626results about "Mixing operation plant" patented technology

The utility model relates to the technical field of concrete spraying machines, and discloses a building concrete spraying machine which comprises a machine shell, a rotor spraying assembly is fixedly installed on the machine shell through a plurality of sets of fixers and used for spraying concrete raw materials, and a feeding hopper is fixedly installed above the rotor spraying assembly and used for feeding the concrete raw materials into the machine shell. A partition plate is arranged between the feeding hopper and the rotor spraying assembly, and a discharging hole is formed in the partition plate and used for communicating the feeding hopper with the rotor spraying assembly and conveying concrete raw materials into the rotor spraying assembly through the feeding hopper. According to the concrete spraying machine for the building, by arranging the discharging mechanism composed of the tip cone block and the stirring fan blades, arch breaking and concrete raw material stirring can be effectively achieved, and the discharging speed is increased.

The invention relates to a method for calculating optimised concrete formulations and providing process data (PD1; PD2) for controlling system components (214, 215, 216; 221, 222) for the purpose of specifically processing raw materials (RA, RB,...) to form solid fractions (FK1, FK2,...) to be prepared and / or producing concrete (BTN) or concrete products by means of the prepared solid fractions (FK1, FK2,...) and further already prefabricated solid fractions (FK#), wherein the method (100) is designed for the weighted combination of l+m grading curves (SLV1... SLV3; SLP1... SLP8) to form a result grading curve (SLE), wherein the grading curves each represent a grain size distribution of one of the solid fractions (FK1, FK2, FK3...) given or not given, but still to be prepared by processing raw materials (RA, RB...); and wherein the method (100) is designed to match the result grading curves to a predefinable sample grading curve (SLM) which represents a grain size distribution with maximum packing density, as a result of which the optimised result grading curve (SLE) describes an ideal combination of all l+m solid fractions (FK1, FK2,... FK#) and the process data thereof for a sufficiently maximum packing density.

A containerized concrete batch plant is disclosed, comprising a container configured to contain a concrete batch plant to permit the transportation of the concrete batch plant. The concrete batch plant comprising one or more aggregate storage silos to receive a plurality of concrete elements. The one or more aggregate storage silos pour the concrete elements onto a conveyor based on quantity determination by a computer via a deductive scale. The conveyor transfers the concrete elements to a two-shaft mixer. An auger-fed hopper has an auger that is directly exposed to the contents inside the two-shaft mixer and transfers the contents inside the two-shaft mixer into the auger-fed hopper. A concrete pump has access to the auger-fed hopper and pumps the concrete inside the auger-fed hopper into a concrete output hose with a concrete output opening. A knuckle crane and / or hydraulic arms holds supersacks above the aggregate storage silos and the two-shaft mixer.

This invention discloses a continuous, high-efficiency, automatic dry-mixed mortar preparation equipment, relating to the field of mortar preparation technology. It includes a sand drying device and a feeding hopper. A sand particle screen is installed on one side of the sand drying device, and a screw conveyor connects the sand drying device and the sand particle screen. The dried sand enters the sand particle screen via the screw conveyor. Under the action of a first and second uniform material assembly, the mortar on the first conveyor belt consists of coarse sand, fine sand, cement, and filler laid out in sequence. Because the fine sand can fill the gaps in the coarse sand, reducing the relative movement space of the coarse sand and increasing internal friction, the cement and filler can be positioned on top of the coarse and fine sand. The dry-mixed mortar is stacked in a layered structure in a packaging bag using an anti-segregation telescopic tube, reducing stratification during bagging and transportation after mortar preparation, and reducing the mixing time between the mortar and water in the later stages.

The invention relates to the technical field of powder feeding, and discloses a powder feeding device for a concrete mixing plant, which comprises an outer cylinder, a discharging hopper is arranged at the bottom, a top cover is arranged at the top, a feeding structure is arranged on the top cover, a bag opening connecting structure is arranged at an inlet of the feeding structure, and a crushing and screening structure is slidably arranged in the outer cylinder. The crushing and screening structure comprises a screening module, a crushing module and a vibration dust removal module; the vibration dust removal module comprises a ratchet wheel rod and a supporting rod which are fixed to the outer cylinder, ratchets are arranged at the bottom of the ratchet wheel rod, the screening module is provided with a screen, one end of a rotating shaft of the screen is movably connected to the ratchet wheel rod in a sleeving mode and provided with a transmission ratchet wheel meshed with the ratchet wheel rod, and the other end of the rotating shaft of the screen is movably connected to the supporting rod in a sleeving mode and provided with a supporting plate; and a supporting spring is arranged between the supporting plate and the supporting rod. Compared with the prior art, the dust removal device has the advantage that residual powder is shaken off through vibration generated by the vibration dust removal module.

