CN104101409B - Online detection method for ore storage amount of thickener - Google Patents

Abstract

The invention discloses an online detection method for ore storage amount of a thickener, which comprises the following steps: fitting a bottom pressure distribution curve of the thickener according to a group of pressure values p measured by the pressure sensor, and thus obtaining a steady-state equivalent dry ore height function of any point at the bottom of the thickener; according to a relational expression between the distance between each pressure sensor and the overflow water surface and the horizontal distance between the installation position of each pressure sensor and the central axis of the thickener, the steady-state equivalent dry ore height function of any point at the bottom of the thickener is transformed to obtain the transformed steady-state equivalent dry ore height function of any point at the bottom of the thickener; and performing integral operation along the radial direction of the thickener by using the transformed steady-state equivalent dry ore height function of any point at the bottom of the thickener to calculate the ore storage amount in the whole thickener. By adopting the method disclosed by the invention, the cost of long-term manual sampling is saved, the probability of production accidents such as rake pressing and the like caused by overload of equipment load is reduced, and the operation efficiency of the thickener is improved.

Description

A kind of concentrator stores up the online test method of ore deposit amount

Technical field

The present invention relates to mining and metallurgy technology field, more particularly, to a kind of online test method of concentrator storage ore deposit amount.

Background technology

As important selecting and purchasing equipment, at home and abroad the industry such as coal, environmental protection, metallurgy, chemical industry obtains widely should concentrator With it is a kind of thickening equipment of continuous work, is mainly used in the concentration of concentrate mine tailing in ore-dressing practice, industrial wastewater The operations such as clarification, the countercurrent washing of hydrometallurgy.

Because dense machine equipment itself is bulky, on-line checking is not carried out to the ore deposit amount of its storage inside at present Correlation technique, is that ore dressing plant metal balance calculating brings very big puzzlement.Meanwhile, during concentrator operation, The pressure rake accident causing because its load is excessive can occur often.

Content of the invention

It is an object of the invention to provide a kind of concentrator stores up the online test method of ore deposit amount, save long-term manual sampling Cost, reduces the production accident odds such as the pressure rake that machine utilization overload causes, improves concentrator operational efficiency.

The purpose of the present invention is achieved through the following technical solutions:

A kind of concentrator stores up the online test method of ore deposit amount, and the method includes:

According to one group of pressure values p being arranged on dense motor spindle and radially distributed pressure sensor is measured, to intend Close concentrator base pressure distribution curve, and the steady-state equivalent obtaining described dense motor spindle arbitrfary point with this does ore deposit height letter Number；

The level away from concentrator central axis for the distance and its installation place according to each pressure sensor and the overflow water surface away from From between relational expression, ore deposit height function is done to the steady-state equivalent of described dense motor spindle arbitrfary point and enters line translation, obtain conversion The steady-state equivalent of dense motor spindle arbitrfary point afterwards does ore deposit height function；

Do ore deposit height function using the steady-state equivalent of the dense motor spindle arbitrfary point after described conversion to enter along concentrator radial direction Row integral operation, to calculate the Chu Kuangliang in whole concentrator.

As seen from the above technical solution provided by the invention, concentrator can accurately be calculated by such scheme Internal Chu Kuangliang, the reference that its output valve both can calculate as ore dressing plant metal balance, save the one-tenth of long-term manual sampling This, the foundation that again can automatically control as thickener underflow, reduces machine utilization and transships the pressure rake causing and run mixed etc. production Accident odds, improves concentrator production efficiency.

Brief description

In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be to required use in embodiment description Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this For the those of ordinary skill in field, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings Accompanying drawing.

Fig. 1 is the workflow of the online test method that a kind of concentrator that embodiments of the invention one provide stores up ore deposit amount Figure；

Fig. 2 is the workflow of the online test method that a kind of concentrator that embodiments of the invention two provide stores up ore deposit amount Figure；

Fig. 3 is the concentrator vertical section dimensional parameters mark figure that embodiments of the invention two provide；

Fig. 4 is that the concentrator base pressure that embodiments of the invention two provide vertically is mapped to horizontal disc schematic diagram；

Fig. 5 is that applicable cases schematic diagram installed by the concentrator base pressure sensor that embodiments of the invention two provide；

Fig. 6 is the concentrator base pressure distribution curve matching schematic diagram that embodiments of the invention two provide.

