摘要:
A material conveyor apparatus is described comprising a conveyer device having a material receiving end suitable for receiving material such as overburden or mineral at a working site, a material discharge end distal of the material receiving end, and a material transport system disposed between the material receiving end and the discharge end so as in use to cause material received at the material receiving end to be conveyed to the material discharge end; an scanning system comprising a scanning device disposed to scan the material being conveyed to the material discharge end and obtain a response from the material from which the material may be classified at least into two classes comprising at least a waste class and a useable ore class based on the response; a chassis supporting the conveyor device and the scanning device; a transport carriage supporting the chassis and adapted to cause the chassis to be movable across a surface for deployment in use.
摘要:
An apparatus and a method for sorting, particularly chopped, aluminum scrap by alloy groups are disclosed, in which the aluminum scrap is separated into fractions, fractions of the aluminum scrap are irradiated by at least one neutron source, the gamma radiation that the individual fraction emits due to this neutron irradiation is detected by at least one detector, and based on this, an energy spectrum associated with the respective fraction is generated, based on which energy spectrum a relative ratio of the weight proportions of at least two alloy elements of this fraction is determined, and based on this relative ratio, this fraction is allocated to its corresponding alloy group, and then the fractions are sorted by the alloy groups to which they have been allocated.
摘要:
A laser-based mono-energetic gamma-ray source is used to provide non-destructive and non-intrusive, quantitative determination of the absolute amount of a specific isotope contained within pipe as part of a moving fluid or quasi-fluid material stream.
摘要:
The invention relates to the area of mineral processing, and more particularly to separation of crushed mined material containing minerals, which are luminescent under the action of exciting radiation, into products to be concentrated and tailing products. The invention can be implemented both in X-ray-luminescent sorters at all benefication stages and in product inspection devices, like diamondiferous raw materials testing.The method of X-ray-luminescent separation of minerals consists of transportation of the flow of material being separated, irradiation of this material by periodic sequence of exciting radiation pulses within the specified section of the material free falling trajectory, registration of intensity of the mineral luminescence signal during each sequence period, real-time processing, in accordance with the specified conditions for each of the kinetic components of the registered signal, in order to determine the separation parameters, comparison of the parameters obtained to the specified threshold values, and separation of the mineral to be concentrated from the flow of material being transported according to the results of comparison.The X-ray-luminescent sorter being proposed for implementation of this method includes a means for transportation of the material being separated, a source of pulsed exciting X-ray radiation located above the surface of material being transported and capable of its irradiation in the section of the material free falling trajectory near the place of material descent from the means of transportation, a photo receiving device for luminescence registration located on the same side as the pulsed exciting X-ray radiation source in respect to the irradiated surface of the material being transported, with the possibility of combination of the area of registration of luminescence of the material being transported in the section of its free falling trajectory coinciding with the irradiation area, a unit for setting the threshold values of the luminescence signal intensity and threshold values of separation parameters, a synchronization unit, a digital luminescence signal processing unit provided by functions for determination of separation parameters, comparison of the parameter values obtained to the corresponding specified threshold values and generation of a command to be issued to the actuator, an actuator and receivers for the concentrated and tailing products.In order to achieve the technical result, the following elements have been additionally introduced into the sorter: a source of exciting X-ray radiation located above the surface of material being transported so as to ensure its irradiation in the section before the material descent from the means of transportation, and a photo receiving device provided with a means for filtration of the spectral range of the maximum intensity of luminescence of the mineral to be concentrated and located on the side opposite to the exciting X-ray radiation sources in respect of the trajectory of motion of the material being separated, with the possibility of restriction of its field of vision to the irradiated section of the material free falling trajectory so that the distance from the centre of the receiving window of the photo receiving device to the middle of the irradiated section of the material free falling trajectory should meet the following relation: h=L/2*tg β/2 where L is the largest linear dimension of the irradiated section of the material free falling trajectory; β is the aperture of the photo receiving device; and the digital luminescence signal processing device is capable of simultaneous real-time processing of luminescence signals from two photo receiving devices and is additionally provided with functions for determination, as the separation parameters, of the value of ratio of the slow component of the luminescence signal registered on the irradiated side of the material flow to the value of the slow component of the luminescence signal registered on the flow side opposite to irradiation, and the value of ratio of the fast component of the luminescence signal registered on the irradiated side of material flow to the value of the fast component of the luminescence signal registered on the flow side opposite to irradiation.
