600 results about "Roller mill" patented technology

The present application belongs to the technical field of roller mills. Disclosed is a dual-transmission-type high-pressure roller mill for the mining industry, the roller mill comprising a housing supporting assembly, wherein circular feeding assemblies are mounted on two sides of the inner wall of the housing supporting assembly, respectively; a buffering and crushing assembly is mounted on the inner wall of the housing supporting assembly; a roller milling assembly is mounted on the inner wall of the housing supporting assembly, and the roller milling assembly is located below the buffering and crushing assembly; the housing supporting assembly is configured to support the circular feeding assembly, the buffering and crushing assembly and the roller milling assembly; the buffering and crushing assembly can buffer and crush ores; the circular feeding assembly can feed screened ores in a circular manner; and the roller rolling assembly is configured to mill the screened ores. Falling ores fall between two impact plates, and the two impact plates are pushed to move at the same time by means of two hydraulic rods, and can impact on the ores by means of impact needles on the two impact plates, such that the ores are crushed into small blocks, and thus the ore milling efficiency can be improved.

The invention discloses a ring roller mill device and a grinding method thereof, and particularly relates to the field of ring roller mills.The ring roller mill device comprises a machine shell, a driving part is arranged at the bottom of the machine shell, a main shaft is rotationally arranged in the machine shell, the driving part is used for driving the main shaft to rotate, a feeding pipe and a discharging pipe are arranged on the machine shell, and the feeding end of the discharging pipe extends into the machine shell; a roller grinding mechanism is arranged in the machine shell and used for rolling and grinding graphite particles. According to the graphite particle grinding device, the distance between the grinding areas is set to be decreased gradually along with height decrease in the vertical direction, so that when graphite particles are ground, overlarge grinding resistance can be avoided, when the graphite particles fall down layer by layer, resistance borne by the graphite particles in the grinding process is reduced, and the grinding quality of the graphite particles is improved. Therefore, the overall flowability of the graphite particles passing through the grinding area is improved, and the grinding efficiency of the equipment is improved.

The invention relates to a stable ring roller pulverizer which comprises a machine shell, an air guide barrel and a mounting barrel are fixedly arranged in the machine shell in a sleeved mode, and a grinding ring is fixedly connected to the inner side of the mounting barrel; a plurality of material grinding grooves are formed in the inner side of the grinding ring in an inward concave mode, the material grinding mechanism comprises a rotating disc driven by a corresponding driving mechanism, and a plurality of grinding rollers matched with the material grinding grooves of the grinding ring are rotationally installed on the periphery of the rotating disc; the buffering type material distributing mechanism comprises a feeding channel, a discharging port of the feeding channel is right opposite to the center of the rotating disc, a mounting part is mounted below the discharging port of the feeding channel in a lifting manner, a material distributing disc is rotationally mounted on the bottom side of the mounting part, and buffering rubber matched with the output shaft end of the driving mechanism is fixedly connected to the material distributing disc downwards; and the grader comprises a cylindrical filtering grating which is rotationally arranged at the feeding end of the discharging pipe. According to the device, dispersed feeding can be achieved, and the supporting performance of the material grinding mechanism can be enhanced in time when the device vibrates seriously.

Composite cement comprising Portland cement, a calcium carbonate and a mechanochemically activated clay obtained by grinding a clay raw material which was mined from one or more natural clay deposits in a ball mill or roller mill at a temperature below 150 °C until the absorbance units of the OH peak at 3600 to 3700 cm-1 and the SiO2 peak at 900 to 1000 cm-1 in an FTIR spectrum decrease by at least 20 %, as well as method for manufacturing the composite cement by blending Portland cement, calcium carbonate and the mechanochemically activated clay.

The invention discloses a preparation technology of isostatic pressing graphite. The preparation technology comprises the following steps of S1, raw material and ingredient pretreatment, S2, grinding, S3, mixing and kneading, S4, forming, S5, roasting, S6, dipping, S7, graphitization, S8, processing and detection and S9, finished product packaging. A graphite grinding machine used for primary grinding in the step S2 is a vertical roller mill; and a graphite mill used for secondary milling is an airflow mill. The kneading machine in the step S3 is a heating type kneading machine. And in the step S4, the vacuumizing time is 0.5 h, and the vacuum degree is 0 to-0.06 MPa. The roasting furnace in the step S5 is a rotary graphite roasting furnace.

