Korea Institute of Geoscience and Mineral Resources | Date: 2017-01-11
The present invention relates to a method for leaching precious metals contained in a waste denitrification catalyst by using a pressure leaching process, and more specifically, to a method for leaching precious metals contained in a waste denitrification catalyst by using a pressure leaching process, the method comprising the steps of: forming a mixture by mixing a waste denitrification catalyst with a sodium salt solution; and leaching vanadium and tungsten contained in the mixture by feeding the mixture into a sealed pressurized reactor, and then heating and stirring the mixture.
Korea Institute of Geoscience and Mineral Resources | Date: 2016-12-19
Provided is a dry separation apparatus including: a main body; a first deck; a plurality of guides; a supply part; an air blow fan; and a vibration part. A dry separation method includes: supplying an object to be separated to a top surface of a first deck provided with a plurality of punches; sending, by an air blow fan, air to the punches (first punches); and horizontally vibrating, by a vibration part, the first deck so as to discharge particles which have different specific gravities of the object to be separated and a moveable force exerted by air passing the first punches through different passages.
Korea Institute of Geoscience and Mineral Resources | Date: 2016-04-13
Provided is a recovery method of useful resources in seawater and brine, and more particularly, a recovery method of useful resources in seawater and brine capable of improving adsorption efficiency and recovery efficiency of trace amounts of useful resources such as strontium, lithium, boron, or the like, present in brine at low cost by using a magnetic adsorbent composite and a solid-liquid separation process which uses magnetic force.
Korea Institute of Geoscience and Mineral Resources | Date: 2016-08-30
Disclosed herein is a method generating secondary data in geostatistics using observed data. The method for generating secondary data in geostatistics using observed data includes receiving prepared spatial correlation data, primary data, and observed data; generating initial models by performing a geostatistical technique using the spatial correlation data and the primary data; extracting a best representative model using the observed data from the initial models; and creating final models by converging candidate models. The method is advantageous in that initial models are created using geostatistics from the spatial correlation data and primary data, representative models are determined using a distance-based clustering method, the best representative model is selected using the observed data, the candidate models near the best representative model are selected as final models depending on a convergence determination criterion, and uncertainty quantification and prediction of future performances may be conducted using the final models.
Korea Institute of Geoscience and Mineral Resources | Date: 2016-03-18
The present disclosure relates to a system for recovering multiple kinds of ions, which includes: an ion adsorption tank that includes a plurality of adsorption channels arranged in parallel and including a first electrode unit electrically adsorbing only negative ions and a second electrode unit having an adsorbent layer for adsorbing positive ions to be recovered from positive ions, in which electricity is independently supplied to the adsorption channels; a water tank that keeps liquid discharged from the ion adsorption tank; a pump that circulates mother liquor or liquid stored in the water tank; and an ion recovering tank that keeps liquid containing positive ions to be recovered. According to the present disclosure, a series of processes make it possible to continuously recover ions to be recovered, so the operation efficiency of the system can be maximized.
Korea Institute of Geoscience and Mineral Resources | Date: 2017-04-26
Disclosed herein is a monitoring probe for observing groundwater, which is put into an observation well for observing the groundwater to indicate a position of a fresh water-salt water interface of the groundwater. According to the present invention, both ends of a probe body are separated from an inner circumference of an observation well by a catch preventing portion having a convex curved portion or a dumbbell-shaped portion, so that the probe body can be smoothly moved up and down without being caught by a ground-water inlet port of the observation well, thus providing an exact position of a fresh water-salt water interface.
Korea Institute of Geoscience and Mineral Resources | Date: 2016-03-25
Disclosed is an inline separator for separating well fluid or gas-dominant fluid using centrifugal force. The inline separator includes: an outer pipe provided with an inlet; a vortex-generating rotor installed in the outer pipe; a fixed extraction pipe having an external diameter smaller than an internal diameter of the outer pipe and installed in the outer pipe at a downstream side of the vortex-generating rotor; a movable extraction pipe connected to an end of the fixed extraction pipe, close to the vortex-generating rotor, and having an extendable and retractable structure such that a position of an introduction hole of the movable extraction pipe is changeable; a pressure compensation pipe that applies pressure to oil or gas separated in a downstream end of the fixed extraction pipe; and a seawater discharge pipe connected to a portion of the outer pipe at which the fixed extraction pipe is disposed.
Korea Institute of Geoscience and Mineral Resources | Date: 2016-01-12
Provided is a method of restoring arsenic-contaminated soil. In the present invention, arsenic may be easily separated from soil particles by washing the arsenic-contaminated soil by using a basic solution and simultaneously irradiating the soil with ultrasonic waves. Also, since iron oxide and manganese oxide are exposed to the basic solution by dissolving a portion of the surface of a silicate mineral using the basic solution, a residual form of arsenic may be removed.
GeoView Co., Korea Institute of Geoscience and Mineral Resources | Date: 2016-07-29
The present invention relates to a 3D seismic marine survey apparatus. More particularly, it relates to a foldable-fixing type 3D seismic survey apparatus for a small ship and a method of 3D seismic survey using the foldable-fixing type 3D seismic survey apparatus. The foldable-fixing type 3D seismic survey apparatus for a small ship includes: a seismic wave generator; and a seismic unit that includes a plurality of floating board units, and foldable fixing-frames connecting and fixing the floating board units to each other in a floating board array such that relative positions of the floating board units are fixed, and being folded for transporting and unfolded for installing, in which the seismic unit receives 3D seismic waves while being towed behind the seismic wave generator after being moved and unfolded at a survey location.
Korea Institute of Geoscience and Mineral Resources | Date: 2016-02-05
An electric field sensor for underwater, including a sensing unit that senses a change in an electric field and transfers a sensing signal of the electric field to a signal line, a waterproof sealing unit that keeps a signal transferring portion of the sensing unit in a waterproof state, and a water-passing protection unit that shields and protects an exposed portion of the sensing unit. The sensing unit includes a nonconductive hollow pipe connected to the signal line, a sheet of carbon fiber that is wound around the outer surface of the hollow pipe and that senses an electric field, and a terminal ring that is electrically conductively installed at an end portion of the sheet of carbon fiber to provide a connection portion of the signal line and that is watertightly sealed by the waterproof sealing unit.