756results about "Reversed direction vortex" patented technology

The invention belongs to the technical field of oil-gas-water separation equipment, and discloses an ultrasonic detonation rotational flow microbubble flotation device which comprises a vertical container tank with inner and outer stepped double-barrel design and a separation inner barrel, an oil gathering umbrella is arranged on the upper portion of the interior, an oil discharge connector is arranged on the outer wall of one side, and surrounding physical demulsification coalescence filler is arranged on the upper portion of the area between the tank and the inner barrel. And the lower part of the separation inner cylinder is provided with a reverse symmetrical double-tangential rotational flow inlet, the bottom of the separation inner cylinder is externally provided with a purified backflow water inlet and is communicated with the purified water diversion outlet in a process manner, and the bottom of the separation inner cylinder is internally provided with a gas-water mixer and an ultrasonic knocker. By combining ultrasonic cavitation, rotational flow centrifugation, micro-nano bubbles and physical coalescence demulsification technologies, the diameter of the bubbles is reduced by 15 microns or below through the ultrasonic detonation cavitation effect, fine oil drops and suspended particles which are difficult to treat through traditional flotation and are 10 microns or below can be captured, the method is suitable for multi-phase separation of discrete high-concentration fine pollutants, and the flotation efficiency is improved. Complex separation scenes such as oily sewage, micro-plastics and mineral flotation can be treated.

The invention discloses an oil reservoir exploitation multiphase flow separation device with cyclone pre-separation, which comprises a cyclone separator body, a cyclone separation assembly, a purification and deposition prevention assembly and a gas export and purification assembly, and is characterized in that the cyclone separation assembly is mounted in the cyclone separator body; according to the device, primary screening and flow equalizing are carried out on high-sand-content multi-phase fluid through a honeycomb damping grid at the front end of a micro rotational flow channel by utilizing a regular pore channel structure of the honeycomb damping grid, large-particle solid impurities are effectively intercepted, and the high-sand-content multi-phase fluid is purified; after the fluid passes through the honeycomb damping grid, the fluid enters the conical opening of the micro rotational flow channel, the flow speed is increased under the acceleration action of the contraction section, a high-strength rotational flow field is generated along a flow guide path formed by the micro spiral grooves, and the fluid is prevented from directly entering the micro rotational flow channel to cause local blockage or abrasion; and primary separation of oil, gas, water and solid impurities is realized under the action of centrifugal force.

The invention relates to the technical field of rotational flow desilting devices, and particularly discloses a rotational flow desilting device for hydraulic engineering, which comprises a rotational flow desilting cylinder, a rotational flow assembly, a sand-water separation assembly, a conveying assembly and a control management unit, a discharging pipe is fixedly connected to the bottom of the rotational flow desilting cylinder, a control valve is fixedly connected to the interior of the discharging pipe, an electric valve is fixedly connected to the interior of the water inlet pipe, and the control management unit is used for monitoring and analyzing the running state of the rotational flow desilting cylinder in real time. According to the invention, through the arrangement of the control management unit, the traditional extensive mode depending on artificial experience judgment can be changed, so that the equipment operation information can be obtained more comprehensively, timely and accurately. Based on the data, different working conditions can be accurately identified, a basis is provided for parameter optimization, and the problem that traditional fixed parameter control cannot adapt to sewage characteristic changes is solved.

An efficient multiphase-flow graded-separation, concentration, and purification system for argillaceous sandstone uranium ore includes a hydraulic tossing washing and scattering pretreatment device, a high-frequency linear vibration grading device, a first-stage multiphase-flow swirling grading device, an energy-gathering ultrasonic scrubbing device, a second-stage multiphase-flow swirling grading device, a high-frequency linear vibration dewatering device, an efficient uniform-mixing and activating system and a conditioning and pressing dewatering system. The present disclosure implements intensive mud-sand stripping of crushed argillaceous sandstone uranium ore, fine graded-separation of material, and efficient uniform-mixing and activating and deep efficient dewatering of fine-particle argillaceous material. Finally, four types of core material of coarse sand material, fine sand material, dry tailings residue and a high-concentration uranium ore leaching solution are formed through continuous work. Efficient multiphase-flow graded-separation, concentration and purification of the argillaceous sandstone uranium ore are implemented, and an intensive extraction rate of uranium ore resources is improved.

