CN103436692B - A kind of electromagnetic oscillation treatment unit and method - Google Patents
A kind of electromagnetic oscillation treatment unit and method Download PDFInfo
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- CN103436692B CN103436692B CN201310390001.7A CN201310390001A CN103436692B CN 103436692 B CN103436692 B CN 103436692B CN 201310390001 A CN201310390001 A CN 201310390001A CN 103436692 B CN103436692 B CN 103436692B
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Abstract
The invention discloses a kind of electromagnetic oscillation treatment unit and method, this electromagnetic oscillation treatment unit is made up of electromagnetic oscillation body, terminal box, travelling belt, is scattered with pelletizing on a moving belt; Travelling belt is between two parties through electromagnetic oscillation body, and electromagnetic oscillation internal body is wound with magnet coil, and on the case weld of the electromagnetic oscillation body U-steel frame below travelling belt, terminal box is welded in electromagnetic oscillation block upper surface, and terminal box is external power supply device.Application Areas of the present invention is wide, can effectively improve pelletizing ultimate compression strength, improves the leaching yield of gold in floatation process and iron ore is broken, the efficiency that grinds, and the present invention has extremely wide market outlook.
Description
Technical field
The present invention relates to electromagnetic oscillation processing technology field.Be specially a kind of electromagnetic oscillation treatment unit and method, it is applicable to the pelletizing industry in Iron And Steel Industry, the broken industry of gold mine mining processing industry and magnetic ore deposit.
Background technology
Iron ore pellets is the agglomeration method of a kind of granule iron concentrate that the early development of 20th century goes out, and it is the result that abundant ore source is day by day exhausted, lean ore resource develops in a large number.Along with modern blast furnace ironmaking is close to harsh requirement to concentrate, and the rise of smelting iron and steel short route, the effect of pellet in Iron And Steel Industry is further important, has become a kind of indispensable high-quality furnace refractory.But be also faced with difficulty while flourish pelletizing industry, pelletizing can cause part pelletizing to damage or efflorescence in long-distance transport and throwing stove process, directly affects metallurgical effect.The ultimate compression strength for this reason how improving pelletizing is an important topic in pelletizing industry.
The gold mine of China is widely distributed, but mostly is Indigenous Gold-bearing, and conventional ore-dressing technique has gravity treatment, flotation, amalgamate, cyaniding etc.But because the gold in most of gold mine is in height free state, be submicro gold or submicroscopic gold, grade is very low, which kind of physical method to be all difficult to the Independent Mineral obtaining gold with, Chemical Leaching method can only be adopted effectively could to extract gold.Wherein Cyanide Leaching method is good owing to leaching index, less investment, and the advantages such as cost is low, instant effect are that most of gold mine adopts.These class methods are the Au utilized in ore, the CN in the metals such as Ag and basic solution
-contact, generates Au (CN)
-, Ag (CN)
-coordination ion, add reductive agent again, displace simple substance Au, extraction time is about 40-60 hour, and the leaching yield of gold can reach 50-70%, but still has the gold of 20-30% to retain in mine tailing owing to reacting insufficient, analyze reason, wrap up too tight between part gold mine particle and gangue, fail to contact with solution, react.
The iron ore grade of China is general lower, and for North China (Inner Mongol, Hebei, Shanxi, Hebei), the grade of most mining area iron ores is about 15%.Because iron ore grade is too low, domestic iron ore dressing enterprise needs to process a large amount of raw iron ores, and just can isolate the Iron concentrate with economic worth, this causes iron ore crusher flourish.But the power consumption of crusher is very big, the factory of 2,000,000 tons of magnetic ores is processed for a year, need coarsness (40mm-80mm) crusher 1 being equipped with 160KW, 200KW medium size (3-40mm) crusher 1,200KW fine granularity (below 3mm) crusher 2.5, one section of ball mill of 400KW, 5, two sections of ball mills of 400KW.Can under guestimate, crusher works 8 hours every day, and ball mill works 24 hours every day, and within 300 days, calculate to work every year, the annual electricity charge just reach 3,000 ten thousand, and this is a no small expense.
