CN113758549B - 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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- CN113758549B CN113758549B CN202111022857.XA CN202111022857A CN113758549B CN 113758549 B CN113758549 B CN 113758549B CN 202111022857 A CN202111022857 A CN 202111022857A CN 113758549 B CN113758549 B CN 113758549B
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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
-
- 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
Abstract
The invention provides a method for rapidly measuring the weight of a flotation foam product, which comprises the following steps: step 0: the minimum value G of the foam product weight is preset according to the test scheme s And maximum value G b Will G b ‑G s Dividing the mixture into n weight ranges with equal intervals, measuring densities delta i of the weights of the n ranges, wherein i=1 and 2 … n, and calculating average density delta; step 1: during flotation, scraping the foam product into a sample collector with volume scales; step 2: pre-weighing the weight M1 of the sample collector; step 3: after flotation is finished, reading the pulp volume V from the sample collector, weighing the sample collector weight M2 for loading the pulp, and calculating the pulp weight M; step 4: calculating the weight m of solids in the foam product; step 5: based on the m value range, adopting corresponding delta i Value recalculating solids weight m in foam product i . In addition, the same ore, delta i Only one measurement is needed; if delta i The absolute value of the delta difference value is less than 3-5%, and step 5 is not needed. Compared with the conventional method, the method has the advantages of quick and efficient measurement and no change of the pulp morphology.
Description
Technical Field
The invention relates to the technical field of flotation tests, in particular to a method for rapidly 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 condition of ore flotation and reaching the flotation index, and provides a basis for the design and construction of a concentrating mill and the adjustment of the flotation production process. Flotation tests generally calculate product yield from the product weight of the froth that floats up and the product weight in the tank that does not float up; analyzing the product by assay to obtain grade; and calculating the recovery rate from 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, solid-liquid separation is generally required for the foam product and the product in the tank, and the yield is calculated after solid phase drying and weighing. Because the raw ore quantity is fixed, the sum of the weights of the foam product and the products in the tank is a fixed value, namely if the weight of the foam product is measured, the yield can be calculated more accurately. For the grade, solid-liquid separation is generally needed for the foam products and the products in the tank, the solid-phase drying and weighing are carried out, and then the products are subjected to assay analysis, so that the experienced technicians can judge the approximate grade according to the test phenomenon, the color, the luster and the like of the products. In the flotation test, reasonable yield is a necessary precondition for obtaining reasonable indexes of proper conditions and flotation. It follows that foam product weight is an important technical parameter. The rapid acquisition of the froth product weight is an important precondition for effective adjustment of flotation conditions. The traditional methods for obtaining the weight of the foam product are: 1) The foam product is the final product of the test, and a solid-liquid separation-drying-weighing method can be adopted; 2) The froth product is not the final test product and is further classified, for example, the flotation of the coarse concentrate is selected; middlings of the closed circuit test need to be returned for recleaning, and the middlings comprise scavenging foam and concentrating tailings, namely products in a concentrating tank. The problems are: 1) When the foam product is the final product of the test, the adopted solid-liquid separation-drying-weighing method has low existence speed and long time consumption, can not meet the effect of the instant regulation condition, and is only used as the evaluation basis of the test effect; 2) When the foam product is not the final product of the test, the judgment of the quantity can be generally only estimated, the error is 50 percent, even more than 100 percent, and more than half of the test factors are unsuitable, so that the test times, such as closed-circuit tests, are increased, the closed-circuit is often carried out for 7 to 8 times, and if the multi-metal separation is carried out, the times are more. Not only causes the cost to increase, but also wastes much time and resources. The invention can rapidly measure the weight of solid materials 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 flotation conditions at any time.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention provides the method for rapidly measuring the weight of the flotation foam product, which has high speed compared with the conventional method, is equivalent to instant measurement, does not change the shape and the property of ore pulp, and can improve the test efficiency and the effect.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
a method for rapidly measuring the weight of a flotation froth product comprising the steps of:
step 0: according to a flotation test scheme, presetting the weight range G of an upward floating foam product s And G b ，G s For minimum product weight range, G b For maximum product weight range, product weight range G b -G s Equally divided into n parts, the weight intervals of adjacent 2 parts are J, J= (G) b -G s ) N, i.e. G b ＝G s +nJ; j is one-n of the weight range interval, n batch foam sweep exploration tests are performed to locate the ith foam product weight at [ G s +(i-1)J]～(G s +ij), i is 1, 2 … … n, when i is 1, 2 … …, n-1, n, the corresponding weight ranges are G respectively s ～(G s +J)、(G s +J)～(G s +2J)、……、[G s +(n-2)J]～[G s +(n-1)J]、[G s +(n-1)J]～G b . The density of n foam products was measured and filled in the table. Calculating the average density value delta, delta-sigma delta i/n, delta i being the density of the foam product in the ith weight range, i being 1, 2 … … n, a certain densityThe absolute value of the difference from the average density is less than 3-5%, and the average density delta is adopted.
