37 results about "Mineral dust" patented technology

The invention relates to the field of mineral dust treatment, and particularly provides a dust suppressant and a preparation method and application thereof. The dust suppressant is composed of the following components in parts by mass: 60 to 62 parts of vegetable gum, 24 to 28 parts of a humectant, 8 to 12.5 parts of a wetting agent and 2.5 to 3 parts of a thickening agent. The dust suppressant has the advantages of good dust suppression effect, high dust suppression efficiency, good environmental protection property, easily-degradable raw materials, small secondary pollution, low cost, long moisturizing time and long cured layer preservation time, has the characteristics of multiple dust suppressants, and has good adaptability to the environment of mine tailings ponds.

The invention discloses an environment-friendly type dust capturing agent and a preparation method thereof. The capturing agent is composed of the following compositions in percent by mass: 10-20% of poly(amino acid) or poly(amino acid salt), 10-20% of an amino acid surfactant, 1-5% of an quaternary ammonium salt, and the balance water. The advantages comprise that the dust capturing agent is nontoxic in composition and completely degradable by nature microbes, and does not cause pollution to soil and underground water after being directly discharged. The agent is easy to dissolve in water, and can be directly sprayed for usage by utilizing an original water spraying system of a mine. The dust capturing agent has the dust removing rate on total coal dust up to 95% or more, and has the dust removing rate on respirable dust up to 90% or more. The agent has corrosion-resistant and sterilization effects, and is capable of improving the environment in mine tunnels. The agent has certain gathering and cladding effects on dust, enables mineral dust to form relatively large particles, and is insusceptible to cause secondary dust rising after drying is performed. The agent is capable of improving the downhole operation environment, reducing dust damage and promoting safe production.

The invention provides a selenium-rich growing method employing selenium dust, which is characterized in that: (1) the particle size of selenium is as fine as below 2mm; (2) the selenium dust is treated with the above particle size to pH8.5-9.0; (3) the treated selenium dust is used as base fertilizer according the dosage of 50-100kg/667m2. The invention has the beneficial effects that: the contend of water soluble selenium in the mineral dust can be enhanced to be absorbed by crops with the dosage of only 50-100kg/667m2 to generally increase the selenium contend of crop above the standard of 0.1mg/kg, which greatly improves the utilization ratio of low contend and low quality selenium mineral source.

The invention relates to an enhancing type polyolefin/clay nanocomposite which is prepared from polyolefin and modified clay in a melt blending and aggregation mode. The modified clay is prepared through reaction and pretreatment through a coupling agent containing double bonds; the clay comprises SiO2 and Al2O3, and the clay is aluminosilicate mineral dust with the granularity smaller than 200 meshes and a layered or fibroid structure. According to the enhancing type polyolefin/clay nanocomposite, a reaction with quaternary ammonium salt is not needed, the clay is dispersed in a solvent first and then reacts with the coupling agent containing double bonds, and the modified clay is obtained. The double bonds of the coupling agent are opened in the melt blending process through a reaction blending method and react with polyolefin and derivatives of polyolefin, and strong interaction of chemical bonds between the clay and polyolefin and between the clay and the derivatives of the polyolefin is established. The clay is evenly dispersed in the polymer through the shearing force of a screw, and the thus the mechanical property and the performance on other aspects of the materials are greatly improved.

The invention relates to a no-air-source foam plug dust removing system applied to underground coal mine. The no-air-source foam plug dust removing system mainly consists of components such as a clear water pipeline, a mineral flameproof pressure pump, a proportioning mixer, a foaming agent liquid storage tank, a foaming agent pipeline, a foaming liquid pipeline, a foaming liquid distribution device, a foam maker and a foam nozzle. A current water source in a dust removal site is conveyed to the mineral flameproof pressure pump through a filtering device, clear water is pressured and then enters the proportioning mixer, the proportioning mixer generates negative pressure inside and sucks a foaming agent into the foaming agent pipeline, the clear water fully and uniformly mixed with the foaming agent and then enters the foam maker through the foaming liquid distribution device, the foam maker sucks surrounding air by utilizing the Venturi effect to mix with foaming liquid to form high-quality foam, and the foam is sprayed out through the foam nozzle to form a foam plug with the certain thickness so as to block the propagation of mineral dust; and when the system is in use, the number of the foam nozzles and the thickness of the foam plug are selected according to the requirements of the dust removal site. The no-air-source foam plug dust removing system disclosed by the invention does not need a special compressed air conveyance pipeline and has the advantages of simple structure and convenience in use.