At present, how significantly to improve pelletizing ultimate compression strength and reduce beneficiation cost and need solution badly always.
Summary of the invention
In order to solve the problem, the present inventor, through test of long duration and research, proposes a kind of electromagnetic oscillation treatment unit and method,
According to a first aspect of the present invention, provide a kind of electromagnetic oscillation treatment unit, it is made up of electromagnetic oscillation body 1-1, terminal box 1-3, travelling belt 1-4, and travelling belt 1-4 is scattered with pelletizing 1-2; Travelling belt 1-4 is between two parties through electromagnetic oscillation body 1-1, electromagnetic oscillation body 1-1 inside is wound with magnet coil, on the case weld of the electromagnetic oscillation body 1-1 U-steel frame below travelling belt 1-4, terminal box 1-3 is welded in electromagnetic oscillation body 1-1 upper surface, and terminal box 1-3 is external power supply device.
Wherein, travelling belt 1-4 speed is generally 0.55m/s.
According to a second aspect of the present invention, provide the method using above-mentioned electromagnetic oscillation treatment unit, its concrete steps are:
The first step: batching, iron ore pellets raw material generally comprise Iron concentrate, additive, binding agent form, need before batching to get rid of the inner a certain amount of moisture of Iron concentrate, prevent the excessive pelletizing that causes of humidity difficult, therefore utilize dry means to carry out removing moisture to Iron concentrate; Additive is mainly prepared for desulfurization and dephosphorization, and binding agent mainly plays the effect of bonding, absorption.
Second step: mixing, is again profit mill, generally repeatedly grinds the iron ore pellets after batching by damp mill or high-pressure roller mill.
3rd step: balling-up (pelletizing) is general by balling disc or drum pelletizer pelletizing.
4th step: screening, pelletizer green pellets granularity out differs, and the green-ball being generally less than 6mm will return to and carry out balling-up process.
5th step: cloth, utilizes electromagnetic oscillation treatment unit to be delivered to shaft furnace to the green pellets sieved out by a few road and carries out roasting.
6th step: sintering (roasting), green pellets sinters in shaft furnace, and top temperature scope is generally 1250-1300 DEG C.
7th step: sieve the pelletizing after roasting, diameter is more than or equal to 5mm(millimeter) and the pelletizing being less than 8mm (millimeter) is finished product;
8th step: 5mm(millimeter is less than to diameter) pelletizing re-start fine grinding after prepare burden; Again cloth is carried out to the pelletizing that diameter is between 8-15mm.
According to a third aspect of the present invention, a kind of electromagnetic oscillation treatment unit is provided, it is the Cyanide Leaching electromagnetic oscillation device for gold, and described electromagnetic oscillation treatment unit is made up of magnet coil 3-1, fuel tank 3-2, oil pipe 3-3, ore slurry pipeline 3-4, heat-removal system 3-5; Wherein magnet coil 3-1 is wrapped on ore slurry pipeline 3-4 outside surface, for forming magnetic field in ore slurry pipeline inside; Magnet coil 3-1 will through vacuum impregnation process, and oil pipe 3-3 welds with being between fuel tank 3-2 and heat-removal system 3-5; Heat-removal system 3-5 is positioned at the bottom of the Cyanide Leaching electromagnetic oscillation device of this gold, is namely in magnet coil 3-1, fuel tank 3-2, oil pipe 3-3, ore slurry pipeline 3-4 bottom; Ore slurry pipeline 3-4 is horizontal through the draw-in groove of rectangular parallelepiped, and fuel tank 3-2 is welded on oil pipe 3-3 top, and oil pipe 3-3 passes perpendicularly through rectangular parallelepiped draw-in groove and is connected to heat-removal system 3-5.Fuel tank 3-2 mainly plays the oil volume that is heated and increases, and for oil provides the effect of cushioning pocket, the circulation of its not participation oil, heat-removal system 3-5 inside is alopecia areata heat-exchange system.
According to a fourth aspect of the present invention, provide the method for the Cyanide Leaching electromagnetic oscillation device using gold, its concrete steps are:
The first step: raw ore (gold mine) material prepares, and general granularity is 30-50mm.
