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1. 发明专利

GB547096A Improvements in and relating to the wet separation or classification of solid materials 未知
公开(公告)号：GB547096A
公开(公告)日：1942-08-13
申请号：GB1587540
申请日：1940-10-30
申请人： DORR CO INC
IPC分类号： B03B5/50
摘要： 547,096. Wet separating. DORR CO., Inc. Oct. 30, 1940, No. 15875. Convention date, Nov. 7, 1939, [Class 82 (ii)] In the wet separation or classification of solid materials, a stream of liquid containing suspended solids is provided having an horizontal and unobstructed upper surface and in communication with an underlying and substantially static body of liquid, the stream being controlled to cause selected solids to pass downwardly into the underlying body of liquid from which they are removed. The stream flows through a zone or pool of progressively increasing depth controlled by an overflow weir located below the communication with the underlying body of liquid. The upper part of the lower end of a classifying tank 7 provided with reciprocating means such as rakes 8 to remove material therein upwardly is covered by a sloping roof 13 divided into sections 13a, 13b by a transverse slot 26 bounded by a depending lip 38 and a baffle 15 on which is adjustably mounted a partition 41 having an overhanging lip 41A forming a weir. The side walls 16 and an end wall 18 mounted on the tank 7 form with the deck 13 a trough within the upper part of which is fitted, and adjustably mounted therein, a U-shaped trough 35 having an end wall which forms with the well 18 a feed section or trough 17. The lower end of the wall 21 terminates a short distance from the part 13b to form a transverse slot 22 the size of which is adjustable by a gate adjustably mounted on the wall 21, and the base 27 of the trough is provided with an upstanding baffle 37. The upper portion of the sides of the tank 7 extend higher than that of the upper sides of the trough so that a higher liquid level is maintained therein than in the pool in the zone 28 formed between the wall 21 and the weir 41A. In operation, the solids in suspension are fed into the feed section 17 and flow through the opening 22 in a relatively thin sheet, over the baffle 37 and down through the slot 26 into the tank 7. As no opening is provided in the tank, the suspension fills up the latter and forms a pool in the zone 28 bounded by the weir 41A. Further supply of suspension causes the latter to overflow over the weir, only the largest particles passing through the slot 26 into the tank below. The rest of the solids in the suspension pass over the weir 41A and are discharged over a lip 14 at the end of the section 13a. Additional water from a pipe 42 may be supplied to the tank 7 and, as there is no outlet from the latter, causes an upward current of water through the opening 26, thus carrying therewith any small or intermediate-sized particles that have passed through the slot.

2. 发明专利

FI18298A Kontinuerligt arbetande, roterande filter av skiv- eller trumtyp 未知
公开(公告)号：FI18298A
公开(公告)日：1938-12-22
申请号：FI18298D
申请日：1936-07-21
申请人： DORR CO INC
发明人： HILLIER GERALD O
IPC分类号： B01D33/00 , B01D33/06

3. 发明专利

GB495909A Concentration of ores 未知
公开(公告)号：GB495909A
公开(公告)日：1938-11-22
申请号：GB2870437
申请日：1937-10-21
申请人： DORR CO INC
IPC分类号： B03D1/001
摘要： Ores in which at least a portion of the floatable material is present as an oxygen-containing compound and which contain siliceous gangue are concentrated by a froth flotation process in which a higher fatty acid or a salt of such an acid is used as collecting agent and a soluble cyanide is added as a depressing agent for the gangue. The fatty acid must contain at least 8 carbon atoms in the molecule, oleic acid, sodium oleate, stearic acid, and stearates being specifically referred to. Other collecting agents such as xanthates and frothers such as pine oil may be added. The cyanide also improves the quality of the froth and in some cases acts as an activator for the oxidized mineral. The flotation of oxidized and mixed sulphide-oxide copper ores and of non-metallic minerals, e.g. kyanite, is referred to. The use of sodium silicate, sodium carbonate, and gums as depressing agents for silica &c. also is referred to.

4. 发明专利

GB490112A Combined flocculation and sedimentation apparatus 未知
公开(公告)号：GB490112A
公开(公告)日：1938-08-09
申请号：GB3016237
申请日：1937-11-03
申请人： DORR CO INC
IPC分类号： B01D21/00 , C02F1/52
摘要： 490,112. Gravity-separation apparatus. TRIGGS, W. W. (Dorr Co., Inc.) Nov. 3, 1937, No. 30162. [Class 111] In the treatment of liquids by flocculation and subsequent sedimentation, the liquid is fed to a zone in which it is subjected to flocculation by gentle mechanical agitation and is then passed into a communicating zone which surrounds or encircles the flocculating zone and in which the solids are separated by sedimentation. In the construction shown, a sedimentation tank 1 is provided with an effluent outlet 7, and a sludgedischarge outlet 24 into which the solids are raked by rotatable mechanism SM. The liquid to be treated enters the tank through a vertical pipe 43, on which is rotatably mounted a structure 28 supporting the mechanism SM. A flocculation zone surrounding the structure 28 is defined by a drum 40, the base of which is formed with apertures 42. The drum is supported by bars 29, the ends of which rest on the wall of the tank 1. The bars also support a motor 30 which drives paddles 47 whereby flocculation is effected. A coagulating chemical for assisting flocculation may be added to the liquid under treatment.

