CN2879173Y

CN2879173Y - On-line detecting device for concentration and granularity of mining slurry

Info

Publication number: CN2879173Y
Application number: CN 200620019247
Authority: CN
Inventors: 雷毓佳; 徐刚; 唐刘; 潘莲辉; 蒋鲲鹏
Original assignee: YUNNAN TIN INDUSTRY GROUP LLC
Current assignee: YUNNAN TIN INDUSTRY GROUP LLC
Priority date: 2006-01-25
Filing date: 2006-01-25
Publication date: 2007-03-14
Anticipated expiration: 2016-01-25

Abstract

This utility model is an online detecting device for pulp particle size and density, pertaining to the device for detecting synchronously the pulp particle size and density in the industry of ore dressing. The medial surface of cylindrical screen in the device is equipped with a wedge guide strip. The screen body, whose cavity is equipped with a sluice and an inlet pipe, is in drive connection with electromotor shaft. And the fine sand bucket is provided below the body. The other end of the sluice is connected with coarse sand bucket. The overflow pipes on the top of the fine and the coarse sand buckets are in connection with the water storage bucket. All the fine and coarse sand buckets and water storage bucket are connected with weighing cells whose signal terminals are linked to CPU. The utility model is characterized with simple and reasonable structure, online detection of pulp particle size and density, easy operation, small maintenance, higher measurement precision and high screening efficiency.

Description

The dense granularity on-line measuring device of ore pulp

Technical field

The utility model belongs in the ore dressing industry device that concentration and granularity to ore pulp detect simultaneously.

Background technology

In the ore dressing industry, when ore was crushed to a certain degree, concentration and granularity had great influence to the economy of producing.Ore-dressing technique has the classic method of the concentration detection employing of ore pulp both at home and abroad: concentration kettle method, oven dry weight method, differential pressure method, gamma ray absorption process.Preceding two kinds of methods only limit to hand sampling and detect, and not only consuming time but also require great effort, human factor is many, and it is big to detect error, can not in time reflect the concentration situation of ore pulp, and are therefore little to the directive function of producing; Then two kinds of methods are harsh to detected ore pulp bar requirement, and bubble in the ore pulp or impurity will directly influence the precision of detection, therefore can not instruct production well.The equipment that uses in pulp granularity detects has, as Britain Ma Erwen laser particle size analyzer, ultrasonic particle-size analyzer all is to use indirect measurement method, and the daily servicing amount of equipment is big, for eliminating bubble, configuration defoaming device and two measuring head are so whole apparatus structure complexity used unsatisfactory, and this instrument costs an arm and a leg, and applicability and stability are difficult for meeting the demands.The PSI-200 piezoelectric ceramics particle-size analyzer of promoting the use of Outokumpu company in recent years gradually is the sreen analysis device of a kind of advanced person's the direct method of measurement, but its cost is higher, it adopts equation of linear regression work, the nominal data that requires is many, scope is wide, the data acquisition inconvenience of high-end and low side, workload is big; When the data of gathering have in limited time, linear equation define very big contingency, so just must have influence on the precision of detection; And it does not possess the function that detects concentration and two real-time parameters of granularity simultaneously.

Summary of the invention

Technical problem to be solved in the utility model provides the dense granularity on-line measuring device of a kind of ore pulp, can be online to concentration and granularity Detection, easy to use, maintenance is little, and measuring accuracy is higher, and the screening efficiency height is rational in infrastructure.

The design feature that realizes the pick-up unit that the utility model purpose is adopted is: at the cylindrical screen medial surface wedge-shape diversion bar is housed, sieve nest and motor shaft are in transmission connection, the sieve nest cavity is equipped with chute and pulp-entering pipe, sieve nest below dress fine sand bucket, another termination coarse sand bucket of chute, the run-down pipe at fine sand bucket and coarse sand bucket top is connected to water butt, and fine sand bucket, coarse sand bucket and water butt all are connected LOAD CELLS, and the signal end of each sensor connects central processing unit.The wedge-shape diversion strip that screen cloth is adorned for from the two ends of screen cloth face to the middle part purse up.LOAD CELLS adopts the stress-strain sensor of two above same polarity series connection.

Technique scheme of the present utility model can reach following technique effect:

(1) screen cloth of pick-up unit can arbitrarily be changed on demand and be fit to the order number, and can regularly introduce ore pulp from production line, therefore can measure the concentration and the granularity of ore pulp in time, be applicable to the online detection of selecting the dense granularity of factory's ore grinding (or classifier overflow), reach the purpose of automatic control, thereby the raising recovery rate in ore-dressing increases economic benefit.

