3results about How to "High char formation rate" patented technology

The invention discloses an ablation-resistant EPDM (Ethylene-Propylene-Diene Monomer) thermal insulation material and a preparation method thereof, and belongs to the field of thermal insulation materials, the thermal insulation material is prepared from the following components in parts by mass: 70 to 80 parts of EPDM rubber, 20 to 30 parts of liquid EPDM, 15 to 20 parts of silicon dioxide, 10 to 40 parts of high-temperature-resistant filler, 10 to 15 parts of flame retardant, 10 to 15 parts of heat-resistant fiber and 3 to 5 parts of cross-linking agent. A third monomer of the ethylene propylene diene monomer is ethylidene norbornene, and the ethylene content is 50-60%. The raw materials are placed between double rollers to be mixed, and a mixed sheet is obtained; and performing vulcanization molding on the mixed sheet to obtain the ablation-resistant ethylene-propylene-diene monomer thermal insulation material. The content of the heat-resistant fibers is increased, the aramid fibers are subjected to in-situ carbonization to form a carbonized layer structure frame, and meanwhile, the content of SiO2 is regulated and controlled, so that the content of SiO2 is matched with the increase of the fibers, and the ablation resistance of the thermal insulation material is improved.

Provided are a continuous flat pressing surface layer flame-retardant particle board and a preparation method thereof, which can reduce the burning growth rate index of the flame-retardant particle board and the influence of the flame retardant on the surface bonding strength of the particle board. The method comprises: simultaneously atomizing and applying, to raw material particles, 10-15% of the mass of the particles of a melamine modified urea-formaldehyde resin adhesive and 0.5-0.8% of the mass of the particles of a sodium hydroxide aqueous solution with a concentration of 0.4-0.6 mol / L to obtain pretreated surface layer particles, and blending the surface layer particles with a surface layer flame retardant PAP-Mg-Zn at a mass ratio of 100:15-17 to obtain flame-retardant surface layer particles; and laying the flame-retardant surface layer particles and core layer particles in a manner that the surface layer particles are in the upper and lower layers and the core layer particles are in the middle layer, and then continuously flat pressing the board blank at a hot pressing speed of 220-250 mm / s to obtain the continuous flat pressing surface layer flame-retardant particle board. The structural formula of PAP-Mg-Zn is as follows.

The present invention discloses a coke substitute product for a metallurgical vertical furnace and an application method thereof, and belongs to the field of metallurgical technology. The present invention produces a metallurgical coke substitute product with high strength, high durability and certain sealing properties by pressurizing and encapsulating a mixture of fossil and / or biological carbon-rich materials used for coking into carbon in a single miniature steel container serving as a carbonization chamber and a protective shell. When in use, the product is directly added to the vertical furnace along with other furnace charges, and during the downward process, the heat energy in the furnace is used to dry and distill the internal materials and form a carbonized body, and after the steel shell is dissolved, melted or broken, it participates in the furnace reaction and carburizes the molten iron, and finally supports the material column at the bottom of the vertical furnace. Under the condition that carbon-rich blocks are directly added to the charge to compensate for the carbon required for the carbon gasification reaction, the present invention can achieve all or most of the coke substitution, and at the same time, it can completely get rid of the dependence on coking coal required by the prior art.