Second step: grinding, after grinding, granularity requirements is less than or equal to 200 orders.
3rd step: size mixing, adds CaO and sizes mixing, and the value controlling the PH of ore pulp is greater than 12, and in order to suppress the hydrolysis of HCN, reaction equation is NaCN+H
2o=NaOH+HCN.
4th step: by electromagnetic oscillation process, becomes loose by ore particle further.Be beneficial between next step NaCN and Au and react more fully.
5th step: Cyanide Leaching, adds NaCN, reaction equation is 2Au+NaCN+H2O2=2NaAu(CN) 2+2NaOH, be separated displacement, after adding Zn, replaceable go out gold
6th step: filtration treatment, carries out filtration treatment to the slurries of the 5th process, is separated and obtains your liquid and mine tailing.
According to a fifth aspect of the present invention, provide a kind of electromagnetic oscillation treatment unit, it is made up of the second electromagnetic oscillation body 5-4, the second terminal box 5-2, the second travelling belt 5-3, and the second travelling belt 5-3 is scattered with the second pelletizing 5-1; Second travelling belt 5-3 is between two parties through the second electromagnetic oscillation body 5-4, second electromagnetic oscillation body 5-4 inside is wound with magnet coil, on the case weld of the second electromagnetic oscillation body 5-4 U-steel frame below the second travelling belt 5-3, second terminal box 5-2 is welded in the second electromagnetic oscillation body 5-4 upper surface, and the second terminal box 5-2 is external power supply device.
Wherein, the second travelling belt 5-3 speed is no more than 4.5m/s.Iron ore 5-1 coarse crushing Task-size Controlling is at below 200mm
According to a sixth aspect of the present invention, provide the method used for the electromagnetic oscillation treatment unit of iron ore, its concrete steps are:
The first, the fragmentation of iron ore, this comprise coarse crushing, in broken, in small, broken bits, rear granularity in small, broken bits is more than 5mm;
The second, ball milling, this comprises ball milling one section and ball milling two sections, and before entering ore dressing, granularity is generally 0.074-5mm;
Wherein, after in small, broken bits, ball milling one section, ball milling two sections, all screening is set; In addition, coarse crushing and in broken between electromagnetic oscillation process is set, and electromagnetic oscillation process is set after screening in small, broken bits, in addition electromagnetic oscillation process is set after the screening of ball milling one section.
The beneficial effect of technical solution of the present invention is: first, in the immovable situation of original technique, introduce this technology, the treatment capacity of crusher on average can improve 15%-20%, and the treatment capacity of ball mill on average can improve 23%-35%, second, if treatment capacity does not change, select factory with what start that citing processes 2,000,000 tons of raw ores year, the power consumption of crusher 15%-20% can be reduced, and 2 table grinders can be saved.Especially be apparent that: this process application electromagnetic oscillation treatment technology, improves the ultimate compression strength of pelletizing, improve the cyanide leaching of gold mine, the fragmentation in magnetic ore deposit, grind efficiency.
Accompanying drawing explanation
Fig. 1 is that electromagnetic oscillation process green pellets is on-the-spot;
Fig. 2 is the technical process of electromagnetic oscillation process green pellets;
Fig. 3 is Cyanide Leaching electromagnetic oscillation device;
Fig. 4 is the cyaniding and leaching process process of electromagnetic oscillation process gold mine;
Fig. 5 is that electromagnetic oscillation process iron ore is on-the-spot;
Fig. 6 is that electromagnetic oscillation process iron ore is broken, grinding process flow process.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In accompanying drawing 1-6, it is as follows that accompanying drawing identifies corresponding instruction: 1-1 is electromagnetic oscillation body, 1-2 pelletizing, and 1-3 is terminal box, and 1-4 is travelling belt.3-1 is magnet coil, and 3-2 is fuel tank, and 3-3 is oil pipe, and 3-4 is ore slurry pipeline, and 3-5 is heat-removal system.5-1 is iron ore, and 5-2 is terminal box, and 5-3 is travelling belt, and 5-4 is electromagnetic oscillation body.