Systems, computer program products, and methods are described herein for quantum material-related characterizations. With reference to an example method, the method interacts one or more quantum states with a target material, generates one or more first data elements based on a measurement associated with the interaction of the one or more quantum states with the target material, and outputs the one or more first data elements. The method further determines a change in at least one quantum state of the one or more quantum states after the interaction with the target material, generates one or more second data elements associated with a characteristic of the target material based on the determined change in the at least one quantum state, and outputs the one or more second data elements.

The invention discloses a high-efficiency filtering and dedusting mixed mortar integrated production system, and relates to the technical field of mixed mortar production, the high-efficiency filtering and dedusting mixed mortar integrated production system comprises an intelligent pre-separation filtering unit, and the intelligent pre-separation filtering unit is used for carrying out primary pre-separation on large-particle impurities and solid particles in raw materials; a double-layer rotational flow filter element with a self-cleaning function is arranged in the intelligent pre-separation filter unit, the outer layer of the double-layer rotational flow filter element is a wear-resistant ceramic coating, and the inner layer of the double-layer rotational flow filter element is made of an elastic polymer material. By designing the double-layer self-cleaning rotational flow filter element, the differential pressure self-adaptive filter screen dust removal unit and the online regenerated energy recovery device, the functions of full-process efficient dust removal and energy recovery are realized, the problems of large traditional dust removal resistance and energy waste are solved, the pressure difference is effectively reduced, the energy consumption is reduced, and the continuous online operation time is prolonged.

The invention provides a dry red mud argillization device and argillization method. The dry red mud argillization device comprises an argillization bin and a stirring tank A, the argillization bin is mounted on the ground through a bracket, and the bottom of the argillization bin is higher than the top surface of the stirring tank A; a discharging platform is arranged beside the argillization bin; the left side wall and the right side wall in the argillization bin are inclined planes which are inclined from outside to inside and extend downwards, the front side wall and the rear side wall in the argillization bin are vertical planes, the bottom surface of the argillization bin is a horizontal plane, a stirring groove in the front-back direction is formed in the middle of the bottom surface, and a horizontal spiral stirrer is arranged in the stirring groove; a sealing cover is arranged at the top of the stirring tank A, a stirring mechanism is arranged in the stirring tank A, and a water inlet pipe in the clockwise tangential direction is arranged on the lower portion of the side wall of the stirring tank A; an outlet of the stirring tank is connected with a sludge discharge tank; the tail end of the bottom surface of the sludge discharge tank penetrates through a sealing cover through a discharge nozzle and enters the stirring tank A; according to the invention, dry red mud can be conveniently and rapidly converted into red mud slurrying slurry, and the prepared slurrying slurry has good fluidity and fine granularity.

The present invention allows for better control over strength in concrete mixes and mix designs, while minimizing the over-use of cement and promoting sustainability within the industry. Disclosed are novel method and system which employ a diagnostic delta data (DDD) curve, or, in other words, data that displays a curvilinear relationship when plotted on a visual graph, as obtained by considering the differences (e.g., subtractive differences or ratios) as between (i) target slump and target (or maximum) water content, and (ii) slump and water content values as determined using an automated slump monitoring system which measures slump and water content in the concrete mix during delivery. This DDD curve can then be compared to monitored delta slump and delta water content for later or other deliveries, such that adjustments can be made to the concrete mix or mix design, in a manner that encourages avoidance of cement over-dosing or over-prescription.

The utility model provides a movable concrete mixing plant. The movable concrete mixing plant comprises a concrete mixing assembly and a track flat car assembly, the concrete stirring assembly comprises a liquid material supply single piece, a powder material supply single piece, a gravel supply single piece and a stirring single piece connected with the liquid material supply single piece, the powder material supply single piece and the gravel supply single piece. The rail flat car assembly comprises a first flat car and a second flat car, the single stirring piece, the single liquid material supply piece and the single powder material supply piece are all arranged on the first flat car, and the single gravel supply piece is arranged on the second flat car. The liquid material supply single piece, the powder material supply single piece and the stirring single piece are integrated on the first flat car, and the gravel supply single piece is arranged on the second flat car, so that the whole equipment can be transported on a rail and can also enter a tunnel and other places with limited space, the space is saved, meanwhile, the carrying capacity of all materials is guaranteed, and the working efficiency is improved. And the requirement of concrete materials required for repairing time diseases of one skylight is met.