A dust collecting device is provided. The dust collecting device includes a particle separation component, an airflow output component and a particle collection component. One side of the particle separation component extends outward to form a first gas input portion, one end of the particle separation component extends outward to form a first gas output portion, and another end of the particle separation component extends outward to form a foreign matter outlet portion. One side of the airflow output component extends outward to form an airflow inlet portion, one end of the airflow output component extends outward to form a second gas output portion, and another end of the airflow output component extends outward to form a second gas input portion. The second gas output portion is connected to the first gas input portion. The particle collection component is connected to the foreign matter outlet portion.

The utility model belongs to the technical field of crushing, and particularly relates to a dragon cyclone crusher production line which comprises a dragon cyclone crusher body, a grader and a dust remover, the grader is provided with a feeding end, a first discharging end and a second discharging end, and a discharging pipe of the dragon cyclone crusher body is connected with the feeding end of the grader; a first discharging end of the grader is connected with a feeding pipe of the dust remover; according to the dragon cyclone crusher production line, crushing of the materials in the cavity is differentiated, over-crushing of the materials reaching a certain size fraction can be reduced, and finally the production line combining the dragon cyclone crusher, the grader and the dust remover produces the least over-crushed materials.

A one-stage water separator device comprises a water separator housing comprising a water separation chamber and a water collection chamber, a water-laden volume flow inlet port defining a water-laden volume flow inlet channel for channeling a water-laden volume flow into the water separation chamber, a water volume flow outlet port defining a water volume flow outlet channel for channeling a water volume flow out of the water collection chamber, a water-unladen volume flow outlet port defining a water-unladen volume flow outlet channel for channeling a water-unladen volume flow out of the water separation chamber, and an immersion tube comprising an immersion tube portion immersed in the water separation chamber and for fluidically connecting the water-unladen volume flow outlet port with the water separation chamber, an axial extension of the immersion tube portion essentially corresponding to an axial transition area between the water separation chamber and the water collection chamber.

A sand trap for oil and gas extraction includes a cyclonic flow section having a longitudinal axis, an inlet for receiving a high-pressure fluid stream with particulates, an upper portion, a choke area, and a funnel portion narrowing from the upper portion to the choke area. The inlet has an axis generally perpendicular but askew to the longitudinal axis. A vortex finder extends downwardly from a cap and defines a passageway coaxial with the longitudinal axis for fluid to exit. A spherical accumulator extends downwardly from the cyclonic flow section and has a center axis coaxial with the longitudinal axis. Upper and lower ends of the spherical accumulator each have an opening centered along the longitudinal axis, and the spherical accumulator is unobstructed from the upper opening to the lower opening for the particulates to pass unimpeded and accumulate in the accumulator.

A kind of multi-class small particle seed image acquisition system based on suction type material cleaning, including camera, tray and material cleaning device;The camera of the discharge port of tray is above the tray, the surface of tray is horizontal, lens vertically faces the surface of tray;Tray is connected to vibration device;The discharge port of tray is connected to material cleaning device.The material cleaning device is suction type material cleaning device;Material cleaning device includes suction head, material cleaning channel, cyclone separator and turbine fan;The periphery of the surface of the discharge port of tray has material blocking structure, and the discharge port is opened on the material blocking structure;The front end of suction head is connected to the discharge port;The rear end of suction head is connected to the air inlet of cyclone separator through material cleaning channel;The air outlet of cyclone separator is connected to the air inlet of turbine fan;The discharge port at the bottom of cyclone separator is connected to seed container;The cross section of material cleaning channel is circular, and the air inlet of cyclone separator is connected between material cleaning channel and cyclone separator through circular-to-rectangular adapter, and the two end faces of adapter are smoothly transitioned.

The invention relates to a cyclone separator capable of preventing particles on the outer wall of a riser from adhering and coking, and the cyclone separator capable of preventing particles on the outer wall of the riser from adhering and coking comprises an exhaust pipe, a rotational flow structure, and a cyclone pipe, a cylinder body, a cone and a discharging structure which are sequentially communicated from top to bottom, the exhaust pipe is arranged above the cyclone pipe and partially extends to the cyclone pipe, an air inlet and an air outlet are formed in the ends, located inside and outside the cyclone pipe, of the exhaust pipe respectively, and the rotational flow structure is located in the cyclone pipe and surrounds the exhaust pipe; the arrangement position of the feeding port is higher than that of the rotational flow structure, and the large end of the cone is connected to the barrel. According to the cyclone separator capable of resisting particle adhesion and coking on the outer wall of the riser, the problem of coking outside the riser can be solved, and the separation efficiency can be ensured.