Electromagnetic oscillation device disclosed in this invention is installed on material (such as, gold mine slurry solution etc. after green pellets, iron ore, interpolation NaCN) on transportation route, a rational working point is selected, to reaching the electromagnetic oscillation treatment effect of expection by the magneticstrength of frequency modulation and adjustment electromagnetic oscillation device.The principle of work of concrete utilization is as follows respectively:
1) in pelletizing plant, electromagnetic oscillation treatment technology general action in green-ball screening operation after, before cloth material process, this section of transfer rate is slower, line speed 0.55m/s-1m/s, and this stage, green-ball has certain ultimate compression strength being about 100N-200N, be suitable for carrying out magnetic field treatment, the regulating impulse frequency of electromagnetic oscillation device is 500Hz-800Hz, and background magnetic induction density is adjusted to 0.8T-1T, and the green-ball processed enters sintering through cloth, carry out crystallization and solid phase consolidation, final balling-up.
2), in gold ore flotation technique, electromagnetic oscillation treatment technology is generally before acting on Cyanide Leaching and after sizing mixing; When sizing mixing, the parameter of adding medicine is generally NaCN(8kg/t(kg/ton)), CaO(6.6kg/t(kg/ton)), pulp density is 35%-40%.Due to Au(gold) susceptibility lower, insensitive to magnetic field reaction, higher pulse-repetition and higher background magnetic field intensity (compared to pellet formation) must be adopted, Au and gangue just can form gap, the frequency of now regulating impulse is about (1000-1400) Hz, background magnetic induction density is about (1-1.2) T, and ore pulp solution is under the effect of high frequency upfield, and Cyanide Leaching effect will significantly improve.
3) electromagnetic oscillation treatment technology can be used for multiple links that iron ore is broken and grind, as: after coarse crushing, in broken before; After in small, broken bits, before one section of ball milling; Between ball milling one section and ball milling two sections.According to the difference of ore grain size, regulate different pulse-repetitioies and background magnetic induction density.Ore particles is larger, and frequency should be larger, and background magnetic induction density should be higher.Process iron ore frequency is about (1500-1800) Hz, magnetic induction density is about (2-2.3) T.
Specifically technical scheme of the present invention is described by reference to the accompanying drawings as follows:
As shown in Figure 1, the scene of the electromagnetic oscillation device process green pellets shown in accompanying drawing 1, it is mainly electromagnetic oscillation treatment unit, and this electromagnetic oscillation treatment unit is made up of electromagnetic oscillation body 1-1, terminal box 1-3, travelling belt 1-4, and travelling belt 1-4 is scattered with pelletizing 1-2; Travelling belt 1-4 is between two parties through electromagnetic oscillation body 1-1, electromagnetic oscillation body 1-1 inside is wound with magnet coil, on the case weld of the electromagnetic oscillation body 1-1 U-steel frame below travelling belt 1-4, terminal box 1-3 is welded in electromagnetic oscillation body 1-1 upper surface, and terminal box 1-3 is external power supply device.
In the use procedure of electromagnetic oscillation device, can detect that applied electric current is the electric current of an alternation by the oscilloscope connecting the terminal stud in terminal box 1-3, can detect that the magnetic field of electromagnetic oscillation body 1-1 inner chamber (above belt) is alternating magnetic field by exchanging gaussmeter, pulse-repetition is generally 500-800Hz, and background magnetic induction density is 0.8-1T.
As shown in Figure 2, attachedly Figure 2 shows that the technical process of electromagnetic oscillation process green pellets, its concrete steps are:
The first step: batching, iron ore pellets raw material generally comprise Iron concentrate, additive, binding agent form, need before batching to get rid of the inner a certain amount of moisture of Iron concentrate, prevent the excessive pelletizing that causes of humidity difficult, therefore utilize dry means to carry out removing moisture to Iron concentrate; Additive is mainly prepared for desulfurization and dephosphorization, and binding agent mainly plays the effect of bonding, absorption.
