CN113758549A - Method for rapidly measuring weight of flotation foam product - Google Patents
Method for rapidly measuring weight of flotation foam product Download PDFInfo
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- CN113758549A CN113758549A CN202111022857.XA CN202111022857A CN113758549A CN 113758549 A CN113758549 A CN 113758549A CN 202111022857 A CN202111022857 A CN 202111022857A CN 113758549 A CN113758549 A CN 113758549A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
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Abstract
The invention provides a method for rapidly measuring the weight of a flotation froth product, which comprises the following steps: step 0: according to the test protocol, the minimum value G of the weight of the foam product is presetsAnd maximum value GbG isb‑GsDividing the mixture into n weight ranges at equal intervals, measuring densities δ i of the n weight ranges, wherein i is 1 and 2 … n, and calculating an average density δ; step 1: during flotation, scraping the foam product into a sample receiving device with volume scales; step 2: weighing the weight M1 of the sample receiver in advance; and step 3: after finishing the flotation, reading the volume V of the ore pulp from the sample receiver, weighing the weight M2 of the sample receiver containing the ore pulp, and calculating the weight M of the ore pulp; and 4, step 4: calculating the weight m of the solid in the foam product; and 5: according to the m value range, adopt corresponding deltaiValue recalculation of the weight of solids m in the foam producti. In addition, the same ore, δiOnly one measurement is needed; if deltaiThe absolute value of the difference value with delta is less than 3-5%, and the steps are not required5. Compared with the conventional method, the method has the advantages of high measurement speed and efficiency and no change of the pulp form.
Description
Technical Field
The invention relates to the technical field of flotation tests, in particular to a method for quickly measuring the weight of a flotation foam product.
Background
The flotation test is an important means for judging the floatability of the ore, determining the proper conditions for the ore flotation and achieving the flotation indexes, and provides a basis for the design and construction of a dressing plant and the adjustment of the flotation production process. Flotation tests typically calculate product yield from the product weight of the floating froth and the product weight in the cell that does not float; analyzing the product to obtain the grade; and calculating the recovery rate according to the yield and the grade. It can be seen that the weight and grade of the flotation product are two important raw data for calculating the flotation test index. For the yield, generally, solid-liquid separation is carried out on the foam product and the product in the tank, and the yield is calculated after the solid phase is dried and weighed. Because the amount of raw ore is constant, the sum of the weight of the foam product and the weight of the product in the tank is a constant value, namely, if the weight of the foam product is measured, the yield can be calculated more accurately. For the grade, generally need to foam product and trough product solid-liquid separation, the solid phase is dried and weighed the assay analysis after to get, experienced technical staff can be according to the test phenomenon and the color, gloss of product, etc., judge the approximate grade. In the flotation test, reasonable yield is a necessary prerequisite for obtaining proper conditions and reasonable indexes of flotation. It follows that the foam product weight is an important technical parameter. The rapid acquisition of the froth product weight is an important prerequisite for effective adjustment of flotation conditions. The traditional method for obtaining the weight of the foam product comprises the following steps: 1) the foam product is a final product of a test, and a solid-liquid separation-drying-weighing method can be adopted; 2) the foam product is not a final product of the test, and needs to be further sorted, for example, the rough concentrate of flotation needs to be concentrated; the middlings of the closed-circuit test need to be returned for recleaning, and the middlings comprise scavenging foam and concentration tailings, namely products in a concentration tank. There are problems in that: 1) when the foam product is a final product of a test, the solid-liquid separation-drying-weighing method adopted is slow in speed and long in time consumption, cannot meet the effect of an instant adjusting condition, and is only used as an evaluation basis of a test effect; 2) when the foam product is not a final product of a test, the judgment of the amount generally only depends on estimation, the error is 50 percent and even exceeds 100 percent, more than half of the test is not suitable, so the test times are increased, such as a closed circuit test, the closed circuit is often carried out for 7-8 times, and the times are more if the foam product is multi-metal separation. Not only is the cost increased, but also much time and resources are wasted. The invention can quickly measure the weight of the solid material in the foam product, is convenient to operate, saves time and labor, does not change the shape and the property of ore pulp, and provides support for the adjustment of the flotation condition at any time.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention provides a method for quickly measuring the weight of a flotation froth product, compared with the conventional method, the method has the advantages of high speed, immediate measurement, no change of the form and the property of ore pulp, test efficiency improvement and effect improvement.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for rapidly measuring the weight of a flotation froth product comprising the steps of:
step 0: presetting the weight range G of the floating foam product according to the flotation test schemesAnd Gb，GsAt the minimum of the product weight range, GbFor the maximum value of the product weight range, the product weight range Gb-GsThe average is divided into n parts, the adjacent 2 parts are separated by J, J ═ Gb-Gs) N, i.e. Gb＝Gs+ nJ; j is one n times of weight range interval, n times of batch foam sweeping exploration tests are carried out, and the weight of the ith foam product is respectively positioned in [ Gs+(i-1)J]～(Gs+ iJ), i is 1, 2 … … n, when i is 1, 2 … …, n-1,n is G, the corresponding weight ranges are respectivelys～(Gs+J)、(Gs+J)～(Gs+2J)、……、[Gs+(n-2)J]～[Gs+(n-1)J]、[Gs+(n-1)J]～Gb. The density of n foam products was measured and filled into the table. Calculating an average density value delta, wherein delta is sigma delta i/n, delta i is the density of the foam product in the ith weight range, i is 1 and 2 … … n, the absolute value of the difference between a certain density and the average density is less than 3-5%, and the average density delta is adopted.
| [Gs+(i-1)J]～(Gs+iJ) | Gs～(Gs+J) | (Gs+J)～(Gs+2J) | …… | [Gs+(n-2)J]～[Gs+(n-1)J] | [Gs+(n-1)J]～Gb |
| δi | δ1 | δ2 | …… | δn-1 | δn |
| δiValue, g/cm3 |
Step 1: performing flotation according to a flotation test scheme, and scraping a flotation foam product into a sample receiving device with volume scales;
step 2: weighing the weight M1 of the sample receiver in advance;
and step 3: after the flotation is finished, reading the volume V of the ore pulp by the sample receiver; weighing the sample receiving weight M2 with the ore pulp, wherein the ore pulp weight M is as follows: M-M2-M1;
and 4, step 4: the weight m of solids in the foam product was calculated using the formula:
wherein m is the weight of solids in the foam product, g; delta is the density of the solids in the foam product, g/cm3I.e., g/ml; m foam product pulp weight, g; v, the volume of the foam product pulp is ml;
and 5: according to the range of step 0 in which the value m of the weight of the solids in the foamed product is within, the corresponding delta is usediValue recalculation of the weight m of solids in the foam producti
Step 6: according to the weight m of solids in the foamed productiAdjusting the test conditions;
density of solid material in same ore and foam productδiOnly one measurement is needed, namely, the step 0 is not needed in the next test; if a certain density deltaiThe absolute value of the difference value of the density delta and the average density delta is less than 3-5%, and the step 5 is not needed.
Furthermore, the sample receiver is a beaker, a conical flask or a measuring cylinder with volume scales, the size of the sample receiver is determined according to the weight or the volume of the foam product, and if the sample receiver is small in opening, a funnel can be added.
Further, the adjusting in step 5 includes: and if the weight of the product is less than the preset value, continuing adding chemicals for flotation until the weight of the product reaches the preset value, and stopping flotation. After the flotation is finished, if foam remains in the flotation tank, the addition amount of the collecting agent or the foaming agent can be reduced as required in the next test.
Compared with the prior art, the invention has the beneficial effects that:
1) when the foam product is a final product of a test, compared with the traditional solid-liquid separation-drying-weighing method, the method is convenient and fast (the drying generally needs longer time). The instant and fast measurement is beneficial to flexibly controlling the flotation condition. If the amount is not enough, continuing to scrape bubbles, and supplementing the medicament if the foam is not enough; sufficient, i.e. stopping the flotation;
2) when the foam product is not the final product of the test, the method does not change the form and the property of the product, so that the quantity of the foam product is mastered, and the subsequent selection is not influenced; for closed-circuit test, the concentration tailings are products in the tank, but the raw ore and the concentrate in the concentration operation are foam products, the method can simply calculate the amount of the concentration tailings, so that the ore amount in each closed-circuit test is mastered, the control and adjustment of conditions in the test process are facilitated, and the balance of the closed-circuit test amount is realized;
3) if the scraper, the foam guide or the sample receiver wall is attached with foam product, the foam product can be washed, and the washing water does not influence the final result value of the invention.
