Copper-sulfur separation method based on superfine material
By using the method of copper sulfur separation based on ultra -fine materials, a variety of additives and multiple stirring steps are used to solve the problem of incomplete separation and equipment scaling in the existing copper sulfur separation method. , Improve the quality of copper concentrate.
Patent Information
- Application Number
- CN202411384284.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-01-28
AI Technical Summary
The existing copper-sulfur separation method has the problem of incomplete separation, which leads to the copper concentrate after separation of sulfur still contains a small amount of sulfur, which affects the quality of copper concentrate. The use of calcium hydroxide as a sulfur inhibitor will cause scaling and blocking equipment. etc.
Adopt a copper sulfur separation method based on ultra -fine material, through steps such as grinding, grouting, flotal, selection, and secondary selection, using sulfur inhibitors, recovery agents, foaming agents and salt inhibitors to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form air bubbles to form bubbles to form bubbles to form bubbles to form bubbles And mix multiple times to gradually separate sulfur, thereby reducing the sulfur content.
Effectively reduce the content of sulfur in the copper essence after separation of sulfur, improve the quality of copper concentrate, and avoid the problem of equipment dirt caused by calcium hydroxide, and reduce the damage to the equipment.
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Abstract
Description
Technical Field
[0001] The present application relates to the technical field of copper-sulfur separation, and in particular to a copper-sulfur separation method based on ultrafine materials. Background Art
[0002] The reserves of copper-sulfur ore are huge, and most porphyry copper ores contain a certain amount of sulfur. Since the floatability of sulfur is similar to that of copper, many mineral processing processes adopt copper-sulfur mixed flotation, or copper-sulfur and other flotation processes, and then separate copper and sulfur to obtain qualified copper concentrate.
[0003] In the current copper-sulfur separation method, the separation is not complete, and the obtained copper concentrate from which sulfur is separated still contains a small amount of sulfur, which affects the quality of the copper concentrate.
[0004] In addition, in the prior art, calcium hydroxide is generally used as a sulfur inhibitor, which may cause scaling, equipment clogging and other problems.
[0005] Therefore, it is necessary to develop a new method for separating copper and sulfur to reduce the damage to equipment during the separation process, reduce the sulfur content in the copper concentrate after sulfur separation, and improve the quality of the copper concentrate. Summary of the invention
[0006] In order to solve at least one of the above technical problems, a copper-sulfur separation method is developed to reduce the sulfur content in the copper concentrate after sulfur separation. The present application provides a copper-sulfur separation method based on ultrafine materials.
[0007] The copper-sulfur separation method based on ultrafine materials provided in the present application comprises the following steps:
[0008] S1. Grinding
[0009] Grinding the copper sulfide ore;
[0010] S2. Slurry preparation
[0011] Add water to adjust the pulp to a pulp concentration of 10-20%wt, add sulfur inhibitor and stir;
[0012] S3, flotation
[0013] In the flotation tank, collectors and frothers are added and aeration is performed to form bubbles in the slurry, which rise to the surface to form foam;
[0014] S4, Selected
[0015] Adding salt inhibitor to the flotation foam and stirring to obtain selected foam;
[0016] S5, Secondary Selection
[0017] A salt inhibitor is added into the selected foam and stirred to obtain a copper concentrate from which sulfur is separated.
[0018] Optionally, in S1, the material ground to a fineness not exceeding 0.043 mm accounts for 90%wt or more.
[0019] Optionally, in S2, the sulfur inhibitor is a combination of one or more of sulfite, sulfate, and sodium silicate;
[0020] The amount of sulfur inhibitor added is 0.1 to 0.5‰wt of the slurry weight.
[0021] Optionally, in S3, the collector is a compound of xanthate and dithiocarbamate, and the weight ratio of xanthate to dithiocarbamate is 3 to 5:1; the added amount of the collector is 0.05 to 0.3‰wt.
[0022] Optionally, in S3, the foaming agent is one or a combination of terpineol and octanol; the added amount of the foaming agent is 0.02 to 0.1‰wt.
[0023] Optionally, in S4 and S5, the salt inhibitor is sodium humate or potassium humate, or a combination of both.
[0024] Optionally, the amount of the salt inhibitor added in S4 is 0.05 to 0.1‰wt.
[0025] Optionally, the amount of the salt inhibitor added in S5 is 0.08 to 0.15‰wt.
[0026] Optionally, the amount of the salt inhibitor added in S4 is less than the amount of the salt inhibitor added in S5.
[0027] In summary, the present application designs a copper-sulfur separation method based on ultrafine materials, which does not require calcium hydroxide as a sulfur inhibitor, reduces the requirements for equipment and the frequency of subsequent equipment maintenance; and the sulfur content in the copper concentrate prepared by the copper-sulfur separation method of the present application is reduced, and the quality of the copper concentrate is improved. DETAILED DESCRIPTION
[0028] The present application is further described in detail below with reference to the embodiments.
[0029] In the following examples of the present application, the main components involved, unless otherwise specified, were purchased from commercially available products.
