Thermal-state slag online modification device

Abstract

The invention relates to the fields of sensible-heat utilization of metallurgical high-temperature slag and efficient comprehensive utilization of resources, and provides a thermal-state slag online modification device. Through the device, high-quality modified slag can be prepared by use of the sensible heat of slag. The device comprises a top plug, a modification furnace body, a primary wind gap, a secondary wind gap, a third wind gap, a cyclone hearth, a stirring paddle, a partition wall, a slope pool bottom, a slag discharge hole, an iron liquid discharge hole, a scrap iron separation wall, a flue, a handle, a pressure relief hole, a combustion observation hole, an ignition burner, a modification chamber observation hole, a concurrent heating burner, a slag discharge chamber observation hole, a liquid flow hole, a charging hole, a sampling hole, a modification chamber, a scrap iron separation chamber, a slag discharge chamber and a cyclone furnace body. The high-quality modified slag after the treatment by the device can be directly applied to the fields such as building materials and industries; the metal iron can be recycled from the iron-containing slag. The device is simple to operate, low in operation cost and wide in application range, and has relatively good application prospect and economic value.

Description

technical field [0001] The invention relates to the fields of sensible heat utilization of metallurgical high-temperature slag and efficient comprehensive utilization of resources, and provides an online upgrading device for hot slag. Background technique [0002] In metallurgical industries such as iron and steel, hundreds of millions of tons of liquid metallurgical slag need to be discharged every year, such as blast furnace slag, steel slag, nickel-iron slag, stainless steel slag, etc. These metallurgical slags not only contain many useful inorganic components, such as CaO, SiO 2 、Al 2 o 3 , MgO, etc., and also contains residual metal elements that can be extracted and recovered, such as Fe, Mn, Cr, Ni, etc. The slag discharge temperature is 1200-1650°C, the enthalpy value is 1.6-1.7GJ / t, and the calorific value per ton of slag is equivalent to 50-60kg standard coal, which has high waste heat resources. With the excessive production capacity of the metallurgical indus...

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Problems solved by technology

The patent "a liquid steel slag treatment process and device" (CN101691620A) uses gas as a medium to recover the waste heat in the steel slag and realize the granulation of the steel slag, but does not realize the slag modification, and relies on physical methods to recover the waste heat, and the recovery efficiency of the remaining heat is Also low, difficult to achieve industrially

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