CN103643054A - Method for cleaning pipeline accumulated slag in disassembly-free mode in zinc hydrometallurgy - Google Patents
Method for cleaning pipeline accumulated slag in disassembly-free mode in zinc hydrometallurgy Download PDFInfo
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- CN103643054A CN103643054A CN201310658353.6A CN201310658353A CN103643054A CN 103643054 A CN103643054 A CN 103643054A CN 201310658353 A CN201310658353 A CN 201310658353A CN 103643054 A CN103643054 A CN 103643054A
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Abstract
The invention relates to a method for cleaning pipeline accumulated slag in a disassembly-free mode in zinc hydrometallurgy. The method comprises steps of initial ore pulp preparation, final ore pulp preparation, slag cleaning circulation, and the like. By adopting the method, two pipelines can be simultaneously cleaned, a bent pipeline can be also cleaned with rapid slag cleaning speed, high efficiency and good effect, the pipelines do not need to be disassembled, the automation degree is high, the cost is low, a part of valuable metal in the cleaned ore pulp can be recycled, and meanwhile, the environment is not polluted.
Description
Technical field
The present invention relates to a kind of method of exempting from dismounting cleaning pipeline accumulated slag, relate in particular to a kind of exempt from dismounting cleaning pipeline accumulated slag in zinc hydrometallurgy method.
Background technology
Traditional Zinc hydrometallurgy process mainly comprises the operations such as roasting, leaching, purification of leaching liquor and electrolysis of zinc sulfide concentrates, zinc sulfide concentrates is before high-temperature roasting, in zinc ore concentrate, the amount of calcium oxide accounts for 0.9%～1.0%, magnesian amount accounts for 0.2%～0.3%, after roasting, substantially all enter leaching operation together with calcining, in leaching process, the calcium in calcining, magnesium approximately 10% form with calcium sulfate magnesium sulfate enters liquid phase and forms calcium sulfate saturated solution of magnesium sulfate.Meanwhile, the calcium ions and magnesium ions that also has finite concentration content in the waste liquid of leaching is returned in electrolysis, and this just causes calcium ions and magnesium ions constantly accumulation in zinc hydrometallurgy system, and its concentration can reach 800mg/l.Because the solubleness of calcium sulfate magnesium sulfate is along with acid in solution, the variation of sulfuric acid zinc concentration and temperature constantly changes, and in Zinc Hydrometallurgy Process, exist complicated process control condition, this has just caused the crystallization of calcium magnesium at chute, pipeline, filter cloth, the equipment surface mass crystallization that cooling tower etc. contact with solution is separated out, especially pipeline crystallization formation rate can be up to 1mm/d, can make the pipeline of diameter 125mm reduce over half at a month interior diameter, transport capacity only has original 25%, if cleaning not in time, finally can cause line clogging, have a strong impact on production efficiency.Therefore, in the situation that there is no at present the accumulation of effective means resolution system calcium ions and magnesium ions, how to accomplish quick, efficient, safety, the clear and coherent crystallization accumulated slag pipeline in environmental protection ground, recover as early as possible it and use function, guarantee the normal steady running of production system, just there is very great meaning.
