CN-122006298-A - Deep and dense tailing fluidization control discharging system and control method

CN122006298ACN 122006298 ACN122006298 ACN 122006298ACN-122006298-A

Abstract

The application provides a deep dense tailing fluidization control discharging system and a control method, wherein the system comprises a bin body, a sand discharging pipe, a split-flow pressure-bearing device, an annular pipe group, an air inlet pipe, a liquid inlet control valve, an air inlet pressure-reducing valve, an air inlet throttle valve, an air inlet pressure gauge and a mass flowmeter, wherein a horn mouth is arranged in the bin body, at least one end of the sand discharging pipe is positioned outside the bin body and is provided with a concentration meter and a sand discharging control valve, the split-flow pressure-bearing device comprises a cap body which is fixed in the bin body and is provided with a conical top surface, the annular pipe group comprises a first annular pipe and a second annular pipe which are provided with nozzles, the air inlet pipe is communicated with the first annular pipe and is provided with an air inlet control valve, an air inlet pressure-reducing valve, an air inlet throttle valve, an air inlet pressure-reducing valve, an air inlet pressure gauge and an air inlet electromagnetic flowmeter are arranged in the liquid inlet pipe and a communication branch pipe is communicated with the air inlet pipe and the liquid inlet electromagnetic flowmeter, and is provided with a reflux control valve. The deep dense tailing fluidization control discharging system and the control method provided by the application are beneficial to improving tailing hardening.

Inventors

LI GONGCHENG
WANG YUZHONG
XU WENLONG
CHEN XUN
Yao Liaoyang
YIN SHENGHUA
Fan zongyu
GAO MINGFA
XU PING
CHEN QIUSONG
LIU ZHIHE
WANG LEIMING

Assignees

山东理工大学

Dates

Publication Date: 20260512
Application Date: 20251230

Claims (10)

