20 results about "Silica dust" patented technology

The invention relates to the technical field of zero-crystallization silicon quartz stone production, in particular to an artificial environment-friendly zero-crystallization silicon quartz stone forming process and manufacturing equipment thereof. The invention discloses a forming process of artificial environment-friendly zero-crystalline silicon quartz stone. The forming process comprises the following steps: heating silica-containing quartz sand and quartz powder to a molten state (gt); then adding glass sand and glass powder, completely melting the glass sand and the glass powder, conveying the glass sand and the glass powder into a cooling kettle, rapidly cooling the glass sand and the glass powder so as to destroy a crystal structure to generate an amorphous quartz block, grinding the amorphous quartz block into amorphous quartz powder and / or sand by utilizing a grinding kettle, mixing the amorphous quartz powder and / or sand with unsaturated resin, a curing agent, a dispersing agent, a coupling agent and water, pressing and curing to obtain a finished product. The artificial environment-friendly zero-crystal silicon quartz stone is obtained, so that silicosis caused by inhalation of silicon dioxide dust by workers in the processing process of the quartz stone plate is effectively reduced.

The invention relates to the technical field of ventilation, in particular to a mixed ventilation device for construction in a subway tunnel, which comprises a first vertical shaft excavated and constructed on the tunnel, second vertical shafts for air exhaust are constructed on the left side and the right side of the first vertical shaft on the tunnel, and a plurality of axial flow fans are uniformly arranged in the tunnel. A jet fan is arranged in the first vertical shaft, and a negative pressure area is arranged on the lower side of the jet fan in an air inlet mode. The support assembly comprises an inner supporting frame, an outer mounting frame and a fixing frame and is used for fixing the jet fan in the negative pressure area; and the channel assembly communicates with the bottom of the jet fan and is used for increasing the flow speed of the air exhausted outwards from the negative pressure area. According to the tunnel ventilation system, air flow is effectively promoted, the concentration of silica dust, toxic gas, harmful steam and other pollutants in a tunnel can be remarkably reduced, and a healthier working environment is provided for operators by introducing fresh air and discharging vitiated air.

A multi-component inorganic capsule anchoring system can be used for chemically fastening anchors, bolts, screw anchors, screw bolts, and post-installed reinforcing bars in mineral substrates. The multi-component inorganic capsule anchoring system contains a curable powdery ground-granulated blast-furnace slag-based component A, and an initiator component B in aqueous-phase for initiating a curing process. The powdery ground-granulated blast-furnace slag-based component A contains further silica dust. The component B contains an alkali-silicate component and optionally a plasticizer.

The invention belongs to the technical field of pipeline ash removal, and particularly relates to a metal silicon smelting-based smoke dust discharge pipeline ash removal device which comprises a hanging seat, a guide seat is fixedly connected to one end of the hanging seat, a rotating seat is rotatably connected to the position, located above the guide seat, of the exterior of the hanging seat, and three supporting pieces are fixedly connected to the outer surface of the rotating seat; one end of each of the three supporting pieces is fixedly connected with a fixing frame; the scraper can be attached to the dust scraping plate, the dust scraping plate can slide relative to the scraper in a crossed mode in the dust scraping process, and therefore silicon dioxide dust attached to the dust scraping plate can be scraped and cleaned through the scraper, meanwhile, the brush plate can wipe dust of the cleaned dust scraping plate again, and the dust scraping plate is more convenient to use. According to the dust scraping device, the scraping and cleaning effect of the dust scraping plate can be improved, meanwhile, in the process that the dust scraping plate scrapes dust on the inner wall of the pipeline, the scraper can scrape and clean the dust scraping plate intermittently, the situation that the device stops operating for cleaning is avoided, and the dust cleaning efficiency of the pipeline can be improved.

The invention discloses an establishment method of a respirator combined non-exposed type tracheal instillation rat silicosis model. The establishment method comprises the following operation steps: step 1, preprocessing; step 2, trachea intubation; step 3, performing tracheal instillation; step 4, combining breathing machines; 5, observing and recording; and step 6, processing and analyzing. The small animal breathing machine is connected to assist ventilation of the rat after each time of tracheal instillation, silica dust can be effectively diffused to pulmonary alveoli of the rat, the success rate of modeling is guaranteed, the rat can breathe smoothly, and therefore the survival rate of the rat is guaranteed.