| [G s +(i-1)J]～(G s +iJ) | G s ～(G s +J) | (G s +J)～(G s +2J) | …… | [G s +(n-2)J]～[G s +(n-1)J] | [G s +(n-1)J]～G b |
| δ i | δ 1 | δ 2 | …… | δ n-1 | δ n |
| δ i Value, g/cm 3 |
Step 1: carrying out flotation according to a flotation test scheme, and scraping a flotation foam product into a sample collector with volume scales;
step 2: pre-weighing the weight M1 of the sample collector;
step 3: after the flotation is finished, reading the volume V of the ore pulp by the sample collector; weighing the sample receiving weight M2 filled with ore pulp, wherein the ore pulp weight M is as follows: m=m2-M1;
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 solids in the foam product, g/cm 3 I.e. g/ml; m weight of pulp of foam product, g; v the volume of the foam product pulp, ml;
step 5: based on the range in step 0 where the weight m of solids in the foam product is within, a corresponding delta is employed i Value recalculating weight of solids in foam product, m i
Step 6: based on the weight m of solids in the foam product i Adjusting the test conditions;
density delta of solid material in foam product for same ore i The measurement is only needed once, namely, the next time of test is carried out, and the step 0 is not needed; if a certain density delta i The absolute value of the delta difference value with the average density is less than 3-5%, and step 5 is not needed.
Further, the sample collector is a beaker, a conical flask or a measuring cylinder with volume scales, the size of the sample collector is determined according to the weight or the volume of a foam product, and if the sample collector is small in mouth, a funnel can be added.
Further, the adjusting in step 5 includes: if the product weight is smaller than the preset value, continuing to charge the flotation until the product weight reaches the preset value, and stopping the flotation. After the flotation is finished, if foam residues still remain in the flotation tank, the addition amount of the collecting agent or the foaming agent can be reduced as appropriate in the next test.
Compared with the prior art, the invention has the beneficial effects that:
1) When the foam product is the final product of the test, the method is convenient and quick (generally requires longer drying time) compared with the traditional solid-liquid separation-drying-weighing method. The instant and rapid measurement is beneficial to flexibly controlling the flotation condition. The foam is scraped continuously when the amount is insufficient, the foam is insufficient, and the medicament is added; the amount is enough, namely the floatation is stopped;
2) When the foam product is not a final test product, the method not only grasps the quantity of the foam product, but also does not influence the subsequent sorting because the shape and the property of the product are not changed; for the closed circuit test, the tailings are products in the tank, but the raw ores and the concentrates of the concentration operation are foam products, the method can simply calculate the quantity of the tailings, thereby grasping the quantity of each middling in the closed circuit test, being beneficial to the control and adjustment of conditions in the test process and realizing the balance of the quantity of the closed circuit test;
3) If the scraper, foam channel or the walls of the sample collector are attached with foam product, the foam product can be washed, and the washing water does not affect the final result value of the invention.
Detailed Description
The following provides a detailed description of embodiments of the present invention.
A method for rapidly measuring the weight of a flotation froth product comprising the steps of:
step 0: according to a flotation test scheme, presetting the weight range G of an upward floating foam product s And G b ，G s For minimum product weight range, G b For maximum product weight range, product weight range G b -G s Equally divided into n parts, the weight intervals of adjacent 2 parts are J, J= (G) b -G s ) N, i.e. G b ＝G s +nJ; j is one-n of the weight range interval, n batch foam sweep exploration tests are performed to locate the ith foam product weight at [ G s +(i-1)J]～(G s +ij), i is 1, 2 … … n, when i is 1, 2 … …, n-1, n, the corresponding weight ranges are G respectively s ～(G s +J)、(G s +J)～(G s +2J)、……、[G s +(n-2)J]～[G s +(n-1)J]、[G s +(n-1)J]～G b . The density of n foam products was measured and filled in the table. And calculating an average density value delta, delta-sigma delta i/n, wherein 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.
| [G s +(i-1)J]～(G s +iJ) | G s ～(G s +J) | (G s +J)～(G s +2J) | …… | [G s +(n-2)J]～[G s +(n-1)J] | [G s +(n-1)J]～G b |
| δ i | δ 1 | δ 2 | …… | δ n-1 | δ n |
| δ i Value, g/cm 3 |
Step 1: carrying out flotation according to a flotation test scheme, and scraping a flotation foam product into a sample collector with volume scales; the sample collector can be a beaker, a conical flask or a measuring cylinder with volume scales, the size of the sample collector is determined according to the weight or the volume of a foam product, and if a sample collecting port is small, a funnel can be added;
step 2: pre-weighing the weight M1 of the sample collector;
step 3: after the flotation is finished, reading the volume V of the ore pulp by the sample collector; weighing the sample receiving weight M2 filled with ore pulp, wherein the ore pulp weight M is as follows: m=m2-M1;
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 solids in the foam product, g/cm 3 I.e. g/ml; m weight of pulp of foam product, g; v the volume of the foam product pulp, ml;
step 5: recalculating the weight m of solids in the foam product using the corresponding δi values based on the range in step 0 where the weight m of solids in the foam product is located i
Step 6: based on the weight m of solids in the foam product i The test conditions were adjusted. If the product weight is smaller than the preset value, continuing to charge the flotation until the product weight reaches the preset value, and stopping the flotation. After the flotation is finished, if foam residues still remain in the flotation tank, the addition amount of the collecting agent or the foaming agent can be reduced as appropriate in the next test.