The utility model provides a centrifugal volute feeding cyclone which comprises a body, a plurality of barrels are arranged at the top of the body, and flange plates are fixedly installed on the outer side faces of the barrels. The multiple supporting frames are arranged on the outer side faces of the multiple barrels correspondingly; and the multiple limiting assemblies are arranged on the outer side faces of the multiple supporting frames correspondingly. According to the centrifugal volute feeding cyclone provided by the utility model, the supporting frame, the threaded ring, the rotating ring, the pull rod, the clamping assembly and other structures are matched with one another, so that when the cylinder body is mounted, the cylinder body only needs to be inserted into the inner side surface of the supporting frame, then the bottom of the flange plate is propped against the top of the supporting frame, and the cylinder body is mounted; and then a threaded ring is rotated to drive a rotating ring, a pull rod and a clamping assembly to move downwards, so that the bottom of the clamping assembly is pressed on the top of a flange plate, the effect of limiting and mounting the barrel can be achieved, operation is convenient and rapid, and the mounting efficiency is improved.

The utility model discloses a high-precision multilayer hydraulic cyclone desanding device which comprises a concrete pool body and a water inlet, the water inlet is located in the concrete pool body, one end of the water inlet is fixedly connected with a water distribution port, the end, away from the water inlet, of the water distribution port is fixedly connected with stacked discs, and the stacked discs are connected through stacked disc fixing pieces. The side, away from the stacking disc, of the stacking disc fixing piece is connected with a mounting frame, the top end of the mounting frame is fixedly connected with a mounting support, and a flushing system is arranged on the mounting frame. The bottom of the mounting bracket is connected with the whole desanding device, four mounting support legs are arranged on the periphery of the mounting bracket, the mounting support legs are connected with the concrete pool wall, in order to adapt to construction errors of the concrete pool wall, the mounting bracket can realize an adjusting space of + / -8cm, and in order to adapt to the shape of the concrete pool wall, the mounting support legs and the mounting bracket can realize 180-degree angle adjustment.

The utility model discloses a low-resistance inlet structure of a cyclone of a cement preheater, and relates to the field of cement industrial production. The feeding device comprises an inlet air pipe, a volute body is installed on one side of the inlet air pipe, an inner cylinder integrated with the volute body is welded to the middle of the volute body, a column body is installed on the lower side of the volute body, a discharging cone is installed below the column body, a plurality of installation frames are installed on the peripheral side of the column body, and the installation frames are installed on the lower side of the volute body. A discharging pipe is installed at an outlet of the discharging cone, and a low-resistance inlet assembly is arranged at an inlet of the inlet air pipe. According to the utility model, the air conveying pipe and the expansion shell are arranged at the inlet air pipe, and the expansion shell is arranged at the top of the inlet air pipe and the top of the air conveying pipe, so that the width of the inlet air pipe is kept unchanged, the height of the air inlet is increased, and the area of the inlet of the cyclone cylinder is properly increased, and in this way, the resistance can be effectively reduced, and the influence on the separation efficiency of the cyclone separator is small.

A portable compressed air filter using a multi-tube cyclone according to one embodiment of the present invention comprises: a housing in which an air flow part is formed and into which compressed air is introduced and discharged; and an impurity separation unit provided in the air flow unit of the housing and separating impurities from compressed air, the impurity separation unit including, in an upper portion thereof: a first cyclone forming unit that centrifugally separates the impurities by causing the introduced compressed air to flow in a swirling flow manner, and a second cyclone forming unit that centrifugally separates the impurities in the swirling flow manner; and a second cyclone forming unit which is provided on the inside of the first cyclone forming unit and which centrifugally separates impurities by causing the compressed air that has passed through the first cyclone forming unit to flow again as a swirling flow.

A dirt separator for a vacuum cleaner includes a chamber having an inlet through which dirt-laden fluid enters the chamber and an outlet through which cleaned fluid exits the chamber. A coil at the outlet rotates about the axis of rotation and includes an aperture through which the cleaned fluid passes. The dirt-laden fluid enters the chamber along a flow axis intersecting the disc.

The invention discloses a modified carbon black particle recovery device, and relates to the technical field of carbon black production processes, the modified carbon black particle recovery device comprises a cyclone separator, the cyclone separator comprises a conical cylinder, the top of the conical cylinder is communicated with an airflow input pipe, the bottom of the conical cylinder is provided with a hopper, and the middle position of the top end of the conical cylinder is communicated with an air outlet pipe; the air outlet pipe is communicated with a bag-type dust collector, a gas drainage box is arranged on the inner side wall of the conical barrel, the airflow input pipe is communicated with the gas drainage box, the gas drainage box is spirally arranged in the circumferential direction of the conical barrel, an outlet is formed in the bottom end of the gas drainage box, and the air outlet pipe extends into the conical barrel. And the horizontal height of the outlet position of the gas drainage box is higher than the bottom end of the gas outlet pipe. The carbon black particles and the carbon black dust can be effectively separated, and the separation effect of the carbon black particles and the carbon black dust is improved.

The application discloses a switching centrifugal separation impurity system and a chromatography system thereof. The switching centrifugal separation impurity system comprises a buffer tank, a cyclone separator and a four-valve array group, the bottom of the buffer tank is connected with the middle outlet of the cyclone separator, wherein the cylindrical top of the cyclone separator, the top of the buffer tank and the conical bottom of the cyclone separator are respectively connected between different valves of the four-valve array group. The switching centrifugal separation impurity system and the chromatography system thereof can realize rapid separation without washing the screen, thereby improving the efficiency of the chromatography.

The present application relates to a separator for separating solid particles from a process gas stream conducted multiple times through a working machine, the separator having: a process gas inlet through which a particle-carrying process gas discharged by the working machine is fed to the separator; a filter-free separation element for reducing particle loading in the process gas; a process gas outlet that discharges a portion of the process gas having the reduced particle loading to the working machine; the separator also has a bypass flow filter that filters another portion of the process gas having the reduced particle loading to provide a filtered bypass flow and a bypass outlet downstream thereof that discharges the bypass flow of the filtered process gas; the separation element comprises a cyclone separator and a blocking element at the downstream of the cyclone separator; a tube having an end-side access opening is provided as a blocking element, which tube is positioned as an insert tube in the region of a cyclone eye of the cyclone flow; and the insert tube passes through the cyclone flow.

The utility model discloses a diversion device for solving coal overflow in a cyclone, which relates to the technical field of coal washing and dressing, and comprises a flow collecting box, the flow collecting box is arranged at the top end of a flow dividing box, the lower end of the flow collecting box is provided with an assembly port, and an overflow box port at the top end of the flow dividing box penetrates through the assembly port and extends into the flow collecting box. One side of the flow collecting box is connected with a flow guide box, and the other end of the flow guide box is arranged over the arc-shaped screen. According to the flow guide device for solving coal overflow in the cyclone, the flow collecting box and the flow guide box are arranged to guide density liquid and coal slime overflowing from an overflow box opening to a downstream arc-shaped screen, overflow materials can directly enter downstream equipment along the flow guide groove, and the situation that a large amount of water and medium run is effectively avoided; and meanwhile, water and media in the overflow objects are screened through the arc-shaped sieve and then are recycled for secondary use.

When the equipment for improving the efficiency of the cyclone separator through two-way air extraction is used, air extraction is conducted through the air extraction device, external air enters the outlet air extraction ejector through the main air extraction pipeline, and air in the barrel is extracted to the outlet air extraction pipe through the annular gap between the outlet inner pipe and the outlet outer pipe; the air enters an outlet air exhaust ejector through an outlet air exhaust branch pipeline, external air and air in the barrel body enter a discharge port air exhaust ejector through a first connecting pipeline, and air in the middle ash hopper enters the discharge port air exhaust ejector through a discharge port; external air, gas in the barrel and gas in the middle ash hopper enter the stock bin through a second connecting pipeline and an air extractor, purified gas obtained after dust is completely removed through a dust remover is diffused to a centralized diffusion system through a total flow meter, and dust in the stock bin is discharged through a stock bin discharging valve. The secondary vortex can be inhibited and weakened, the cyclone separation efficiency is improved, and the running resistance is reduced.

