Abstract:
Plant for the recovery of spent refractory material in steel plants, comprising at least one receiving area (1) for said refractory material, at least one material sieving area (2), at least one magnetic separation area (3) and at least one sorting area (4).Said receiving area (1) communicates with a first sieving area (2) comprising first sieving means intended to divide said refractory material in at least two fractions, of which a coarse fraction and a fine fraction, on the basis of the size of said material.There is further provided a second sieving area (21) comprising second sieving means intended to divide said fine fraction into at least two further sub-fractions (A, B, C) on the basis of size.
Abstract:
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.
Abstract:
One method of treating incinerated waste comprises: size separating at least some of the incinerated waste into a first undersize fraction comprising particles smaller than the first separation size and into a first oversize fraction comprising particles larger than the first separation size; size reducing at least some of the first oversize fraction; size separating at least some of the size-reduced first oversize fraction into a second undersize fraction comprising particles smaller than the second separation size and into a second oversize fraction comprising particles larger than the second separation size; combining at least some of the first undersize fraction and at least some of the second undersize fraction into a fine fraction; and extracting metal from at least some of the fine fraction. Another method of treating incinerated waste comprises extracting metal by froth flotation from at least some of the incinerated waste. Systems are also disclosed.
Abstract:
The invention relates to a method for processing waste incineration ashes (A), in particular domestic waste incineration ashes (HMVA), in which the ashes are classified into a plurality of fractions of different grain size distributions in a processing plant (11) separated from the actual waste incineration process. The ashes (A) are classified exclusively using a wet classification process in the processing plant (11), only wet classification processes that are gentle to the grains being used, and the wet classification process is performed in such a way that all of the ashes (A) are classified into at least one fine fraction (I) loaded with harmful substances and at least one coarse fraction (II, III) that contains only a small amount of harmful substances or no harmful substances at all.
Abstract:
One method of treating incinerated waste comprises: size separating at least some of the incinerated waste into a first undersize fraction comprising particles smaller than the first separation size and into a first oversize fraction comprising particles larger than the first separation size; size reducing at least some of the first oversize fraction; size separating at least some of the size-reduced first oversize fraction into a second undersize fraction comprising particles smaller than the second separation size and into a second oversize fraction comprising particles larger than the second separation size; combining at least some of the first undersize fraction and at least some of the second undersize fraction into a fine fraction; and extracting metal from at least some of the fine fraction. Another method of treating incinerated waste comprises extracting metal by froth flotation from at least some of the incinerated waste. Systems are also disclosed.
Abstract:
The invention relates to a method for processing waste incineration ashes (A), in particular domestic waste incineration ashes (HMVA), in which the ashes are classified into a plurality of fractions of different grain size distributions in a processing plant (11) separated from the actual waste incineration process. The ashes (A) are classified exclusively using a wet classification process in the processing plant (11), only wet classification processes that are gentle to the grains being used, and the wet classification process is performed in such a way that all of the ashes (A) are classified into at least one fine fraction (I) loaded with harmful substances and at least one coarse fraction (II, III) that contains only a small amount of harmful substances or no harmful substances at all.
Abstract:
The present invention provides a control method for superfine powder grinding industrial waste slag in an energy-saving and environmental-friendly type of closed cycle with high yield and the apparatus for the same. The method combines a drying process and a powder grinding process, adopts an in-line monitoring process, automatically adjusts and controls the operating parameters. Therefore, the invention changes the conventional open cycle into a closed cycle, shortens the cycle, achieves the automatic control and adjustment of the operating parameters, and obtains the superfine product with high yield. So the invention enhances the application value of industrial waste slag, extends the applicable field of industrial waste slag, and increases the extra value of final product. The apparatus primarily adds a wind sweeping drying grinder, an in-line laser particle detector, and an automatic control device, furthermore selects a screener and a deduster with high efficiency and product quality and therefore needs less space, investment and energy consumption, improves the work efficiency, the quality of the product and overall efficiency. The apparatus can automatically adjust and control the operating parameters, improve the physical and chemical characteristics of industrial waste slag, and change the industrial waste slag to industrial additive or admixture with good performance; therefore it has good economic and social benefit.
Abstract:
The present invention provides a method of beneficiating slag, including mixing the slag with water to form a slurry. The slurry is screened through a first screen to remove a first portion of material and then screened through a second screen to remove a second portion of material. In one embodiment, the second portion of material has a carbon content less than about 5% and, more preferably, a carbon content less than about 1%.
Abstract:
This invention relates to a process and system for treating ultra fine powder steel slag, which comprises: collecting the steel slag into a tank and carrying the tank onto a tipping device by a hoisting equipment; operating the tipping device to transport the steel slag to a granulating device and granulating the steel slag in the granulating device to form granulated slag; transporting the granulated slag into a drying room with a conveyor, wherein the granulated slag is continuously dried in the drying room at a temperature between 200-300° C. for 30-60 second using exhaust heat from a converter; and transporting dried granulated slag, with the conveyor, to a magnetic separation device to separate carbon metal grains from nonmetal grains contained in the granulated slag.
Abstract:
In order to make it possible for an inhomogeneous residue generated in a pyrolysis plant to be separated continuously and in as fully graded a way as possible, specially selected components are combined with one anther in an advantageous configuration. An essential element of the plant is the separation of a coarse residue in a coarse screen and the subsequent separation of the remaining residue in a zigzag separator into a light residue and a heavy residue. By use of the plant, in particular, the carbon-containing constituents are separated from the remaining residue. The individual components are mostly configured to be self-cleaning for fault-free operation.