A kind of tempering material for making mineral wool from hot blast furnace slag and its preparation method

Abstract

The invention discloses a conditioning material for preparation of mineral wool from thermal blast furnace slag and a preparation method thereof. The conditioning material for preparation of mineral wool from thermal blast furnace slag is composed of the following raw materials by mass: 30-80% of nepheline, 5-40% of fly ash, 2-10% of Cr2O3, and 5-20% of NaNO3. The preparation method of the conditioning material for preparation of mineral wool from thermal blast furnace slag sequentially includes the steps of: (1) weighing nepheline and fly ash according to mass percentage, and fully mixing them to obtain a mixture A; then weighing Cr2O3 and NaNO3 according to mass percentage, and fully mixing them to obtain a mixture B; and (2) weighing the mixture A and mixture B according to mass percentage, and fully mixing them to obtain the conditioning material for preparation of mineral wool from thermal blast furnace slag. The conditioning material provided by the invention has the advantages of low cost, easily available raw materials and easy processing, and significant conditioning effect. The prepared granulated wool has the characteristics of good high temperature melt glassy state, high fiber forming rate, good quality of formed fiber, and adjustable acidity coefficient.

Description

technical field [0001] The invention relates to the technical field of mineral wool production, in particular to a tempering material for producing mineral wool from hot blast furnace slag and a preparation method thereof. Background technique [0002] With the rapid development of the global economy, the problem of energy shortage is becoming more and more serious, and the technology of energy saving and emission reduction has become a research hotspot all over the world. At present, my country's energy situation is severe, and the product energy consumption index is too high. The energy consumption per unit of the main energy-consuming products is 25-90% higher than that of developed countries (the weighted average is about 40% higher); secondly, the energy consumption of the output value is high. Energy consumption is one of the highest in the world. For example, for every kilogram of oil equivalent of energy, Japanese companies can create an average output value of 10.2 U...

AI Technical Summary

Problems solved by technology

[0005] In the process of producing mineral wool from hot blast furnace slag, it is necessary to add a certain amount of tempering material to the hot blast furnace slag (1400-1600°C) to improve its physical and chemical properties (the conditioning material accounts for 10-20% of the mass of mineral wool) , so that the high-temperature melt meets the quality requirements of mineral wool preparation. At present, the research in this area is limited. The existing conditioning materials are usually composed of feldspar and one or more of silica sand, basalt, and dolomite. However, the conditioning material The tempering effect is general, especially in improving the bubbles, streaks and other defects inside the high-temperature mineral wool melt, as well as the vitrification generation ability, melt fiber formation rate, fiber quality, mineral wool appearance quality (mineral wool fiber quality) Large color difference, complex color) and other aspects of the conditioning effect is not good