The invention discloses a pre-concentration and tailing discarding process for vanadium titano-magnetite, and relates to the technical field of vanadium titano-magnetite beneficiation, and the pre-concentration and tailing discarding process comprises the following steps: raw ore is subjected to crushing operation to obtain a crushed product, and the crushed product is fed into high-pressure roller grinding operation to obtain a high-pressure roller grinding product; the high-pressure roller-milled product is subjected to screening operation, and an oversize product with the large particle size and an undersize product with the small particle size are obtained; the undersize products are subjected to first weak magnetic pre-concentration operation, tailings obtained through the first weak magnetic pre-concentration operation are subjected to first strong magnetic pre-concentration operation, concentrate obtained through the first weak magnetic pre-concentration operation and concentrate obtained through the first strong magnetic pre-concentration operation are combined into final pre-concentration concentrate, and the tailings obtained through the first strong magnetic pre-concentration operation serve as one part of final tailings; the oversize products are subjected to second weak magnetic pre-concentration operation, tailings obtained through the second weak magnetic pre-concentration operation are subjected to second strong magnetic pre-concentration operation, and concentrate obtained through the second weak magnetic pre-concentration operation and concentrate obtained through the second strong magnetic pre-concentration operation are combined and then returned to the high-pressure roller grinding operation; tailings obtained by the second strong magnetic pre-separation operation are used as one part of final tailings. According to the method, crushing, high-pressure roller grinding and screening are adopted, oversize and undersize products obtained through screening are subjected to magnetic separation, pre-concentration and tailing discarding, oversize product pre-concentration concentrate is returned to the high-pressure roller grinding, the subsequent ore grinding and selecting cost is effectively reduced, the iron and titanium grades of subsequent ore entering the grinding process are improved, the load capacity of the high-pressure roller grinding machine can be reduced, and energy consumption and production cost are reduced.

The invention discloses a production method of microalloy rare earth Ce high-strength steel. The production method comprises the following steps: 1) a smelting process; (2) refining; 3) continuous casting and casting blank treatment; 4) cooling the casting blank; (5) rolling and heat treatment are conducted, specifically, rough rolling is conducted through a 3800 mm four-roller reversible rolling mill, the initial rolling temperature is 1050-1150 DEG C, and the reduction rate is larger than or equal to 25%; finish rolling: a 4100mm four-roller mill is adopted, the finish rolling temperature is 850-900 DEG C, and the thickness tolerance is + / -0.5 mm; cooling control is conducted, laminar flow accelerated cooling is adopted, the cooling rate is 15-25 DEG C / s, the final cooling temperature is 500-600 DEG C, and grain coarsening is inhibited; quenching: performing oil quenching to 150 DEG C or below, wherein the cooling rate is greater than or equal to 20 DEG C / s; and tempering: carrying out heat preservation at 620 DEG C for 30 minutes, and carrying out air cooling. The invention aims to prepare the high-strength steel which not only meets the strength requirement but also has good processability and economic benefits by accurately controlling the addition amount of the rare earth element Ce and production process parameters.

The invention provides a three-roller modular rolling unit and belongs to the technical field of rolling equipment.The three-roller modular rolling unit comprises a mounting base, a plurality of C-shaped three-roller mill assembling frame bodies are arranged on the mounting base, and a base frame body is arranged in the multiple C-shaped three-roller mill assembling frame bodies in a penetrating mode; the three-roller reducing and sizing precision rolling mill is detachably mounted on the C-shaped three-roller rolling mill assembly frame body through the base frame body; a driving part for driving a transmission shaft of the three-roller reducing and sizing precision rolling mill to rotate is arranged on the C-shaped three-roller rolling mill assembly frame body; a pinch roll device, a guide device and a leading-out guide cylinder are arranged on the base frame body. According to the three-roller modular rolling unit, through modular design, the number and layout of the three-roller reducing and sizing precision rolling mills on the whole three-roller modular rolling unit can be flexibly adjusted according to production requirements, the requirements of different customers for different passes of the unit can be met, the application range is wide, rapid replacement and maintenance can be achieved, and the production efficiency is improved. The rolling efficiency is improved.