The utility model belongs to the technical field of concrete preparation, and particularly relates to a mining concrete preparation system which comprises a feeding device, a cement feeding device, a belt conveyor, a spiral conveying mechanism and a stirring machine, the feeding device comprises a stock bin support and a plurality of stock bins, weighing sensors are arranged between the stock bins and the stock bin support, the stock bins correspond to the belt conveyor in an up-and-down mode, and the spiral conveying mechanism is connected with the stirring machine. The discharging end of the belt conveyor extends to a position above the feeding hole of the stirrer; the cement feeding device comprises a cement bin support, a cement bin, a feeding hopper, a cement feeding vertical screw conveyor and a cement feeding horizontal screw conveyor, the cement bin is arranged on the cement bin support, a weighing sensor is arranged at the lower end of the cement bin support, a screw conveying mechanism is arranged below the cement bin in a communicating mode, and a discharging port of the screw conveying mechanism is located above a feeding port of the stirring machine. Various raw materials needed by concrete are directly determined through the weighing sensor and conveyed to the stirring machine to be mixed and stirred to achieve concrete preparation, large-batch concrete preparation can be rapidly achieved, and the preparation efficiency is effectively improved.

The invention discloses geopolymer concrete based on waste concrete micro powder and a preparation device and method, and belongs to the technical field of building materials, the geopolymer concrete comprises a crushing system, a grinding device, a stirring device and a shaping device; the smashing system is used for smashing waste concrete to form waste concrete fragments and conveying the waste concrete fragments into the grinding device, and the grinding device is used for grinding the waste concrete fragments to form waste concrete micro powder. According to the invention, the waste concrete micro powder is used as a mixed material or admixture for replacing cement and reacts with water to generate hydrated calcium silicate gel and calcium hydroxide; the hydrated calcium silicate gel can bond the aggregate to form a compact structure with certain mechanical strength, and the calcium hydroxide can react with amorphous SiO2 and Al2O3 in the waste concrete micro powder to generate hydrated calcium silicate, hydrated calcium aluminate or hydrated calcium aluminosilicate; a series of problems caused by nowhere to stack a large amount of waste concrete are effectively solved.

The invention discloses a light building material product production system which comprises a mixing treatment production line, a building material forming production line, a goods shelf logistics area, a building material packaging production line, a steam curing chamber and a fine processing line, the mixing treatment production line comprises a batching stirrer, and the building material forming production line comprises a vacuum extrusion device. A belt conveying line is connected and installed between the material mixing treatment production line and the building material forming production line, a first building material conveying belt is installed on the rear channel of the vacuum extrusion device, and the first building material conveying belt and the building material packaging production line are in butt joint with a goods shelf logistics area. The light building material production system is reasonable in layout, a large number of automatic and intelligent devices are used in a production line to cooperate with production, the light building material production system has the advantages of low labor, high efficiency and automatic production, solid waste garbage of various different sources is used as a building material source, the solid waste resource comprehensive utilization approach is expanded, and the production cost is reduced. And a new thought and a new breakthrough are brought to solid waste resource utilization.

Improve the prediction accuracy when predicting the quality of fresh concrete using a prediction model. 【Solution means】A construction step of constructing a prediction model by machine learning based on training data including a plurality of data sets, an acquisition step of acquiring a plurality of feature amounts obtained when producing fresh concrete using a mixer, and a prediction step of using the prediction model to acquire a predicted value of quality corresponding to the plurality of feature amounts acquired in the acquisition step. In each of the plurality of data sets, a plurality of feature amounts and a correct value of quality are associated with each other. The plurality of feature amounts include one or more load feature amounts related to the power load value of the mixer when mixing the concrete material or stirring the fresh concrete. In the construction step, the prediction model is constructed such that one or more feature amounts selected from the plurality of feature amounts and the predicted value of quality are associated with each other by a decision tree. A method for predicting the quality of fresh concrete.