Density delta of solid material in foam product for same ore i The measurement is only needed once, namely, the next time of test is carried out, and the step 0 is not needed; if a certain density delta i The absolute value of the delta difference value with the average density is less than 3-5%, and step 5 is not needed.
Example 1:
the measurement of a certain copper ore dressing foam product is carried out, and the error is 4.5% compared with the actual weight.
Example 2:
the flotation test foam of a magnesite is measured, and the error of the test foam is 3.2 percent compared with the actual weight
Compared with the conventional method, the method has high speed, is equivalent to instant measurement, does not change the shape and the property of ore pulp, and can improve the test efficiency and the effect.
1) When the foam product is the final product of the test, the method is convenient and quick (generally requires longer drying time) compared with the traditional solid-liquid separation-drying-weighing method. The instant and rapid measurement is beneficial to flexibly controlling the flotation condition. The foam is scraped continuously when the amount is insufficient, the foam is insufficient, and the medicament is added; the amount is enough, namely the floatation is stopped;
2) When the foam product is not a final test product, the method not only grasps the quantity of the foam product, but also does not influence the subsequent sorting because the shape and the property of the product are not changed; for the closed circuit test, the tailings are products in the tank, but the raw ores and the concentrates of the concentration operation are foam products, the method can simply calculate the quantity of the tailings, thereby grasping the quantity of each middling in the closed circuit test, being beneficial to the control and adjustment of conditions in the test process and realizing the balance of the quantity of the closed circuit test;
3) If the scraper, foam channel or the walls of the sample collector are attached with foam product, the foam product can be washed, and the washing water does not affect the final result value of the invention.
The above examples are implemented on the premise of the technical scheme of the present invention, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the above examples. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (2)
1. A method for rapidly measuring the weight of a flotation froth product, comprising the steps of:
step 0: according to a flotation test scheme, presetting the weight range G of an upward floating foam product s And G b ，G s For minimum product weight range, G b For maximum product weight range, product weight range G b -G s Equally divided into n parts, the weight intervals of adjacent 2 parts are J, J= (G) b -G s ) N, i.e. G b ＝G s +nJ; j is one-n of the weight range interval, n batch foam sweep exploration tests are performed to locate the ith foam product weight at [ G s +(i-1)J]～(G s +ij), i is 1, 2 … … n, when i is 1, 2 … …, n-1, n, the corresponding weight ranges are G respectively s ～(G s +J)、(G s +J)～(G s +2J)、……、[G s +(n-2)J]～[G s +(n-1)J]、[G s +(n-1)J]～G b The method comprises the steps of carrying out a first treatment on the surface of the 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 of the foam product, wherein delta i is the density of the foam product in the ith weight range, i is 1 and 2 … … n, and if the absolute value of the difference between the density delta i of the foam product in the ith weight range and the average density delta of the foam product is less than 3-5%, adopting the average density delta of the foam product;
step 1: carrying out flotation according to a flotation test scheme, and scraping a flotation foam product into a sample collector with volume scales; 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 a foam product, and if a sample receiving port is small, a funnel is added;
step 2: pre-weighing the weight M1 of the sample collector;
step 3: after the flotation is finished, reading the volume V of the ore pulp by the sample collector; weighing the sample receiving weight M2 filled with ore pulp, wherein the ore pulp weight M is as follows: m=m2-M1;
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 average density, g/cm, of the foam product 3 I.e. g/ml; m is the weight of ore pulp of the foam product, g; v is the volume of the foam product ore pulp, ml;
step 5: recalculating the weight m of solids in the foam product using the corresponding δi values based on the range in step 0 where the weight m of solids in the foam product is located i
Step 6: based on the weight m of solids in the foam product i Adjusting the test conditions;
foam product density delta for the ith weight range for the same ore i The measurement is only needed once, namely, the next time of test is carried out, and the step 0 is not needed; foam product density delta for the ith weight range i The absolute value of the difference from the average density delta of the foam product is less than 3-5%, and step 5 is not required.
2. A method for rapid measurement of the weight of a flotation froth product according to claim 1, wherein the adjusting in step 6 comprises: if the weight of solids in the product is m i If the value is smaller than the preset value, continuingChemical flotation until the weight m of solids in the product i Stopping floatation when the preset value is reached; after the flotation is finished, if foam remains in the tank, the addition amount of the collecting agent or the foaming agent is reduced in the next test.
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