[0030] In the following examples of the present application, the sulfur inhibitor is exemplarily obtained by mixing sulfate and sodium silicate in a weight ratio of 1:1.
[0031] In the following examples of the present application, the collector is exemplarily a compound of xanthate and dithiocarbamate, and the weight ratio of xanthate to dithiocarbamate is 4:1.
[0032] In the following examples of the present application, the foaming agent is exemplarily prepared by mixing terpineol and octanol in a weight ratio of 1:1.
[0033] In the following examples of the present application, sodium humate is used as a salt inhibitor. Specific embodiments
[0035] Example 1
[0036] This embodiment discloses a method for separating copper and sulfur based on ultrafine materials, which is specifically as follows.
[0037] The copper sulfide ore is firstly ground until the material with a fineness not exceeding 0.043 mm accounts for 90%wt or more.
[0038] Then add water to adjust the pulp to a pulp concentration of 10-20%wt, add 0.1‰ of the weight of the pulp as a sulfur inhibitor and stir; pour it into a flotation tank, add 0.05‰wt of a collector and 0.02‰wt of a frother, and aerate it to form bubbles in the pulp, which rise to the surface to form foam; add 0.05‰wt of a salt inhibitor to the flotation foam, stir it, and obtain a selected foam;
[0039] 0.08‰wt salt inhibitor is added into the selected foam and stirred to obtain copper concentrate with separated sulfur.
[0040] Example 2
[0041] This embodiment discloses a copper-sulfur separation method based on ultrafine materials, which is specifically as follows.
[0042] The copper sulfide ore is firstly ground until the material with a fineness not exceeding 0.043 mm accounts for 90%wt or more.
[0043] Then add water to adjust the pulp to a pulp concentration of 10-20%wt, add 0.2‰ of the weight of the pulp as a sulfur inhibitor and stir; pour it into a flotation tank, add 0.1‰wt of a collector and 0.05‰wt of a frother, and aerate it to form bubbles in the pulp, which rise to the surface to form foam; add 0.08‰wt of a salt inhibitor to the flotation foam, stir it, and obtain a selected foam;
[0044] 0.08‰wt salt inhibitor is added into the selected foam and stirred to obtain copper concentrate with separated sulfur.
[0045] Example 3
[0046] This embodiment discloses a method for separating copper and sulfur based on ultrafine materials, which is specifically as follows.
[0047] The copper sulfide ore is firstly ground until the material with a fineness not exceeding 0.043 mm accounts for 90%wt or more.
[0048] Then add water to adjust the pulp to a pulp concentration of 10-20%wt, add 0.3‰ of the weight of the pulp as a sulfur inhibitor and stir; pour it into a flotation tank, add 0.15‰wt of a collector and 0.08‰wt of a frother, and aerate it to form bubbles in the pulp, which rise to the surface to form foam; add 0.1‰wt of a salt inhibitor to the flotation foam, stir it, and obtain a selected foam;
[0049] 0.08‰wt salt inhibitor is added into the selected foam and stirred to obtain copper concentrate with separated sulfur.
[0050] Example 4
[0051] This embodiment discloses a copper-sulfur separation method based on ultrafine materials, which is specifically as follows.
[0052] The copper sulfide ore is firstly ground until the material with a fineness not exceeding 0.043 mm accounts for 90%wt or more.
[0053] Then add water to adjust the pulp to a pulp concentration of 10-20%wt, add 0.4‰ of the weight of the pulp as a sulfur inhibitor and stir; pour it into a flotation tank, add 0.2‰wt of a collector and 0.1‰wt of a frother, and aerate it to form bubbles in the pulp, which rise to the surface to form foam; add 0.08‰wt of a salt inhibitor to the flotation foam, stir it, and obtain a selected foam;
[0054] 0.12‰wt salt inhibitor is added into the selected foam and stirred to obtain copper concentrate with separated sulfur.
[0055] Example 5
[0056] This embodiment discloses a copper-sulfur separation method based on ultrafine materials, which is specifically as follows.
[0057] The copper sulfide ore is firstly ground until the material with a fineness not exceeding 0.043 mm accounts for 90%wt or more.
[0058] Then add water to adjust the pulp to a pulp concentration of 10-20%wt, add 0.5‰ of the weight of the pulp as a sulfur inhibitor and stir; pour it into a flotation tank, add 0.3‰wt of a collector and 0.05‰wt of a frother, and aerate it to form bubbles in the pulp, which rise to the surface to form foam; add 0.05‰wt of a salt inhibitor to the flotation foam, stir it, and obtain a selected foam;
[0059] 0.15‰wt of salt inhibitor is added into the selected foam and stirred to obtain copper concentrate with separated sulfur.
[0060] The copper concentrates from which sulfur was separated prepared in the above Examples 1 to 5 were tested, and the test results are shown in Table 1.
[0061] Table 1
[0062]
[0063]
[0064] It can be seen from Examples 1 to 5 and Table 1 that the sulfur content in the copper concentrate prepared by the technical solution of the present application for copper-sulfur separation is lower than 1%wt required in GB / T 3884.3-2000; and it can be seen from the analysis of the data in Table 1 that when the amount of salt inhibitor added to the concentration foam in the technical solution of the present application is higher than the amount of salt inhibitor added to the flotation foam, the sulfur content in the prepared copper concentrate is even lower, not exceeding 0.05%wt. In order to verify the analysis, the applicant made Examples 6 to 7 for comparative analysis with Example 3, as follows.
[0065] Example 6
[0066] This embodiment discloses a copper-sulfur separation method based on ultrafine materials, which is specifically as follows.
[0067] The copper sulfide ore is firstly ground until the material with a fineness not exceeding 0.043 mm accounts for 90%wt or more.
[0068] Then add water to adjust the pulp to a pulp concentration of 10-20%wt, add 0.3‰ of the weight of the pulp as a sulfur inhibitor and stir; pour it into a flotation tank, add 0.15‰wt of a collector and 0.08‰wt of a frother, and aerate it to form bubbles in the pulp, which rise to the surface to form foam; add 0.1‰wt of a salt inhibitor to the flotation foam, stir it, and obtain a selected foam;
[0069] 0.1‰wt salt inhibitor is added into the selected foam and stirred to obtain copper concentrate with separated sulfur.
[0070] Example 7
[0071] This embodiment discloses a copper-sulfur separation method based on ultrafine materials, which is specifically as follows.
[0072] The copper sulfide ore is firstly ground until the material with a fineness not exceeding 0.043 mm accounts for 90%wt or more.
[0073] Then add water to adjust the pulp to a pulp concentration of 10-20%wt, add 0.3‰ of the weight of the pulp as a sulfur inhibitor and stir; pour it into a flotation tank, add 0.15‰wt of a collector and 0.08‰wt of a frother, and aerate it to form bubbles in the pulp, which rise to the surface to form foam; add 0.1‰wt of a salt inhibitor to the flotation foam, stir it, and obtain a selected foam;
[0074] 0.12‰wt salt inhibitor is added into the selected foam and stirred to obtain copper concentrate with separated sulfur.
[0075] The copper concentrates from which sulfur was separated prepared in Examples 6 to 7 were tested, and the test results are shown in Table 2.
[0076] Table 2
[0077] Copper Concentrate Salt inhibitor addition amount in flotation foam Select the amount of salt inhibitor added in the foam Sulfur content / %wt Example 3 0.1‰ 0.08‰ 0.09 Example 6 0.1‰ 0.1‰ 0.07 Example 7 0.1‰ 0.12‰ 0.05
[0078] It can be seen from Examples 6 to 7, Example 3 and Table 2 that when the amount of salt inhibitor added to the concentration foam is higher than that of the flotation foam in the technical solution of the present application, the sulfur content in the prepared copper concentrate is lower, not exceeding 0.05%wt.
[0079] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A method for separating copper and sulfur based on ultrafine materials, characterized in that: The following steps are involved: S1. Grinding Grinding the copper sulfide ore; S2. Slurry preparation Add water to adjust the pulp to a pulp concentration of 10-20%wt, add sulfur inhibitor and stir; S3, flotation In the flotation tank, collectors and frothers are added and aeration is performed to form bubbles in the slurry, which rise to the surface to form foam; S4, Selected Adding salt inhibitor to the flotation foam and stirring to obtain selected foam; S5, Secondary Selection A salt inhibitor is added into the selected foam and stirred to obtain a copper concentrate from which sulfur is separated.
2. The method for separating copper and sulfur based on ultrafine materials according to claim 1, characterized in that: In S1, the material ground to a fineness not exceeding 0.043 mm accounts for 90%wt or more.
3. The method for separating copper and sulfur based on ultrafine materials according to claim 1, characterized in that: In S2, the sulfur inhibitor is one or more combinations of sulfite, sulfate, and sodium silicate; The amount of sulfur inhibitor added is 0.1 to 0.5‰wt of the slurry weight.
4. The method for separating copper and sulfur based on ultrafine materials according to claim 1, characterized in that: In S3, the collector is a compound of xanthate and dithiocarbamate, and the weight ratio of xanthate to dithiocarbamate is 3-5:1; the added amount of the collector is 0.05-0.3‰wt.
5. The method for separating copper and sulfur based on ultrafine materials according to claim 1, characterized in that: In S3, the foaming agent is one or a combination of terpineol and octanol; the added amount of the foaming agent is 0.02-0.1‰wt.
6. The method for separating copper and sulfur based on ultrafine materials according to claim 1, characterized in that: In S4 and S5, the salt inhibitor is sodium humate or potassium humate, or a combination of the two.
7. The method for separating copper and sulfur based on ultrafine materials according to claim 1, characterized in that: The amount of the salt inhibitor added in S4 is 0.05-0.1‰wt.
8. The method for separating copper and sulfur based on ultrafine materials according to claim 1, characterized in that: The amount of the salt inhibitor added in S5 is 0.08-0.15‰wt.
9. The method for separating copper and sulfur based on ultrafine materials according to claim 1, characterized in that: The amount of the salt inhibitor added in S4 is less than that in S5.