Detailed Description
The following describes in detail specific embodiments of the present invention.
A method for rapidly measuring the weight of a flotation froth product comprising the steps of:
step 0: presetting the weight range G of the floating foam product according to the flotation test schemesAnd Gb，GsAt the minimum of the product weight range, GbFor the maximum value of the product weight range, the product weight range Gb-GsThe average is divided into n parts, the adjacent 2 parts are separated by J, J ═ Gb-Gs) N, i.e. Gb＝Gs+ nJ; j is one n times of weight range interval, n times of batch foam sweeping exploration tests are carried out, and the weight of the ith foam product is respectively positioned in [ Gs+(i-1)J]～(Gs+ iJ), i is 1, 2 … … n, when i is 1, 2 … …, n-1, n, the corresponding weight ranges are G respectivelys～(Gs+J)、(Gs+J)～(Gs+2J)、……、[Gs+(n-2)J]～[Gs+(n-1)J]、[Gs+(n-1)J]～Gb. The density of n foam products was measured and filled into the table. Calculating an average density value delta, wherein delta is sigma delta i/n, delta i is the density of the foam product in the ith weight range, i is 1 and 2 … … n, the absolute value of the difference between a certain density and the average density is less than 3-5%, and the average density delta is adopted.
| [Gs+(i-1)J]～(Gs+iJ) | Gs～(Gs+J) | (Gs+J)～(Gs+2J) | …… | [Gs+(n-2)J]～[Gs+(n-1)J] | [Gs+(n-1)J]～Gb |
| δi | δ1 | δ2 | …… | δn-1 | δn |
| δiValue, g/cm3 |
Step 1: performing flotation according to a flotation test scheme, and scraping a flotation foam product into a sample receiving device with volume scales; the sample receiver, namely a sample receiver, can be a beaker, a conical flask or a measuring cylinder with volume scales, the size of the sample receiver is determined according to the weight or the volume of the foam product, and if the sample receiver is small, a funnel can be added;
step 2: weighing the weight M1 of the sample receiver in advance;
and step 3: after the flotation is finished, reading the volume V of the ore pulp by the sample receiver; weighing the sample receiving weight M2 with the ore pulp, wherein the ore pulp weight M is as follows: M-M2-M1;
and 4, step 4: the weight m of solids in the foam product was calculated using the formula:
wherein m is the weight of solids in the foam product, g; delta is the density of the solids in the foam product, g/cm3I.e., g/ml; m foam product pulp weight, g; v, the volume of the foam product pulp is ml;
and 5: according to the range of the step 0 in which the weight m value of the solid in the foam product is positioned, recalculating the weight m of the solid in the foam product by using the corresponding delta i valuei
Step 6: according to the weight m of solids in the foamed productiThe test conditions were adjusted. And if the weight of the product is less than the preset value, continuing adding chemicals for flotation until the weight of the product reaches the preset value, and stopping flotation. After the flotation is finished, if foam remains in the flotation tank, the addition amount of the collecting agent or the foaming agent can be reduced as required in the next test.
Density delta of solid material in the same ore and foam productiOnly one measurement is needed, namely, the step 0 is not needed in the next test; if a certain density deltaiThe absolute value of the difference value of the density delta and the average density delta is less than 3-5%, and the step 5 is not needed.
Example 1:
when the copper ore dressing foam product is measured, the error is 4.5 percent compared with the actual weight.
Example 2:
the foam of a certain magnesite subjected to a flotation test is measured, and the error is 3.2 percent compared with the actual weight
Compared with the conventional method, the method has the advantages of high speed, immediate measurement, no change of the form and the property of the ore pulp, test efficiency improvement and effect improvement.
