A screen apparatus for screening granulate, in particular moist and/or dry granulate, having a screen housing having a base, a cover and a side wall, an inlet for the granulate arranged on the screen housing, an outlet for the screened granulate arranged on the screen housing, a screen arranged in the screen housing and an inlet for transfer air. The outlet for the screened granulate, which is arranged on the screen housing is arranged on the side wall of the screen housing.

A classifying fluid bed granulation unit includes a perforated bed floor; a fluid bed section; a solid feed inlet or internal crushing device; a fluidization air inlet; a liquid solution or melt feed inlet and nozzles; an air outlet; and a product outlet; wherein the fluid bed section comprises at least one particle classification element comprising one or more vertically inclined channels having top and bottom end feed openings, and wherein the one or more vertically inclined channels have upper and lower side slots. In operation of the above fluid bed granulation unit, each channel of the element is separating particles into large particle and small particle fractions and transporting the large particle fraction upwards and the small particle fraction downwards in each channel, and the large particle and small particle fractions are transported out of the upper and lower side slots, respectively.

A classifying fluid bed granulation unit includes a perforated bed floor; a fluid bed section; a solid feed inlet or internal crushing device; a fluidization air inlet; a liquid solution or melt feed inlet and nozzles; an air outlet; and a product outlet; wherein the fluid bed section comprises at least one particle classification element comprising one or more vertically inclined channels having top and bottom end feed openings, and wherein the one or more vertically inclined channels have upper and lower side slots. In operation of the above fluid bed granulation unit, each channel of the element is separating particles into large particle and small particle fractions and transporting the large particle fraction upwards and the small particle fraction downwards in each channel, and the large particle and small particle fractions are transported out of the upper and lower side slots, respectively.

In a casting sand reclamation system and a casting sand reclamation method, an appropriate reclamation process is performed according to the properties of casting sand to improve the reclamation accuracy and the reclamation yield. Capacitance measuring devices 70 and 71 that measure the capacitance of casting sand 1 (recovered sand 1a or reclamation sand 1b) are arranged on an upstream side and a downstream side of a batch-type polishing device 7, and feedback control is performed based on the measurement results of the capacitances by these capacitance measuring devices 70 and 71. A sorting device 10 sorts the recovered sand 1a polished by the polishing device 7 into a sand grain component (reclamation sand) and a fine grain component (containing a binder), and has a capacity N times that of the polishing device 7. A control device 80 performs feedback control based on capacitance RU of the recovered sand 1a measured for each polishing process on an upstream side of the polishing device 7, and an average value of N capacitances RD of the reclamation sand 1b measured for each polishing process on a downstream side of the sorting device 10.

Provided is a gas-solid fluidized bed dry beneficiation process using a beneficiation density gradient, including: in a dry beneficiation system of a gas-solid fluidized bed, selecting coarse particles and fine particles; placing the coarse particles at a bottom of the dry beneficiation system, and placing the fine particles above the coarse particles, wherein the coarse particles and the fine particles are separated under an initial condition; under an effect of a gas flow, the coarse particles and the fine particles being fluidized to form a high-density beneficiation region and a low-density beneficiation region, respectively, and the coarse particles and the fine particles being mixed at a contact interface to form an intermediate-density beneficiation region; and feeding minerals to be beneficiated from an upper portion of the dry beneficiation system to pass through the low-density beneficiation region, the intermediate-density beneficiation region, and the high-density beneficiation region in sequence.

A compensating flow control assembly for a solid material separator such as a magnetic separator or air wash separator. The compensating flow control assembly automatically controls or adjusts the amount of contaminated shot blast media flowing from a hopper to a rotary magnetic drum, in the case where the solid material separator is a magnetic separator, or to an air chamber in the case where the solid material separator is an air wash separator, based upon the amount of contaminated shot blast media being fed to and held by the hopper.

A method for retrieving active material from a galvanic cell is provided. The galvanic cell includes an active material, a support for the active material and a binder for bonding the active material and the support. The method includes the following steps: (a) crushing the cells, in particular under inert gas or in a vacuum, so that solid cell fragments are also formed, (b) heating the solid cell fragments up to the decomposition temperature (T.sub.z), which is high enough to make the binder decompose so that it loses its binding properties, preferably under inert gas or in a vacuum, such that heat treated cell fragmented are formed, and (c) classifying the heat treated cell fragments, whereby (d) the classifying comprises air jet sieving and (e) the air jet sieving is carried out in such a way that the active material is separated from the support.

A method for retrieving active material from a galvanic cell is provided. The galvanic cell includes an active material, a support for the active material and a binder for bonding the active material and the support. The method includes the following steps: (a) crushing the cells, in particular under inert gas or in a vacuum, so that solid cell fragments are also formed, (b) heating the solid cell fragments up to the decomposition temperature (T.sub.z), which is high enough to make the binder decompose so that it loses its binding properties, preferably under inert gas or in a vacuum, such that heat treated cell fragmented are formed, and (c) classifying the heat treated cell fragments, whereby (d) the classifying comprises air jet sieving and (e) the air jet sieving is carried out in such a way that the active material is separated from the support.

The invention relates to a system for the gravimetric sorting of a mixture of substances during the processing and/or the recycling of residual building materials and/or demolition materials, comprising a fractioning unit (2) adapted to divide the mixture of substances into at least m fractions (A, B, C); at least n.Math.m gravimetric densimetric tables (A.1, A.2.2, A.3.2), arranged in m cascades each with at least n densimetric tables distributed to n stages, wherein the fractioning unit is coupled to them densimetric tables (A.1) of the first stage such that a different one of the at least m fractions can be supplied to each of the densimetric tables of the first stage; wherein, within each cascade, each densimetric table of a considered stage (A.2.2, A.3.2) is coupled to a densimetric table (A.1, A.2.2) of the preceding stage such that either the first partial fraction or the second partial fraction (12, 22) of the densimetric table (A.1, A.2.2) of the preceding stage can be supplied to the densimetric table (A.2.2, A.3.2) of the considered stage. An appropriate method is also part of the invention.

A device for classifying a material mixture of multiple materials has a first transport unit into which the material mixture to be classified is deposited by a supply device. A second transport unit is arranged downstream. A first chute is provided between the first and second transport, via which a first material with a first fluid resistance can be separated from the material mixture. At least one third transport unit is arranged downstream of the second transport unit, such that a transit route for the materials is formed between the second and third transport units. A second chute is provided between the second and third transport units, via which at least the second material with a second fluid resistance can be separated from the material mixture. The third transport unit is designed so that material can pass through and/or a fluid flow can pass through.