The invention relates to the technical field of intelligent manufacturing control, in particular to an air cooling control method and system for multi-aggregate pre-cooling. According to the scheme provided by the invention, classified and bin-divided independent pre-cooling is performed according to different aggregate particle sizes and pre-cooling characteristics, so that the cooling effect is good, the pre-cooling time is saved, and the working efficiency is improved. Furthermore, through periodic dynamic pre-cooling control and adjustment, in combination with real-time monitoring of the aggregate temperature of each bin and dynamic calculation of required cooling capacity distribution air cooling, synchronization of the cooling process of each aggregate is ensured, and the pre-cooled aggregates with different particle sizes and different characteristics synchronously reach the preset delivery temperature within the target time. Meanwhile, the scheme of the invention has good robustness for interference factors such as initial temperature fluctuation of the aggregate, environment temperature change and the height of the stock bin position, can automatically adjust the distribution strategy, and keeps the stability of the pre-cooling effect.

The invention discloses a system for on-line preparation of fluid solidified soil from high-water-content muck, which comprises a dispersion stirrer, a screening and crushing all-in-one machine arranged below the dispersion stirrer, a slurry storage box arranged below the screening and crushing all-in-one machine, a stirring mechanism arranged in the slurry storage box, and a slurry supply pipe communicated with a shunt pipe of a mixer, the two ends of the flow dividing pipe communicate with mixing branch pipes correspondingly, the mixing branch pipes communicate with the middle storage tank through powder supply pipes, a first air spraying pipe communicates with the interior of the middle storage tank, and the two mixing branch pipes communicate with the mixing pipe. The screening and crushing all-in-one machine is used for discharging the slurry to the slurry storage box and conveying the crushed hard blocks to the slurry storage box. Compared with the prior art, the system has the advantages that the slag can be fluidized and refined through the dispersing stirrer and the screening and crushing all-in-one machine, the requirement for raw materials is lowered, and then the slurry storage box is used for buffering and then is matched with the mixer and the powder supply mechanism to achieve online mixing of the flow-state solidified soil.

This invention discloses a curing agent slurry preparation device, a curing agent slurry preparation method, and a fluidized solidified soil production method. In the preparation method, a weight sensor collects the weight change curve in real time during auger feeding, identifies the excess material discharge, and calculates the correction value for the next batch's shutdown advance. Water is injected and preliminary mixing is performed. The slurry is injected into the lower mixing chamber. After adjustment according to the correction value, the next batch is prepared. During the lower mixing, the torque of the second agitator is collected, a rheological curve is fitted, and the homogeneity is determined to be up to standard after the torque fluctuation rate is below a threshold and maintained for a set time, at which point the material is discharged. The upper and lower layers operate alternately in parallel cycles. The fluidized solidified soil production method of this invention includes: excavating a mud pit nearby and mixing it into mud; preparing the curing agent slurry using the above method; and pumping the slurry to the mud pit and mixing it into fluidized solidified soil. This invention employs a "two-step" process to prepare the curing agent and fluidized solidified soil in stages, avoiding long-distance transportation of the finished solidified soil and improving construction efficiency and the stability of the solidified soil quality.

To provide a concrete plant, a concrete plant control method and a program which enable a mobile plant to produce special concrete, etc. manage to be of high quality at a construction site.SOLUTION: A concrete plant comprises: a transport vehicle 10; and a concrete plant unit 20 which is mounted on a loading platform 11 of the transport vehicle 10 and carried therewith. The concrete plant unit 20 has at least a mixer 50 and a control device 60 which executes drive control of the mixer. The control device 60 executes: primary mixing control which causes the mixer 50 to execute primary mixing to produce a primary mixed material; secondary mixing control which causes the mixer 50 to execute secondary mixing to mix the primary mixed material with an admixture to produce a secondary mixed material; and additional mixing control which causes the mixer to execute at least either additional primary mixing or additional secondary mixing when the primary and secondary mixing do not satisfy primary and secondary management standard values set for each thereof at time of completion of either or both of the primary and secondary mixing.SELECTED DRAWING: Figure 17

The automatic clay processing line for porcelain production comprises a clay mixing shell, a roller conveyor is arranged on the right side of the clay mixing shell, and the automatic clay processing line further comprises a clay mixing mechanism and a segmenting mechanism; the mud mixing mechanism comprises an annular shell, a separation assembly, a mud mixing head, a cylinder, a power assembly, a self-folding assembly and a mud discharging power assembly, the annular shell is installed in the mud mixing shell, the mud mixing head is installed in the annular shell through the separation assembly, the cylinder is arranged on the upper side of the mud mixing head, and the power assembly is arranged between the annular shell and the cylinder; according to the automatic clay processing line for porcelain production, through the transmission element, clay on the edge portion in the clay mixing process can be automatically moved to the clay mixing center portion, the clay mixing effect of the device is improved, the clay mixing discharging component of the device does not have position dead angles, the clay sticking phenomenon at the clay mixing portion is avoided, and the production efficiency is improved. And the device can adjust the cutting length of the clay according to use requirements, and is convenient to use.

