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Aeration type coal ash flotation process

A fly ash, aeration technology, applied in flotation, solid separation and other directions, can solve the problems of high power consumption and high process cost

Inactive Publication Date: 2014-12-24
FUJIAN LONGYAN LONGNENG FRYASH COMPREHENSIVE UTILIZATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The disadvantage of the above technical solution is that special physical trays need to be set up, and the power consumption is large, resulting in high process cost

Method used

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  • Aeration type coal ash flotation process
  • Aeration type coal ash flotation process
  • Aeration type coal ash flotation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The fly ash flotation process of the present embodiment comprises the steps:

[0049] (1) Add flotation agent and / or collector to the fly ash raw material to form a mixed material;

[0050] (2) In the first flotation device, the mixed material obtained in step (1) is dropped from the upper part of the first flotation device;

[0051] (3) The gas blowing upward is formed in the first flotation device through the bubble diffusion device of the aeration device, and the gas forms countercurrent contact with the mixed material falling in step (2);

[0052] In this step, a part of the mixed material flowing into the lower part of the first flotation device is moved upwards through a flow pushing device arranged at the lower part of the first flotation device. The flow pushing device is arranged under the side of the bubble diffusion device, and its The pushing flow direction is obliquely pointing above the bubble diffusion device. Specifically, the angle between the pushing ...

Embodiment 2

[0065] The fly ash flotation process of the present embodiment comprises the steps:

[0066] ⑴ Prepare the fly ash raw material into the mixed material to be flotation;

[0067] (2) In the first flotation device, the mixed material obtained in step (1) is dropped from the upper part of the first flotation device;

[0068] (3) forming an upwardly blown gas in the first flotation device through the bubble diffusion device arranged in the first flotation device, and the gas forms countercurrent contact with the mixed material falling in step (2);

[0069]In this step, a part of the mixed material flowing to the lower part of the first flotation device is moved upward through a flow pushing device arranged in the lower part of the first flotation device, and the flow pushing device is arranged at the bottom of the bubble diffusing device. downward, and its pushing direction is vertically directed above the bubble diffusion device; use frequency conversion to control the rotationa...

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Abstract

The invention provides an aeration type coal ash flotation process method. The aeration type coal ash flotation process method comprises first-stage flotation, the first-stage flotation comprises the following steps of: (1) preparing raw coal ash materials as mixed materials to be floated; (2) dropping the mixed materials obtained from the step (1) from the upper part of first flotation equipment in the first flotation equipment; (3) forming upwards blown air in the first flotation equipment through a bubble diffusion device of an aerating device, wherein the air and the dropped mixed materials obtained from the step (2) generate counterflow contact, the aerating device comprises the bubble diffusion device, and the bubble diffusion device is positioned in a cylinder body of the first flotation equipment and below the bottom end of a discharge pipeline and comprises a plurality of air diffusion holes or air diffusion pipes which are used for overflowing bubbles; and (4) collecting granules formed from the step (3) in such a way that the air upwards moves and overflown from the top end or the upper part of the first flotation equipment, wherein partial mixed materials dropped onto the lower part inside the first flotation equipment are enabled to upwards move through a flow thrust device arranged on the lower part inside the first flotation equipment.

Description

technical field [0001] The invention relates to a fly ash flotation process, more specifically, the invention relates to an aeration type fly ash flotation process. Background technique [0002] Fly ash is one of the largest industrial wastes in my country, and the annual slag discharge in China has reached 30 million tons at this stage. With the development of the power industry, the discharge of fly ash from coal-fired power plants is increasing year by year. Fly ash contains a large amount of unburned carbon particles, which can be used as a raw material for the manufacture of activated carbon after flotation. [0003] Chinese patent 200810143173.3 discloses a new process for producing activated carbon from fly ash. The raw material is fly ash, the waste material of power plant boilers. The dispersant and compound flotation agent are also added to the pulp pretreatment through the automatic dosing machine, and then enter the first-stage flotation column and the second-s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03D1/14
Inventor 许闽清
Owner FUJIAN LONGYAN LONGNENG FRYASH COMPREHENSIVE UTILIZATION