Specific embodiment

With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Ground description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on this Inventive embodiment, the every other enforcement that those of ordinary skill in the art are obtained under the premise of not making creative work Example, broadly falls into protection scope of the present invention.

Embodiment one

Fig. 1 is the workflow diagram of the online test method that the concentrator that embodiments of the invention one provide stores up ore deposit amount.As Shown in Fig. 1, the method mainly comprises the steps:

Step 11, basis are arranged on one group of pressure values that dense motor spindle and radially distributed pressure sensor are measured P, carrys out matching concentrator base pressure distribution curve, and the steady-state equivalent obtaining described dense motor spindle arbitrfary point with this does ore deposit height Degree function.

In the embodiment of the present invention, described dense motor spindle is rendered as the shape of a cone, and its internal all ore pulp produces Gravity converge on the conical surface of dense motor spindle, therefore dense motor spindle arbitrfary point refers to be exactly the arbitrfary point on the conical surface.

Step 12, the distance according to each pressure sensor and the overflow water surface and its installation place are away from concentrator central axis Relational expression between horizontal range, enters line translation to the dry ore deposit height function of steady-state equivalent of described dense motor spindle arbitrfary point, obtains The steady-state equivalent of the dense motor spindle arbitrfary point after must converting does ore deposit height function.

Step 13, using described conversion after dense motor spindle arbitrfary point steady-state equivalent do ore deposit height function along concentrator Radially it is integrated computing, to calculate the Chu Kuangliang in whole concentrator.

The embodiment of the present invention can accurately calculate the Chu Kuangliang within concentrator, and its output valve both can be used as ore dressing The reference that factory metal balance calculates, saves the cost of long-term manual sampling, again can as thickener underflow automatically control according to According to the production accident odds such as mixed, raising concentrator production efficiency are harrowed and run to the pressure that reduction machine utilization overload causes.

Embodiment two

For the ease of understanding the present invention, the present invention will be further described for 2-6 below in conjunction with the accompanying drawings.

As shown in Fig. 2 the invention mainly comprises the following steps:

Step 21, acquisition are arranged on one group of pressure that dense motor spindle and radially distributed pressure sensor are measured Value, and the distance of each pressure sensor and the overflow water surface.

In the embodiment of the present invention, the one group of pressure values being measured are represented by p={ p₁,p₂,p₃,…,p_n, accordingly often One pressure sensor is represented by h={ h with the distance of the overflow water surface₁,h₂,h₃,…,h_n,}；Wherein, n represents pressure sensor Number, and n >=3.In addition, pressure unit can be MPa (mpa) in the embodiment of the present invention, long measure can be rice (m).

Simultaneously it may be determined that each pressure sensor and the overflow water surface are apart from h_kAnd its installation place is away from concentrator central axis Horizontal range r_kBetween relational expression, (1≤k≤n).

Specifically, from the structure of dense machine equipment, dense motor spindle is in cone shape, and its overall vertical section is such as Shown in Fig. 3, in k-th pressure sensor installation place horizontal range r away from concentrator central axis_kWith its away from the overflow water surface away from From h_kMeet following relation:

$\frac{h-h_k}{h-h_0}=\frac{r_k}{r};$

Wherein, h represents that the distance of the overflow water surface is arrived in dense motor spindle bosom (i.e. conical tip), and r represents concentrator Radius, h₀Represent the height of concentrator top cylinder part；

Above formula can be rewritten as:

$h_k=h-\frac{r_k\·(h-h_0)}{r}.$

Step 22, matching concentrator base pressure distribution curve.

In the embodiment of the present invention, the parameter being obtained based on step 21 is in conjunction with least square method come the dense motor spindle of matching Pressure distribution curve p=f (h)=a₁+a₂h+a₃h²In coefficient a₁, a₂And a₃, that is, obtain the regression relation of p=f (h).

Specifically, first, list the error equation of n sample point:

$\left\{\begin{array}{c}{v}_1=p_1-(a_1+a_2{h}_1+a_3{h_1}^2)\\ v_2=p_2-(a_1+a_2{h}_2+a_3{h_2}^2)\\ ......\\ v_n=p_n-(a_1+a_2{h}_n+a_3{h_n}^2)\end{array}\right.;$

Again equation group is expressed in matrix as:

$v=p-\hat{h}\·a;$

Wherein,

$v=\left[\begin{array}{c}{v}_1\\ v_2\\ ...\\ v_n\end{array}\right];p=\left[\begin{array}{c}{p}_1\\ p_2\\ ...\\ p_n\end{array}\right];\hat{h}=\left[\begin{array}{ccc}1& h_1& {h_1}^2\\ 1& h_2& {h_2}^2\\ & ...& \\ 1& h_n& {h_n}^2\end{array}\right];a=\left[\begin{array}{c}{a}_1\\ a_2\\ a_3\end{array}\right];$

Obtain the solution of matrix form:

$a={\left({\hat{h}}^t\hat{h}\right)}^{-1}{\hat{h}}^{t}p;$

Thus obtaining concentrator base pressure distribution curve p=f (h):

P=a₁+a₂h+a₃h².