1. A deep dense tailing fluidization control discharge system, comprising: The device comprises a bin body, wherein an accommodating space for accommodating at least tailing slurry is formed in the bin body, and the height direction of the bin body is a first direction; The sand discharge pipe is fixed in the bin body, the middle part of the sand discharge pipe is positioned in the accommodating space and is provided with a downward horn mouth, and the horn mouth and the inner bottom of the bin body are arranged at intervals along the first direction; The top surface of the cap body forms a conical surface and covers the bell mouth, the center of the conical surface is aligned with the center of the bottom of the inner side of the bin body, and the edge of the cap body is arranged at intervals with the inner wall of the bin body; The annular tube group is arranged below the bell mouth and surrounds the bell mouth, and comprises a plurality of annular tubes, a plurality of nozzles, a plurality of first annular tubes and a plurality of second annular tubes, wherein each annular tube is arranged around the bell mouth at intervals, and the outlets of the nozzles are arranged upwards; The air inlet pipe is respectively communicated with the air supply assembly and the first annular pipe, and is provided with an air inlet control valve, an air inlet pressure reducing valve, an air inlet throttle valve, an air inlet pressure gauge and a mass flowmeter; the liquid inlet pipe is respectively communicated with the liquid supply assembly and the second annular pipe, and is provided with a liquid inlet control valve, a liquid inlet pressure reducing valve, a liquid inlet throttle valve, a liquid inlet pressure meter and a liquid inlet electromagnetic flowmeter; The communication branch pipe is communicated with the liquid inlet pipe through the communication branch pipe, and is provided with a branch pipe valve for controlling the on-off of the communication branch pipe; and the return pipes are respectively communicated with a plurality of annular pipes and are provided with return control valves.
2. The deep-thickening tailing fluidization control discharge system according to claim 1, wherein a plurality of the annular pipes are concentrically arranged at the bottom of the inner side of the bin body, at least two first annular pipes are arranged at intervals along the second direction, at least two second annular pipes are arranged at intervals along the second direction, the second direction is perpendicular to the first direction, and the nozzles of two adjacent annular pipes are arranged in a staggered manner.
3. The deep thickening tailing fluidization control discharge system of claim 1, wherein the nozzles comprise a first nozzle disposed in the first direction, and a second nozzle disposed obliquely to the first direction, the second nozzle being at an angle a to the horizontal of 40 ° no less than a no more than 50 °.
4. The deep dense tailings fluidization control discharge system of claim 1 wherein the communication manifold includes a first manifold extending obliquely from the inlet conduit toward the bin body to the inlet conduit and a second manifold extending obliquely from the inlet conduit toward the bin body to the inlet conduit; the branch pipe valve comprises a first one-way valve which is arranged on the first branch pipe and can be opened and closed, and a second one-way valve which is arranged on the second branch pipe and can be opened and closed.
5. The deep-thickening tailing fluidization control discharge system according to claim 1, wherein the bin body comprises a cylindrical section, a conical section and a collecting tank which are sequentially connected along the first direction, wherein the bottom of the collecting tank is configured to be the inner bottom of the bin body; the conical section is in an inverted conical shape, and an included angle between the conical section and the horizontal plane is b, and b is more than or equal to 60 degrees and less than or equal to 70 degrees.
6. The deep dense tailing fluidization control discharge system according to claim 1, wherein a linear distance between an edge of the cap and an inner wall of the adjacent bin is not less than 0.22m in a radial direction of the cap, and/or, The thickness of the cap body is not less than 16mm, and/or, The linear spacing distance between the flare and the inside bottom of the cartridge body is 0.5m to 1.5m along the first direction, and/or, A linear spacing distance between the flare and the annular tube in the first direction is 0.2m to 0.5m, and/or, The included angle between the top surface of the cap body and the horizontal plane is c, and c is more than or equal to 45 degrees and less than or equal to 65 degrees.
7. A control method of a deep dense tailing fluidization control discharge system, characterized by using the deep dense tailing fluidization control discharge system as set forth in any one of claims 1 to 6, the method comprising: Providing an initial tailings slurry to the containment space; The method comprises the steps of starting an air supply assembly, opening an air inlet control valve, a backflow control valve and a branch pipe valve, adjusting the opening of the air inlet pressure reducing valve and the air inlet throttle valve, responding to the pressure in an air inlet pipe to reach the preset air inlet pressure, closing the backflow control valve when the air flow reaches the preset air flow, and starting the first time; The valve opening of the liquid inlet pressure reducing valve and the liquid inlet throttle valve is regulated, the liquid flow reaches the preset liquid flow after the pressure in the liquid inlet pipe reaches the preset liquid inlet pressure, and the second time timing is started; and opening the sand discharge control valve in response to the concentration of the tailing slurry in the sand discharge pipe being equal to the preset concentration after the second preset duration.
8. The method of controlling a deep dense tailings fluidization control discharge system of claim 7 wherein the response is after a first predetermined period of time and before the beginning of the second time count further comprises: Closing the branch pipe valve.
9. The control method of a deep dense tailings fluidization control discharge system of claim 7 further comprising: Responding to the condition that the concentration of the tailing slurry in the sand discharge pipe is smaller than the preset concentration after the second preset duration is continued, and performing at least one liquid reduction operation until the concentration of the tailing slurry in the sand discharge pipe is equal to the preset concentration; Responding to the condition that the concentration of the tailing slurry in the sand discharge pipe is greater than the preset concentration after the second preset time duration is continued, and performing at least one liquid adding operation until the concentration of the tailing slurry in the sand discharge pipe is equal to the preset concentration; Wherein, a liquid-reducing operation includes: Adjusting the opening of a valve of the liquid inlet throttle valve to reduce the liquid flow in the liquid inlet pipe by a first difference and start timing; After responding to the duration of the third preset time, acquiring the concentration of the tailing slurry in the sand discharge pipe at the moment through a concentration meter, and comparing the concentration with the preset concentration to obtain a comparison result; The primary liquid adding operation comprises the following steps: adjusting the opening of the liquid inlet throttle valve to increase the liquid flow in the liquid inlet pipe by a second difference and starting timing; And after the fourth preset time is responded, the concentration of the tailing slurry in the sand discharge pipe at the moment is obtained through a concentration meter, and the concentration is compared with the preset concentration, so that a comparison result is obtained.
10. The control method of the deep dense tailing fluidization control discharging system according to claim 7, wherein a portion of the sand discharging pipe which is disposed outside the bin body is provided with a sand discharging electromagnetic flowmeter; After the sand discharge control valve is opened, the sand discharge control valve further comprises: acquiring the current sand discharge flow through the sand discharge electromagnetic flowmeter; Responding to the current sand discharge flow being smaller than the preset sand discharge flow, performing at least one pressurizing operation until the sand discharge flow is equal to the preset sand discharge flow; Responding to the current sand discharge flow being greater than the preset sand discharge flow, performing at least one decompression operation until the sand discharge flow is equal to the preset sand discharge flow; Wherein, a supercharging operation includes: The opening of the air inlet pressure reducing valve and the opening of the liquid inlet pressure reducing valve are regulated so that the pressure in the liquid inlet pipe and the pressure in the air inlet pipe are increased by a third difference; acquiring the sand discharge flow at the moment through the sand discharge electromagnetic flowmeter, and comparing the sand discharge flow with the preset sand discharge flow to obtain a comparison result; the one-time depressurizing operation includes: The opening of the air inlet pressure reducing valve and the opening of the liquid inlet pressure reducing valve are regulated so that the pressure in the liquid inlet pipe and the pressure in the air inlet pipe are reduced by a third difference; and acquiring the sand discharge flow at the moment through the sand discharge electromagnetic flowmeter, and comparing the sand discharge flow with the preset sand discharge flow to obtain a comparison result.

