SU1243826A1 - Apparatus for conditioning pulp - Google Patents

Description

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The invention relates to the enrichment of minerals by the flotation method and is intended to classify and process the pulp with reagents (conditioning) before entering the flotation machines and can be used in coal, mining, and other industrial areas.

The purpose of the invention is to increase the efficiency of conditioning the coal pulp before flotation due to the preliminary preparation of the raw material. Figure 1 shows the proposed apparatus, a General view; FIG. 2 shows a gate control unit; on fig.Z - node supply of reagents and air, node I in fig .. 2.

The apparatus for conditioning the pulp includes a housing 1 with a receiving chamber A, a sedative B and classification B compartments of the main chamber and a mixing chamber G. A wall 2 is installed between the receiving chamber and the soothing compartment, the quiet and classification compartments are separated by a trapezoidal threshold 3 with a wall for additional smoothing of the pulp flow. In the classification compartment, an unloading gate 4 with a receiving channel 5 and a guide gate 6 is installed, controlled by the grain size distribution. Between the classic compartment and the mixing chamber, the overflow threshold 7 is installed. In the mixing chamber D, inclined planes 8, jet pumps 9, funnels 10 through which reagents are supplied, and pipes 11 for supplying compressed air. The receiving chute 5 includes a density sensor 12, an amplifier 13, a gr-meter 14, an actuator 15 driving an output to a shut-off and regulating 1st organ 16 with a screw pair 17. To remove aerosols of reagents from the mixing chamber D serves pipe 18, the charging port is a slurry pipe nineteen.

The apparatus works as follows.,

The pulp through the loading pipe 19 enters the receiving chamber A

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1243826g

 Kojpnyca 1, goes into a soothing compartment B, from which, through trapezoidal threshold 3, which serves to further smooth out the fluctuations of the pulp flow, it is poured into the classification compartment B.

In the classification compartment, the particles are arranged in size from bottom to top and glide along an inclined one. the bottom to the gate 4, Part of the current with grains of coal of a certain hydraulic size (more than 0.4 mm) is discharged through the gate 4 into the receiving channel 5. From the receiving channel 5, the pulp goes to the density sensor 12, from where the electrical signal goes to the amplifier .13, which is connected to the particle size 14 and, through the actuator of the actuator 15, controls the locking and regulating body 16 with the screw pair 17, forcing the gate valve 6 to open automatically, depending on the grain size of the coal.

Poured the desired product out of the receiving chute 5 for appropriate purpose, 51 and is intended to be used instead of going to waste.

The main flow of pulp through the rectangular opening of the overflow threshold 7 is poured into the mixing chamber D, where the jet pumps 9 are located 100 mm below the upper edge of the overflow threshold. Thus, a non-heated zone is formed under the jet pumps and the wall of the overflow threshold.

The jet pumps from the funnels 10 are supplied with reagents, the compressed air coming through the pipes 11, entraining the reagents into the non-flooded zone, forms an aerosol, which in the countercurrent mode (bottom-up) penetrates the flow of pulp. In this process, larger grains of coal are processed. Pads on inclined planes 8, the pulp is additionally mixed with reagents, the excess of which is transferred from large particles of coal to small ones. The pulp uniformly treated with reagents through the discharge nozzle 20 enters the flotation machines, and the residual aerosol of the reagents is discharged through pipe 18.

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YU

Editor A.Dolinich

Compiled by E.Tarasova Tehred L.Oleinik

Order 3741/10 Circulation 514 Subscription

VNIIPI USSR State Committee for Inventions and Discoveries

113035, Moscow, Zh-35, Raushsk nab, 4/5

Production and printing company, Uzhgorod, st. Project, 4

Proofreader V.Sinitska;

Claims (1)

, USSR Copyright Certificate No. 1002023, cl. B 03 D 1? 14, 1981. 1 PULP AIR CONDITIONING DEVICE *, including a body with a bottom, a receiving, main and mixing chambers, a partition with an overflow threshold installed between the main and mixing chambers, a reagent spray located in the mixing chamber below the overflow threshold, characterized in that, in order to improve the efficiency of conditioning the coal pulp before flotation due to the preliminary preparation of raw materials, the apparatus is equipped with a trapezoidal threshold in its cross section installed in the main chambers and dividing it into the stilling and classification compartments, and a gate with a drive, while in the partition from the bottom there is a window covered with a gate, to the edges of which there is a receiving chute with a device for measuring particle size distribution connected with the gate drive, and part the bottom of the classification compartment adjacent to the partition is located at an angle of 6 to 7 ⁰ to the horizontal plane.