At present, the method for cleaning pipeline crystallization accumulated slag mainly contains: 1. with the electrolysis wastewater of wet zinc-making system, clean; 2. with artificial mechanism, crystallization is beaten to loose coming off from pipeline; 3. PIG pigging; 4. high pressure water cleaning: adopt high-pressure water jet more than 50Mpa, inner surface of pipeline accumulated slag is carried out to high-pressure water jet and peel off cleaning; 5. matting: adopt chemical agent, pipeline is carried out to interim transformation, carry out cyclic chemical cleaning with temporary pipeline and water circulating pump station from two of pipeline.Although wherein 1. method utilizes the acid in waste water can be partly dissolved basic zinc sulfate, terra alba and magnesium sulfate crystallization, because wastewater temperature is low, causes sluggish, clearance time is long, and water consumption is large, and system bulk does not allow, weak effect; 2. method needs pipeline all to disassemble just and can carry out, and labor strength is large, length consuming time, and in the process of beaing, fragile inner-walls of duct causes inwall uneven, easier crystallization accumulated slag in production afterwards; Method is 3. due to calcium magnesium crystallization accumulated slag close structure, hardness is very large, with the PIG that the other materials such as polyurethane foaming plastics or rubber are made, be difficult to make itself and tube wall depart from and push ahead, and zinc hydrometallurgy pipeline pipeline is complicated, in-line meter, baffle plate, elbow, valve, threeway are more, can cause PIG to scrape damage, even be stuck in pipeline; Method 4. water consumption is large, and the solution of going out and clinker are easily to environment; 5. method needs to overlap temporary pipeline, and simultaneously clean-out system consumption is large, and liquid and waste slag produced after having cleaned also needs to carry out environmental protection treatment, and cleaning charge is with high, and the cycle is long.
Summary of the invention
The object of the present invention is to provide a kind of exempt from dismounting cleaning pipeline accumulated slag in zinc hydrometallurgy method, the problem existing to solve above-mentioned the whole bag of tricks.
For achieving the above object, the present invention has adopted the device of exempting from dismounting cleaning pipeline accumulated slag in a kind of zinc hydrometallurgy, comprise acid thickener, underflow medial launder, underflow circulation groove, scarfing cinder pump, the first accumulated slag pipeline, underflow recycle pump, the second accumulated slag pipeline, the bottom of described acid thickener is connected with lateral, one end of lateral is connected to underflow medial launder through underflow split flow pump, the other end is connected to subordinate's operation pipeline through transferpump, described acid thickener and underflow medial launder top are provided with acid ore pulp delivery duct, described underflow medial launder bottom is connected with two pipelines, a pipeline is through scarfing cinder pump, the first accumulated slag pipeline is connected to underflow circulation groove, another root pipeline is connected to ball grinder graded machine through thick slag separate pump, pipeline is passed through in the bottom of described underflow circulation groove, underflow recycle pump, the second accumulated slag pipeline circulation is connected to underflow medial launder, the top of described underflow medial launder and underflow circulation groove is also provided with vapour pipe, sewer pipe and liquidometer.
The method of exempting from dismounting cleaning pipeline accumulated slag in a kind of zinc hydrometallurgy of the present invention adopts said apparatus to implement, and it is characterized in that: it comprises the following steps:
A, the acid ore pulp underflow concentrating by the acid ore pulp concentrating without thickener or through peracidity thickener are shunted a part to underflow medial launder, obtain for clearing up the initial ore pulp of accumulated slag pipeline;
B, the ore pulp that steps A is obtained add waste liquid logical steam in underflow medial launder, control pH value at 1.0-3.0, control temperature at 80-90 ℃, control liquid level at 70%-80%, stir and obtain for clearing up the final ore pulp of accumulated slag pipeline;
C, the ore pulp that step B is obtained pump into the first accumulated slag pipeline that needs cleaning with pump, the first accumulated slag pipeline is carried out to scarfing cinder, and the ore pulp after scarfing cinder pumps into underflow circulation groove by pipeline, add equally waste liquid logical steam in underflow circulation groove, and control condition is with step B;
D, the ore pulp that step C is obtained pump into the second accumulated slag pipeline that needs cleaning with pump, the second accumulated slag pipeline is carried out to scarfing cinder, and the ore pulp after scarfing cinder, returns into underflow medial launder, complete the whole dismounting cleaning pipeline circulation of exempting from;
E, at regular intervals to ball grinder graded post, through ball grinder graded, finally enters subsequent handling after separated coarse particles by the ore pulp open circuit part in underflow medial launder together with remaining acid ore pulp underflow.