The present application relates to the field of ventilation technology, especially to a mixed ventilation device for subway tunnel construction, comprising a first shaft on the tunnel, the left and right sides of the first shaft are provided with a second shaft for exhaust on the tunnel, a plurality of axial flow fans are evenly arranged in the tunnel, a jet fan is arranged in the first shaft, and a negative pressure area is arranged on the lower side of the jet fan; a support assembly comprising an inner support frame, an outer mounting frame and a fixing frame is used to fix the jet fan in the negative pressure area; a channel assembly is in communication with the bottom of the jet fan and is used to accelerate the air flow rate of the negative pressure area. The present application effectively promotes air flow, can significantly reduce the concentration of pollutants such as silica dust, toxic gases and harmful vapors in the tunnel, and provides a healthier working environment for workers by introducing fresh air and discharging dirty air.

A synthetic turf system includes a plurality of synthetic turf fibers, and a plurality of ceramic pellets interspersed among the synthetic turf fibers. The ceramic pellets have a hardness on the Mohs scale of 6 to 8, a density of 0.5 to 2.15 g / cm3, and a sphericity and roundness rating of 0.7 to 0.99. The ceramic pellets include a mixture of alumina fines and at least one of kaolin or bauxite. The ceramic pellets are chemically inert and free from respirable quartz silica dust. The ceramic pellets may include a ceramic pellet core and a coating. The coating may be configured to control thermal properties of the ceramic pellets. The synthetic turf system may include small ceramic pellets configured to remain near a surface and large ceramic pellets configured to settle towards a bottom of the system.

The invention discloses a construction method of an immortalized human alveolar type II epithelial cell silicosis model, and particularly relates to the technical field of medicine. The method comprises the following steps: firstly carrying out silica dust treatment, and then carrying out cell primary treatment and subculture; and finally, carrying out contamination culture by using a SiO2 particle suspension to prepare the biochemical human alveolar type II epithelial cell silicosis model. According to the method, the immortalized human alveolar type II epithelial cells are used as research objects, SiO2 particle suspensions with different concentrations are used for infecting the immortalized human alveolar type II epithelial cells, and the optimal infecting time and infecting concentration are determined by detecting the cell activity; the method for constructing the silicosis model by inducing the immortalized human alveolar type II epithelial cells by using the SiO2 particle suspension in vitro is successfully established.

The invention belongs to the technical field of medical animal model construction, and discloses a coal silicosis mouse model construction method and application. According to the method, a coal-silicon mixed dust suspension containing 15%, 25% and 50% of free silicon dioxide is prepared, and the concentration is 50 mg / ml; the method comprises the following steps: hanging an anesthetized healthy adult (6-8 weeks) C57BL / 6N male mouse on a fixing device, instilling 50 microliters of coal and silicon mixed dust suspension once per week by adopting an oropharynx inhalation method for 4 weeks continuously, and establishing a coal silicosis model; applying equal-volume normal saline to the control group; respectively observing for 28 days, 56 days and 112 days, taking mouse lung tissues for pathological analysis and fibrosis index detection, and evaluating the model preparation effect. The method is simple to operate and low in cost, and the established coal silica dust mouse model is stable, efficient, repeatable and noninvasive.

A system for the production of sustainable concrete using bentonite, silica dust and reduced graphene oxide, comprising: a cement-like binder; fine and coarse aggregates; Bentonite, which is provided as a partial replacement for cement in a range of 0 to 30 wt.%; Silica dust, supplied as an additional cementitious material in a range of 0 to 10 percent by weight; and Reduced graphene oxide, which is included as a nanoscale reinforcing additive in a range of up to 0.05 wt% of the cement, the system produces a dense, durable and high-strength concrete with reduced cement content.

Systems and methods for silica dust reduction at well sites are described herein. The system can include a blower, a transfer hose having a first end connected to the blower, a second end connected to a hopper containing a granular material, and an interior volume. The system can also include a supply of dust suppression solution in fluid communication with the interior volume of the transfer hose.

