Method for producing magnesium silicate fiber blanket by smelting residual fusion slag of ferronickel through utilizing laterite-nickel ore

Abstract

The invention discloses a process method for producing a magnesium silicate fiber blanket by smelting residual fusion slag of ferronickel through utilizing laterite-nickel ore. The method comprises the following steps of: by utilizing laterite-nickel ore fused waste residues as a basic raw material, adding limestone powder, dolomite powder, talc powder, basalt powder and kaolin powder into a maintaining furnace, entering a melt launder after thermally insulating for 40-50 minutes, passing through a four-roller centrifuge, preparing magnesium silicate fiber yarns in a fiber forming chamber by continuously throwing through the centrifuge and spraying through the high pressure air, extruding to cotton by a cotton collector, after forming the cotton, solidifying and cooling, entering an opposite puncture needle machine, needling to the magnesium silicate fiber blanket, thermally treating at 700-900 DEG C, and at last, cutting and forming according to the size. The magnesium silicate fiber blanket provided by the invention has high content of alkaline earth oxides, is a soluble fiber, and can be widely applied to the fireproof, heat insulation, thermal insulation and sound-proof fields.

Description

technical field [0001] The invention relates to a process method for producing a magnesium silicate fiber blanket by using the residual molten waste smelting of laterite nickel ore. The product can be widely used in the fields of fire resistance, heat insulation, heat preservation, sound insulation and the like. Background technique [0002] At present, aluminum silicate fiber blankets are widely used in the fields of fire resistance, heat insulation, heat preservation, and sound insulation. The aluminum silicate fiber blankets are made of natural coke gemstones. Made by cutting, its main component is SiO 2 、Al 2 o 3 , and its working temperature is generally lower than 950 degrees. However, due to the depletion of domestic coke gemstone resources, the quality continues to decline, and the price has been rising all the way, resulting in a gradual decrease in the performance of aluminum silicate fibers. It is urgent to find a new energy-saving material to replace, and thi...

AI Technical Summary

Problems solved by technology

However, if traditional mineral fibers such as rock wool, mineral wool, glass wool, and aluminum silicate wool are inhaled into the human body (respiratory tract, lungs), they are difficult to degrade and stay in the body for a long time, which will cause respiratory diseases and even induce cancer

[0005] In the applicant's above application, since the temperature of the molten slag is as high as 1500°C-1600°C, there is basically no energy consumption for smelting. The content of oxides is still low, and the half-life of the human body inhalation test is long, so there is still room for improvement in the mineral wool fiber made