Acid ore pulp described in steps A of the present invention is to adopt the breeze leached mud of output in Zinc Hydrometallurgy Process or zinc oxide leached mud or heavy scum or high acid leaching slag or zinc ore concentrate directly to leach the sulphur slag of generation without the acid ore pulp of liquid-solid separation, the granularity d(0.9 of contained solid particulate in described acid ore pulp) be 50-120um, d(0.5) be 10-30um left and right, volume average particle size D[4,3] be 20-40um.
Beneficial effect of the present invention is: after the acid ore pulp 1, adding in whole scale removal process or acid slurry concentrating, underflow, waste liquid and steam, all in zinc hydrometallurgy production system volumetric balance span of control, can not cause system to expand; 2, after the acid ore pulp adding in whole scale removal process or acid slurry concentrating, underflow, waste liquid and steam are system self output in Zinc Hydrometallurgy Process, without purchase, and whole scale removal process is exempted from dismounting, level of automation is high, simple to operate, therefore manning is few, and less investment, has reduced cost; 3, the ore pulp after cleaning can be processed by postorder operation in the situation that not affecting normal production, again can be to environment in the time of recovery part valuable metal; 4, owing to having utilized after acid ore pulp or acid slurry concentrating underflow high containing acid, many containing solid height and coarse particles simultaneously, and can clear up two set of tubes, cleaning pipeline accumulated slag speed is fast, efficiency is high, effective simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of exempting from the device of dismounting cleaning pipeline accumulated slag in a kind of zinc hydrometallurgy.
In accompanying drawing: 1-acid thickener, 2-underflow split flow pump, 3-transferpump, 4-underflow medial launder, 5-scarfing cinder pump, the 6-the first accumulated slag pipeline, 7-underflow circulation groove, 8-underflow recycle pump, the 9-the second accumulated slag pipeline, 10-thick slag separate pump.
Embodiment
With reference to Fig. 1, in a kind of zinc hydrometallurgy, exempt from the device of dismounting cleaning pipeline accumulated slag, comprise acid thickener 1, underflow medial launder 4, underflow circulation groove 7, scarfing cinder pump 5, the first accumulated slag pipeline 6, underflow recycle pump 8, the second accumulated slag pipeline 9, the bottom of described acid thickener 1 is connected with lateral, one end of lateral is connected to underflow medial launder 4 through underflow split flow pump 2, the other end is connected to subordinate's operation pipeline through transferpump 3, described acid thickener 1 and underflow medial launder 4 tops are provided with acid ore pulp delivery duct, described underflow medial launder 4 bottoms are connected with two pipelines, a pipeline is through scarfing cinder pump 5, the first accumulated slag pipeline 6 is connected to underflow circulation groove 7, another root pipeline is connected to ball grinder graded machine through thick slag separate pump 10, pipeline is passed through in the bottom of described underflow circulation groove 7, underflow recycle pump 8, the second accumulated slag pipeline 9 circulations are connected to underflow medial launder 4, the top of described underflow medial launder 4 and underflow circulation groove 7 is also provided with vapour pipe, sewer pipe and liquidometer.
A kind of exempt from dismounting cleaning pipeline accumulated slag in zinc hydrometallurgy method adopts above device to implement, and it comprises the following steps:
A, by without the concentrated acid ore pulp of thickener or through the concentrated acid ore pulp underflow shunting part of peracidity thickener 1 to underflow medial launder 4, obtain for clearing up the initial ore pulp of accumulated slag pipeline;
B, the ore pulp that steps A is obtained add waste liquid logical steam in underflow medial launder 4, control pH value at 1.0-3.0, control temperature at 80-90 ℃, control liquid level at 70%-80%, stir and obtain for clearing up the final ore pulp of accumulated slag pipeline;
C, the ore pulp that step B is obtained pump into the first accumulated slag pipeline 6 that needs cleaning with scarfing cinder pump 5, the first accumulated slag pipeline 6 is carried out to scarfing cinder, ore pulp after scarfing cinder pumps into underflow circulation groove 7 by pipeline, adds equally waste liquid logical steam in underflow circulation groove 7, and control condition is with step B;
D, the ore pulp that step C is obtained pump into the second accumulated slag pipeline 9 that needs cleaning with underflow recycle pump 8, the second accumulated slag pipeline 9 is carried out to scarfing cinder, and the ore pulp after scarfing cinder, returns into underflow medial launder 4, complete the whole dismounting cleaning pipeline circulation of exempting from;
E, at regular intervals to ball grinder graded post, through ball grinder graded, finally enters subsequent handling after separated coarse particles by the ore pulp open circuit part in underflow medial launder 4 together with remaining acid ore pulp underflow.