5. 发明专利

GB483902A Filters 未知
公开(公告)号：GB483902A
公开(公告)日：1938-04-27
申请号：GB2071437
申请日：1937-07-27
申请人： DORR CO INC
IPC分类号： B01D33/00 , B01D35/12 , B01D35/16
摘要： 483,902. Filters. DORR CO., Inc. July 27, 1937, No. 20714. Convention date, July 27, 1936. [Class 46] In a filter comprising a series of disc filter elements, in order that the cakes detached from adjacent elements by reverse pressure may not obstruct each other provision is made for the application of reverse pressure first to alternate discs only or to corresponding sections of alternate discs and subsequently to the intermediate discs or the corresponding sections of the intermediate discs. In the apparatus shown a number of discs are supported within a casing 1, to which the material to be filtered is supplied through an inlet 12, by a frame consisting of a central shaft 36, radius rods 42 and four filtrate manifolds 37, 38, 39, 41. The manifolds are separately connected by pipes 43, and passageways 82, Fig. 7, in a continuation shaft 80 to a valve member 86 rotating in a housing 101 having a filtrate outlet 104 and a connection 111 to a source of fluid pressure for causing reverse flow to discharge the cakes from the discs. Each disc element is built up of four sectors 51 .. 54. Each sector is held in position on the frame by a clip 48 on the shaft 36, a stud and boss 46 on one filtrate manifold and a coupling 45 on another manifold. As shown in Fig. 3, the interior of the sector 51 is in communication with the manifold 38 by means of a coupling 45, and the sectors 52, 53, 54 are in communication with the manifolds 39, 41 and 37 respectively. For the adjacent discs the sectors 51, 52, 53, 54 communicate respectively with the manifolds 37, 38, 39, 41. When the cakes are to be discharged from the elements a piston valve 106, Fig. 7, is moved to the position shown in which the connection 111 is opened so that as the shaft 80 rotates, reverse pressure is directed successively to each of the passages 82 and the corresponding manifold. Valves 94 are provided for shutting- off any one of the passages 82 independently.

6. 发明专利

FR823552A 未知
公开(公告)号：FR823552A
公开(公告)日：1938-01-22
申请号：FR823552D
申请日：1937-06-24
申请人： DORR CO INC

7. 发明专利

FR817873A 未知
公开(公告)号：FR817873A
公开(公告)日：1937-09-13
申请号：FR817873D
申请日：1937-02-15
申请人： DORR CO INC
IPC分类号： E02B8/02

8. 发明专利

GB459288A Improvements relating to the purification of liquids 未知
公开(公告)号：GB459288A
公开(公告)日：1936-12-29
申请号：GB3461736
申请日：1935-03-29
申请人： DORR CO INC
IPC分类号： B01D21/00 , C02F1/52
摘要： Apparatus for purifying water, sewage, or other liquid comprises a flocculation tank with agitating means and a settling tank, arranged side-by-side and separated by a partition acting as a baffle to prevent agitation in the flocculating tank being communicated to the settling-tank while allowing of direct transfer of suspended flocks to the settling-tank. The apparatus may be as described in Specification 459,126.

9. 发明专利

GB459126A Improvements relating to the purification of liquids 未知
公开(公告)号：GB459126A
公开(公告)日：1936-12-29
申请号：GB988535
申请日：1935-03-29
申请人： DORR CO INC
IPC分类号： C02F1/52
摘要： 459,126. Purifying liquids. DORR CO., Inc., 247, Park Avenue, New York, U.S.A. March 29, 1935, No. 9885. Convention date, March 29, 1934. [Classes 46 and 111] In purifying water, sewage, or other liquid, the liquid, after treatment with reagent which forms flocks, is caused to flow in an upward direction and at the same time agitated so that the flocks take a form which settles more readily. The liquid after treatment with reagent is supplied through a pipe 24, and passes successively through compartments 20 ..23 which communicate alternately at top and bottom so that the liquid flows downwardly in the compartments 20, 22 and upwardly through compartments 21, 23. Each of the compartments is provided with paddles fixed on a vertical rotary shaft. A series of such compartments is provided on either side of a wall 19. The vertical shafts are driven by bevel gearing, a horizontal driving shaft extending over each row of compartments. From the tanks 23 the liquid is distributed into a settling-tank 18 by a channel 50, the outer side of which is built up of longitudinally-arranged boards spaced apart to form horizontal slots. Specification 459,288 is referred to.

10. 发明专利

FR802769A 未知
公开(公告)号：FR802769A
公开(公告)日：1936-09-15
申请号：FR802769D
申请日：1936-03-02
申请人： DORR CO INC
IPC分类号： C02F3/28

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