Classification and heaping method for copper and cobalt ores

Abstract

The invention relates to a method for classifying and heaping copper and cobalt ores, which measures the grade, the oxidation rate and the acid consumption of each vehicle of ores by using different methods, and classifies and heapes the ores according to different properties. According to the ore grade, the oxidation rate and the acid consumption, the ores are classified and heaped, and the ore heaps are numbered uniformly, so that the management of the ore heaps in a mine field is facilitated, the ore blending use of various ores is realized, the process fluctuation caused by the ore property fluctuation is reduced, and the comprehensive utilization efficiency of resources is improved. Ores of the same kind are stored in different piles, so that the situation that the same ore pile continues to build the pile before being completely consumed, and a large pile which cannot be consumed throughout the year is formed due to circulation all the time is avoided, and the problem that data difference between theoretical inventory and actual inventory is too large possibly caused by accumulative errors is solved. The method optimizes the obtaining mode of the bulk specific gravity, grade, average acid consumption and average oxidation rate data of the ore piles, enables the obtained data to be more representative, and can better guide the production.

Description

Technical Field

[0001] The invention relates to the technical field of ore classification, and in particular to a method for classifying and piling copper-cobalt ores. Background Art

[0002] In the actual production process of open-pit or underground copper-cobalt mines, the ore mined from the mine is generally directly put into the beneficiation system, and the ore blending work is basically completed in the mine. However, in order to ensure the continuity and stability of the beneficiation system, some of the ore mined from the mine is sometimes stored in the intermediate ore yard. In general, the ore stockpile is mainly unloaded by dump trucks or mine cars to the designated intermediate ore yard, and then flattened by loaders or bulldozers. When in use, it is used with the ore mined from the mine or supplied to the beneficiation system alone.

[0003] The intermediate ore stockpile connects the two major systems of the mining site and the beneficiation and smelting sites, involving the metal balance of the mining site and the metal balance of the beneficiation and smelting sites. The representativeness and measurement accuracy of the ore stockpile inventory are easily affected by many factors, making it difficult to manage. In addition, mining units pay relatively little attention to the management of ore stockpiles, which is mainly reflected in the following aspects: (1) Ore stockpiles are only simply numbered, such as ore stockpile-1, oxide ore-A, low-grade ore, etc., and rarely carry out systematic numbering management. (2) Ore stockpiles are generally only roughly divided into industrial ore, low-grade ore, etc., without being classified and stored according to different properties such as ore grade, oxidation rate, acid consumption, etc., and the same ore stockpile will continue to be piled up after it is not completely consumed, and it will be repeated over and over again, which makes it difficult to manage metal balance and inventory. (3) In order to meet the requirements of crushing feed, the ore particle size distribution is not uniform, and it is difficult to obtain a more accurate ore stockpile specific gravity. In addition, due to the repeated rolling of vehicles and machinery, the compaction degree of each position of the ore stockpile is different, and the ore stockpile specific gravity measured by inventory is less representative. (4) The grade of ore piles is generally obtained by sampling and analysis of some ore samples picked up from the surface of the ore pile. The sampling is poorly representative and it is difficult to represent the overall grade of the ore pile. The above problems lead to unclear properties of the ore used in actual production, the quality of the obtained products is greatly affected by the properties of the ore, it is difficult to match and use multiple ores, and the comprehensive utilization efficiency of resources is low. Therefore, it is of great significance to develop and design a method for classifying and building piles of copper and cobalt ores. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art that the ore properties in the ore pile are unclear, the ore blending and use among various ores is difficult, and the comprehensive resource utilization efficiency is low, the present invention provides a method for classifying and piling copper-cobalt ores, and classifying and storing the ores according to different properties such as ore grade, oxidation rate, acid consumption, etc., which is conducive to the blending and use of various ores, reduces process fluctuations caused by fluctuations in ore properties, and thus improves the comprehensive resource utilization efficiency.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A method for classifying and piling copper-cobalt ores comprises the following steps:

[0007] Weigh the empty vehicle to get the empty vehicle mass M 空 , load the ore onto the truck and weigh it to get the total mass M of the ore and the truck;

