Aggregate processing systems, methods, and apparatus are described. In some embodiments, a plant is configurable in one of a plurality of configurations.

Aggregate processing systems, methods, and apparatus are described. In some embodiments, a plant is configurable in one of a plurality of configurations.

A spiral chute for mineral processing, comprising a spiral chute body (10) supported to be vertical. A radial cross-sectional profile curve of the chute body gradually rises from the inside of the chute body to the outside of the chute body. The radial cross-sectional profile curve of the chute body is a compound curve (100). The compound curve comprises a first curve segment (110) and a second curve segment (120) sequentially arranged from the inside of the chute body to the outside of the chute body. The tail end of the first curve segment and the head end of the second curve segment are connected to a first connection point (130). The included angle between the curve tangent of the head end of the second curve segment and the horizontal plane is smaller than that between the curve tangent of the tail end of the first curve segment and the horizontal plane. The spiral chute for mineral processing can not only outwardly expand and thin a high dune wall to improve the looseness of mineral particles, but also increase the handling capacity per hour, so that the mineral processing efficiency and effect are better.

A spiral chute for mineral processing, comprising a spiral chute body (10) supported to be vertical. A radial cross-sectional profile curve of the chute body gradually rises from the inside of the chute body to the outside of the chute body. The radial cross-sectional profile curve of the chute body is a compound curve (100). The compound curve comprises a first curve segment (110) and a second curve segment (120) sequentially arranged from the inside of the chute body to the outside of the chute body. The tail end of the first curve segment and the head end of the second curve segment are connected to a first connection point (130). The included angle between the curve tangent of the head end of the second curve segment and the horizontal plane is smaller than that between the curve tangent of the tail end of the first curve segment and the horizontal plane. The spiral chute for mineral processing can not only outwardly expand and thin a high dune wall to improve the looseness of mineral particles, but also increase the handling capacity per hour, so that the mineral processing efficiency and effect are better.

The present invention discloses a method for preparing iron ore concentrates by recycling copper smelting slag tailings, and belongs to the technical field of metallurgy and tailings recycling. In the present invention, copper slag tailings obtained after copper pyrometallurgy and flotation and water are used as raw materials, and low-concentration sulfur dioxide flue gas is used as a leaching agent for leaching of metals such as iron, zinc, copper, arsenic, and silicon in the slag tailings; the leachate is purified step by step through processes such as replacement by metal iron powder and sulfide precipitation control, to separate zinc, copper, arsenic, etc.; a purified solution is mainly composed of FeSO.sub.4 or can be used for producing a ferric salt flocculant; obtained tailings are used to obtain iron ore concentrates through magnetic separation, and the obtained iron ore concentrates can be used for further producing ultra-pure iron ore concentrates.

The present invention discloses a method for preparing iron ore concentrates by recycling copper smelting slag tailings, and belongs to the technical field of metallurgy and tailings recycling. In the present invention, copper slag tailings obtained after copper pyrometallurgy and flotation and water are used as raw materials, and low-concentration sulfur dioxide flue gas is used as a leaching agent for leaching of metals such as iron, zinc, copper, arsenic, and silicon in the slag tailings; the leachate is purified step by step through processes such as replacement by metal iron powder and sulfide precipitation control, to separate zinc, copper, arsenic, etc.; a purified solution is mainly composed of FeSO.sub.4 or can be used for producing a ferric salt flocculant; obtained tailings are used to obtain iron ore concentrates through magnetic separation, and the obtained iron ore concentrates can be used for further producing ultra-pure iron ore concentrates.

Upgraded coal, method of forming the same, and graphene films and quantum dots made therefrom. A method of upgrading coal includes cleaning coal to form a cleaned coal residue. The method also includes (A) reacting the cleaned coal residue with an oxidizable inorganic metallic agent, or (B) reacting the cleaned coal residue with a reducing agent, or a combination thereof, to form the upgraded coal.

Upgraded coal, method of forming the same, and graphene films and quantum dots made therefrom. A method of upgrading coal includes cleaning coal to form a cleaned coal residue. The method also includes (A) reacting the cleaned coal residue with an oxidizable inorganic metallic agent, or (B) reacting the cleaned coal residue with a reducing agent, or a combination thereof, to form the upgraded coal.

A system and method directed to the economical recovery of valuable iron constituents from iron blast furnace and steel-making slag fines wherein the slag is obtained and subjected to a series of classification steps which progressively sort the slag fines by various physical characteristics, including magnetism, size, and density, into relatively iron-rich and relatively iron-poor classifications, resulting in the isolation of iron-rich commercial byproduct at one or more of the classification steps.

A system and method directed to the economical recovery of valuable iron constituents from iron blast furnace and steel-making slag fines wherein the slag is obtained and subjected to a series of classification steps which progressively sort the slag fines by various physical characteristics, including magnetism, size, and density, into relatively iron-rich and relatively iron-poor classifications, resulting in the isolation of iron-rich commercial byproduct at one or more of the classification steps.