The utility model relates to the technical field of dust removal towers, and discloses a water film dust removal tower for removing silicon dioxide dust, which comprises a tower body, the top of the tower body is provided with a gas outlet, the outer side wall of the tower body is fixedly connected with a gas inlet, and one side of the gas inlet extending to the tower body is fixedly connected with a gas channel. A gas channel is formed in the tower body, a forced mixing pipe is connected to the lower end of the gas channel, a lower water storage pipe is arranged in the tower body, a settling zone for settling solid waste in gas is arranged at the inner bottom of the tower body, filtering filler is arranged in the tower body, and a water circulating device is arranged on the right side of the tower body. A forced mixing pipe is arranged, a second nozzle is arranged in the forced mixing pipe, and an atomized water film sprayed by the second nozzle can be in full contact with introduced waste gas, so that particulate matters in the waste gas can be settled, and the dust removal efficiency is improved; and the gas can be further filtered.

To provide an auxiliary material for steelmaking capable of easily adjusting the bulk specific gravity, generating little CO2 during use, and contributing to the effective utilization of rock wool waste material.SOLUTION: An auxiliary material for steelmaking comprises 1-95 mass% of rock wool as a main raw material, 1-95% of granules and 1-50% of a binder as auxiliary raw materials. A first form of the auxiliary material comprises granules of at least one of fired ash, fly ash, silica sand and brick waste, and papermaking sludge. A second form of the auxiliary material comprises granules of at least one of calcined ash and silica powder. A third form of the auxiliary material comprises granules of at least one of silica dust, fly ash, silica sand, brick waste, coke, bentonite, glass powder, clay, magnesia, magnesia clinker and magnesia carbon, and papermaking sludge. The binder comprises at least one of vinyl acetate, lignin, molasses, sodium silicate, alpha starch, corn starch, carboxymethyl cellulose, thermosetting resin and thermoplastic resin.SELECTED DRAWING: Figure 1

The invention relates to an optical fiber preform waste gas and waste residue resourceful treatment device and method.The treatment device comprises a sound wave prepolymerization module, a rotational flow phase change separation tower, a depolymerization regenerator and a stepped condensing tower, and the sound wave prepolymerization module, the rotational flow phase change separation tower and the depolymerization regenerator are sequentially communicated through pipelines; and the stepped condensing tower is communicated with the top of the rotational flow phase change separation tower through a pipeline. The device has the beneficial effects that the structure is compact, the design is reasonable, and by pre-agglomeration of silicon dioxide dust, synchronous separation of silicon dioxide dust and hydrogen chloride acid mist, mild solid / gas separation, release of residual hydrogen chloride gas, retention of a dry silicon dioxide layer, graded capture of hydrogen chloride gas, and automatic stripping of nano-scale silicon dioxide, the product quality is improved. Synchronous recycling of dust and waste gas is achieved, waste is turned into wealth, energy conservation and environmental protection are achieved, and the cost is reduced.

A synthetic turf system includes a plurality of synthetic turf fibers and a plurality of ceramic pellets interspersed among the synthetic turf fibers. The ceramic pellets have a hardness on the Mohs scale of 6 to 8, a density of 0.5 to 2.15 g / cm3, and a sphericity and roundness rating of 0.7 to 0.99. The ceramic pellets include a mixture of alumina fines and at least one of kaolin or bauxite. The ceramic pellets are chemically inert and free from respirable quartz silica dust. The ceramic pellets may include a ceramic pellet core and a coating. The coating may be configured to control thermal properties of the ceramic pellets. The synthetic turf system may include small ceramic pellets configured to remain near a surface and large ceramic pellets configured to settle towards a bottom of the system.

