Method for preparing inorganic refractory fiber product from thermal-state pulverized fuel ash or slag

Abstract

The invention discloses a method for preparing an inorganic refractory fiber product from thermal-state pulverized fuel ash or slag, and aims to lower production cost and lower environmental pollution. The method comprises the following steps of: connecting a propeller and a fully-sealed pipeline to a spare slag-discharging port of a utility boiler, and directly conveying thermal-state slag and fly ash to a resistance furnace; heating a molten material to form a molten pool suitable for draining a high-temperature melt; draining molten pool melt from a pore in the middle of a tungsten or molybdenum flow port at the bottom of the boiler to form stream; making the stream flow onto a spinning roller rotating at a high speed, and spinning into fibers under the action of centrifugal force; uniformly spraying a bonding agent into the fibers, uniformly paving the fibers containing the bonding agent to form a cotton quilt, conveying to a cotton receiving position on a cotton collector through a transmission belt, and uniformly settling on the cotton collecting screen belt to form a blanket; conveying to a curing system on a pressurizing felt coiling machine through a cotton collecting machine; heating the fibers with a microwave drying furnace; forcedly cooling to 0-20 DEG C with circulating water; and cutting, screening a finished product, laminating, packing and recovering scrap edges.

Description

technical field [0001] The invention relates to a method for manufacturing inorganic refractory fiber products by using fly ash. Background technique [0002] The existing refractory fibers in the domestic and foreign markets are basically divided into two categories: namely, low-temperature products represented by rock wool, slag wool, and glass wool fibers made of ordinary rock, slag, and glass as the main raw materials, and their refractory temperature is below 700°C; And high-temperature products represented by alumina powder, silica powder, high-aluminum content coal gangue and burnt gemstones as the main raw materials of aluminum silicate fiber, the refractory temperature of which is above 900 °C. At present, low-temperature products such as rock wool are mainly used in general industrial insulation and building fireproof insulation places; in recent years, more and more have entered the construction field, mainly used in ordinary residences, commercial buildings, publ...

AI Technical Summary

Problems solved by technology

With the continuous development of the global economy, the demand for refractory fibers has increased year by year, and the application fields have continued to increase. The existing production has been difficult to meet the growth of demand.

But at the same time, the prices of raw materials such as alumina powder and silica powder are rising day by day, which greatly increases the production cost of high-temperature refractory fiber products and restricts market demand.