The utility model relates to the technical field of concrete production, in particular to a mixing plant production system which is provided with an aggregate storage bin, an aggregate pre-cooling bin and a mixing plant in sequence, and links of aggregate preparation, aggregate pre-cooling and aggregate feeding are separately arranged, so that the waiting time of aggregate feeding is shortened, and the production efficiency is improved.

The application relates to a pit mud preparation system, which comprises a feeding device through which pit mud is fed, a first cutting device which cuts the pit mud, a first conveying device, a second cutting device which cuts the pit mud again, a second conveying device, a first stirring device which stirs the pit mud after adding water, a granulating device which prepares the pit mud into strips, a third conveying device, a second stirring device which stirs the pit mud again after adding water, and a forming box. The application can improve the uniformity of the pit mud when the pit mud is cut through the first cutting device and the second cutting device. The pit mud is stirred twice through the first stirring device and the second stirring device, and the pit mud is granulated again through the granulating device between the two times of water stirring, so that the soaking effect of the pit mud is improved, the phenomenon that the pit mud is dry and wet after water stirring is avoided, the stirring effect of the pit mud is guaranteed, and the quality of the prepared pit mud is guaranteed.

The invention discloses a concrete pouring trolley for train maintenance pit construction and an operation method for construction of the concrete pouring trolley. The trolley comprises a traveling part and a pouring part. The traveling part comprises a chassis, a wheel assembly mounted on the chassis and a traveling control system; the pouring part comprises a concrete bin, the concrete bin is arranged on the chassis, a stirring device is arranged in the bin, and a discharging control system is arranged at the bottom of the bin; the wheel assembly comprises at least four wheels which are oppositely arranged in pairs, and the wheels are rail attaching wheels, so that the trolley can run on the steel rails; the driving control system is used for controlling the speed and driving of the trolley; the discharging control system is used for adjusting the concrete discharging angle and the concrete discharging amount; in the construction process, the discharging control system and the traveling crane control system are matched to control the pouring speed of concrete, the pouring quality is ensured, the cost of measuring equipment is saved, it is ensured that the pouring structural precision meets the design requirement, and good practical value and application prospects are achieved.

The utility model discloses a vacuum chamber with a double-propulsion material distribution device, which belongs to the technical field of vacuum pugging and comprises a pug feeding mechanism and a vacuum pugging chamber which are communicated with each other through a material distribution sieve plate, two pugging propulsion lines are arranged in the vacuum pugging chamber, and the two pugging propulsion lines respectively receive pug which is distributed by the material distribution sieve plate. And two pugging propelling lines are integrated in a vacuum cavity of the vacuum pugging chamber. The pug is distributed by the distribution sieve plate and then uniformly falls onto the corresponding pug propulsion lines, and is respectively and independently subjected to homogenization mixing and vacuum degassing treatment, and finally the pug is molded by the distribution lines and then pushed out. The capacity expansion of the vacuum pugging equipment is realized through double-line independent treatment, the production efficiency is improved, and the high integration degree of double lines ensures that the floor area expansion rate of the equipment is extremely low. Due to the fact that the pug of the double lines is processed in parallel after being distributed, the independent operation mode ensures the processing quality of the pug of each single line, and the homogenization and degassing effects are guaranteed.

The invention discloses inorganic light aggregate thermal insulation mortar production equipment and a production method.The inorganic light aggregate thermal insulation mortar production equipment comprises a cement tank, a sand tank, a metering bin, a stirring bin, a semi-finished product bin, a light aggregate bin and a plurality of weighing bins, a discharging opening of the stirring bin is connected with the semi-finished product bin, the semi-finished product bin is connected with a plurality of conveying mechanisms, and the conveying mechanisms are connected with a conveying belt; a plurality of weighing bins are arranged on the light aggregate bin, a packaging mechanism is arranged at an outlet of each weighing bin, a plurality of discharging ports are formed in the light aggregate bin, each discharging port of the light aggregate bin is connected with a material receiving tank through a feeding pipe, a discharging valve is arranged at a discharging port of each material receiving tank, and the discharging valves are arranged on the discharging ports of the material receiving tanks. A feed port of each weighing bin is correspondingly provided with a discharge port of one conveying mechanism and a discharge port of one receiving tank; the mixed semi-finished products are weighed in the weighing bin, after weighing is completed, the light aggregate needing to be added into each bag of products is independently added into the semi-finished products, and it is guaranteed that the content of the light aggregate contained in each bag of products is stable.