Acid ore pulp described in steps A of the present invention is to adopt the breeze leached mud of output in Zinc Hydrometallurgy Process or zinc oxide leached mud or heavy scum or high acid leaching slag or zinc ore concentrate directly to leach the sulphur slag of generation without the acid ore pulp of liquid-solid separation, the granularity d(0.9 of contained solid particulate in described acid ore pulp) be 50-120um, d(0.5) be 10-30um left and right, volume average particle size D[4,3] be 20-40um.
Acid ore pulp of the present invention is according to results of grain size analysis, 1, take breeze leached mud ore pulp is example, general granularity d(0.9) in 80um left and right, d(0.5) in 10um left and right, volume average particle size D[4,3] in 30um left and right, therefore with acid ore pulp as clean-out system, can utilize large particulate matter wherein to carry out continual washing away to pipeline crystallization accumulated slag, when itself and tube wall are departed from, can not cause damage to tube wall again, 2, the breeze leached mud ore pulp of take is example, pH value is generally in 3.5-4.0 left and right, for the basic zinc sulfate of the 20%-40% that makes to contain in terra alba in the crystallization of calcium magnesium and magnesium sulfate and accumulated slag dissolves as much as possible, need to will clear up with the pH value of ore pulp by adding waste liquid to bring up to 1.0-3.0, therefore in underflow medial launder 4 and 7 outlets of underflow circulation groove, PH meter is installed, and done to PID interlocked control program adding with pulp PH value of waste liquid, its programme controlled principle is: when in ore pulp, PH is higher than set(ting)value, PID interlocked control program can strengthen the add-on of waste liquid automatically to reduce pH value, otherwise, when in ore pulp, PH is lower than set(ting)value, PID interlocked control program can reduce the add-on of waste liquid automatically to improve pH value.The final PH situation of passing through in monitoring ore pulp, automatically controls waste liquid by PID interlock program and will enter amount, realizes the automatic control that waste liquid adds, 3, underflow medial launder 4 adopts top to stir and pass into steam with underflow circulation groove 7, controls cleaning and uses slurry temperature at 80-90 ℃, to guarantee solubilizing reaction temperature, 4, the caliber that the circular flow of a whole set of cleaning pipeline accumulated slag system need be cleared up pipeline according to need is done corresponding adjustment, to expand the contact area of ore pulp and tube wall and to wash away dynamics, and assurance cleaning effect, 5, after circulation scarfing cinder certain hour, in cleaning ore pulp, can add up a large amount of coarse particless and clinker, utilize thick slag separate pump 10 regularly to be opened a way to ball grinder graded processing, enter subsequent handling together with all the other acid ore pulp underflows, thick slag separate pump 10 is installed rly., to control the start-stop time, for guaranteeing circular flow, underflow medial launder 4 is installed liquidometer, underflow split flow pump 2 is done PID interlocked control program with underflow medial launder 4 liquid levels, to supplement a certain amount of acid ore pulp underflow, enter underflow medial launder 4 underflows, its programme controlled principle is: when underflow medial launder 4 liquid levels are lower than 40% time, underflow split flow pump 2 starts automatically, when underflow medial launder 4 liquid levels are higher than 80% time, underflow split flow pump 2 pump trips, 6, the difference with ore pulp slag according to cleaning, need do corresponding adjustment to process control parameter.