Second step: mixing, is again profit mill, generally repeatedly grinds the iron ore pellets after batching by damp mill or high-pressure roller mill.
3rd step: balling-up (pelletizing) is general by balling disc or drum pelletizer pelletizing.
4th step: screening, pelletizer green pellets granularity out differs, and the green-ball being generally less than 6mm will return to and carry out balling-up process.
5th step: cloth, utilizes electromagnetic oscillation treatment unit to be delivered to shaft furnace to the green pellets sieved out by a few road and carries out roasting.
6th step: sintering (roasting), green pellets sinters in shaft furnace, and top temperature scope is generally 1250-1300 DEG C.
7th step: sieve the pelletizing after roasting, diameter is more than or equal to 5mm(millimeter) and the pelletizing being less than 8mm (millimeter) is finished product;
8th step: 5mm(millimeter is less than to diameter) pelletizing re-start fine grinding after prepare burden; Again cloth is carried out to the pelletizing that diameter is between 8-15mm.
Electromagnetic oscillation device is arranged on the front end of cloth material process, and major cause is not too low also not high at this stage pellet strength, and be generally about 200N, processing cost is moderate, and treatment effect is better.
As shown in Figure 3, accompanying drawing 3 is the Cyanide Leaching electromagnetic oscillation device of gold, and this device is made up of magnet coil 3-1, fuel tank 3-2, oil pipe 3-3, ore slurry pipeline 3-4, heat-removal system 3-5; Wherein magnet coil 3-1 is wrapped on ore slurry pipeline 3-4 outside surface, for forming magnetic field in ore slurry pipeline inside; Magnet coil 3-1 will through vacuum impregnation process, and oil pipe 3-3 welds with being between fuel tank 3-2 and heat-removal system 3-5; Heat-removal system 3-5 is positioned at the bottom of the Cyanide Leaching electromagnetic oscillation device of this gold, is namely in magnet coil 3-1, fuel tank 3-2, oil pipe 3-3, ore slurry pipeline 3-4 bottom; Ore slurry pipeline 3-4 is horizontal through the draw-in groove of rectangular parallelepiped, and fuel tank 3-2 is welded on oil pipe 3-3 top, and oil pipe 3-3 passes perpendicularly through rectangular parallelepiped draw-in groove and is connected to heat-removal system 3-5.Fuel tank 3-2 mainly plays the oil volume that is heated and increases, and for oil provides the effect of cushioning pocket, the circulation of its not participation oil, heat-removal system 3-5 inside is alopecia areata heat-exchange system.Magnet coil 3-1 can provide the radiating effect of great hot magnetic field and heat-removal system 3-5 closely bound up, and radiating effect is bad, can reduce the magnetic field of ore slurry pipeline 3-4 inside.
As shown in Figure 4, accompanying drawing 4 is the cyaniding and leaching process process of electromagnetic oscillation process gold mine, and its concrete steps are:
The first step: raw ore (gold mine) material prepares, and general granularity is 30-50mm.
Second step: grinding, after grinding, granularity requirements is less than or equal to 200 orders.
3rd step: size mixing, adds CaO and sizes mixing, and the value controlling the PH of ore pulp is greater than 12, and in order to suppress the hydrolysis of HCN, reaction equation is NaCN+H
2o=NaOH+HCN.
4th step: by electromagnetic oscillation process, becomes loose by ore particle further.Be beneficial between next step NaCN and Au and react more fully.
5th step: Cyanide Leaching, adds NaCN, reaction equation is 2Au+NaCN+H2O2=2NaAu(CN) 2+2NaOH, be separated displacement, after adding Zn, replaceable go out gold
6th step: filtration treatment, carries out filtration treatment to the slurries of the 5th process, is separated and obtains your liquid and mine tailing.