[0008] Ore grade test: weigh a representative ore sample of mass m1 from each car or other means, add sufficient acid to the ore sample, and leach the ore sample; after the leaching of the ore sample is completed, separate the leachate and the leaching residue, and dilute the leachate to a 100mL volumetric flask, and measure the copper concentration in the leachate by flame atomic absorption spectrometry as c1; perform a blank experiment with the ore sample, and obtain the copper concentration in the blank experiment as c0; according to Calculate the grade of each car of ore;

[0009] Ore oxidation rate test: weigh a representative ore sample with a mass of m2 from each ore car or other means, add sufficient dilute sulfuric acid to the ore sample, and leach the ore sample; after the leaching of the ore sample is completed, separate the leachate and the leaching residue, and titrate the copper in the leachate by iodine titration to obtain the volume V1 of the sodium thiosulfate standard solution consumed by the titration of copper; perform a blank experiment with the ore sample to obtain the volume V0 of the sodium thiosulfate standard solution consumed by the titration of copper in the blank experiment, and calculate the volume V1 according to the volume V0 of the sodium thiosulfate standard solution consumed by the titration of copper. The oxidation rate of each car of ore is calculated, where F Cu is the titration coefficient;

[0010] Ore acid consumption test: Weigh a representative ore sample of m3 from each ore car or other means, add sufficient concentrated sulfuric acid to the ore sample, and leach the ore sample, wherein the mass of the added concentrated sulfuric acid is m3. 酸 After the ore sample is leached, the leachate and the leaching residue are separated, and the leachate volume V2 and pH are measured; according to c 酸 =10 -pH Calculate the concentration of sulfuric acid in the leaching solution; Calculate the acid consumption of each car of ore;

[0011] The ore grade, oxidation rate and acid consumption are divided into three levels of A, B and C according to the numerical values. Ores with the same grade, oxidation rate and acid consumption levels can be piled together in any combination according to the site size and production needs.

[0012] Furthermore, the ore grade is greater than 3% for Grade A, the grade is between 2-3% for Grade B, and the grade is less than 2% for Grade C; the ore oxidation rate is greater than 90% for Grade A, the oxidation rate is between 80-90% for Grade B, and the oxidation rate is less than 80% for Grade C; the ore acid consumption is less than 150kg / ton for Grade A, the acid consumption is between 150-200kg / ton for Grade B, and greater than 200kg / ton for Grade C.

[0013] Furthermore, each ore pile has a unique number, and is uniformly numbered according to "ore pile location code + pile building time + serial number".

[0014] Furthermore, if the site space permits and production needs are met in the early stage, ores with the same grade, oxidation rate and acid consumption level can be piled into at least two piles.

[0015] Further, the specific gravity of the pile of ore = pile weight / pile volume = ∑ (MM 空 ) / pile volume.

[0016] Furthermore, the pile volume is measured by RTK or drone-mounted radar.

[0017] Further,

[0018] Further,

[0020] Further,

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention provides a method for classifying and piling copper-cobalt ores. The ores are classified and piled according to the ore grade, oxidation rate and acid consumption, and the ore piles are uniformly numbered, which is conducive to the use of multiple ores, reducing process fluctuations caused by fluctuations in ore properties, and thus improving the comprehensive utilization efficiency of resources. The same type of ore is stored in separate piles to avoid the same ore pile from being piled up before it is completely consumed, resulting in a "large pile" that cannot be consumed all year round, and solving the problem of excessive differences between theoretical inventory and actual inventory data due to cumulative errors. The method of obtaining the data of the pile specific gravity, grade, average acid consumption, and average oxidation rate of the ore pile is optimized to make the obtained data more representative and better guide production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The embodiments of the present invention are further described below with reference to the accompanying drawings, in which:

[0024] Figure 1Schematic diagrams of the intermediate ore yard before and after optimization are shown.

[0025] Figure 2 A schematic diagram showing the ore stockpiling, reserve, and consumption;

[0026] Illustration symbols: 1-building pile, 2-stockpiling for standby, 3-being consumed, 4-bulldozer equipment, 5-loading equipment, 6-shovel loading equipment. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] A method for classifying and piling copper-cobalt ores comprises the following steps:

[0029] Weigh the empty vehicle to get the empty vehicle mass M 空 , load the ore onto the truck and weigh it to get the total mass M of the ore and the truck;

[0030] Ore grade test: weigh a representative ore sample of mass m1 from each car or other means, add sufficient acid to the ore sample, and leach the ore sample; after the leaching of the ore sample is completed, separate the leachate and the leaching residue, and dilute the leachate to a 100mL volumetric flask, and measure the copper concentration in the leachate by flame atomic absorption spectrometry as c1; perform a blank experiment with the ore sample, and obtain the copper concentration in the blank experiment as c0; according to Calculate the grade of each car of ore;

[0031] Ore oxidation rate test: weigh a representative ore sample with a mass of m2 from each ore car or other means, add sufficient dilute sulfuric acid to the ore sample, and leach the ore sample; after the leaching of the ore sample is completed, separate the leachate and the leaching residue, and titrate the copper in the leachate by iodine titration to obtain the volume V1 of the sodium thiosulfate standard solution consumed by the titration of copper; perform a blank experiment with the ore sample to obtain the volume V0 of the sodium thiosulfate standard solution consumed by the titration of copper in the blank experiment, and calculate the volume V1 according to the volume V0 of the sodium thiosulfate standard solution consumed by the titration of copper. The oxidation rate of each car of ore is calculated, where F Cu is the titration coefficient;

[0032] Ore acid consumption test: Weigh a representative ore sample of m3 from each ore car or other means, add sufficient concentrated sulfuric acid to the ore sample, and leach the ore sample, wherein the mass of the added concentrated sulfuric acid is m3. 酸 After the ore sample is leached, the leachate and the leaching residue are separated, and the leachate volume V2 and pH are measured; according to c酸 =10 -pH Calculate the concentration of sulfuric acid in the leaching solution; Calculate the acid consumption of each car of ore;

[0033] The ore grade, oxidation rate and acid consumption are divided into three levels of A, B and C according to the numerical values. They can be combined arbitrarily according to the site size and production needs. The ores with the same grade level, oxidation rate level and acid consumption level are piled together. For example, if ore 1 is AAB, ore 2 is BAC and ore 3 is AAB, then ore 1 and ore 3 are piled together.

[0034] In one embodiment of the present invention, the ore grade is greater than 3% for Grade A, the grade is between 2-3% for Grade B, and the grade is less than 2% for Grade C; the ore oxidation rate is greater than 90% for Grade A, the oxidation rate is between 80-90% for Grade B, and the oxidation rate is less than 80% for Grade C; the ore acid consumption is less than 150kg / ton for Grade A, the acid consumption is between 150-200kg / ton for Grade B, and greater than 200kg / ton for Grade C.

[0035] In one embodiment of the present invention, each ore pile has a unique number, and is uniformly numbered according to "ore pile location code + pile building time + sequence number".

[0036] In one embodiment of the present invention, if the site space permits and production needs are met in the early stage, ores with the same grade level, oxidation rate level and acid consumption level can be piled into at least two piles.

[0037] In one embodiment of the present invention, the specific gravity of the pile of ore = pile weight / pile volume = ∑

[0038] (MM 空 ) / pile volume.

[0039] In one embodiment of the present invention, the stack volume is measured by RTK or drone-mounted radar.

[0040] In one embodiment of the present invention,

[0041] In one embodiment of the present invention,

[0042] In one embodiment of the present invention,

[0043] Reference Figure 1-2The ore properties of the ore pile optimized by the present invention are clear, which is convenient for ore matching among various ores. The same type of ore is stored in separate piles to avoid the same ore pile being built up before it is completely consumed, resulting in a cycle of forming a "large pile" that cannot be consumed all year round.

[0044] The present invention provides a method for classifying and piling copper-cobalt ores. The ores are classified and piled according to the ore grade, oxidation rate and acid consumption, and the ore piles are uniformly numbered, which is convenient for the mine to manage the ore piles, and is conducive to the use of multiple ores, reducing process fluctuations caused by fluctuations in ore properties, thereby improving the comprehensive utilization efficiency of resources. The same type of ore is stored in separate piles to avoid the same ore pile from being piled up before it is completely consumed, resulting in a "large pile" that cannot be consumed all year round, and solving the problem of excessive differences between theoretical inventory and actual inventory data due to cumulative errors. The method of obtaining the data of the pile specific gravity, grade, average acid consumption, and average oxidation rate of the ore pile is optimized to make the obtained data more representative and better guide production.

