A magnetic separator comprises: at least one pair of guide rolls; and a conveyor belt that extends between the pair of guide rolls, and conveys a powdery and/or granular material containing ferromagnetic particles, wherein one guide roll of the pair of guide rolls is a hollow roll, and includes, in a hollow part thereof, a magnet roll including a plurality of magnets that are arranged along an inner peripheral surface of the guide roll in lines at intervals so that different magnetic poles alternate in a circumferential direction, and the magnetic separator further comprises a shield wall that covers a circular arc region of an outer peripheral surface of the guide roll except a circular arc region around which the conveyor belt is wound, to block magnetic lines of force from the plurality of magnets.

A magnetic separator comprises: at least one pair of guide rolls; and a conveyor belt that extends between the pair of guide rolls, and conveys a powdery and/or granular material containing ferromagnetic particles, wherein one guide roll of the pair of guide rolls is a hollow roll, and includes, in a hollow part thereof, a magnet roll including a plurality of magnets that are arranged along an inner peripheral surface of the guide roll in lines at intervals so that different magnetic poles alternate in a circumferential direction, and the magnetic separator further comprises a shield wall that covers a circular arc region of an outer peripheral surface of the guide roll except a circular arc region around which the conveyor belt is wound, to block magnetic lines of force from the plurality of magnets.

A method and system is used to process slag material to yield by-products including a finished iron rich product and a finished low iron fines product. The by-products may include a finished high iron product and a finished medium iron product. The method and system include size classifying the material into a plurality of sized groups prior to using magnetic separation to separate at least one of the sized groups into two portions having differing magnetic susceptibilities. The method and system may include more than one phase of size classifying the material into a plurality of sized groups and using magnetic separation to separate at least one of the sized groups into portions, where the average size of the material remaining after one phase is reduced prior to the subsequent phase.

A method and system is used to process slag material to yield by-products including a finished iron rich product and a finished low iron fines product. The by-products may include a finished high iron product and a finished medium iron product. The method and system include size classifying the material into a plurality of sized groups prior to using magnetic separation to separate at least one of the sized groups into two portions having differing magnetic susceptibilities. The method and system may include more than one phase of size classifying the material into a plurality of sized groups and using magnetic separation to separate at least one of the sized groups into portions, where the average size of the material remaining after one phase is reduced prior to the subsequent phase.

An apparatus for recycling fly ash has a quantum energy generator therein. The apparatus recycles fly ash generated as the combustion waste from the burning of coal in thermal power plants, into construction materials such as cement substitutes, environment-friendly cover materials, etc. Unburned pulverized coal is removed while generating carbon monoxide (CO) or carbon dioxide (CO.sub.2) through a combustion reaction, in which the unburned pulverized coal of the fly ash contacts the thermal electrons discharged during a thermal decomposition process at a high temperature, the negative electrodes of the thermal decomposition part, which are heated at a high temperature of 500 C., which is an ignition point of the unburned pulverized coal, or higher, and a high-voltage discharge electrode of an electrochemical reaction part, then heated at 500 C. or higher, and then naturally burned under an oxygen atmosphere (oxygen or ionized oxygen ions in air contained in the fly ash).

This application describes method and systems for recovering metals from metal-containing material. Some embodiments of the disclosed method include one or more of the following three steps: (1) sizing, (2) separating using the helix separator, and (3) collecting. A system can execute these steps.

This application describes method and systems for recovering metals from metal-containing material. Some embodiments of the disclosed method include one or more of the following three steps: (1) sizing, (2) separating using the helix separator, and (3) collecting. A system can execute these steps.

A cyclonic separation and materials processing method and system is presented in which materials entry at one end and which is arranged so that the materials that enter will be given a tangential velocity component as they enter. Specific embodiments include a three-dimensional sorting system with the use of an outward centrifugal motion and up/down (or vertical) motion flow of water or other media, which can be thought of as a three-dimensional separation.

A cyclonic separation and materials processing method and system is presented in which materials entry at one end and which is arranged so that the materials that enter will be given a tangential velocity component as they enter. Specific embodiments include a three-dimensional sorting system with the use of an outward centrifugal motion and up/down (or vertical) motion flow of water or other media, which can be thought of as a three-dimensional separation.

One or more techniques and/or systems are disclosed for producing beneficial re-use sand from foundry sand. Foundry sand can be collected from a mold making operation, and/or from the casting removal and cleaning process. The collected sand product can be cleaned and separated into a clay and carbon mixture, and a beneficial re-use sand. The collected sand product can be cleaned by mixing with water, and subjecting the resulting mix to a hydrocyclone at appropriate flow rates. The hydrocyclone can separate the mix into a carbon, clay and water mix for re-use, and a wet sand mix. Water can be separated from the wet sand and reused, and the resulting sand can be used as beneficial re-use sand.