6 results about "Asbestos fiber" patented technology

The invention relates to a method for processing a solid material comprising asbestos fibres, comprising the following steps: - grinding the solid material, - bringing the solid material into contact with an aqueous acid solution, resulting in at least some of the asbestos fibres being dissolved, - separating the liquid (5) and solid (4) fractions of the products resulting from the dissolving process. This method is characterised in that it further comprises the following steps: - diffusion dialysis of the liquid fraction (5) in order to produce a regenerated aqueous acid solution (9), - using the regenerated aqueous acid solution (9) in the step of bringing the ground solid material into contact with an aqueous acid solution. The invention also relates to a plant for carrying out the method according to the invention.

The application relates to the technical field of concrete waste slurry application, and particularly discloses a process for preparing recycled aggregate from non-fluid silicate concrete waste. The process comprises the following steps: (1) after the non-fluid silicate concrete waste is finely ground, the non-fluid silicate concrete waste is uniformly mixed with a silicate cement, graphene, asbestos fiber, a ferrous sulfate or ferrous sulfate aqueous solution, and then granulated, the obtained granules are standard cured, and a pretreated body is obtained after completion; (2) the pretreated body is immersed in a calcium bicarbonate solution, after completion, the pretreated body is separated out and placed in an EDTA or EGTA-containing sodium carbonate solution for activation treatment. After completion, the obtained pretreated body is standard cured again, and recycled aggregate is obtained. The above process of the application utilizes the characteristics of the non-fluid silicate concrete waste to prepare high-strength recycled aggregate, not only realizes resource utilization of the non-fluid silicate concrete waste, but also makes the non-fluid silicate concrete waste better play its own advantages to obtain high-performance recycled aggregate products.

The application provides a non-asbestos fiber rubber gasket for a chemical plant, and relates to the technical field of rubber gaskets. The non-asbestos fiber rubber gasket for the chemical plant comprises a gasket body, trapezoidal protrusions and trapezoidal grooves are alternately distributed on the upper and lower ends of the gasket body, the distal sides of the trapezoidal protrusions are uniformly provided with round convex points, and the distal sides of the trapezoidal grooves are uniformly provided with round convex points; the rubber material used by the non-asbestos fiber rubber gasket comprises the following raw materials in parts by weight: 8-10 parts of rubber master batch, 1-2 parts of non-asbestos fiber, 0.2-0.3 parts of accelerator, 0.2-0.3 parts of anti-aging agent, 0.2-0.4 parts of vulcanizing agent, 0.1-0.3 parts of foaming agent and 0.2-0.4 parts of crosslinking agent. The non-asbestos fiber rubber gasket has better mechanical properties, moderate hardness, better sealing effect, higher compression rate and higher resilience, and can be used for a longer time during pipeline maintenance and replacement.

The utility model relates to circuit board technical field especially relates to a fireproof circuit board. The utility model provides such a fireproof circuit board, including installation base, circuit board body, asbestos fibre fireproof buffer layer, aluminium hydroxide flame -retardant isolation layer, flame -retardant epoxy resin layer, deflector, circuit board wiring interface and fireproof cover, installation base top installs circuit board body, and the right -hand member of circuit board body has integrated circuit board wiring interface, and asbestos fibre fireproof buffer layer is fixed on installation base. Through the multilayer protection structure that fireproof cover, asbestos fibre fireproof buffer layer, aluminium hydroxide flame -retardant isolation layer, flame -retardant epoxy resin layer etc. constitute, combine the active fire extinguishing mechanism of heptafluoro propane fire extinguishing bag and high temperature crushing layer, form the complete protection chain from the outside barrier to internal fire extinguishing, can effectively block external flame burn circuit board body, and the fireproof effect is greatly promoted.

The utility model belongs to the technical field of cement boards, and particularly relates to an energy-saving heat-preservation fiber cement board which comprises a cement board body, a metal board is arranged in the cement board body, a fiber cement base material layer is connected to the outer side of the metal board, a metal net rib layer is connected to the outer portion of the fiber cement base material layer, and the metal net rib layer is arranged on the cement board body. A heat preservation layer is arranged on the outer side of the metal net rib layer. A decorative face is arranged on the outer side of the heat preservation layer, and a plurality of corrugated rods are fixed to one end face outside the cement board body. According to the metal plate, the overall strength of the cement plate can be improved, the fracture risk of the plate in the using process is prevented, the fiber cement base material layer is formed by mixing and condensing cement, an adhesive and thermoasbestos fibers, the toughness and crack resistance of the plate can be improved, the fiber cement base material layer and the metal plate can be surrounded and protected by the metal net rib layer, and the service life of the plate is prolonged. The layering between the fiber cement base material layer and the metal plate can be prevented, and the integrity and the strength of the cement plate are effectively improved.

The utility model relates to the technical field of steelmaking, and discloses an improved structure of a furnace cover of an intermediate frequency furnace in a steel plant, which comprises a furnace body, a flange arranged on the outer side and a furnace cover body arranged on the top, the sealing assembly is arranged at the bottom of the furnace cover body and comprises a first sealing ring fixedly connected to the bottom of the furnace cover body, an induction coil is arranged in the furnace body, a mica base plate is arranged at the top of the induction coil, and a first asbestos fiber plate is arranged at the top of the mica base plate; a second asbestos fiber board is arranged at the top of the first asbestos fiber board; by arranging the sealing assembly, the connecting structure of the furnace cover body and the induction coil is optimized, the stability and the sealing performance of the furnace cover body are improved, the service life of the furnace cover body is prolonged, the damage influence of steel leakage on equipment is reduced, the influence on production is reduced, the maintenance cost of the equipment is reduced, and therefore the production efficiency and the economic benefits of a steel plant are improved.