The invention discloses an environment-friendly easy-to-process ceramic rock plate with low crystalline silicon dioxide content and a production method thereof.The ceramic rock plate comprises a green body layer and a decorative layer arranged on the upper surface of the green body layer, and the green body layer comprises, by weight, 58%-65% of SiO2 (T), 22%-28.5% of Al2O3, 30%-3% of Fe2O3, 0.5%-7% of CaO, 0.5%-5% of MgO, 1.5%-5% of K2O, 0.35%-3% of Na2O and the balance impurities; and the content of crystalline silicon dioxide SiO2 (Cp) in the phase composition of the green body layer is less than or equal to 10% in percentage by weight. The production method comprises the following steps: S1, preparing ceramic rock plate blank slurry; s2, preparing ceramic rock plate blank powder; s3, ceramic rock plate blank preparation; S4, ceramic rock plate blank decoration; S5, ceramic rock plate blank firing; and S6, ceramic rock plate semi-finished product post-processing treatment. The produced ceramic rock plate product has the characteristics of low crystal silicon dioxide content, good toughness and high strength, so that the processability is good, and few crystal silicon dioxide dust is generated in the processing process.

The utility model discloses a crushing and screening device for preparing silicon powder, which comprises a box body, a crushing roller, a multi-stage screening device, spiral lifting devices and a material conveying device, the crushing roller is arranged above the inner side of the box body, the multi-stage screening device is arranged below the crushing device, and the spiral lifting devices are respectively arranged on the left side and the right side of the box body. The material conveying device is arranged below the box body; a spraying device a with dustproof and recycling functions is arranged above the box body; the multi-stage screening device further comprises a screening plate and a vibrating mechanism. A spraying device b with a cleaning function is arranged above the spiral lifting device; the material conveying device further comprises a conveying box, an induced draft fan and a sedimentation tank. The device has the functions that dust pollution in the crushing process can be reduced, and silicon dust in the crushing process can be recycled; a screening structure is added, and screening efficiency is improved; and accumulated dust in the vertical lifting mechanism is cleaned and lifted in time and is recycled.

This utility model relates to a wire drawing equipment and a rod feeding device for preventing silica dust accumulation, aiming to solve the technical problem that silica dust easily accumulates on the rod feeding mechanism and positioning mechanism, thus affecting product quality and equipment life. The rod feeding mechanism is mounted on the frame and is used to convey at least one row of quartz rods forward; the positioning mechanism is mounted on the frame and is used to position each quartz rod so that it passes through the set area of ​​the corresponding flame nozzle of the melting burner; a protective cover is used to cover the rod feeding mechanism and the positioning mechanism in front of the melting burner. The protective cover includes a front plate for feeding and a rear plate for discharging. The front and rear plates are respectively provided with clearance holes for the quartz rods to pass through, and a sealing plate is provided between the front and rear plates.

The utility model discloses a feeding and dust collecting device for silicon material screening, and relates to the technical field of silicon material treatment equipment. Comprising a screening machine, a magnetic separator, a corrugated pipe, a dust removal pipeline, a dust collection tank, partition plates and an air outlet pipeline. A screening machine is arranged in the direction of a discharge hole of the magnetic separator; the screening machine is connected with a feed port and a discharge port of the magnetic separator and one end of a corrugated pipe; the other end of the corrugated pipe is connected into a dust removal pipeline; the two groups of dust removal pipelines are communicated with the dust collection tank; two partition plates are arranged in the dust collection tank; the top of the dust collection tank is communicated with the air outlet pipeline; air inlets of the dust collection tank correspond to the spaces on the two sides respectively; a communication port of the air outlet pipeline and the dust collection tank is positioned in the middle space; the device can cover a dust collection position, avoid dissipation of silicon dust and improve the dust collection effect, meanwhile, the silicon dust of standby screening equipment and original equipment is preliminarily recycled in a unified mode, part of large-particle silicon materials are intercepted in the recycling process, and silicon material waste is reduced.

A synthetic turf system includes a plurality of synthetic turf fibers and a plurality of ceramic pellets interspersed among the synthetic turf fibers. The ceramic pellets have a hardness on the Mohs scale of 6 to 8, a density of 0.5 to 2.15 g / cm3, and a sphericity and roundness rating of 0.7 to 0.99. The ceramic pellets include a mixture of alumina fines and at least one of kaolin or bauxite. The ceramic pellets are chemically inert and free from respirable quartz silica dust. The ceramic pellets may include a ceramic pellet core and a coating. The coating may be configured to control thermal properties of the ceramic pellets. The synthetic turf system may include small ceramic pellets configured to remain near a surface and large ceramic pellets configured to settle towards a bottom of the system.