[0045] Some exemplary embodiments of the present invention are described above. It can be understood that the above embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention. The features in these embodiments can be recombined in a suitable manner, and the scheme obtained thereby is still within the protection scope required by the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without making creative work, that is, all modifications, equivalent substitutions and improvements made within the spirit and principles of this application, fall within the protection scope required by the present invention.

Claims

1. A method for classifying and piling copper-cobalt ores, characterized in that: The steps include: Weigh the empty vehicle to get the empty vehicle mass M 空 , load the ore onto the truck and weigh it to get the total mass M of the ore and the truck; Ore grade test: weigh a representative ore sample of mass m1 from each car or other means, add sufficient acid to the ore sample, and leach the ore sample; after the leaching of the ore sample is completed, separate the leachate and the leaching residue, and dilute the leachate to a 100mL volumetric flask, and measure the copper concentration in the leachate by flame atomic absorption spectrometry as c1; perform a blank experiment with the ore sample, and obtain the copper concentration in the blank experiment as c0; according to Calculate the grade of each car of ore; Ore oxidation rate test: weigh a representative ore sample with a mass of m2 from each ore car or other means, add sufficient dilute sulfuric acid to the ore sample, and leach the ore sample; after the leaching of the ore sample is completed, separate the leachate and the leaching residue, and titrate the copper in the leachate by iodine titration to obtain the volume V1 of the sodium thiosulfate standard solution consumed by the titration of copper; perform a blank experiment with the ore sample to obtain the volume V0 of the sodium thiosulfate standard solution consumed by the titration of copper in the blank experiment, and calculate the volume V1 according to the volume V0 of the sodium thiosulfate standard solution consumed by the titration of copper. The oxidation rate of each car of ore is calculated, where F Cu is the titration coefficient; Ore acid consumption test: Weigh a representative ore sample of m3 from each ore car or other means, add sufficient concentrated sulfuric acid to the ore sample, and leach the ore sample, wherein the mass of the added concentrated sulfuric acid is m3. 酸 After the leaching of the ore sample is completed, the leachate and the leaching residue are separated, and the leachate volume V2 and pH are measured; according to c 酸 =10 -pH Calculate the concentration of sulfuric acid in the leaching solution; Calculate the acid consumption of each car of ore; The ore grade, oxidation rate and acid consumption are divided into three levels of A, B and C according to the numerical values. Ores with the same grade, oxidation rate and acid consumption levels can be piled together in any combination according to the site size and production needs.

2. The method for classifying and piling copper-cobalt ores according to claim 1, characterized in that: The ore grade is A if it is greater than 3%, B if it is between 2-3%, and C if it is less than 2%; the ore oxidation rate is A if it is greater than 90%, B if it is between 80-90%, and C if it is less than 80%; the ore acid consumption is A if it is less than 150kg / ton, B if it is between 150-200kg / ton, and C if it is greater than 200kg / ton.

3. A method for classifying and piling copper-cobalt ores according to claim 1 or 2, characterized in that: Each ore pile has a unique number and is uniformly numbered according to "ore pile location code + pile building time + serial number".

4. The method for classifying and piling copper-cobalt ores according to claim 1, characterized in that: If the site space permits and production needs are met in the early stage, ores with the same grade, oxidation rate and acid consumption level can be piled up in at least two piles.

5. The method for classifying and piling copper-cobalt ores according to claim 1, characterized in that: The specific gravity of the pile of ore = pile weight / pile volume = ∑ (MM 空 ) / pile volume.

6. The method for classifying and piling copper-cobalt ores according to claim 5, characterized in that: The pile volume is measured by RTK or drone-mounted radar.

7. The method for classifying and piling copper-cobalt ores according to claim 1, characterized in that: Stacked 8. The method for classifying and piling copper-cobalt ores according to claim 1, characterized in that: Stacked 9. The method for classifying and piling copper-cobalt ores according to claim 1, characterized in that: Stacked

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