Research On Fiber Forming About Melting Characteristics Of Various Industrial Solid Waste Mixed At High Temperature

With the rapid development of industrial fields induce a large number of industrial solid waste to produce in recent years.The industrial solid waste accumulation pose a threat to ecological balance.As characters of the fly ash,steel slag and other solid waste,we can produce mineral wool by centrifugal force after re-melting the raw materials.It is an effective method to solve the pollution problems caused by industrial solid waste,at the same time we can carry out the saying of "turning the waste into treasure ".The study was projecting to use hydrothermal hot-pressing equipment to fix fly ash,steel slag,magnesium slag,coke powder and cement.Then will test cold and hot compress strength of the test block.Apart from this,the characteristic temperature and high-temperature viscosity of two-component system or multi-component system will be detected.Finally,the effects of different cooling conditions about crystals appeared in the samples will be studied during the cooling process.The main researchers were that:(1)With fly ash,steel slag as the main material,then adding a small amount of coke powder and cement mixed in the way of suppression will form a test block.Then use universal testing machine to test the pressure strength.The results show that with the increase of the amount of coke powder,the cold compressive strength and hot compressive strength of the test block decrease gradually.When the content of coke powder is 12%,the compressive strength of the test block is the lowest.The samples were detected by X-ray diffraction(XRD)shows that hydrated calcium silicate(Ca2SiO4 · 0.5H2O),calcium carbonate(CaCO3)were formed in the test block after curing,so the block's compressive strength was improved.(2)The characteristic temperature was tested by ash fusion point determination meter,and the high-temperature viscosity was detected by high-temperature viscosity tester.The results show that the melting temperature of the mixed materials can be reduced to about 1300 ? when 40% steel slag or magnesium slag is added to the fly ash.At high temperature,with the increasing content of steel slag and magnesium slag in fly ash,the viscosity of mixed samples will decrease gradually with the temperature rises,in the region with temperature higher than 1450 ?,the gradient of the viscosity curve is slow.When temperature less than 1450 ?,the gradient of the viscosity curve is steep.Through detecting the multi-component system materials show that the rate of the viscosity changed with temperature have a relationship with the content of Fe2O3 in the sample.As a whole,the rate of the viscosity changed with temperature decrease with the content of Fe2O3 increases.(3)Using different cooling methods to deal with fly ash and steel slag,fly ash and magnesium slag materials,then detecting the grinding samples by XRD shows that:(1)The temperature from 1500 ? to 1300?,crystals will not appeared in mixed raw material,indicating reduced to a higher temperature,it is not conducive to precipitation of crystals.(2)It shows that the greater the rate of cooling,the more detrimental to the precipitation of crystals.(3)When reaching the set temperature,as the residence time increases at set temperature,the crystal is easily appeared in the samples.(4)Compared with air cooling,water cooling method can effectively reduce the crystal appeared during cooling process.(5)Fly ash and magnesium slag or fly ash and steel slag mixed materials which composition is different,it will appear the same crystal during the cooling process.(6)Glassy matter and crystalline minerals can be converted to each other under certain conditions,when the temperature exceeds the flow temperature,most of the minerals gradually into a glassy material,and glassy matter in the process of cooling will be converted to crystal minerals.