Patent ID: 8052922

Claim:
A rotary batch distributor for a shaft furnace, comprising an axle platform and at least three blades which are equally spaced around and fixed to the axle platform by means of support brackets extending radially from the axle platform, wherein the surface of each of the blades is configured as an involute of a truncated cone, each of the blades consists of at least three trapezoidal sections, tilting angles of the trapezoidal sections with respect to an axis of the rotary batch distributor and to the horizontal plane are defined by truncated cone generators bounding the sections and meeting at the same point (F) on the axis of the rotary batch distributor, position of the point being defined by the intersection between the axis of the rotary batch distributor and the generator passing through an attachment point of the blade to the support bracket at an angle of 50-65° with respect to the axis of the rotary batch distributor, the blade surface area is restricted by a value of sector angle (γ) ranging from 90° to 120° and by the radius of the circumscribed circle of the rotary batch distributor (Rp), the blade end part having a surface area equal to 5-10% of the blade surface area is arranged at an angle of 125-140° with respect to the previous section, and the tilting angle of the generator passing through the base of the blade end part with respect to the axis of the rotary batch distributor ranges from 88° to 90°.