Research of heat stresses in components of blast furnace tuyere

Abstract

Using computer simulating in Deform 2D it was researched the effect of insert thickness and air gap size, separating it from the internal cylinder, on temperature pattern and stresses in the insert and the internal cylinder. It was shown, that with the increase a clearance between the insert and the internal cylinder and with increase the insert thickness, weight average values of voltage decrease in it. They have been more evenly spread with increases of insert thickness. In tuyere design it was offered increasing it thickness to 13 mm for hardening. Key words: tuyere, blast furnace, insulation insert, internal cylinder, temperature pattern, stress.

Analysis of Erosion Mechanism of Wear‐Resistant Layer in Large Blast Furnace Tuyere

“…Then, the Fe in slag and hot metal reacts with the alloy elements in the wear‐resistant layer to alter the composition and properties of the original wear‐resistant layer, resulting in alternating temperature differences and greater thermal stress. [ 19 ] Under the influence of thermal stress, microcracks emerge in the slag‐iron layer or alloy wear–resistant layer. Then, these microcracks propagate toward the inner side of the wear‐resistant layer under the influence of alternating temperature difference.…”