摘要:
A system and process for classifying a piece of material of unknown composition at high speeds, where the system connected to a power supply. The piece is irradiated with first x-rays from an x-ray source, causing the piece to fluoresce x-rays. The fluoresced x-rays are detected with an x-ray detector, and the piece of material is classified from the detected fluoresced x-rays. Detecting and classifying may be cumulatively performed in less than one second. An x-ray fluorescence spectrum of the piece of material may be determined from the detected fluoresced x-rays, and the detection of the fluoresced x-rays may be conditioned such that accurate determination of the x-ray fluorescence spectrum is not significantly compromised, slowed or complicated by extraneous x-rays. The piece of material may be classified by recognizing the spectral pattern of the determined x-ray fluorescence spectrum. The piece of material may be flattened prior to irradiation and detection. The x-ray source may irradiate the first x-rays at a high intensity, and the x-ray source may be an x-ray tube.
摘要:
A system and process for classifying a piece of material of unknown composition at high speeds, where the system connected to a power supply. The piece is irradiated with first x-rays from an x-ray source, causing the piece to fluoresce x-rays. The fluoresced x-rays are detected with an x-ray detector, and the piece of material is classified from the detected fluoresced x-rays. Detecting and classifying may be cumulatively performed in less than one second. An x-ray fluorescence spectrum of the piece of material may be determined from the detected fluoresced x-rays, and the detection of the fluoresced x-rays may be conditioned such that accurate determination of the x-ray fluorescence spectrum is not significantly compromised, slowed or complicated by extraneous x-rays. The piece of material may be classified by recognizing the spectral pattern of the determined x-ray fluorescence spectrum. The piece of material may be flattened prior to irradiation and detection. The x-ray source may irradiate the first x-rays at a high intensity, and the x-ray source may be an x-ray tube.
摘要:
A process for treating radioactive contaminated soils to remove radioactive metal oxide contaminants therefrom comprises creating a suspension of particles of the soil in a column of water, alternately forcing fresh water in the column upwardly to force ligher soil particles upwardly in the column and allowing heavier particles to gravitationally settle in the bottom of the water column. The heavy particles comprising radioactive metal oxides are collected and handled for radioactive waste material storage. The aqueous slurry of lighter soil particles is directed to a separator for removing substantial amounts of water after which the particles are directed to a conveyor and spread out to a substantially uniform thickness and detected for any radioactivity. Portions of material in which radioactive particles are detected ar diverted and the uncontaminated soil material is recovered.
摘要:
An apparatus for ore sorting includes a neutron irradiator (12), and a detector assembly (14) for detecting gamma radiation emitted by irradiated lumps (21) of the ore. The irradiated lumps (21) after discharge from the irradiator (12), are divided into two channels (30) by at least one bifurcating device (28) held above a relatively high speed conveyor (26) transporting the lumps (21). Each channel (30) is subsequently divided into three streams (37, 38, 39) by diverting selected lumps (21) from the channel (30) as the lumps (21) are projected from the end of the high speed conveyor (26). The diverted lumps (21) in each stream (37, 38, 39) are allowed to fall on to a relatively low speed conveyor (50) which then presents the lumps (21) to the detector assembly (14).
摘要:
This invention relates to a method for examining dry material, components of which may have a low level of radioactivity, to sort the radioactive components from the nonradioactive components.
摘要:
A method of eliminating errors in the radiation count of a scintillation detector in radiometric sorting caused by one or more adjacent particles. The spacing between the adjacent particles are determined, and statistically determined calibration factors are applied to the count to compensate for the adjacent particles. The calibration factors are dependent upon the spacings, the counts associated with the adjacent particles, and optionally on the shape, volume, mass and height of the adjacent particles.