As shown in Figure 5, accompanying drawing 5 is the scene of electromagnetic oscillation device process iron ore, and electromagnetic oscillation device is made up of the second electromagnetic oscillation body 5-4, the second terminal box 5-2, the second travelling belt 5-3, and the second travelling belt 5-3 is scattered with the second pelletizing 5-1; Second travelling belt 5-3 is between two parties through the second electromagnetic oscillation body 5-4, second electromagnetic oscillation body 5-4 inside is wound with magnet coil, on the case weld of the second electromagnetic oscillation body 5-4 U-steel frame below the second travelling belt 5-3, second terminal box 5-2 is welded in the second electromagnetic oscillation body 5-4 upper surface, and the second terminal box 5-2 is external power supply device.In the apparatus, iron ore 5-1 coarse crushing Task-size Controlling at below 200mm, better effects if.Terminal box is external power supply device 5-2, the second travelling belt 5-3 speed no more than 4.5m/s,
The electromagnetic oscillation device 1-1 equipment profile processing the process green pellets shown in iron ore electromagnetic oscillation device 5-4 and Fig. 1 shown in Fig. 5 is substantially similar, difference is that the electromagnetic oscillation equipment 5-4 processing iron ore is larger than the electromagnetic oscillation device 1-1 of process green pellets, be wound around more insulated wire, larger electric current can be passed into like this, obtain larger energy, the magnetic field that process green pellets needs is (0.8-1) T, and the magnetic field processing iron ore is 2-2.3T, because the speed of the granularity of green pellets and iron ore and belt conveyor is all different.Raw material granularity is large, and belt speed is fast, and the energy so needed must be large.Simultaneously due to many coilings, housing area also increases, and also meets high cooling requirements.
Accompanying drawing 6 is that electromagnetic oscillation process iron ore is broken, grinding process flow process.The concrete steps of this technique are:
The first, the fragmentation of iron ore, this comprise coarse crushing, in broken, in small, broken bits, rear granularity in small, broken bits is more than 5mm;
The second, ball milling, this comprises ball milling one section and ball milling two sections, and before entering ore dressing, granularity is generally 0.074-5mm;
Wherein, after in small, broken bits, ball milling one section, ball milling two sections, all screening is set; In addition, coarse crushing and in broken between electromagnetic oscillation process is set, and electromagnetic oscillation process is set after screening in small, broken bits, in addition electromagnetic oscillation process is set after the screening of ball milling one section.
Because the granularity of iron ore is larger, the speed of conveying belt is also very fast, broken and grind and flow process will arrange several electromagnetic oscillation device more just can obtain desirable crushing effect, the coarse crushing stage, general Magnetic control was at 2-2.3T, and the stage of grinding can reduce magnetic field slightly to 1.8T.
Electromagnetic oscillation treatment process of the present invention is further described below: technical applications of the present invention is wide, can effectively improves pelletizing ultimate compression strength, the leaching yield of gold in floatation process and iron ore is broken, the efficiency that grinds.Theoretical basis is that w is proportional to f × B, and wherein w is energy of rupture, Characterization Energy size.F is acting frequency, and sign effect number of times is how many.B is background magnetic induction density, and characterizing particles is subject to the size of reactive force.
F × B product is little, and material inside can produce defect (defect can obviously move in the case of a high temperature), and f × B product is large, and object produces slight crack, even broken.The size of B and f of paper adjustment is herein to being applied to the requirement of different field.Set forth for three aspect application involved in the present invention respectively below.
1) in process green pellets, generally on green-ball travelling belt, an electromagnetic oscillation device (as shown in Figure 1) is installed.
The first, the ultimate compression strength due to green pellets is general lower, should not adopt very high background magnetic field, and by adjustment electric current, the background magnetic induction density of generally having an effect is (0.8-1) T.
The second, experiment proves for iron ore pellets, acting frequency is generally (500-800) Hz successful, should not continue to increase frequency, otherwise pelletizing can be made to occur breaking.
3rd, pelletizing is under rational (frequency, magnetic field) action of alternating magnetic field, subsurface defect (room) increases, from solid state physics angle analysis, defect (room) can be subjected to displacement, along with the rising of temperature, Void diffusing is more obvious, this facilitates in pellet sintering process greatly, the phase mutual diffusion between each component of pelletizing, solid phase consolidation.Thus improve pelletizing ultimate compression strength.
