To provide an apparatus for reclaiming foundry sand and a method for reclaiming foundry sand that can effectively remove binders and so on that attach to returned foundry sand that has been used. Foundry sand that has been used is supplied from a chute for feeding sand 14A to a rotor 16. The rotor 16 is rotated by a driver 20 so that frictional force is generated on the sand in the rotor 16. Then, the sand in the rotor 16 is dropped into the container for washing with water 30 that is located below the rotor 16. In the container for washing with water 30, an agitator 34 is rotated by the driver 20 so that the sand in the container for washing with water 30 is agitated and washed with water.

A method includes measuring a water content and a magnetized matter content of molding sand discharged from green sand casting equipment; comparing the measured water content with a first control value, and if the water content exceeds the first control value, drying the molding sand until the water content becomes equal to or less than the first control value; comparing the measured magnetized matter content with a second control value, and if the magnetized matter content exceeds the second control value, magnetically separating the molding sand until the magnetized matter content becomes equal to or less than the second control value; thereafter, reclaiming the molding sand by dry mechanical reclamation until a loss-on-ignition becomes equal to or less than a third control value; and classifying the molding sand until a total clay content becomes equal to or less than a fourth control value.

The present invention concerns a casting sand cooler comprising a sand chamber having an air inlet optionally with a fan for the feed of air into the sand chamber and an air outlet optionally with a fan for sucking air out of the sand chamber. To provide an improved casting sand cooler in which the sand discharge during the cooling operation by way of the air outlet is markedly reduced, it is proposed according to the invention that a dynamic wind sifter which is rotatable about an axis and which is so arranged that substantially the complete air flow leaving the sand chamber through the air outlet is passed through the dynamic wind sifter.

A method for a reclamation of waste sand comprising bentonite binder, in which method it is subjected a thermal treatment to the waste sand for removing carbon and absorbed moisture from the bentonite binder in the waste sand, it is subjected a mechanical treatment to the thermally treated waste sand for mechanically separating the sand from the bentonite binder, and it is subjected a cooling effect to the sand separated from the bentonite binder. Additionally, it is introduced an apparatus for a reclamation of waste sand comprising bentonite binder, sand for a building industry product. a foundry sand, or a power plant boiler sand, and a use of reclaimed sand in a building industry product, in a foundry sand, or in a power plant boiler sand.

A device and process for hot air jet dewaxing and reclaiming wax composition from patter for investment casting shell making. The device includes a hot air supply mechanism, a hot air jet dewaxing mechanism, a liquid wax collection mechanism, a liquid wax reclaiming mechanism, and a bearing platform. A shell for investment casting is installed on the bearing platform. A hot air outlet end of the hot air supply mechanism is in fluid communication with a hot air inlet end of the hot air jet dewaxing mechanism, and an injector connected with hot air outlet end of the hot air jet dewaxing mechanism extends into a cavity of the shell and faces the body of a wax pattern. Liquid wax generated in the cavity of the shell flows under the action of self-gravity into the liquid wax collection mechanism from its liquid wax inlet end.

A device and process for hot air jet dewaxing and reclaiming wax composition from patter for investment casting shell making. The device includes a hot air supply mechanism, a hot air jet dewaxing mechanism, a liquid wax collection mechanism, a liquid wax reclaiming mechanism, and a bearing platform. A shell for investment casting is installed on the bearing platform. A hot air outlet end of the hot air supply mechanism is in fluid communication with a hot air inlet end of the hot air jet dewaxing mechanism, and an injector connected with hot air outlet end of the hot air jet dewaxing mechanism extends into a cavity of the shell and faces the body of a wax pattern. Liquid wax generated in the cavity of the shell flows under the action of self-gravity into the liquid wax collection mechanism from its liquid wax inlet end.

A method of extracting chemical substances from used molding sand includes: preparing a mixture of used molding sand and liquid, wherein the used molding sand includes a sand material and at least one chemical substance; and cleaning the mixture via an ultrasonic cleaning process to separate and extract the at least one chemical substance from the sand material.

Both a hydraulic (wet) separation process and a dry separation process are used in combination to recover sand, bentonite clay and organics from foundry waste created during operation of a green sand foundry. These recovered ingredients are then recycled for reuse in making additional green sand molds.

A system for processing a sand product includes a process tank having a first compartment, a second compartment in fluid communication with the first compartment, and a third compartment that is isolated from the first compartment and the second compartment. The system also includes a first hydrocyclone configured to receive a sand mixture comprising the sand product and water from the first compartment, and separate the sand mixture into wet sand and a clay mixture. The second compartment is configured to receive the wet sand and clay mixture from the first hydrocyclone. The system also includes a second hydrocyclone configured to receive the wet sand and the clay mixture from the second compartment, and further separate the wet sand from the clay mixture to produce a clay product that can include a fully hydrated clay material. The third compartment is configured to receive the clay product from the second hydrocyclone.

To provide a reclamation method of foundry sand capable of suppressing deterioration in strength of core after remanufacturing. A reclamation method of foundry sand includes: a preparation step for preparing foundry sand to which a binder is adhered; a washing step for washing the foundry sand prepared in the preparation step; a polishing step for polishing the foundry sand washed in the washing step; and rinsing step for rinsing the foundry sand polished in the polishing step.