The present invention relates to the improvement applied to the discharge chamber of static machine elements used in the devices known as hydrocyclones, integrated into the stage of verification of the quality of the size of the ore after the stage of fragmentation, and its method of assembly, coupling and separation in relation to the body of the hydrocyclone, represented by the evolution solution in the industrial and commercial sector of the equipment for the classification / separation of particles of the ore that has undergone the program of concentration, desliming, solid recovery and closed grinding circuit, applied in particular in the equipment known as hydrocyclone (Eq), where, to solve the problem of premature wear and complex maintenance of the discharge chamber of static machine elements, the present invention is implemented with an improvement in the design of its structure, making it consist of three parts: lower part (10), male quick coupling part (20) and fixed base (30). A design of quick coupling / separation of the lower part (10) is presented, operable for the verification of the integrity of the cutting diameter (H), which differs in that it is sufficient to perform the quick separation / coupling of the assembly comprising the lower part (10) and the male quick assembly coupling part (20).

The invention relates to a method and device for designing a spatial streamline inlet of a rotational flow separator, and the method comprises the steps: determining an inlet angle alpha, a wrap angle beta, an incident angle gamma and an overturning angle theta of the inlet of the rotational flow separator according to the performance requirements of the rotational flow separator; the method comprises the following steps: selecting a control point at a rotational flow separator, generating a basic shape of a characteristic bus of the spatial streamline inlet through a spline curve equation, then selecting a type value point to carry out iterative optimization on the bus shape, and determining a final curve shape of the spatial streamline inlet through an entrance angle, a wrap angle, an incident angle and a flip angle; based on the inlet shape of the rotating flow separator, the section shape of a space streamline inlet is designed through a Bezier curve equation; and according to the final curve shape and the section shape of the spatial streamline inlet, the spatial streamline inlet structure of the rotating flow separator is determined. Compared with the prior art, pre-separation of particles / liquid drops is achieved through fluid inertia accelerated rotation, and the separation efficiency of the hydrocyclone is improved.

This invention discloses a process for preparing solid sodium silicate based on controllable particle size water quenching, belonging to the field of inorganic silicate chemical technology. The specific steps are as follows: S1: raw material melting and homogenization; S2: controllable particle size water quenching; S3: solid-liquid separation and online classification; S4: deep drying and packaging. This invention achieves innovation and simplification of the production process: through a one-step "atomization-cooling" forming method, the high-energy-consuming crushing and screening processes in traditional processes are completely eliminated, shortening the process flow and reducing equipment investment and maintenance costs; it significantly improves the overall quality of the product: directly generating solid particles with high sphericity and smooth surface, the product has good flowability, stable bulk density, high whiteness, and no tendency to agglomerate during subsequent dissolution, with a faster dissolution rate and superior application performance.

The utility model relates to the technical field of cyclone separators, in particular to a matrix type parallel cyclone separator group which comprises a flue gas inlet, the device further comprises a first pretreatment device, a second pretreatment device, a first cyclone separator, a second cyclone separator, a third cyclone separator, a fourth cyclone separator and a pressure stabilizing cavity. According to the utility model, the outlet of the pretreatment device is arranged close to the side of the central shaft, and pipelines with different lengths are adopted to realize matrix type compact arrangement of the cyclone separators, so that the matrix type parallel cyclone separators have advantages in occupied area; by adopting axial symmetry distribution, designing the outlet size of the pretreatment device and arranging an outlet valve of the pretreatment device, airflow is ensured to be uniformly distributed in the four cyclone separators, so that the stability of an internal flow field of the cyclone separators is improved, and the separation efficiency is prevented from being reduced; in addition, the reliability of the system is remarkably improved, the service life of equipment is effectively prolonged, and the maintenance and shutdown time is shortened.

The cyclone hydraulic separator comprises a first shell, a liquid inlet is formed in one end of the first shell, a second shell integrally formed with the first shell is arranged at the end, far away from the liquid inlet, of the first shell, a clear liquid outlet is formed in the side, far away from the first shell, of the second shell, a mounting seat is arranged in the first shell, and a liquid outlet is formed in the mounting seat. And the mounting seat is provided with a liquid penetrating opening and a centrifugal assembly. According to the cyclone hydraulic separator, suspension liquid is introduced into the first shell from the liquid inlet, solid particles or liquid with large density in the suspension liquid are thrown to the inner wall of the first shell and the inner wall of the second shell under the action of centrifugal force through the arranged centrifugal assembly, and the solid particles or the liquid with the large density in the suspension liquid are thrown to the inner wall of the first shell and the inner wall of the second shell along with liquid flowing and the action of the centrifugal force. And solid particles or liquid with large density in the suspension liquid enter the waste liquid box along the inner wall of the second shell, backflow of fine particles is reduced through the arranged enclosure, and the separation efficiency is improved.

