A Blast Furnace Distribution Chute and Its Design and Analysis Method

Abstract

The invention relates to a blast furnace distribution chute and a design and analysis method thereof. The blast furnace distribution chute comprises a chute body 1, guide rails 2 arranged on two sides of the upper part of the chute body 1, and an axial baffle plate 3; the chute body 1 forms a chute way consisting of wall plates on two sides and a bottom surface; the bottom surface of the chute body 1 consists of a large arc concave surface 14, a small arc convex surface 12 and an arc conical surface 11 connected in sequence in the material flowing direction; and at least two arc stop ribs 13 are arranged on one side, near the small arc convex surface 12, of the large arc concave surface 14. A discrete element method is adopted to simulate to analyze the material current collecting characteristics to design and adjust a chute shape of the blast furnace distribution chute and a rib distribution scheme, so that a full-covered pad is formed in a material current impact area in the chute way during distributing, the blast furnace distribution chute with prominent beating and grinding effects is finally designed, the impact and the wear of the blast furnace distribution chute by material currents can be effectively relieved, and the service life of the blast furnace distribution chute is prolonged.

Description

technical field [0001] The invention relates to a blast furnace distributing chute, in particular to a blast furnace distributing chute with the effects of material beating and abrasive grinding, and a design analysis method thereof. Background technique [0002] The blast furnace distribution chute is subjected to strong material flow impact, and the impact damage and wear of the material flow impact area in the chute channel are particularly serious. It is broken down and holes appear, so the longevity of blast furnace distribution chute has attracted the attention of many engineers and technicians, such as: [0003] The Chinese patent with the authorization announcement number CN100552047C discloses a "distribution chute", in which a number of unit liners with alloy cutter heads are fixed axially in series and radially in parallel on the inner circular surface of the semicircular shell. The alloy cutter head is injected into the unit lining plate to improve the wear resi...

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Problems solved by technology

[0006] In the structural schemes of the blast furnace distribution chute disclosed above, most of them adopt complex lining plate structure, forming radial grooves or "well"-shaped grooves in the chute to store certain materials and form a local material accumulation effect, but due to the structure Due to the limitation, the effect of accumulating material needs to be strengthened, and the material flow impact area cannot form a fully covered material cushion, so that some structures in the tank (such as liners, etc.) are exposed to the impact of material flow; and there are defects in the liner or auxiliary structures. The sharp angle has poor anti-wear effect; therefore, although the service life can be extended compared with the ordinary blast furnace distribution chute, there are still complex structures and material accumulation due to the lack of "material-beating" and "material-abrasive" effects. After the structure is destroyed in a short period of time, the protection effect on the impact area of ​​the chute is poor, resulting in a short service life

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