The invention belongs to the technical field of new building materials, and particularly discloses a building paint coating for absorbing formaldehyde. The building paint coating for absorbing the formaldehyde is prepared from 2-3 parts of nanometer titanium dioxide, 2-3 parts of powder quartz, 1-2 parts of dye, 3-4 parts of dispersing agent, 0.8-1.2 parts of antifoaming agent, 70-80 parts of emulsion, 2-3 parts of formaldehyde absorbent, 2-4 parts of diatom ooze powder, 15-20 parts of filler, 0-0.3 part of flatting agent and 1-1.5 parts of mineral dust. By means of the building paint coatingfor absorbing the formaldehyde, aldehyde, benzene, ammonia and other harmful chemicals in indoor air and on building materials can be effectively absorbed and decomposed; under the condition of photocatalysis, the building paint coating has the functions of effectively decomposing other harmful substances in the air and absorbing peculiar smell in the air; the building paint coating is energy-saving, environmentally friendly, resistant to heat and corrosion, and long in service life.

The invention belongs to the technical field of mineral dust removal equipment, and specifically discloses a mineral mist spray dust removal device. The mineral mist spray dust removal device comprises a dust removal machine shell, wherein an atomizing cavity is formed in the interior of the dust removal machine shell; the top of the atomizing cavity is provided with a connecting pipe used for connection; atomizing machines used for adjustment are arranged at two ends of the inner cavity of the atomizing cavity respectively, and a movable plate is arranged at the bottom of the atomizing cavity; two air bags are arranged on two sides of the buffer spring; a fixed plate is arranged below the movable plate, and a rubber plate is arranged below the fixed plate; a mixed flow cavity is formed inthe space between the rubber plate and the fixed plate; two hoses are arranged between the mixed flow cavity and the atomizing cavity; an air outlet plate is installed at the lower end of the rubberplate, and a dust collection net used for dust collection is arranged in the inner cavity of the air outlet plate; and an electric push rod is arranged at the bottom of the fixed plate. According to the mineral mist spray dust removal device, the rubber plate is pushed by the electric push plate, so that water mist inside the mixed flow cavity is compressed and sprayed, and then the dust removal effect of water mist in mineral holes is improved.

The invention discloses a determination method for dust moistening agent performance. The dust is sieved, the mineral dust with the particle diameter less than 180 mesh is obtained; the sieved dust sample is distributed in the moistening agent solution, is made ultrasonic dispersion and still placement; the particle diameter of the dust in the moistening agent suspension is tested, the performance of the dust moistening agent is determined by particle diameter parameters. The invention is suitable for determining the performance of various fine dust moistening agent, the dust characteristics can be referred during the determination, the determination result can more directly reflect the moistening process of the moistening agent to the dust, the different moistening performances of the same moistening agent to the dust with different particle diameters can be synchronously analyzed, the action effect of the moistening agent to the dust with different particle grades can be quantitatively analyzed; the invention has high determination automation degree and broad application range.

The invention relates to an environment-friendly treating device for flue gas from sulfuric acid production. The environment-friendly treating device comprises a ventilating frame, a connecting pipe,a detachable device and anti-blocking sieving holes, wherein the left end of the ventilating frame is communicated with the ventilating frame; the detachable device is arranged at the upper end of theinterior of the ventilating frame; the anti-blocking sieving holes are arranged at the right end of the detachable device. The environment-friendly treating device has the beneficial effects that thedifficulties that filtering holes are easily blocked when mineral dust is removed and the quantity of normal filtering holes is reduced to cause reduction of the filtering efficiency, and after a period of time of working, partial mineral dust is easy to deposit on the surface of a filtering device to cause the increase of bear load on the device and the like can be solved; by expansion of hole diameter and auxiliary downward pushing of a pushing plate, the blocked mineral dust can be dredged and fall down; a filtering net can be detached at any time, so that convenience is brought for timedcleaning and replacement of the filtering net; the anti-blocking sieving holes can be wholly taken by the detachable device at any time, so that cleaning is convenient, the possibility of deposition of a large amount of mineral dust on the detachable device is reduced, and the increase of the bear load on the device can be avoided.

