Method for manufacturing micro-hollow and micro-bubble rock wool by using basalt as a main ingredient and product of the method

Abstract

The invention relates to a method for manufacturing a micro-hollow and micro-bubble rock wool by using basalt as a main ingredient and a product of the method. The method comprises the following steps of: 1, firing; 2, preparation of materials: pulverizing basalt, dolomite or limestone (which serves as a fluxing agent) to be a lump material with the diameter being 3-10CM, pulverizing fluorite andsilica (which serve as regulators) to be a lump material with the diameter being 0.5-2CM, processing combustion-supporting carbon to be a lump material with the grain diameter being 5-15Cm, and preparing the materials according to the weight proportion of 60-85 percent of basalt, 10-28 percent of dolomite or 10-28 percent of limestone, 5-15 percent of fluorite and 0-10 percent of silica and according to the volume ratio that aggregated rocks to combustion-supporting carbon is 4.5-6 to 3-4; 3, charging: charging the prepared combustion-supporting carbon and the prepared aggregated rocks in sequence into a smelting furnace according to a laminated circular charging way until the furnace is filled up; 4, smelting: smelting the basalt, the regulator and the aggregated rocks serving as combustion-supporting agents to form smelted streams; and 5, fiber-making: performing high speed centrifugation on the smelted streams, continuously air-blowing the smelted streams at high pressure and cooling to prepare a rock wool fiber having a micro-hollow and micro-bubble structure. By the method, the defect of technology prejudice is overcome, the method is simple in process and low in cost, and the product has high quality.

Description

technical field [0001] The invention relates to a method for making rock wool and the product thereof, in particular to a method for making micro-hollow and micro-bubble rock wool with basalt as the main material and the product of the method. Background technique [0002] The production of rock wool in the prior art usually uses iron slag left over from ironmaking as the main raw material, plus a small amount of limestone and basalt as regulators, and is melted at high temperature in a cupola furnace and blown into fibers to make rock wool. Among them, due to material reasons, the content of silica in the rock wool produced is relatively low, and there are quality defects such as short fibers, poor toughness, heavy weight, thermal insulation, flame retardancy, and poor corrosion resistance. Although silica-rich stone raw materials are widely available and silica has the characteristics of stable performance, due to the high melting point of silica-rich rocks, for many years...

AI Technical Summary

Problems solved by technology

[0002] The production of rock wool in the prior art usually uses iron slag left over from ironmaking as the main raw material, plus a small amount of limestone and basalt as regulators, and is melted at high temperature in a cupola furnace and blown into fibers to make rock wool. Among them, due to material reasons, the content of silica in the rock wool produced is relatively low, and there are quality defects such as short fibers, poor toughness, heavy weight, thermal insulation, flame retardancy, and poor corrosion resistance.

Although silica-rich stone materials are widely available and silica has the characteristics of stable performance, due to the high melting point of silica-rich rocks, for many years, those skilled in the art generally believe that: in the production of rock wool, rich Due to its high melting point, silica stone material is usually used as an additive in the process of making rock wool. Since the melting of silica-rich stone requires a high furnace temperature, the processing cost is relatively high, and it is usually difficult to use a high proportion Natural stone rich in silica is used as the main material to make rock wool

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