1) When the foam product is a final product of a test, compared with the traditional solid-liquid separation-drying-weighing method, the method is convenient and fast (the drying generally needs longer time). The instant and fast measurement is beneficial to flexibly controlling the flotation condition. If the amount is not enough, continuing to scrape bubbles, and supplementing the medicament if the foam is not enough; sufficient, i.e. stopping the flotation;
2) when the foam product is not the final product of the test, the method does not change the form and the property of the product, so that the quantity of the foam product is mastered, and the subsequent selection is not influenced; for closed-circuit test, the concentration tailings are products in the tank, but the raw ore and the concentrate in the concentration operation are foam products, the method can simply calculate the amount of the concentration tailings, so that the ore amount in each closed-circuit test is mastered, the control and adjustment of conditions in the test process are facilitated, and the balance of the closed-circuit test amount is realized;
3) if the scraper, the foam guide or the sample receiver wall is attached with foam product, the foam product can be washed, and the washing water does not influence the final result value of the invention.
The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (3)
1. A method for rapidly measuring the weight of a flotation froth product, comprising the steps of:
step 0: presetting the weight range G of the floating foam product according to the flotation test schemesAnd Gb，GsAt the minimum of the product weight range, GbFor the maximum value of the product weight range, the product weight range Gb-GsThe average is divided into n parts, the adjacent 2 parts are separated by J, J ═ Gb-Gs) N, i.e. Gb＝Gs+ nJ; j is one n times of weight range interval, n times of batch foam sweeping exploration tests are carried out, and the weight of the ith foam product is respectively positioned in [ Gs+(i-1)J]～(Gs+ iJ), i is 1, 2 … … n, when i is 1, 2 … …, n-1, n, the corresponding weight ranges are G respectivelys～(Gs+J)、(Gs+J)～(Gs+2J)、……、[Gs+(n-2)J]～[Gs+(n-1)J]、[Gs+(n-1)J]～Gb(ii) a Measuring the density of n foam products and filling the density into a table; calculating the average density value delta, delta sigma delta i/n,δ i is the density of the foam product in the ith weight range, i is 1, 2 … … n, the absolute value of the difference between a certain density and the average density is less than 3-5%, and the average density δ is adopted;
step 1: performing flotation according to a flotation test scheme, and scraping a flotation foam product into a sample receiving device with volume scales; the sample receiver, namely a sample receiver, can be a beaker, a conical flask or a measuring cylinder with volume scales, the size of the sample receiver is determined according to the weight or the volume of the foam product, and if the sample receiver is small, a funnel can be added;
step 2: weighing the weight M1 of the sample receiver in advance;
and step 3: after the flotation is finished, reading the volume V of the ore pulp by the sample receiver; weighing the sample receiving weight M2 with the ore pulp, wherein the ore pulp weight M is as follows: M-M2-M1;
and 4, step 4: the weight m of solids in the foam product was calculated using the formula:
wherein m is the weight of solids in the foam product, g; delta is the density of the solids in the foam product, g/cm3I.e., g/ml; m foam product pulp weight, g; v, the volume of the foam product pulp is ml;
and 5: according to the range of the step 0 in which the weight m value of the solid in the foam product is positioned, recalculating the weight m of the solid in the foam product by using the corresponding delta i valuei
Step 6: according to the weight m of solids in the foamed productiAdjusting the test conditions;
density delta of solid material in the same ore and foam productiOnly one measurement is needed, namely, the step 0 is not needed in the next test; if a certain density deltaiThe absolute value of the difference value of the density delta and the average density delta is less than 3-5%, and the step 5 is not needed.
2. A method as claimed in claim 1, wherein the sample receiver is a beaker, flask or graduated cylinder having volumetric scales, and the size of the sample receiver is determined by the weight or volume of the froth product, and if the sample receiver is small, a funnel can be added.
3. A method for rapid measurement of the weight of a flotation froth product according to claim 1 wherein said adjustment in step 5 comprises: if the weight of the product is less than the preset value, continuing to add chemicals for flotation until the weight of the product reaches the preset value, and stopping flotation; after the flotation is finished, if foam remains in the cell, the addition amount of the collecting agent or the foaming agent can be reduced as required in the next test.
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