The utility model relates to the technical field of ore processing equipment, in particular to a roller mill for ore crushing, which comprises a crushing box and a crushing mechanism, a screening mechanism is arranged at the bottom end in the crushing box, the crushing mechanism is positioned above the screening mechanism, and the crushing mechanism comprises a crushing component and an adjusting component. The ore crushing device has the beneficial effects that ores are uniformly crushed through the crushing assembly, then different crushing intervals are adjusted through the adjusting assembly, the ores with different sizes are crushed in an all-around mode, when the ores with large sizes are crushed, the crushing pressure of the ores is increased, meanwhile, the upper ends of the ores are pressed, the ores are prevented from shaking and popping out, and the crushing efficiency is improved. And therefore, the pressing force of the ore is increased, the contact area of ore crushing is increased, and the crushing effect of the ore is improved.

The method and the facility enable cement-based powders with reduced fiber concentration to be obtained. The method includes providing millimeter-sized fragments derived from waste fiber cement material. The debris is supplied to a roller mill (10) comprising a rotating horizontal grinding track (13) and one or more rollers (12) configured to rotate about a fixed axis of rotation wherein the debris is ground between the grinding track (13) and a lateral surface of the rotor (12) and reduced to agglomerates comprising microsized particles. The separation of these particles from the fibers takes place after drying during upward airflow in the milling chamber of the apparatus. In an air classifier (14), the particles of smaller size are separated from heavier fragments together with (light) fibers. After this, particles of smaller size are separated from the majority of the fibers in the screen (20).

The embodiment of the invention discloses a two-phase corundum crushing system optimization method and device based on a composite granulation process, and belongs to the technical field of control or regulation systems. The operation data of the two-phase corundum crushing system are collected in real time, the current optimal energy consumption and output ratio is calculated based on a multi-objective optimization algorithm, crushing parameters of the two-phase corundum crushing system are adjusted, and an optimization model of the two-phase corundum crushing system is constructed. And solving the multi-objective optimization problem of the optimization model by adopting a non-dominated sorting genetic algorithm in the optimization model, and adjusting the roller mill pressure of the two-phase corundum crushing system according to an optimization strategy generated by the balance scheme. According to the embodiment of the invention, the operation data of the crushing system is collected in real time, and the multi-objective optimization algorithm is combined to realize dynamic adjustment and optimization of the crushing parameters, so that the overall performance of the two-phase corundum crushing system is improved, the energy consumption is reduced, the product quality is improved, and the service life of equipment is prolonged.

The utility model relates to a secondary rolling plug for rolling a seamless tube, which is characterized in that a pipe throwing section, a rounding section, a wall-reducing uniform integrated transformation section, a compression rotating rolling section, a contact biting section and a contact section are sequentially formed on a plug body from right to left; and the outer side surfaces of the pipe throwing section, the rounding section, the wall reduction uniform integrated transformation section, the compression rotating rolling section, the contact biting section and the contact section are all revolution surfaces taking the axis of the plug body as the axis. Through the design of the surface shape of the top body, the surface of a non-ferrous metal tube is not easily scratched, and the technical problems that the roll shape of a conventional three-high rolling mill cannot realize biting rotation, clamping in the rolling process and smooth tube throwing in the non-ferrous metal rolling process are solved; when the plug body outputs lubricating oil, large metal extension and extension coefficients are achieved, the compactness of metal material structures is improved, the problems of multiple inner surface defects and spiral traces in the core rod rolling process are solved, and the quality problems caused by inner pitted surfaces and secondary oxidation in the large extension process are solved through a self-lubricating system.

The low-grade magnetite magnetic separation process comprises the following steps that 1, raw ore is crushed, the raw ore is magnetite with the magnetic iron content not higher than 10%, raw ore particles are obtained after the raw ore is crushed, and the particle size range of the raw ore particles is 1-2.5 cm; 2, primary strong magnetic separation is conducted on the raw ore particles, middlings and tailings I are obtained, the iron grade of the middlings is 14%-22%, and the iron grade of the tailings is 3%-5%; 3, the middlings are sequentially subjected to first-stage ore grinding, second-stage magnetic separation, second-stage ore grinding and third-stage magnetic separation, and iron ore concentrate and tailings III are obtained; and the tailings I are sequentially subjected to tailings grain decomposition and tailings magnetic separation to obtain tailings II and tailings III, and the tailings II are returned to secondary grinding again. According to the method, the tailings I are subjected to grain dissolving-regrinding optimization, the tailings I are subjected to secondary dissociation through a high-pressure roller mill or a dry crusher, micro-fine particle magnetic minerals are released, after magnetic separation is conducted, the tailings II are returned to the original process for further grain dissolving and magnetic separation, qualified iron ore concentrate products are obtained, and resource waste is avoided.

The invention provides a cold rolling method of high-precision ultra-thin strip special steel, which comprises the following steps: (1) the thickness of a steel coil before cold rolling is 2.5-3.0 mm, and a cold rolling production method of a pickling-continuous rolling combined unit and a twenty-roller combination is adopted; (2) a secondary cold rolling method is adopted, the raw materials are rolled to the middle thickness through five-rack four-roller continuous rolling in the first cold rolling process, and the target thickness is rolled from the middle thickness through secondary rolling of a 20-roller reversible rolling mill in the second cold rolling process; (3) in the first cold rolling process, a five-rack four-roller mill rolls the raw material from the thickness of 2.5 mm-3. 0mm to the middle thickness of 0.5 mm-0. 8mm, and the total reduction rate is 65%-80%; (4) carrying out secondary cold rolling by adopting a twenty-roller reversible mill for three-pass cold rolling; the reduction rate of the first pass and the reduction rate of the second pass are controlled to be 30%-36%, and the reduction rate of the third pass is controlled to be 20%-28%; and (5) the rolled product is 0.19 mm to 0.25 mm. And the thickness control precision is + / -1 [mu] m.

The invention discloses a double-direct-separation low-carbon beneficiation method for grinding and pulping extremely-lean magnetite, and belongs to the technical field of beneficiation. The method comprises the treatment processes of coarse crushing treatment of raw ore, primary screening, intermediate crushing, first-stage roller grinding, secondary screening, magnetic pulley waste throwing, fine ore dry separation, second-stage roller grinding, slurry making, wet screening, second-stage roller grinding, wet magnetic separation, first-stage ore grinding, dilution, first-stage magnetic separation, first-stage grading, first-stage ore grinding, concentration magnetic separation, second-stage ore grinding, second-stage magnetic separation, second-stage grading and the like. According to the invention, the traditional process of'three-section one-closed-circuit ore crushing, ultrafine crushing by a high-pressure roller mill, three-section ore grinding and three-section magnetic separation 'for treating extremely lean magnetite is optimized into the process of'two-section crushing, two-section roller milling, ball milling, vertical milling and stage magnetic separation' from the process flow; the traditional fine crushing operation is omitted, belt conveying is reduced, the amount of ore entering a mill is greatly reduced, dust generation points of a dressing plant are reduced, and the purpose of low-carbon, environment-friendly and efficient separation of extremely lean magnetite is achieved.

The invention provides modified composite light calcium carbonate as well as a preparation method and application thereof, and belongs to the technical field of functional inorganic powder. The preparation method comprises the following steps: mixing lime milk slurry with water to obtain slurry, and then adding a dispersing agent and a crystal form control agent to react in a carbon dioxide atmosphere to obtain light calcium carbonate powder; the preparation method comprises the following steps: crushing calcite raw ore, carrying out dry grinding by a ring roller mill to obtain calcium carbonate coarse powder, adding water and part of a pre-dispersing agent, pulping to obtain calcium carbonate slurry, adding the rest of the pre-dispersing agent and a silicon source, and sequentially carrying out grinding and spray drying to obtain superfine heavy calcium carbonate powder; mixing the light calcium carbonate powder, the superfine heavy calcium carbonate powder and the composite modifier, and modifying to obtain the modified composite light calcium carbonate. The modified composite light calcium carbonate prepared by the invention not only retains the regular crystal structure of light calcium carbonate, but also has the advantages of small particle size, high 2-micron content and large specific surface area of superfine heavy calcium carbonate.

The invention belongs to the technical field of ultra-lean magnetite crushing and beneficiation, and particularly provides an ultra-lean magnetite final powdering process combining a high-pressure roller mill with two-stage dry separation, which comprises the following specific steps: ultra-fine crushing, screening, first-stage dry magnetic separation and second-stage dry magnetic separation, and the ores return to the high-pressure roller mill to be crushed, the first to fourth steps are repeated, and the waste rocks are directly thrown out. According to the process, the secondary dry type magnetic separation process is added in the follow-up process of the screening process, oversize ore is subjected to secondary dry type magnetic separation and then returns to the high-pressure roller mill, the treatment principle that throwing can be carried out early, throwing can be carried out early, and collecting can be carried out early is achieved, waste rock and part of ore reaching the monomer dissociation degree are separated in advance, and the treatment capacity of the high-pressure roller mill is reduced; therefore, the problem that the treatment effect of the high-pressure roller mill final powder process on the ultra-lean magnetite is poor due to the fact that the disseminated particle size of the magnetite is not uniform is solved.

The invention provides a method for preparing 4N8-grade high-purity quartz sand through pegmatite high-pressure roller milling flotation, and belongs to the technical field of quartz purification processes. Crushing the quartz raw ore subjected to color sorting into quartz sand with qualified particle size, and carrying out screening and dry magnetic separation; mixing the quartz sand with qualified particle size after magnetic separation with water to form ore pulp, and then carrying out flotation; adding a first collecting agent into the ore pulp in the first flotation to remove mica; in the second flotation, a second collecting agent is added into the first flotation tailings, and feldspar is removed; and in the third flotation, a third collecting agent is added into the second flotation tailings, metal impurities are removed, and a final high-purity quartz sand product is obtained. Visible impurities are rapidly removed through the color sorter, ore is efficiently crushed into fine sand through the high-pressure roller mill, and the remarkable monomer dissociation effect is achieved; a novel flotation impurity removal system is developed, and the method is suitable for large-scale production and purification of high-purity quartz sand.

The invention provides an intelligent forecasting method, device and equipment for working condition indexes of a high-pressure roller mill and a storage medium, and the intelligent forecasting method for the working condition indexes of the high-pressure roller mill comprises the steps: building an operation index dynamic model according to the dynamic characteristics of the working condition of the high-pressure roller mill and the change of the operation indexes, the operation index dynamic model comprises a mechanism model and deep learning; and combining identification errors of parameters of the mechanism model in the operation index dynamic model with non-mechanism model variables in the deep learning model to construct a nonlinear deep learning dynamic system and the like. In order to solve the problem that the working condition indexes of the high-pressure roller mill are difficult to forecast, the intelligent forecasting method for the working condition indexes of the high-pressure roller mill is provided by combining the mechanism model with a deep learning method based on big data, and the forecasting problem of the working condition indexes of the high-pressure roller mill is solved.

The invention belongs to the technical field of coating breeding, and particularly relates to a pretreatment method for iron powder coating breeding. Comprising the following steps: (1) mixing granular urea, calcium superphosphate and potassium chloride to obtain granular fertilizer; (2) dissolving granular fertilizer in water to prepare a granular fertilizer aqueous solution, soaking the rice seeds in the granular fertilizer aqueous solution for 3-5 hours, taking out the rice seeds, spreading the rice seeds in a shade place, and airing the rice seeds for 10-20 minutes to obtain fertilizer-soaked seeds; (3) mixing iron powder, granular fertilizer and bentonite in a powerful mixer for 5-10 minutes to obtain an iron fertilizer mixture, and rolling the iron fertilizer mixture through a high-pressure roller mill to obtain a roller-milled material; the rice seeds are coated with iron powder, so that the dead weight of the seeds is increased, the floating rate and the bird damage loss rate are greatly reduced, and the purpose of direct seeding of the rice seeds can be achieved.

The invention provides an abnormal vibration prediction method of a roller grinding machine and an abnormal vibration prediction device of the roller grinding machine, which can predict the abnormal vibration of the roller grinding machine corresponding to the natural vibration frequency of the whole mechanical system including a grinding wheel and a workpiece. A method for predicting abnormal vibration of a roller grinding machine (10) that grinds the outer peripheral surface of a rotating roller (12) using a grinding wheel (14), the method comprising: an acquisition step for acquiring the outer peripheral surface of the rotating roller (12), and a prediction step for predicting the abnormal vibration of the roller grinding machine (10); acquiring a rigidity parameter related to the rigidity of the roller grinding machine (10) and a grinding wheel rotation parameter related to the rotation speed of the grinding wheel (14); and a prediction step for predicting abnormal vibration in the grinding step of the roll (12) using the rigidity parameter and the grinding wheel rotation parameter.

An abnormal-vibration-predicting method for a roll grinder that grinds an outer peripheral surface of a rolling roll with a grinding wheel while the rolling roll rotates includes an acquisition step and a prediction step. The acquisition step acquires a rigidity parameter related to a rigidity of the roll grinder and a wheel rotation parameter related to a rotational speed of the grinding wheel. The prediction step predicts an occurrence of an abnormal vibration in a process of grinding the rolling roll by using the rigidity parameter and the wheel rotation parameter.

The utility model discloses a strip steel rolling line four-roller mill which comprises an upper driving wheel, a lower driving wheel, an upper rolling wheel and a lower rolling wheel, the upper rolling wheel is connected with the upper driving wheel, the lower rolling wheel is connected with the lower driving wheel, the lower rolling wheel is located on the front side or the rear side under the upper rolling wheel, and the wheel diameter of the lower rolling wheel is the same as that of the upper rolling wheel. According to the strip steel rolling line four-roller mill, the upper driving wheel and the lower driving wheel respectively drive the upper rolling wheel and the lower rolling wheel to press strip steel, and the upper rolling wheel and the lower rolling wheel are staggered in the horizontal direction, so that the upper rolling wheel or the lower rolling wheel is sequentially contacted with the strip steel, the warping of the strip steel is pre-compensated and corrected, and the phenomena of head warping and head buckling of the strip steel are eliminated.

The invention discloses a numerical control vertical mill intelligent control system based on parameter self-optimization, and relates to the technical field of industrial grinding, the system collects grinding roller data of a vertical roller mill in real time through an arranged sensor group, and transmits the grinding roller data to the numerical control vertical mill intelligent control system for preprocessing to construct a stress coupling data set and a structure response data set; loading isomerism evaluation is carried out by calculating a loading isomerism index eta load and a loading isomerism boundary threshold T eta, and when loading isomerism exists, a disturbance return trend index beta rb is calculated. The method comprises the following steps: calculating a loading pressure reconstruction index Pyq, carrying out rebound failure risk assessment with a preset first pressure regulation critical threshold TP1 and a preset second pressure regulation critical threshold TP2, generating a regulation instruction according to an assessment result, and if continuous three rounds of regulation do not reach a benefit standard, automatically judging that a mechanical fault occurs and generating an early warning. The system can realize full-process intelligent closed loop of loading heterogeneous state identification, disturbance trend judgment and risk response regulation and control.

The utility model relates to a vertical roller mill powder concentrator which comprises a millstone, grinding rollers, a feeding pipe, a powder selecting assembly, a shell and an air supply pipe, the grinding rollers are arranged on the millstone in a staggered mode, the grinding rollers comprise inner rollers and outer rollers, the millstone is correspondingly provided with an inner grinding face and an outer grinding face, the portion, penetrating through the shell, of the feeding pipe is fixedly connected with the shell, and the powder selecting assembly is arranged on the outer shell. The feeding pipe is obliquely arranged above the grinding disc; the powder selecting assembly is arranged over the grinding disc, the air supply pipe is arranged below the side of the grinding disc, and hot air supplied by the air supply pipe conveys materials ground on the grinding disc upwards to the powder selecting assembly through the shell. According to the invention, different grinding rollers are simultaneously used for coping with materials with different particle sizes, so that the loss of equipment can be greatly reduced, and the purposes of improving the economic benefit and the production efficiency are achieved.

