6 results about "Particle segregation" patented technology

The invention discloses a CuCr contact and a preparation method thereof, and belongs to the field of alloy contact manufacturing, the CuCr contact is divided into an arc contact area, a transition area and a conductive connection area, and the Cr content of each area is in gradient distribution and is sequentially reduced, so that interface stress concentration can be avoided, and the structural compatibility and mechanical reliability of the whole contact are improved; meanwhile, integrated forming is achieved through the 3D printing technology, the size and the component boundary of each area can be accurately controlled, the complex structure design requirement of the contact is met, and the problems that in the prior art, performance gradient cannot be achieved according to the function requirements of different parts of the contact, and the material utilization rate is low are solved; the printed contact does not have the phenomena of composition segregation, agglomeration, uneven pores and the like, and the problems that in the prior art, Cr elements are difficult to distribute uniformly in a Cu matrix, Cr particles are prone to segregation and agglomeration, local ablation resistance is insufficient, and burning resistance is low are solved.

The utility model discloses a granularity segregation prevention structure for an alumina stock bin, which comprises a stock bin body and a material guide pipe, the material guide pipe is fixedly arranged in the stock bin body, the outer wall of the material guide pipe is provided with an open pore, the material guide pipe is provided with a turning plate, and the turning plate is rotatably arranged at the port of the open pore. A baffle is arranged on the inner wall of the stock bin, the baffle is arranged in an inclined mode, and one end of the hinge is movably installed in an included angle between the baffle and the stock bin. According to the particle size segregation prevention structure for the aluminum oxide stock bin, through the cooperation of the material guide pipe and the turning plate, the flying phenomenon of aluminum oxide in the stock bin can be reduced, the particle size segregation of the aluminum oxide in the stock bin is reduced to the maximum extent, the anode effect coefficient of an electrolytic bath is greatly reduced, and the service life of the electrolytic bath is prolonged. A good feeding condition is provided for a zero anode effect production mode; and moreover, the generation amount of perfluorocarbon can be reduced, greenhouse gases are greatly reduced, and the method is green and environment-friendly.

The invention relates to the technical field of bulk material transportation, and discloses a dry-mixed mortar low-residue efficient unloading transportation method which is based on a discretization pneumatic unit array with the surface covered with a pneumatic elastic variable stiffness one-way valve, and switching of a valve body between a vertical fluidization mode and a horizontal conveying mode is achieved by controlling input pressure. The method comprises the following steps: firstly, synchronously applying fluidization maintaining pressure to a whole domain, so that a material is in a subcritical quasi-fluid state without static friction, and particle segregation is prevented; then a time sequence traveling wave signal is generated, a control unit sequentially outputs traveling wave driving pressure, and directional horizontal jet flow is generated to drive the materials to move towards a discharging opening; and in the later discharging stage, high-frequency pulse excitation is applied to the locked edge area, the central negative pressure induction module is cooperatively started to construct a push-pull flow field, and residual materials are forcibly gathered and discharged. The problems of segregation, mousehole residues and dead corner residues in the dry-mixed mortar transportation process are effectively solved, and the unloading efficiency is remarkably improved.

The invention discloses an asphalt mixture particle segregation evaluation method and application, and relates to the technical field of road engineering material quality detection. According to the method, an asphalt mixture digital test piece model is constructed through a discrete element method or an X-CT scanning technology, three-dimensional centroid coordinates and volume and particle size information of aggregate particles are recognized, a test piece is equally divided into a plurality of layers in the height direction, and volume data of aggregate of each layer and each grade is counted according to the particle position; and calculating an overall uniformity index Lsum, a layering deviation index Li and a grading deviation index Lj based on the volume deviation. According to the method, the problem of inaccurate evaluation caused by dependence on indirect indexes such as grading and void ratio in the prior art is solved, the volume distribution uniformity of aggregate particles in a three-dimensional space can be directly and quantitatively reflected, and reliable technical support is provided for asphalt mixture construction process optimization, engineering quality evaluation and process control.

The utility model discloses a kind of mixed equipment for cementing material production based on industrial solid waste, belong to the cementing processing technical field of industrial solid waste.A kind of mixed equipment for cementing material production based on industrial solid waste, including base and the mixed box of being installed on base, the lower part of mixed box is fixedly connected with discharge pipe, the upper part of mixed box is fixedly connected with feed pipe, further include: two groups of spiral stirring rod of being rotationally connected in mixed box;The utility model is provided with by setting up flow guide plate, guide column, arc concave and runner, for lithium slag, water slag and other fine powder, the dispersibility of convolute action of arc concave is enhanced, avoid agglomeration, for building recycled material, steel slag and other particles, the cutting of rhombic guide column and the eddy current effect of arc convex promote intergranular collision, reduce particle segregation, the flow speed of different particle size raw materials can also be balanced by the symmetrical design of two inclined surfaces, and then improve the mixing effect of subsequent, improve the mixing precision.

This invention provides a method for manufacturing a water-absorbing agent composition. This method, in manufacturing the water-absorbing agent composition using a water-absorbing resin with a large specific surface area, can suppress particle segregation caused by transport and improve particle flowability while maintaining its water-absorbing properties. The manufacturing method of this invention includes: a step of mixing a water-soluble flowability enhancer into the water-absorbing resin under specific conditions during or after a surface crosslinking step. The method for manufacturing the water-absorbing agent composition satisfies all of the following (a) to (d): (a) The specific surface area of ​​the water-absorbing resin is 25 m². 2 (a) When the above-mentioned water-soluble flowability improver is mixed into the water-absorbing resin, the form of the above-mentioned water-soluble flowability improver is an aqueous solution of 0.01% by mass or more and 20% by mass or less; (b) When the above-mentioned aqueous solution is added to / mixed into the water-absorbing resin, the average droplet diameter of the above-mentioned aqueous solution is 10 μm or more and 1 mm or less; (d) When the above-mentioned aqueous solution is added to / mixed into the water-absorbing resin, the mixing power index is 70000 or more.