The invention discloses mineral dust treatment, including an air intake fan, an air intake pipe, a gas scrubbing tower, a dust removal board slot, an electrostatic dust removal board, a dust collecting box, a gas scrubbing solution, a tower base, a dust detector, an exhaust fan, The fan bracket, the top cover of the liquid injection port, the liquid injection pipe, the liquid discharge valve and the liquid discharge port, the intake fan is located at the top of the intake pipe, and the bottom end of the intake pipe is connected to the bottom of the gas scrubbing tower. The plate is divided into upper and lower parts, the lower part contains the scrubbing solution, and the upper half of the scrubber tower is equipped with electrostatic dust removal equipment, which includes dust removal board slot, electrostatic dust removal board and dust collection box. The utility model adopts the combination of solution filtration and electrostatic dust removal to treat mineral dust, the noise generated during the treatment is low, and no noise pollution will be caused. The exhaust terminal is provided with a dust detector, which can quantify the treatment effect and prompt the operation. The personnel should replace the scrubbing solution to clean the dust box in time.

The invention is directed towards methods and compositions for treating piles of particulate materials to inhibit and prevent the loss of valuable fuel or mineral dust from being released from storage piles or open containers. The method involves applying separately to the pile two different compositions. When separate the two compositions are low viscosity and easy to spray. When combined the two form a gel coating that is resistant to erosion but is flexible while the pile or payload is still settling, jostling, being bumped, and otherwise moving around.

The invention discloses a preparation method of spherical lead oxide atmospheric mineral dust. The preparation method comprises the following steps: 1, respectively preparing a lead acetate solution,a hexamethylenetetramine solution and a trisodium citrate solution, and 2, mixing the prepared lead acetate solution, hexamethylenetetramine solution and trisodium citrate solution according to a molar ratio of 1: 1: (0.4-0.2), carrying out water bath heating and filtering to obtain spherical lead oxide. Because the mineral dust is an important component of atmospheric dust, and lead oxide in themineral dust has great influence on the atmospheric environment and human health. The spherical lead oxide atmospheric mineral dust prepared by the method disclosed by the invention can well simulatelead oxide mineral dust in real atmosphere, and has great significance for researching the fields of atmospheric environment, human health and the like of the atmospheric mineral dust.

The invention discloses a base used for installation of a mineral dust sampler. The base comprises at least three support rods, a bearing plate and a rotating shaft, wherein one ends of the support rods are movably chained with the lower surface of the bearing plate through a connecting piece, the angles between the adjacent support rods are the same, the length of each support rod is adjustable,the rotating shaft is arranged on the upper surface of the bearing plate and positioned on the axis of the bearing plate, and one end, far away from the bearing plate, of the rotating shaft is provided with a clip. Under the condition of changing acquisition points, a worker can rapidly adjust the vertical direction and the horizontal direction of the mineral dust sampler, the adjustment time is saved, the labor cost is saved, and the work efficiency is increased.

The present invention belongs to the field of devices and methods for measurement of particle concentration, more precisely to the field of devices and methods for quantification of particles based ontheir physical characteristics, especially with the use of optical means. The invention relates to a method for determination of ambient mineral dust concentration based on optical absorption of particles concentrated by a virtual impactor as well as a device performing the said method. The method comprises the following steps: sampling air samples with particle size smaller than 1 mum (PM1) andsampling air samples with particle size up to 10 mum; concentrating the samples with particle sizes up to 10 mum with a virtual impactor; measuring optical absorption of collected samples at least onewavelength from UV to IR spectre, preferably from 370 to 950 nm, most preferably at 370 nm; subtracting the absorption of the samples with particle size smaller than 1 mum from the absorption of thesample concentrated by the virtual impactor.