Device for drying moist material to be ground

Claim 1

A device for drying moist material to be ground, especially pit moist lime and clay, which includes a housing having an upper portion with inlet means for conveying material to be dried into the interior of said housing and also having a lower portion with central outlet means for discharging dried material from said housing, twist ring means including a helical guiding path and arranged adjacent said outlet means for introducing hot air into said housing in countercurrent flow to the flow of material to be dried, rotatable stray dish means arranged within said housing for receiving and distributing the material to be dried with a twist opposite to the twist of the hot air flow, said rotatable stray dish means including means for driving connection with a motor, hot air discharge means arranged at the upper portion of said housing for discharging hot air from said housing, and funnel-shaped downwardly tapering guiding surface means arranged in the interior of said housing for guiding the material to be dried from the upper portion of said housing through the latter and for conveying hot air in countercurrent flow to the flow of material to be dried to said hot air discharge means, said housing below every said funnel-shaped guiding surface means having configuration which widens again to largest diameter of said housing and subsEquently narrows again toward said outlet means, a double cone arranged in a range of the lowermost guiding surface means within said widening and narrowing guiding surface means in spaced relation thereto to define therewith a path for hot air and for dried material, said funnel-shaped guiding surface means including a plurality of serially arranged downwardly tapering conical guiding surfaces and at least two stray dishes arranged in vertical direction one below the other and located within the region of the largest diameter of said housing, and at least one motor driving means driving said stray dishes upon the uppermost of which material to be dried is given off, said twist ring means including one portion thereof arranged above said outlet means for entry of hot air which streams through said housing from below to the top with a twist counter to twist of said stray dishes through which material is directed.

Claim 2

A device for drying moist material to be ground, especially pit moist lime and clay, which includes a housing having an upper portion with inlet means for conveying material to be dried into the interior of said housing and also having a lower portion with central outlet means for discharging dried material from said housing, twist ring means including a helical guiding path and arranged adjacent said outlet means for introducing hot air into said housing in countercurrent flow to the flow of material to be dried, rotatable stray dish means arranged within said housing for receiving and distributing the material to be dried with a twist opposite to the twist of the hot air flow, said rotatable stray dish means including means for driving connection with a motor, hot air discharge means arranged at the upper portion of said housing for discharging hot air from said housing, and funnel-shaped downwardly tapering guiding surface means arranged in the interior of said housing for guiding the material to be dried from the upper portion of said housing through the latter and for conveying hot air in countercurrent flow to the flow of material to be dried to said hot air discharge means, said housing below every said funnel-shaped guiding surface means having configuration which widens again to largest diameter of said housing and subsEquently narrows again toward said outlet means, a double cone arranged in a range of the lowermost guiding surface means within said widening and narrowing guiding surface means in spaced relation thereto to define therewith a path for hot air and for dried material, said funnel-shaped guiding surface means including a plurality of serially arranged downwardly tapering conical guiding surfaces and at least two stray dishes arranged in vertical direction one below the other and located within the region of the largest diameter of said housing, and at least one motor driving means driving said stray dishes upon the uppermost of which material to be dried is given off, said twist ring means including one portion thereof arranged above said outlet means for entry of hot air which streams through said housing from below to the top with a twist counter to twist of said stray dishes through which material is directed.