JPS6372500U

JPS6372500U -

Info

Publication number: JPS6372500U
Application number: JP16647686U
Authority: JP
Priority date: 1986-10-29
Filing date: 1986-10-29
Publication date: 1988-05-14

Description

[Brief explanation of the drawing]

第１図ないし第５図は本考案の一実施例による
鉄粉予熱供給装置を説明するための図であり、第
１図はその一部断面側面図、第２図はその断面正
面図、第３図はその鉄粉予熱器部分の断面側面図
、第４図はその平面図、第５図は上記実施例装置
が採用された鉄粉還元炉の概略構成図、第６図は
本考案の構成を説明するための図である。図において、１は還元炉本体（熱処理炉）、７
は鉄粉予熱供給装置、８は鉄粉予熱器、８ａは粉
体通路の出口、１０は供給ホツパ、１０ｃは供給
弁側直管部入口、１２は鋼管（粉体通路）、１２
ａは排ガス通路（熱風通路）、１４は供給弁、θ
はホツパ頂角、βは摩擦角である。 1 to 5 are diagrams for explaining an iron powder preheating supply device according to an embodiment of the present invention, in which FIG. 1 is a partially sectional side view, FIG. 2 is a sectional front view, and FIG. Fig. 3 is a cross-sectional side view of the iron powder preheater portion, Fig. 4 is a plan view thereof, Fig. 5 is a schematic configuration diagram of an iron powder reduction furnace in which the above-mentioned embodiment device is adopted, and Fig. 6 is a diagram showing the structure of the iron powder reduction furnace of the present invention. FIG. 3 is a diagram for explaining the configuration. In the figure, 1 is the reduction furnace main body (heat treatment furnace), 7
1 is an iron powder preheating supply device, 8 is an iron powder preheater, 8a is an outlet of the powder passage, 10 is a supply hopper, 10c is an inlet of the straight pipe part on the supply valve side, 12 is a steel pipe (powder passage), 12
a is an exhaust gas passage (hot air passage), 14 is a supply valve, θ
is the hopper apex angle, and β is the friction angle.

Claims

[Claims for Utility Model Registration] (1) Powder is caused to flow down in a powder passage formed in the vertical direction, and hot air is caused to flow in a hot air passage formed to cross the powder passage. a supply hopper connecting the preheater and a heat treatment furnace for reducing powder in a reducing atmosphere; and a supply valve disposed at the lower end of the hopper; In a powder preheating supply device that preheats powder and supplies it to a heat treatment furnace by its own weight, a straight line connecting the peripheral edge of the powder passage outlet of the preheater and the peripheral edge of the inlet of the straight pipe part on the supply valve side. A powder preheating supply device characterized in that the hopper apex angle formed by the powder is equal to or less than the friction angle of the powder. (2) The powder preheating supply device according to claim 1, wherein the heat treatment furnace is an iron powder reduction furnace, and the hopper apex angle is 20 degrees or less.