Step 23, the steady-state equivalent of the described dense motor spindle arbitrfary point of acquisition do ore deposit height function.

According to conservation of mass theorem, in stable state, the pressure p recording of k-th pressure sensor installed position_kMeet Relation:

10⁶·p_kS=10³·ρ_Water·h_{K water}·s·g+10³·ρ_{Dry ore deposit}·h_{K does ore deposit}·s·g；

h_k=h_{K water}+h_{K does ore deposit}；

Wherein, h_{K does ore deposit}And h_{K water}The dry ore deposit height settling at this during expression stable state respectively and the height of water, ρ_{Dry ore deposit}And ρ_WaterTable respectively Show density (unit g/cm of Gan Kuang and water³, for known definite value), s represents cross-sectional area, and g=9.8n/kg, from above two formulas Can obtain:

Concentrator base pressure distribution curve in step 22 is brought into above-mentioned replacement p_k, obtain described dense motor spindle any The dry ore deposit height function of the steady-state equivalent of point (being h apart from spillwag chute distance):

Step 24, the steady-state equivalent to described dense motor spindle arbitrfary point are done ore deposit height function and are entered line translation, obtain conversion The steady-state equivalent of dense motor spindle arbitrfary point afterwards does ore deposit height function.

By the result of step 23 and h_kAnd r_kRelational expressionCombine, then have:

Step 25, using described conversion after dense motor spindle arbitrfary point steady-state equivalent do ore deposit height function along concentrator Radially it is integrated computing, to calculate the Chu Kuangliang in whole concentrator.

Specifically, the embodiment of the present invention is that the pressure of each point of dense motor spindle is vertically mapped in plane, such as Fig. 4 Shown.Because the pressure of the point on each concentric circles in this plane should be equal, concentrator is hung down along each concentric circles After straight segmentation, do ore deposit height function h using the steady-state equivalent that step 24 obtains_{Dry ore deposit}=f₁R () is integrated along concentrator radial direction, Storage ore deposit amount m in whole concentrator can be calculated_{Dry ore deposit}(unit ton), its formula is:

Exemplary, below by specific example concentrator of the present invention storage ore deposit amount online test method is made into One step explanation, using the bulk flotation concentrate concentrator of certain gold refinery as objective for implementation.In conjunction with on-site actual situations, dense Close motor spindle is mounted with that 5 pressure sensors are used for obtaining its online pressure values, as shown in figure 5, and obtaining setting shown in table 1 Standby and technique relevant parameter:

Table 1 equipment and technique relevant parameter

The on-line checking value choosing a certain 5 pressure sensors of moment carries out the matching of concentrator base pressure distribution curve Calculate, pressure on-line checking value is as shown in table 2.

Table 2 pressure on-line checking value

The fitting result of concentrator base pressure distribution curve is:

P=a₁+a₂h+a₃h²=0.0029+0.0072h+0.0006h²

Matched curve is as shown in Figure 6.

Take π=3.14159, g=9.8n/kg, a₁=0.0029, a₂=0.0072, a₃=0.0006 substitution calculating formula can obtain In concentrator Chu Kuangliang: m_{Dry ore deposit}=1857.9 tons.

This result complies fully with the actual conditions that live metal balance calculates, and meets thickener underflow and automatically control Demand, application effect is good.

The embodiment of the present invention can accurately calculate the Chu Kuangliang within concentrator, and its output valve both can be used as ore dressing The reference that factory metal balance calculates, saves the cost of long-term manual sampling, again can as thickener underflow automatically control according to According to the production accident odds such as mixed, raising concentrator production efficiency are harrowed and run to the pressure that reduction machine utilization overload causes.

Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment can To be realized by software it is also possible to realize in the way of by software plus necessary general hardware platform.Based on such understanding, The technical scheme of above-described embodiment can be embodied in the form of software product, this software product can be stored in one non-easily The property lost storage medium (can be cd-rom, u disk, portable hard drive etc.) in, including some instructions with so that a computer sets Standby (can be personal computer, server, or network equipment etc.) executes the method described in each embodiment of the present invention.

The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto, Any those familiar with the art in the technical scope of present disclosure, the change or replacement that can readily occur in, All should be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims Enclose and be defined.

Claims (5)

1. a kind of concentrator stores up the online test method of ore deposit amount it is characterised in that the method includes:

According to one group of pressure values p being arranged on dense motor spindle and radially distributed pressure sensor is measured, carry out matching dense Close motor spindle pressure distribution curve, and the steady-state equivalent obtaining described dense motor spindle arbitrfary point with this does ore deposit height function；

The horizontal range away from concentrator central axis for the distance and its installation place according to each pressure sensor and the overflow water surface it Between relational expression, ore deposit height function is done to the steady-state equivalent of described dense motor spindle arbitrfary point and enters line translation, after obtaining conversion The steady-state equivalent of dense motor spindle arbitrfary point does ore deposit height function；

Do ore deposit height function using the steady-state equivalent of the dense motor spindle arbitrfary point after described conversion to be amassed along concentrator radial direction Partite transport is calculated, and to calculate the Chu Kuangliang in whole concentrator；

Wherein, using least square method come matching concentrator base pressure distribution curve p=f (h)=a₁+a₂h+a₃h²In coefficient a₁, a₂And a₃, that is, obtain the regression relation of p=f (h)；Its step is as follows:

List the error equation of n sample point:

$\left\{\begin{array}{c}{v}_1=p_1-(a_1+a_2{h}_1+a_3{h_1}^2)\\ v_2=p_2-(a_1+a_2{h}_2+a_3{h_2}^2)\\ ......\\ v_n=p_n-(a_1+a_2{h}_n+a_3{h_n}^2)\end{array}\right.;$

Again equation group is expressed in matrix as:

$v=p-\hat{h}\·a;$

Wherein,

Obtain the solution of matrix form:

$a={\left({\hat{h}}^t\hat{h}\right)}^{-1}{\hat{h}}^{t}p;$

Thus obtaining concentrator base pressure distribution curve p=f (h):

P=a₁+a₂h+a₃h².

2. online test method according to claim 1 is it is characterised in that the method also includes:

Obtain and be arranged on one group of pressure values p={ p that dense motor spindle and radially distributed pressure sensor are measured₁,p₂, p₃,…,p_n, and each pressure sensor and the overflow water surface apart from h={ h₁,h₂,h₃,…,h_n,}；

Wherein, n represents the number of pressure sensor, and n >=3.

3. online test method according to claim 1 is it is characterised in that the described dense motor spindle arbitrfary point of described acquisition Steady-state equivalent do ore deposit height function include:

According to conservation of mass theorem, in stable state, the pressure p recording of k-th pressure sensor installed position_kMeet relation:

Wherein, h_kRepresent the distance of k-th pressure sensor and the overflow water surface, h_{K does ore deposit}And h_{K water}Settle at this when representing stable state respectively Dry ore deposit height and water height, ρ_{Dry ore deposit}And ρ_WaterRepresent the density of Gan Kuang and water respectively；

Concentrator base pressure distribution curve is brought into above-mentioned replacement p_k, obtain the steady-state equivalent of described dense motor spindle arbitrfary point Dry ore deposit height function:

4. online test method according to claim 3 is it is characterised in that obtain the dense motor spindle arbitrfary point after conversion Steady-state equivalent do ore deposit height function include:

Between the distance of each pressure sensor and the overflow water surface and its installation place horizontal range away from concentrator central axis Relational expression is:

$h_k=h-\frac{r_k\·(h-h_0)}{r};$

Wherein, h represents dense motor spindle bosom to the distance of the overflow water surface, and r represents the radius of concentrator, h₀Represent concentrator The height of top cylinder part, r_kRepresent k-th pressure sensor installation place horizontal range away from concentrator central axis；

The steady-state equivalent that above-mentioned relation formula is brought into described dense motor spindle arbitrfary point is done in ore deposit height function and is entered line translation, obtains The dry ore deposit height function of the steady-state equivalent of the dense motor spindle arbitrfary point after conversion:

5. the online test method according to claim 1 or 4 is it is characterised in that calculate the Chu Kuangliang in whole concentrator Computing formula include: