CN113926585A - Method for rapidly settling fine particles of copper smelting slag flotation tailings - Google Patents
Method for rapidly settling fine particles of copper smelting slag flotation tailings Download PDFInfo
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- CN113926585A CN113926585A CN202111117581.3A CN202111117581A CN113926585A CN 113926585 A CN113926585 A CN 113926585A CN 202111117581 A CN202111117581 A CN 202111117581A CN 113926585 A CN113926585 A CN 113926585A
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- flotation
- tailing
- fine particles
- medicament
- smelting slag
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/04—General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
Abstract
The invention relates to a method for quickly settling fine particles in copper smelting slag flotation tailings, and belongs to the technical field of smelting slag flotation in metallurgy. The invention injects the combined reagent into the tailing pulp at the tailing outlet of the flotation, and enters the tailing concentration tank along with the pulp, and the fine particles of the flotation tailing are rapidly settled in the tailing concentration tank; the combined medicament comprises polyacrylamide, polyaluminium chloride and lime powder. The method optimizes and improves the particle sedimentation effect in the field flotation tailings from the aspects of medicament proportioning, medicament addition amount, medicament adding time control and the like, can effectively reduce the water content of the flotation tailings and the repeated circulation of fine particles in circulating water in the production flow, is convenient to operate and control, is favorable for reducing the production cost, and improves the flotation index and the enterprise economic benefit.
Description
Technical Field
The invention belongs to the technical field of smelting slag flotation in metallurgy, and particularly relates to a method for rapidly settling fine particles in copper smelting slag flotation tailings.
Background
Copper smelting slag flotation is a mineral separation method for separating minerals by utilizing different physicochemical properties of the surface of copper smelting slag, and the research center is the floatability of the minerals, which is based on the physicochemical properties of the surface of the minerals and discusses the relationship between a phase interface phenomenon and the floatability of the minerals. The mineral flotation is mainly characterized in that hydrophobic metal minerals are selectively attached to air bubbles in ore pulp under the action of the surface tension of liquid, the hydrophobic metal minerals float upwards to the surface of the ore pulp along with the air bubbles to form a mineralized foam layer, hydrophilic gangue particles cannot be attached to the air bubbles and are left in the ore pulp, the separation of useful minerals and gangue is achieved, and products after the mineral flotation mainly comprise concentrate and tailings.
The operation time of the copper smelting slag flotation process is too long, the moisture in the tailing slag is abnormally high, mainly because the fine particles in the circulating water are increased, the fine particles are repeatedly circulated along with the circulating water in the production flow, the concentration of the fine particles in the water is continuously increased after a period of time, finally the fine particles enter the ceramic filter along with tailing slurry, and a large number of fine particles cause the capillary holes of the filter plate to be blocked, so that the moisture of the tailing slag is continuously increased after the ceramic filter plate is quickly exhausted within 1 hour (the ceramic plate is normally used and cleaned once within 8 hours). For the above reasons, it is necessary to research a method for promoting the rapid sedimentation of fine particles in flotation tailings, reducing the moisture content of tailings and the repeated circulation of fine particles in circulating water in the production process, stabilizing production indexes, reducing production cost, and improving flotation indexes and enterprise economic benefits.
Disclosure of Invention
In order to overcome the problems in the background technology, the invention provides a method for rapidly settling fine particles in copper smelting slag flotation tailings, which settles particles in the flotation tailings from the aspects of reagent proportioning, reagent addition amount control, precise reagent addition and the like, improves the stability of dosage and dosing, enables a combined reagent to uniformly enter tailing pulp through a scientific dosing mode and a scientific dosing point, reduces reagent waste while stabilizing the particle settling effect in the pulp by adjusting the reagent addition amount and the proportioning, effectively reduces the moisture content of the flotation tailings and the repeated circulation of the fine particles in circulating water in the production flow, is convenient to operate and control, is beneficial to reducing the production cost, and improves the flotation index and the enterprise economic benefit.
In order to realize the purpose, the invention is realized by the following technical scheme:
the method for rapidly settling the fine particles of the copper smelting slag flotation tailings comprises the following steps: and at the outlet of the flotation tailings, the combined reagent is injected into tailing pulp through a connecting pipeline and a control valve, and enters a tailing concentration tank along with the pulp, and the fine particles of the flotation tailings are rapidly settled in the tailing concentration tank. Through tests of different dosing points, the flotation tailing outlet is the most suitable dosing point, and ore pulp sedimentation is facilitated.
Further preferably, the combination drug comprises polyacrylamide, polyaluminium chloride and lime powder. The combined reagent is used for rapid sedimentation of flotation pulp, has the advantages of strong adsorption force and high sedimentation speed, and has a sedimentation effect remarkably superior to that of a single use.
Further preferably, the dosing criteria of the combination medicament are: the adding ratio of polyacrylamide to polyaluminium chloride is (1 +/-0.5): (10 +/-1), wherein the adding amount of the lime powder is 10-15 kg/h; adding polyacrylamide and polyaluminium chloride in one hour period, adding polyacrylamide in the first 30min, and adding polyaluminium chloride in the last 30 min; controlling the pH value of the ore pulp after the agent is added to be 7-8.
According to the characteristics of the medicament, specific dosing standards are established, a mode of controlling dosing time is adopted after one-time dispensing, dosing is alternately carried out every half hour, dosing quality at each time is accurately controlled, and balanced dosing is realized.
The adding amount and the proportion of the combined medicament can be adjusted according to the concentration and the fineness of the ore pulp, so that the medicament waste is reduced, and the particle sedimentation effect in the ore pulp is stabilized. Under the conventional condition, the ratio of the polyacrylamide and the polyaluminium chloride is 1:10, when the ore pulp is thinner and the mineral particles are thinner, the ratio of the polyacrylamide can be properly increased, and when the ore pulp is thicker and the mineral particles are thicker, the ratio of the polyacrylamide can be properly reduced or the addition amount of the polyaluminium chloride can be adjusted. The adding amount and the proportion of the medicament are adjusted according to different thicknesses and fineness, so that the medicament waste is reduced while the sedimentation effect of particles in the ore pulp is effectively stabilized.
Further preferably, the chemicals are quantitatively added into the ore pulp through a water pump and a flowmeter, so that the chemicals are added and applied more accurately, the consumption of the chemicals is reduced, and the particle settling effect in the ore pulp is ensured.
Preferably, pH test paper is used for detecting the pH value of overflow water of the tailing concentration tank every 2 hours to obtain a pH value, and the addition amount of lime is adjusted according to the pH value.
The invention has the beneficial effects that:
the invention provides a method for promoting the rapid sedimentation of fine particles in copper smelting slag flotation tailings, which optimizes and improves the sedimentation effect of particles in the on-site flotation tailings from the aspects of medicament proportioning, medicament addition amount, medicament adding time control and the like, can effectively reduce the water content of the flotation tailings and the repeated circulation of fine particles in circulating water in the production flow, is convenient for operation and control, is beneficial to reducing the production cost, and improves the flotation index and the enterprise economic benefit.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments of the present invention will be described in detail below to facilitate understanding of the skilled person.
A method for rapidly settling fine particles of copper smelting slag flotation tailings comprises the following steps:
(1) preparing a combined medicament and adding medicaments: the combined medicament comprises polyacrylamide, polyaluminium chloride and lime powder. The dosing standard of the combined medicament is as follows: the adding ratio of polyacrylamide to polyaluminium chloride is (1 +/-0.5): (10 +/-1), wherein the adding amount of the lime powder is 10-15 kg/h; adding polyacrylamide and polyaluminium chloride in one hour period, adding polyacrylamide in the first 30min, and adding polyaluminium chloride in the last 30 min; controlling the pH value of the ore pulp after the agent is added to be 7-8.
(2) At the flotation tailing export, through charge device strict control combination medicament addition and flow size such as through water pump and flowmeter, improve and add medicine stability and realize adjusting and control the dose according to actual need, reduce the medicament extravagant, guaranteed the granule settlement effect in the ore pulp simultaneously. The combined reagent is injected into tailing pulp through a connecting pipeline and a control valve, and enters a tailing concentration tank along with the pulp, and flotation tailing fine particles are rapidly settled in the tailing concentration tank. Through tests of different dosing points, the flotation tailing outlet is the most suitable dosing point, and ore pulp sedimentation is facilitated.
(3) And (4) performing segmented detection, detecting the pH value of the overflow water of the tailing concentration tank by using pH test paper every 2 hours to obtain the pH value, and adjusting the addition amount of lime according to the pH value.
The copper smelting slag flotation tailings are treated by the method, and the treated tailing amount, the chemical adding amount and the chemical adding time are shown in the table.
The flotation pulp contains a large amount of mineral particles and suspended matters, and the main pollutants are various oily substances and residual flotation reagents; meanwhile, the ore pulp treatment technology is complex, and strict requirements are imposed on the pH value after sedimentation, the content of a flotation reagent, the content of metal ions and the like. The polyacrylamide (anion) has a large molecular extension degree in water and good particle flocculation performance; the polyaluminium chloride has high electric neutralization and bridging effects on colloids and particles in water, can strongly remove micro-toxicants and heavy metal ions, and has stable properties. The method comprises the steps of adding quantitative polyacrylamide to enable fine particles in circulating water to form floccules, then adding quantitative polyaluminium chloride to enable floccules to form large particles to accelerate sedimentation, promoting sedimentation of the fine particles and reducing moisture of tailings.
The colored slag in Yunnan adopts a flotation mode to recover the metal copper in the slow cooling slag, flotation product concentrate and tailings enter a concentration tank for sedimentation separation, and a ceramic filter is adopted to reduce the water in the concentrate and the tailings. When no medicament is added, the water content of the tailings reaches about 16 percent, the content of fine particles in the slag-separation circulating water is high, the filter plate of the ceramic filter is seriously blocked, the cleaning frequency of the ceramic filter plate is improved from 8 hours per time to 1 hour per time, and the water content of the tailings is continuously increased. After the agents (1.5 kg/h of polyacrylamide, 15kg/h of polyaluminium chloride and 10kg/h of lime) are added periodically, the water content of tailings is stably controlled to be about 12%, the cleaning frequency of the ceramic filter plate is effectively reduced from 1 hour/time to 10 hours/time, and the water content of flotation tailings and the repeated circulation of fine particles in circulating water in the production process are obviously reduced. Experiments prove that the sedimentation effect of the combined medicament is obviously superior to that of the single use.
The invention provides a method for promoting the rapid sedimentation of fine particles in copper smelting slag flotation tailings, which optimizes and improves the sedimentation effect of particles in the on-site flotation tailings from the aspects of medicament proportioning, medicament addition amount, medicament adding time control and the like, can effectively reduce the water content of the flotation tailings and the repeated circulation of fine particles in circulating water in the production flow, is convenient for operation and control, is beneficial to reducing the production cost, and improves the flotation index and the enterprise economic benefit.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (5)
1. A method for rapidly settling fine particles of copper smelting slag flotation tailings is characterized by comprising the following steps: the combined reagent is injected into tailing pulp at a tailing outlet of the flotation, and enters a tailing concentration tank along with the pulp, and fine particles of the flotation tailings are rapidly settled in the tailing concentration tank.
2. The method of claim 1, wherein the method comprises the following steps: the combined medicament comprises polyacrylamide, polyaluminium chloride and lime powder.
3. The method of claim 2, wherein the method comprises the following steps: the dosing standard of the combined medicament is as follows: the adding ratio of polyacrylamide to polyaluminium chloride is (1 +/-0.5): (10 +/-1), wherein the adding amount of the lime powder is 10-15 kg/h; adding polyacrylamide and polyaluminium chloride in one hour period, adding polyacrylamide in the first 30min, and adding polyaluminium chloride in the last 30 min; controlling the pH value of the ore pulp after the agent is added to be 7-8.
4. The method for the rapid sedimentation of fine particles of copper smelting slag flotation tailings according to any one of claims 1 to 3, wherein the method comprises the following steps: the chemical agent quantitatively adds the chemical into the ore pulp through a water pump and a flowmeter.
5. The method of claim 3 or 4, wherein the method comprises the following steps: and the pH value is obtained by detecting the pH value of the overflow water of the tailing concentration tank by adopting pH test paper.
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| CN202111117581.3A CN113926585A (en) | 2021-09-23 | 2021-09-23 | Method for rapidly settling fine particles of copper smelting slag flotation tailings |
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| CN202111117581.3A CN113926585A (en) | 2021-09-23 | 2021-09-23 | Method for rapidly settling fine particles of copper smelting slag flotation tailings |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202962644U (en) * | 2012-11-28 | 2013-06-05 | 浙江和鼎铜业有限公司 | Copper melting converting furnace slag mineral processing technology production line |
| WO2014153570A2 (en) * | 2013-03-15 | 2014-09-25 | Transtar Group, Ltd | New and improved system for processing various chemicals and materials |
| CN107790295A (en) * | 2017-09-28 | 2018-03-13 | 楚雄滇中有色金属有限责任公司 | A kind of high fineness flotation concentrates sedimentation method of Copper making clinker |
| CN109304256A (en) * | 2018-09-11 | 2019-02-05 | 湖北大江环保科技股份有限公司 | A kind of method of comprehensive utilization of copper metallurgy tailings |
| CN111921719A (en) * | 2020-07-08 | 2020-11-13 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for reducing water content of copper concentrate in ore grinding-flotation process |
-
2021
- 2021-09-23 CN CN202111117581.3A patent/CN113926585A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202962644U (en) * | 2012-11-28 | 2013-06-05 | 浙江和鼎铜业有限公司 | Copper melting converting furnace slag mineral processing technology production line |
| WO2014153570A2 (en) * | 2013-03-15 | 2014-09-25 | Transtar Group, Ltd | New and improved system for processing various chemicals and materials |
| CN107790295A (en) * | 2017-09-28 | 2018-03-13 | 楚雄滇中有色金属有限责任公司 | A kind of high fineness flotation concentrates sedimentation method of Copper making clinker |
| CN109304256A (en) * | 2018-09-11 | 2019-02-05 | 湖北大江环保科技股份有限公司 | A kind of method of comprehensive utilization of copper metallurgy tailings |
| CN111921719A (en) * | 2020-07-08 | 2020-11-13 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for reducing water content of copper concentrate in ore grinding-flotation process |
Non-Patent Citations (1)
| Title |
|---|
| 王礼珊等: "絮凝剂在铜冶炼炉渣浮选尾渣脱水中的应用实践", 云南冶金, vol. 50, no. 3, pages 19 - 23 * |
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