Defoaming method for thickener in beneficiation plant and device implementing same

Abstract

The invention discloses a defoaming method for a thickener in a beneficiation plant and a device implementing the same. The device is characterized in that a plurality of high-pressure atomizing nozzles are arranged on a thickener rotating arm outwards in sequence along the end of a central rotating shaft, rotate along with the rotating arm and are connected with a water outlet end of a high-pressure plunger pump by a high-pressure pipeline; a pressure sensor and an overflow valve are arranged at the water outlet end of the pump; and a variable frequency motor provides power for the high-pressure plunger pump and is controlled by a variable frequency controller. The pressure information of the water outlet end of the pump is fed back to the variable frequency controller by the pressure sensor, the rotating speed of the variable frequency motor is adjusted, and the variable frequency motor controls the water flow by changing the rotating speed of the high-pressure plunger pump, so that the water pressure of a water outlet of the pump reaches a set value. A water source is filtered underground water, tap water or overflow water of the thickener. A fundamental principle of the invention is that foam impact is eliminated via high-pressure atomized water sprayed by the nozzles. The method has the advantages that the defoaming effects are obvious; the energy consumption is low; the water consumption is low; surfactants are not added, so that impacts on the subsequent beneficiation operation can not be exerted; the range of application is wide; and the solid content of the overflow water of the thickener can be effectively reduced, thus reducing loss of concentrates.

Description

technical field

[0001] The invention relates to a defoaming method, in particular to a method for eliminating floating foam in a thickener in a mineral processing plant. The invention also relates to a device for realizing the defoaming method of the thickener of the ore dressing plant. Background technique

[0002] Thickeners (also known as thickeners) are usually used in concentrators to concentrate flotation concentrates and medium ore foams. Because the ore pulp contains a relatively high concentration of agents with foaming properties, the generated foams are stable and cannot burst in time. Accumulate gradually, and form a spongy floating foam layer after dehydration and solidification, with a thickness of 100mm-500mm. The foam layer contains a large amount of concentrate, which cannot be effectively settled and flows away with the overflow water, causing economic losses to the concentrator. For example, the thickness of the foam layer of a thickener in a tungsten ore...

Examples

Embodiment 1

[0036] The foam defoaming test of a 38m thickener in Henan Luanchuan Tungsten Ore Concentrator was carried out by adopting the method described in the present invention. Before the test, the thickness of the foam layer of the concentrator thickener was about 500mm, the solid content of the surface foam was about 60%, the solid content of the overflow water was about 7%, and the loss of tungsten in the overflow water was about 5%. During the test, according to figure 1As shown, nine high-pressure atomizing nozzles 1 are sequentially arranged on the thickener arm 2 of the thickener 13 along the 3 ends of the central rotating shaft, and the distance between adjacent high-pressure atomizing nozzles 1 is 1000mm. Change and adjust up and down, the distance is always kept at 500mm, and the water outlet form of the high-pressure atomizing nozzle 1 is adjusted to be cone-shaped mist, and the cone angle is 15°. The speed of the variable frequency motor 9 is adjusted by the frequency co...

Embodiment 2

[0038] The defoaming test of two 20m thickeners in Hunan Chenzhou fluorite ore dressing plant was carried out by using the method described in the present invention. Before the test, the thickness of the foam layer of the concentrator thickener was about 300mm, the solid content of the surface foam was about 57%, the solid content of the overflow water was about 6%, and the loss of fluorite in the overflow water was about 6%. During the test, according to figure 1 As shown, on the thickener arm 2 of the thickener 13, five high-pressure atomizing nozzles 1 are sequentially arranged along the 3 ends of the central rotating shaft, and the distance between adjacent high-pressure atomizing nozzles 1 is 1000mm. Change and adjust up and down, the distance is always kept at 500mm, and the water outlet form of the high-pressure atomizing nozzle 1 is adjusted to be cone-shaped mist, and the cone angle is 15°. The speed of the variable frequency motor 9 is adjusted by the frequency conv...

Embodiment 3

[0040] The defoaming test of a 32m thickener in Hunan Shizhuyuan polymetallic mineral processing plant was carried out by adopting the method of the present invention. Before the test, the thickness of the foam layer of the concentrator thickener was about 300mm, the solid content of the surface foam was about 61%, the solid content of the overflow water was about 8%, the loss of tungsten in the overflow water was about 6%, and the tin was about 11%. During the test, according to figure 1 As shown, eight high-pressure atomizing nozzles 1 are sequentially arranged on the thickener arm 2 of the thickener 13 along the 3 ends of the central rotating shaft, and the distance between adjacent high-pressure atomizing nozzles 1 is 1000mm. Change and adjust up and down, the distance is always kept at 500mm, and the water outlet form of the high-pressure atomizing nozzle 1 is adjusted to be cone-shaped mist, and the cone angle is 15°. The speed of the variable frequency motor 9 is adjus...

technical field

[0001] The invention relates to a defoaming method, in particular to a method for eliminating floating foam in a thickener in a mineral processing plant. The invention also relates to a device for realizing the defoaming method of the thickener of the ore dressing plant. Background technique

[0002] Thickeners (also known as thickeners) are usually used in concentrators to concentrate flotation concentrates and medium ore foams. Because the ore pulp contains a relatively high concentration of agents with foaming properties, the generated foams are stable and cannot burst in time. Accumulate gradually, and form a spongy floating foam layer after dehydration and solidification, with a thickness of 100mm-500mm. The foam layer contains a large amount of concentrate, which cannot be effectively settled and flows away with the overflow water, causing economic losses to the concentrator. For example, the thickness of the foam layer of a thickener in a tungsten ore...

Examples

Embodiment 1

[0036] The foam defoaming test of a 38m thickener in Henan Luanchuan Tungsten Ore Concentrator was carried out by adopting the method described in the present invention. Before the test, the thickness of the foam layer of the concentrator thickener was about 500mm, the solid content of the surface foam was about 60%, the solid content of the overflow water was about 7%, and the loss of tungsten in the overflow water was about 5%. During the test, according to figure 1As shown, nine high-pressure atomizing nozzles 1 are sequentially arranged on the thickener arm 2 of the thickener 13 along the 3 ends of the central rotating shaft, and the distance between adjacent high-pressure atomizing nozzles 1 is 1000mm. Change and adjust up and down, the distance is always kept at 500mm, and the water outlet form of the high-pressure atomizing nozzle 1 is adjusted to be cone-shaped mist, and the cone angle is 15°. The speed of the variable frequency motor 9 is adjusted by the frequency co...

Embodiment 2

[0038] The defoaming test of two 20m thickeners in Hunan Chenzhou fluorite ore dressing plant was carried out by using the method described in the present invention. Before the test, the thickness of the foam layer of the concentrator thickener was about 300mm, the solid content of the surface foam was about 57%, the solid content of the overflow water was about 6%, and the loss of fluorite in the overflow water was about 6%. During the test, according to figure 1 As shown, on the thickener arm 2 of the thickener 13, five high-pressure atomizing nozzles 1 are sequentially arranged along the 3 ends of the central rotating shaft, and the distance between adjacent high-pressure atomizing nozzles 1 is 1000mm. Change and adjust up and down, the distance is always kept at 500mm, and the water outlet form of the high-pressure atomizing nozzle 1 is adjusted to be cone-shaped mist, and the cone angle is 15°. The speed of the variable frequency motor 9 is adjusted by the frequency conv...

Embodiment 3

[0040] The defoaming test of a 32m thickener in Hunan Shizhuyuan polymetallic mineral processing plant was carried out by adopting the method of the present invention. Before the test, the thickness of the foam layer of the concentrator thickener was about 300mm, the solid content of the surface foam was about 61%, the solid content of the overflow water was about 8%, the loss of tungsten in the overflow water was about 6%, and the tin was about 11%. During the test, according to figure 1 As shown, eight high-pressure atomizing nozzles 1 are sequentially arranged on the thickener arm 2 of the thickener 13 along the 3 ends of the central rotating shaft, and the distance between adjacent high-pressure atomizing nozzles 1 is 1000mm. Change and adjust up and down, the distance is always kept at 500mm, and the water outlet form of the high-pressure atomizing nozzle 1 is adjusted to be cone-shaped mist, and the cone angle is 15°. The speed of the variable frequency motor 9 is adjus...

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