The utility model discloses a grouting device for building construction, which belongs to the technical field of building construction and comprises a bottom plate, moving wheels are arranged at four corners of the bottom of the bottom plate, a push handle is fixedly connected to one side of the bottom plate, a grouting mechanism is arranged at the top of the bottom plate and comprises a conveying hose, and a storage box is arranged behind the grouting mechanism. An opening and closing door is hinged to the rear side of the storage box, a feeding hole is formed in the side wall of the storage box, a winding assembly and a heating assembly are arranged in the storage box, the winding assembly is used for storing the conveying hose, the heating assembly is used for heating the conveying hose, and the conveying hose is prevented from being too hard. The device has the beneficial effects that the storage box is arranged, the heating assembly is arranged in the storage box, the conveying hose is heated through the heating assembly, and the situation that the conveying hose becomes hard in winter and is inconvenient to wind and release is avoided.

The invention relates to high-strength and high-toughness concrete production equipment and a production method thereof, and the high-strength and high-toughness concrete production equipment comprises a material mixing container which is internally provided with a stirring mechanism; the liquid material hopper is used for quantitatively discharging a liquid material into the mixing container; the solid material hopper is used for quantitatively discharging solid materials into the mixing container; a cement storage cavity and a fiber storage cavity are separately formed in the upper side of the interior of the cement discharging hopper; the cement mixer comprises a driving shaft driven by a first lifting driving mechanism, the bottom end of the driving shaft is fixedly connected with a plurality of first partition plates, the bottom of the driving shaft is downwards provided with a connecting piece through a second lifting driving mechanism, the outer side of the connecting piece is fixedly connected with a plurality of second partition plates, and the first partition plates and the second partition plates are arranged in a staggered mode. And the rotation driving mechanism is used for driving the driving shaft to rotate. According to the invention, the hydrogel fibers can be effectively and uniformly dispersed into the concrete, so that the strength and toughness of the concrete are practically and effectively improved.

The invention discloses waste brick micro powder based geopolymer concrete and a preparation device and method, and belongs to the technical field of building materials, the waste brick micro powder based geopolymer concrete comprises a crushing device, a grinding device, a conveying device, a stirring device and a forming device; the crushing device is used for crushing waste bricks to form waste brick fragments, the grinding device is used for grinding the waste brick fragments to form waste brick micro powder, and the two ends of the conveying device correspond to the discharging end of the crushing device and the feeding end of the grinding device correspondingly and are used for conveying the waste brick fragments. According to the invention, the waste brick micro powder is used as a mixed material or admixture for replacing cement and reacts with water to generate hydrated calcium silicate gel and calcium hydroxide; the hydrated calcium silicate gel can bond the aggregate to form a compact structure with certain mechanical strength, and the calcium hydroxide can react with amorphous SiO2 and Al2O3 in the waste brick micro powder to generate hydrated calcium silicate, hydrated calcium aluminate or hydrated calcium aluminosilicate; a series of problems caused by nowhere to stack a large amount of waste concrete are effectively solved.

The utility model relates to the field of constructional engineering machinery, and discloses a material conveying system and a mixing plant, the material conveying system comprises an elevator, a buffer container and a feeding conveying device, the elevator comprises a feeding position, a discharging position and a lifting container capable of moving between the feeding position and the discharging position; the buffer container is provided with a buffer feed port and a buffer discharge port, and the buffer discharge port is used for feeding materials to the lifting container at the feeding position and is provided with an openable discharge door; the feeding conveying device is used for feeding materials to the temporary storage feeding port. According to the material conveying system and the mixing plant, the material conveying efficiency can be improved, and therefore the production efficiency of the mixing plant is improved.

The invention relates to a device and a method for cooling an aggregate for the production of fresh concrete. The device comprises a cooling drum (2) which is designed to continuously convey cooling water (16) and the aggregate in counter-flow while contacting one another, wherein the cooling drum (2) has a cylindrical housing (4), wherein a spiral conveyor (5) having a spiral coil (14) is arranged in the interior of the housing (4), wherein the cooling drum (2) has, in the longitudinal direction of the housing (4), an inlet for the aggregate and an outlet (7) for the cooling water (16) on one end and an outlet for the aggregate (6) and an inlet (6) for the cooling water (16) on the other end. According to the invention, the spiral conveyor (5) is a modification of a screw conveyor in which a central axial drive shaft is dispensed with.