Experiment effect: first, in the constant situation of original technique, after adopting electromagnetic oscillation technical finesse, pelletizing mean compressive strength improves 20%-30%, as: be 2000N for directly throwing the pelletizing average ultimate compression strength of stove, after this technical finesse, mean compressive strength can reach (2400N-2600) N, and this almost reaches the pelletizing compressive strength standard 2500N that will carry out transporting for long-distance.The second, can reduce the 3%-5% into stove iron concentrate grade, most high sintering temperature reduces (160-200) DEG C, still can sinter out the pelletizing of same ultimate compression strength.
2) in gold mine cyaniding leaching, on flow of slurry path, electromagnetic oscillation device (as shown in Figure 2) is installed.
The first, because gold is paramagnetic substance, want to obtain larger magnetic field force, need the size improving background magnetic induction density, meanwhile, also need increasing effect number of times.Usual frequency setting (1000-1400) Hz, background magnetic induction density is (1-1.2) T.
The second, the high-frequency alternating magnetic field of applying can make to produce gap between goldc grains and gangue, and such goldc grains just can fully contact with NaCN solution, and react more fully, leaching yield is largely increased.After this technical finesse, the cyanide leaching of gold can improve 12%-23%.
3) in the fragmentation of magnetic ore deposit, grinding, generally on Ore Transportation path, an electromagnetic oscillation device (as shown in Figure 3) is installed.
First, because the individuality of iron ore is comparatively large, obtain large energy of rupture w if want, acting frequency and background magnetic induction density parameter need increase greatly, (1500-1800) HZ is generally to the frequency of alternating magnetic field that magnetic ore applies, magnetic induction density reaches (2-2.3) T.
The second, powerful action of alternating magnetic field, on iron ore, can make iron ore entirety crack, if broken, grind operation and introduce this technology, greatly can improve the treatment capacity of crusher and ball mill.
Industrial applicibility: first, in the immovable situation of original technique, introduce this technology, the treatment capacity of crusher on average can improve 15%-20%, and the treatment capacity of ball mill on average can improve 23%-35%, second, if treatment capacity does not change, select factory with what start that citing processes 2,000,000 tons of raw ores year, the power consumption of crusher 15%-20% can be reduced, and 2 table grinders can be saved.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (3)
1. an electromagnetic oscillation treatment process, its electromagnetic oscillation treatment unit used is made up of electromagnetic oscillation body (1-1), terminal box (1-3), travelling belt (1-4), and travelling belt (1-4) is scattered with pelletizing (1-2); Travelling belt (1-4) is between two parties through electromagnetic oscillation body (1-1), electromagnetic oscillation body (1-1) inside is wound with magnet coil, the case weld of electromagnetic oscillation body (1-1) is on the U-steel frame of travelling belt (1-4) below, terminal box (1-3) is welded in electromagnetic oscillation body (1-1) upper surface, and terminal box (1-3) is external power supply device; Travelling belt (1-4) speed is 0.55m/s;
Described electromagnetic oscillation treatment process comprises the following steps:
The first step: batching, the raw material of iron ore pellets is made up of Iron concentrate, additive, binding agent, needs to get rid of the inner a certain amount of moisture of Iron concentrate before batching, prevents the excessive pelletizing that causes of humidity difficult, therefore utilizes dry means to carry out removing moisture to Iron concentrate; Additive is mainly prepared for desulfurization and dephosphorization, and binding agent mainly plays the effect of bonding, absorption;
Second step: mixing, is again profit mill, repeatedly grinds the iron ore pellets after batching by damp mill or high-pressure roller mill;
3rd step: balling-up, by balling disc or drum pelletizer pelletizing;
4th step: screening, pelletizer green pellets granularity out differs, and the green-ball being less than 6mm will return to and carry out balling-up process;
5th step: cloth, utilizes electromagnetic oscillation treatment unit to be delivered to shaft furnace to the green pellets sieved out by a few road and carries out roasting;
6th step: sintering, green pellets sinters in shaft furnace, and top temperature scope is 1250-1300 DEG C;
7th step: the pelletizing after roasting is sieved, diameter is more than or equal to 5mm and the pelletizing being less than 8mm is finished product;
8th step: prepare burden after the pelletizing being less than 5mm to diameter re-starts fine grinding; Again cloth is carried out to the pelletizing that diameter is between 8-15mm.
