12 results about "Silica dust" patented technology

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 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 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 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 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.

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.