To provide a cyclone type solid-liquid separating device capable of suppressing an environmental load, preventing increase of the number of components and increase of size of the device by a simple residue storing and discharging mechanism, and capable of smooth solid-liquid separation while reducing an operation range of the device and saving space, and efficiently recovering an object.SOLUTION: A cyclone type solid-liquid separating device includes: a main body unit 10 for supplying dirty liquid L1 containing a residue X to the inside of the device at predetermined pressure, and performing solid-liquid separation by a swirl flow, and a residue storing and discharging mechanism 20 concatenated from a lower end of the main body part 10 and discharging only the residue X and a part of the dirty liquid L1 deposited in a second storing unit bored in a residue storing body 200b.SELECTED DRAWING: Figure 1

A multi-stage circulating separation equipment is used to solve the problem of poor effect of conventional separation of a mixture. The multi-stage circulating separation equipment comprises a tank, a plurality of cyclones, a plurality of pressurizing pumps, and a pipeline module. The tank includes an upstream end and a downstream end. The tank includes an interior divided by a plurality of partitioning boards into a crude liquid chamber and a plurality of treatment liquid chambers. The crude liquid chamber and the plurality of treatment liquid chambers are arranged from the upstream end towards the downstream end. Each of the plurality of cyclones includes at least one discharge port and at least one return port. The discharge ports of the plurality of cyclones intercommunicate with the plurality of treatment liquid chambers, respectively. The pipeline module is connected to the tank, the plurality of cyclones, and the plurality of pressurizing pumps.

The utility model relates to the technical field of raw coal washing devices, in particular to a durable three-product cyclone, which is characterized in that a feed port of a cyclone main body is coaxially and fixedly connected with a counter flange and is correspondingly provided with a feed nipple, and the counter flange is coaxially and fixedly connected with the feed nipple. The outlet end of the feeding short connecting pipe is coaxially sleeved with a movable flange rotationally connected with the feeding short connecting pipe, the movable flange is connected with a butt flange through a bolt, the outer edge of the feeding short connecting pipe is fixedly connected with three limiting rods evenly distributed in the semi-circumferential direction of the feeding short connecting pipe, and the end of each limiting rod is fixedly connected with a limiting ring; the movable flange is fixedly connected with a sleeve, the sleeve is coaxially and movably sleeved with an insertion rod connected with the limiting ring in an inserted mode, a guide groove parallel to the axis of the sleeve is formed in the side wall of the sleeve, the outer edge of the insertion rod is fixedly connected with a guide rod connected with the guide groove in a sliding mode, and the outer end of the guide rod is fixedly connected with a threaded sleeve. And the movable flange is rotationally connected with a screw rod which is in threaded connection with the threaded sleeve.

The utility model relates to the technical field of particle separation, in particular to a cyclone fine particle separation device capable of adjusting granularity, which comprises a stirrer and a cyclone, the top of the cyclone is fixedly connected with an end table, the upper end face of the end table is provided with a through groove in a penetrating manner, the inner side of a rotary drum is rotatably connected with an overflow pipe, and the overflow pipe is provided with a through hole. And a spiral groove is formed in the outer wall of the rotary drum in a penetrating manner. When the rotary knob is rotated, the rotary drum is driven to rotate, the rotary drum rotates to drive the spiral groove in the outer wall of the rotary drum to rotate, and the limiting block fixed to the outer wall of the overflow pipe extends into the spiral groove, so that when the spiral groove rotates, the limiting block moves along the track of the spiral groove, the limiting block is limited through the clamping groove, and the limiting block can only move in the vertical direction; therefore, when the rotary drum is rotated, the overflow pipe is driven to move up and down, so that the insertion depth of the overflow pipe can be adjusted according to needs, medium particle size composition changes and the requirements for grading indexes are better met, and the grading particle size is adjusted on line.