Environment-friendly bottom filter tank system for blast furnace granulated slag

Abstract

The invention provides an environment-friendly bottom filter tank system for blast furnace granulated slag, which comprises a bottom filter tank (8), a bottom filter tank sealing cover (13) and a granulation tower (11), wherein low slag grabbing equipment is arranged above the bottom filter tank (8), the low slag grabbing equipment is positioned in the bottom filter tank sealing cover (13), and a steam pipeline (10) is connected between the bottom filter tank sealing cover (13) and the granulation tower (11); the low slag grabbing equipment comprises a cart track (1), a cart mechanism (2), a trolley track (3), a trolley mechanism (4) and a slag digging device (5) which are sequentially arranged. The low slag grabbing equipment solves the swing problem of the grab bucket of a bridge type grab bucket crane, avoids material scattering, and can realize accurate slag grabbing to avoid damage to a filter material structure of a bottom filter tank; the bottom filter tank sealing cover is used for sealing the whole bottom filter tank, and the problem of sulfur-containing steam pollution of the bottom filter tank is solved.

Description

technical field [0001] The invention relates to the technical field of blast furnace ironmaking equipment, in particular to a blast furnace slag environment-friendly bottom filter system. Background technique [0002] High-temperature liquid slag (1350°C-1500°C) is produced during blast furnace smelting, and domestic production of molten iron produces about 280 million tons of high-temperature liquid slag each year. [0003] At home and abroad, the sedimentation filtration method (often called the bottom filtration method) water slag process is usually used to treat the slag. Hydraulic slag flushing is carried out in front of the blast furnace, and the slag is crushed by water quenching to become a loose slag-water mixture (commonly known as water slag), and the water slag enters the bottom filter tank through the slag flushing ditch. The liquid water is filtered through the multi-layer filter material in the bottom filter tank, and solid wet slag particles are left on the ...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of poor slag grabbing accuracy and difficult maintenance of the above-mentioned sulfur-containing steam corrosion equipment and bridge grab cranes, the present invention provides a blast furnace slag-friendly bottom filter system, wherein the low-profile slag grabbing equipment It solves the swing problem of the grab bucket of the bridge grab crane, avoids material spreading, and can realize accurate slag grabbing to avoid damaging the filter material structure of the bottom filter tank; the bottom filter tank is sealed by using the bottom filter tank sealing cover, and the bottom filter tank is also solved. Sulfur-containing steam pollution problems in pools

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