2. an electromagnetic oscillation treatment process, its electromagnetic oscillation treatment unit used is the Cyanide Leaching electromagnetic oscillation device for gold, and described electromagnetic oscillation treatment unit is made up of magnet coil (3-1), fuel tank (3-2), oil pipe (3-3), ore slurry pipeline (3-4), heat-removal system (3-5); Wherein magnet coil (3-1) is wrapped on ore slurry pipeline (3-4) outside surface, for forming magnetic field in ore slurry pipeline inside; Magnet coil (3-1) will through vacuum impregnation process, and oil pipe (3-3) welds with being between fuel tank (3-2) and heat-removal system (3-5); Heat-removal system (3-5) is positioned at the bottom of the Cyanide Leaching electromagnetic oscillation device of this gold, is namely in magnet coil (3-1), fuel tank (3-2), oil pipe (3-3), ore slurry pipeline (3-4) bottom; Ore slurry pipeline (3-4) is horizontal through the draw-in groove of rectangular parallelepiped, and fuel tank (3-2) is welded on oil pipe (3-3) top, and oil pipe (3-3) passes perpendicularly through rectangular parallelepiped draw-in groove and is connected to heat-removal system (3-5); Fuel tank (3-2) mainly plays the oil volume that is heated and increases, for oil provides the effect of cushioning pocket, and the circulation of its not participation oil, heat-removal system (3-5) inside is alopecia areata heat-exchange system;
Described electromagnetic oscillation treatment process comprises following concrete steps:
The first step: raw ore material prepares, and granularity is 30-50mm;
Second step: grinding, after grinding, granularity requirements is less than or equal to 200 orders;
3rd step: size mixing, adds CaO and sizes mixing, and the value controlling the PH of ore pulp is greater than 12, and in order to suppress the hydrolysis of HCN, reaction equation is NaCN+H
2o=NaOH+HCN;
4th step: by electromagnetic oscillation process, becomes loose by ore particle further; Be beneficial between next step NaCN and Au and react more fully;
5th step: Cyanide Leaching, adds NaCN, reaction equation is 2Au+4NaCN+H
2o
2=2NaAu (CN)
2+ 2NaOH, be separated displacement, after adding Zn, replaceable go out gold;
6th step: filtration treatment, carries out filtration treatment to the slurries of the 5th step process, is separated and obtains your liquid and mine tailing.
3. an electromagnetic oscillation treatment process, its electromagnetic oscillation treatment unit used is made up of the second electromagnetic oscillation body (5-4), the second terminal box (5-2), the second travelling belt (5-3), and the second travelling belt (5-3) is scattered with iron ore (5-1); Second travelling belt (5-3) is between two parties through the second electromagnetic oscillation body (5-4), second electromagnetic oscillation body (5-4) inside is wound with magnet coil, the case weld of the second electromagnetic oscillation body (5-4) is on the U-steel frame of the second travelling belt (5-3) below, second terminal box (5-2) is welded in the second electromagnetic oscillation body (5-4) upper surface, and the second terminal box (5-2) is external power supply device; Wherein the second travelling belt (5-3) speed is no more than 4.5m/s, and iron ore coarse crushing Task-size Controlling is at below 200mm;
Described electromagnetic oscillation treatment process comprises the following steps:
The first, the fragmentation of iron ore, this comprise coarse crushing, in broken, in small, broken bits, rear granularity in small, broken bits is more than 5mm;
The second, ball milling, this comprises ball milling one section and ball milling two sections, and before entering ore dressing, granularity is 0.074-5mm;
Wherein, after in small, broken bits, ball milling one section, ball milling two sections, all screening is set; In addition, coarse crushing and in broken between electromagnetic oscillation process is set, and electromagnetic oscillation process is set after screening in small, broken bits, in addition electromagnetic oscillation process is set after the screening of ball milling one section.
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