The present invention can clear up two set of tubes simultaneously, also can be used for crooked pipeline cleaning, scarfing cinder speed is fast, efficiency is high, effective, do not need to dismantle pipeline, level of automation is high, cost is low, again can be to environment when the ore pulp after cleaning can recovery part valuable metal.
Claims (2)
1. a method of exempting from dismounting cleaning pipeline accumulated slag in zinc hydrometallurgy, is characterized in that following steps:
A, the acid ore pulp underflow concentrating by the acid ore pulp concentrating without thickener or through peracidity thickener are shunted a part to underflow medial launder, obtain for clearing up the initial ore pulp of accumulated slag pipeline;
B, the ore pulp that steps A is obtained add waste liquid logical steam in underflow medial launder, control pH value at 1.0-3.0, control temperature at 80-90 ℃, control liquid level at 70%-80%, stir and obtain for clearing up the final ore pulp of accumulated slag pipeline;
C, the ore pulp that step B is obtained pump into the first accumulated slag pipeline that needs cleaning with pump, the first accumulated slag pipeline is carried out to scarfing cinder, and the ore pulp after scarfing cinder pumps into underflow circulation groove by pipeline, add equally waste liquid logical steam in underflow circulation groove, and control condition is with step B;
D, the ore pulp that step C is obtained pump into the second accumulated slag pipeline that needs cleaning with pump, the second accumulated slag pipeline is carried out to scarfing cinder, and the ore pulp after scarfing cinder, returns into underflow medial launder, complete the whole dismounting cleaning pipeline circulation of exempting from;
E, at regular intervals to ball grinder graded post, through ball grinder graded, finally enters subsequent handling after separated coarse particles by the ore pulp open circuit part in underflow medial launder together with remaining acid ore pulp underflow.
2. in a kind of zinc hydrometallurgy according to claim 1, exempt from the method for dismounting cleaning pipeline accumulated slag, it is characterized in that: acid ore pulp described in steps A adopts the breeze leached mud of output in Zinc Hydrometallurgy Process or zinc oxide leached mud or heavy scum or high acid leaching slag or zinc ore concentrate directly to leach the sulphur slag of generation without the acid ore pulp of liquid-solid separation, the granularity d(0.9 of contained solid particulate in described acid ore pulp) be 50-120um, d(0.5) be 10-30um left and right, volume average particle size D[4,3] be 20-40um.
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| CN201310658353.6A CN103643054B (en) | 2013-12-09 | 2013-12-09 | The method dismantling cleaning pipeline accumulated slag is exempted from a kind of zinc hydrometallurgy |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1361296B1 (en) * | 2001-02-16 | 2006-07-26 | Tecnicas Reunidas, S.A. | Method for electrolytic production of ultra-pure zinc or zinc compounds from zinc primary and secondary raw materials |
| CN202687999U (en) * | 2012-08-16 | 2013-01-23 | 贵阳铝镁设计研究院有限公司 | High-sulfur seed precipitation mother liquor intensified salt elimination and desulfurization production device |
| CN203090545U (en) * | 2013-03-11 | 2013-07-31 | 信发科技开发有限公司 | External-discharging red mud system of settling tank |
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- 2013-12-09 CN CN201310658353.6A patent/CN103643054B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1361296B1 (en) * | 2001-02-16 | 2006-07-26 | Tecnicas Reunidas, S.A. | Method for electrolytic production of ultra-pure zinc or zinc compounds from zinc primary and secondary raw materials |
| CN202687999U (en) * | 2012-08-16 | 2013-01-23 | 贵阳铝镁设计研究院有限公司 | High-sulfur seed precipitation mother liquor intensified salt elimination and desulfurization production device |
| CN203090545U (en) * | 2013-03-11 | 2013-07-31 | 信发科技开发有限公司 | External-discharging red mud system of settling tank |
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