Description

Deep and dense tailing fluidization control discharging system and control method Technical Field The application relates to the technical field of tailing treatment, in particular to a deep dense tailing fluidization control discharging system and a control method. Background The tailing filling is almost the only mode of green disposal in large batch, and is to take tailing slurry as a main raw material, add water and stir to form homogeneous mixed slurry (namely, tailing slurry) and then backfill the slurry into an underground goaf by adding cementing materials or other additives, so that the problem of environmental pollution of a tailing pond can be solved, potential safety hazards of the tailing pond can be eliminated, surface subsidence can be prevented, and safe and efficient recovery of resources can be realized. The tailing thickening is used as a primary link of mine filling, flocculant is added into tailing slurry, fine-grain tailings are aggregated to form larger floccules under the action of flocculant adsorption bridging, the sedimentation speed of tailing particles is accelerated, and the thickening effect is improved. However, with the continuous improvement of the current mineral separation technology level, the ore granularity is smaller as the ore granularity is ground, so that the tailing slurry gradually tends to be highly mud, and the addition of the flocculating agent in the thickening process causes the technical problems of poor flowability, hardening, difficult discharging, low concentration efficiency and the like of the tailing slurry after the tailing slurry is deeply thickened. Disclosure of Invention Accordingly, the present application is directed to a deep dense tailing fluidization control discharging system and a control method thereof, which at least partially solve the above problems. In view of the above object, a first aspect of the present application provides a deep dense tailing fluidization control discharge system, including a bin body having an accommodating space formed therein for accommodating at least a tailing slurry, a height direction of the bin body being a first direction; the sand discharge pipe is fixed on the bin body; the middle part of the sand discharge pipe is positioned in the accommodating space and is provided with a downward horn mouth, the horn mouth is arranged at intervals with the inner bottom of the bin body along the first direction, at least one end of the sand discharge pipe penetrates through the bin body, the sand discharge pipe is provided with a concentration meter and a sand discharge control valve, a diversion pressure-bearing device comprises a cap body and a supporting frame, the cap body is fixed in the accommodating space through the supporting frame and is positioned above the sand discharge pipe, the top surface of the cap body forms a conical surface and covers the horn mouth, the center of the conical surface is aligned with the center of the inner bottom of the bin body, the edge of the cap body is arranged at intervals with the inner wall of the bin body, a ring pipe set is positioned below the horn mouth and is arranged around the horn mouth, the ring pipe set comprises a plurality of ring pipes, each ring pipe is arranged at intervals around the horn mouth and is provided with a plurality of nozzles, the outlets of the nozzles are arranged upwards, the ring pipes comprise a first ring pipe and a second ring pipe, a pressure reducing valve, a ring inlet assembly, a ring liquid inlet valve, a pressure reducing valve, a pressure inlet assembly, a pressure inlet valve, a pressure inlet assembly, a pressure regulator, a pressure gauge and a pressure regulator are respectively arranged, and a pressure meter are respectively connected with the pressure inlet pipe, the pressure inlet assembly, the pressure inlet valve and the pressure meter are respectively, the air inlet pipe is communicated with the liquid inlet pipe through the communication branch pipe, the communication branch pipe is provided with a branch pipe valve for controlling the on-off of the communication branch pipe, the return pipes are respectively communicated with the annular pipes, and the return pipes are provided with return control valves. Optionally, the plurality of annular pipes are concentrically arranged at the bottom of the inner side of the bin body, the first annular pipes are provided with at least two annular pipes at intervals along the second direction, the second direction is perpendicular to the first direction, and the nozzles of the two adjacent annular pipes are staggered. Optionally, the nozzles comprise a first nozzle arranged along the first direction and a second nozzle obliquely arranged relative to the first direction, wherein the angle between the second nozzle and the horizontal direction is a, and a is more than or equal to 40 degrees and less than or equal to 50 degrees. Optionally, the communication branch pipe comprises a