The utility model relates to a vertical roller flour mill which comprises a roller flour mill main machine consisting of an upper machine body and a lower machine body, a main shaft component positioned in the lower machine body and a power mechanism for driving the main shaft component to rotate, the main shaft component comprises a main shaft, an airflow shunting center disc capable of synchronously rotating along with the main shaft, a wear-resistant curve large ring, a center disc mounting seat and a lower air inlet duct, the airflow shunting center disc is mounted on the center disc mounting seat, the center disc mounting seat is mounted on the main shaft, and the lower end of the center disc mounting seat and the lower air inlet duct are mounted together; the wear-resistant curve large ring is mounted on the central disc mounting seat; an air duct is mounted on the upper machine body, and after external airflow enters the lower machine body through the air duct, most airflow blows fine powder into the upper machine body; the utility model has the advantages of reasonable structure, simple and convenient operation, double gas circuit structure, lower end gas inlet to avoid material accumulation, high efficiency and energy saving.

A grinding aid for a roller grinder is proposed, which is to be arranged on a flat base and is intended and designed to hold a cutting tool to be machined with the roller grinder in a fixed position and at a predetermined positioning angle relative to this base. The positioning angle of the blade of the cutting tool relative to the support plane is 90°, and the grinding aid has a purely mechanically acting, manually operable clamping device for clamping and holding the blade. This clamping device has a contact surface fixed in the grinding aid, oriented perpendicular to the support plane for applying one side of the blade, and a pressure surface manually displaceable parallel to the support plane and oriented parallel to the contact surface for pressing the other side of the blade.

The invention relates to a device for gear milling of a gear (17) with a first hob (1) and a second hob (3), wherein in a first process step the first hob (1) mills a top-side tooth flank profile into the gear (17), and in a second process step the second hob (3) mills a bottom-side tooth flank profile into the gear (17). According to the invention, in the second process step the second hob (3) is out of chip engagement with the top-side tooth flanks (19) formed in the first process step.

The utility model relates to the technical field of dry grinding and dry separation of iron ore and similar processes, and particularly discloses a dry grinding and dry separation system which comprises an incoming material conveying system, a roller mill, a dynamic powder concentrator, a dry classification cabin and a fine powder collecting and conveying system. A discharging hole of the supplied material conveying system is communicated with a feeding hole of the roller mill; a discharging hole of the roller mill is communicated with a feeding hole of the dynamic powder concentrator; a coarse particle material outlet of the dynamic powder concentrator is communicated with a material inlet of the dry type grading cabin; an oversize coarse particle discharging opening of the dry type grading cabin is communicated with a feeding opening of the roller mill; and a fine powder discharge hole of the dynamic powder concentrator is communicated with the fine powder collecting and conveying system. Finished product materials with various particle sizes can be provided, and the requirements of customers for different finished product particle sizes are met; fine powder screened by the dynamic powder concentrator is collected by a dust collector and then is directly conveyed to a tailing discarding procedure, so that the handling capacity of the dry classification cabin is reduced; the use condition of the dry-type grading cabin is optimized, and the system flow is simplified.

The invention relates to the technical field of intelligent control, in particular to an intelligent control system of a roller mill, which comprises a real-time abrasion loss detection unit used for acquiring an actual gap value between a grinding roller working surface and a wear-resistant lining plate in the running process of the mill; the wear trend prediction unit is used for predicting current and future wear data according to the actual gap value and the historical wear data; the gap adjustment decision-making unit is used for comparing future gap values and judging whether a gap compensation instruction is triggered or not; the servo execution unit is used for driving the position of the grinding roller in real time according to the clearance compensation instruction; and the closed-loop feedback unit is used for feeding back the actual gap value compensated by the servo execution unit to the wear trend prediction unit so as to update the wear rate. The system is used for automatically compensating the next abrasion condition of the grinding roller and the abrasion-resistant lining plate, and continuous dynamic compensation is achieved.