal characteristics, fusing representational features, and associating simulations; a feature extraction module for constructing image, text, and speech-related extraction algorithms to obtain corresponding features; a comprehensive analysis module for standardizing features, performing association calculations, and comparing them with preset thresholds to analyze semantic consistency; and a hierarchical processing module for combining contextual calculations and analysis when semantic inconsistencies occur, performing secondary comparisons to analyze the target scene performance. This system and method can effectively process multimodal data, improve the accuracy and efficiency of semantic analysis, and are applicable to various scenarios.

The utility model discloses a catalyst preparation and detection device, and belongs to the technical field of catalyst activity detection. The catalyst preparation detection device comprises a workbench, a reaction kettle is arranged on the workbench, one side of the reaction kettle is connected with a detection system, the detection system comprises a shell, a reaction cavity is formed in the shell, a temperature adjusting cavity is formed between the inner wall and the outer wall, a temperature adjusting assembly is arranged in the temperature adjusting cavity, and a stirring assembly is arranged in the reaction cavity; the stirring assembly comprises a mounting shaft and two groups of stirring strips which are oppositely arranged, the two groups of stirring strips are respectively distributed along the axis direction of the mounting shaft, the lengths of the plurality of stirring strips positioned on the same side are different, and the inclination angles of the two stirring strips which are oppositely arranged are different. The temperature in the shell is adjusted according to the requirement during catalyst detection, and the stirring assembly is arranged in the reaction cavity, so that reaction materials can be fully mixed with the catalyst, and the detection result is more reliable.

The invention relates to the technical field of water treatment environmental protection equipment, and discloses a micro-nano bubble strengthening based efficient flotation water treatment device which comprises a material box, a bubble generation assembly, a central stirring assembly and a bubble scraping assembly. The control system comprises a data perception module, a fluid analysis module, a phase decision-making module and an execution cooperation module, and the system collects the instantaneous active power of a main motor in real time to calculate the load drop rate and quantify the bubble saturation of an impeller cavity. Meanwhile, differentiating the dissolved oxygen data to obtain the average oxygen consumption rate. When the load drop rate reaches a threshold value, the system controls the frequency converter and the circulating pump to be switched from a high-pressure suction phase to a low-shear diffusion phase, and bubbles are prevented from being damaged by strong shear; and the dosage of the compensation medicament is fed forward according to the oxygen consumption rate. Through self-adaptive monitoring of load characteristics and double-phase time-sharing decoupling control, the problems that micro-nano bubbles are prone to coalescence and fracture and dosing lags behind are solved, and the air flotation efficiency and the load fluctuation resistance are improved under the condition that an intrusive sensor is not additionally arranged.

The invention relates to the technical field of fusion firing processes, in particular to a multi-color purple sand pottery printing layering-free fusion firing process based on a special mineral material, which comprises the following steps: a raw material pretreatment step: crushing colorful purple sand raw ore, removing impurities, and screening to 200 meshes to obtain colorful purple sand raw ore pug; the special mineral material is finely ground and screened to 500 meshes, and the superfine special mineral material is obtained; and a precise mixing step. According to the invention, special mineral materials and colorful purple sand raw ore pug are scientifically proportioned, so that the shrinkage ratio difference of purple sand pug with different colors in the firing process is adjusted, the internal stress concentration of a green body is reduced, the phenomena of layering and cracking in the firing process are reduced, and the yield is increased; through the control steps of stepped drying, segmented heating firing, gradient cooling and the like, uniform removal of moisture in the green body and effective release of stress are ensured, and the texture stability and color uniformity of the multicolor purple sand ceramic seal are improved.