MATERIAU DE PULVERISATION A LA FLAMME A HAUTE TENEUR EN SILICE

• Main Authors: HIDEYUKI TSUDA, MASATAKA MATSUO, HARUYUKI UENO
• Format: Patent
• Language: French
• Published: 05.08.1988
• Edition: 4
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS; DIFFUSION TREATMENT OF METALLIC MATERIAL; FUELS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIME, MAGNESIA; LUBRICANTS; METALLURGY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; REFRACTORIES; SLAG; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TREATMENT OF NATURAL STONE

L'INVENTION CONCERNE UN MATERIAU DE PULVERISATION A LA FLAMME A TENEUR EN SILICE.SELON L'INVENTION, IL CONTIENT 93,5 A 99,6 EN POIDS DE SIO, 0 A 1,5 EN POIDS DE ALO, O A MOINS DE 2,0 EN POIDS DE CAO, 0 A 1,0 EN POIDS DE FEO, ET 0,4 A 2,0 EN POIDS DE NAO.L'INVENTION S'APPLIQUE NOTAMMENT AUX MATERIAUX POUR LA REPARATION DES FOURS A COKE. PURPOSE:To obtain a highly siliceous material for thermal spraying forming a thermally sprayed repaired body which can withstand use over a long period by mixing SiO2 with Al2O3, CaO, Fe2O3 and Na2O in a specified ratio. CONSTITUTION:This highly siliceous material for thermal spraying consists of, by weight, 93.9-99.6% SiO2, <=1.5% Al2O3, <=2.0% CaO, <=1.0% Fe2O3 and 0.4-2% Na2O. The material is a powdery material suitable for the repairing of a kiln, especially a coke oven by flame spraying. The material forms a thermally sprayed body having >=about 60% degree of crystallinity immediately after thermal spraying and the volume is hardly shrunk by transition from the glass phase to the crystal phase, so cracking followed by stripping is not caused. The material gives a thermally sprayed repaired body having a coefft. of thermal expansion nearly equal to that of silica brick, independent of repeated changes of heat and capable of withstanding use for a long period.