(2) pick-up unit is simple in structure, and is easy to use, and operating personnel's workload is little, and maintenance is little, and wedge-shape diversion bar unique on the screen cloth helps producing eddy current in ore pulp, eliminates the ore pulp viscous force, and the screening efficiency of thick, thin ore particle is reached more than 99%.

(3) two above stress-strain sensor same polarity series connection are used, improve several times resolution, also reduced simultaneously enlargement factor, zero point drift, the requirement of temperature drift influences greatly its various electrical equipment undesired signals that are subjected to working environment and reduces, and the measuring accuracy error can reach ± and 0.5%, detect data and link to each other, help guaranteeing that the preceding operation of flotation is in rational state at any time with computer system.

(4) working position of screen cloth is immersed in the mode of moving in the liquid, can farthest reduce wearing and tearing and obstruction, and maintenance is reduced, and sieving area can maximize the use.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of the utility model sieve nest.

Each label is represented successively among the figure: water butt 1, LOAD CELLS 2, ore pulp funnel 3, sieve nest 4, motor 5, fine sand bucket 6, coarse sand bucket 7, run-down pipe 8, chute 9, pulp-entering pipe 10, wedge-shape diversion bar 11, back-up ring 12, screen cloth 13, screen frame (unit) 14.

Embodiment

Referring to Fig. 1, this device is mainly by sieve nest 4, motor 5, fine sand bucket 6, coarse sand bucket 7, water butt 1, LOAD CELLS 2 and computing machine (have promptly comprised central processing unit, do not draw) form, at columnar screen cloth 13 medial surfaces wedge-shape diversion bar 11 (see figure 2)s are housed, sieve nest 4 is connected with the through-drive of motor 5, the cavity of sieve nest 4 is equipped with chute 9 and pulp-entering pipe 10, sieve nest 4 belows dress fine sand bucket 6, the other end of chute 9 is connected to coarse sand bucket 7, the run-down pipe 8 at fine sand bucket 6 and coarse sand bucket 7 tops is connected to water butt 1, fine sand bucket 6, coarse sand bucket 7 all is being connected LOAD CELLS 2 with water butt 1, and the signal end of each sensor connects central processing unit.The wedge-shape diversion bar of being adorned on the screen cloth 13 11 shrinks (see figure 2) from the two ends of 13 of screen clothes to the middle part, and LOAD CELLS 2 has adopted the stress-strain sensor of two above same polarity series connection.

When detecting, the order number of the selected screen cloth 13 that is fit to, with fine sand bucket 6, all fill water in coarse sand bucket 7 and the water butt 1, and store Archimedes's buoyancy operational formula and corresponding program in the computing machine, on cylindrical screen 13, inject ore pulp by the period of determining from pulp-entering pipe 10, and keep sieve nest 4 bottoms to be immersed under the liquid level, in ore pulp, produce eddy current with rotary movement, enter fine sand bucket 6 precipitations of filling water under the fine-screen shaker, coarse sand on the sieve be subjected on the screen cloth 13 wedge-shape diversion bar 11 compile guide effect, come together in the position of central authorities, fall into chute 9 when turning to the top, be discharged to coarse sand bucket 7 precipitations of filling water again, the water that fine sand bucket 6 and coarse sand bucket 7 overflow is introduced in the water butt 1 by run-down pipe 8.Fine sand bucket 6, coarse sand bucket 7 and water butt 1 all are connected with LOAD CELLS 2, with each barrel weight electric signal of obtaining input central processing unit, use Archimedes's law of buoyancy, the weight of last period and this period is compared and computing, draw the concentration of the ore pulp of this period, and show and storage.The LOAD CELLS 2 of this device has adopted the stress-strain sensor of two above same polarity series connection, thereby can improve several times resolution, and accuracy of detection is improved greatly.

Claims

1, the dense granularity on-line measuring device of a kind of ore pulp, it is characterized in that: the wedge-shape diversion bar is housed at the cylindrical screen medial surface, sieve nest and motor shaft are in transmission connection, the sieve nest cavity is equipped with chute and pulp-entering pipe, sieve nest below dress fine sand bucket, another termination coarse sand bucket of chute, the run-down pipe at fine sand bucket and coarse sand bucket top is connected to water butt, fine sand bucket, coarse sand bucket and water butt all are connected LOAD CELLS, and the signal end of each sensor connects central processing unit.

2,, it is characterized in that by the dense granularity on-line measuring device of the described ore pulp of claim 1: the wedge-shape diversion strip that screen cloth is adorned for from the two ends of screen cloth face to the middle part purse up; LOAD CELLS adopts the stress-strain sensor of two above same polarity series connection.