CN103436692A - Electromagnetic oscillation processing device and processing method - Google Patents
Electromagnetic oscillation processing device and processing method Download PDFInfo
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- CN103436692A CN103436692A CN2013103900017A CN201310390001A CN103436692A CN 103436692 A CN103436692 A CN 103436692A CN 2013103900017 A CN2013103900017 A CN 2013103900017A CN 201310390001 A CN201310390001 A CN 201310390001A CN 103436692 A CN103436692 A CN 103436692A
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Abstract
The invention discloses an electromagnetic oscillation processing device and a processing method. The electromagnetic oscillation processing device consists of an electromagnetic oscillation machine body, a junction box and a conveying belt, wherein pellets are scattered on the conveying belt; the conveying belt passes through the middle of the electromagnetic oscillation machine body; an excitation coil is wound inside the electromagnetic oscillation machine body; a shell of the electromagnetic oscillation machine body is welded on a groove steel frame below the conveying belt; the junction box is welded on the upper surface of the electromagnetic oscillation machine body, and the junction box is an external power supply device. The application range is wide, the compression resistance of the pellets can be effectively enhanced, the leaching rate of gold in a flotation technology as well as the crushing efficiency and the grinding efficiency of iron ore can be raised, and the processing device and the processing method have very broad market prospects.
Description
Technical field
The present invention relates to the 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 in 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 of going out of 20th century early development, and it is that abundant ore source is day by day exhausted, a large amount of results that develop of lean ore resource.Along with modern blast furnace ironmaking is close to harsh requirement to concentrate, and the rise of the short flow process of smelting iron and steel, the effect of pellet in Iron And Steel Industry is further important, has become a kind of indispensable high-quality furnace refractory.But also be faced with difficulty in the time of flourish pelletizing industry, pelletizing can cause the part pelletizing to damage or efflorescence in long-distance transport and in throwing the stove process, directly affects metallurgical effect.The ultimate compression strength that for this reason how to improve pelletizing is an important topic in pelletizing industry.
The gold mine of China is widely distributed, but mostly is Indigenous Gold-bearing, and ore-dressing technique commonly used has gravity treatment, flotation, amalgamate, cyaniding etc.But because the gold in most of gold mine is the height free state, be inferior micro-gold or submicroscopic gold, grade is very low, which kind of physical method all to be difficult to obtain golden Independent Mineral with, can only adopt the Chemical Leaching method could effectively extract gold.Wherein the Cyanide Leaching method is good owing to leaching index, less investment, and cost is low, and the advantages such as instant effect are that most of gold mines adopt.CN in the metals such as these class methods are the Au that utilize in ore, Ag and basic solution
-contact, generate Au (CN)
-, Ag (CN)
-coordination ion, add again reductive agent, displace simple substance Au, extraction time is about 40-60 hour, and the leaching yield of gold can reach 50-70%, still still has the gold of 20-30% due to insufficient the retaining in mine tailing of reaction, analyze reason, between part gold mine particle and gangue, parcel is too tight, fails to contact with solution, reacts.
The iron ore grade of China is generally lower, and take North China (Inner Mongol, Hebei, Shanxi, Hebei) is example, and the grade of most mining area iron ores is in 15% left and right.Because iron ore grade is too low, domestic iron ore dressing enterprise need to process a large amount of raw iron ores, just can isolate the iron fine powder with economic worth, and this causes the iron ore crusher flourish.But the power consumption of crusher is very big, take the factory that processes 2,000,000 tons of magnetic ores a year is example, 1 of coarsness (the 40 mm-80 mm) crusher of needs outfit 160KW, 1 of 200KW medium size (3-40mm) crusher, 2 of 200KW fine granularity (3mm is following) crushers.5, one section ball mill of 400KW, 5, two sections ball mills of 400KW.Under can guestimate, crusher be worked 8 hours every day, and ball mill is worked 24 hours every day, to work every year, within 300 days, calculates, and 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 always badly.
Summary of the invention
In order to address the above problem, the 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, a kind of electromagnetic oscillation treatment unit is provided, it consists of electromagnetic oscillation body 1-1, terminal box 1-3, travelling belt 1-4, is scattered with pelletizing 1-2 on travelling belt 1-4; 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 housing of electromagnetic oscillation body 1-1 is welded 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.
Wherein, travelling belt 1-4 speed is generally 0.55m/s.
According to a second aspect of the present invention, the method for using above-mentioned electromagnetic oscillation treatment unit is provided, its concrete steps are:
The first step: batching, iron ore pellets raw material generally comprise iron fine powder, additive, binding agent and form, need to get rid of the inner a certain amount of moisture of iron fine powder before batching, prevent the excessive pelletizing difficulty that causes of humidity, therefore utilize dry means to be removed moisture to the iron fine powder; Additive is mainly to prepare for desulfurization and dephosphorization, and binding agent mainly plays the effect of bonding, absorption.
Second step: mix, make again profit grind, generally by damp mill or high-pressure roller mill, repeatedly grind the iron ore pellets after batching.
The 3rd step: balling-up (pelletizing), generally by balling disc or drum pelletizer pelletizing.
The 4th step: screening, pelletizer green pellets granularity out differs, and the green-ball that is generally less than 6mm will return to and carry out the balling-up processing.
The 5th step: cloth, utilize the electromagnetic oscillation treatment unit to be delivered to shaft furnace to the green pellets sieved out by several roads and carry out roasting.
The 6th step: sintering (roasting), green pellets carries out sintering in shaft furnace, and the top temperature scope is generally 1250-1300 ℃.
The 7th step: the pelletizing after roasting is sieved, and diameter is more than or equal to the 5mm(millimeter) and the pelletizing that is less than 8mm (millimeter) be finished product;
The 8th step: diameter is less than to the 5mm(millimeter) after re-starting fine grinding, pelletizing prepared burden; Pelletizing to diameter between 8-15mm carries out cloth again.
According to a third aspect of the present invention, a kind of electromagnetic oscillation treatment unit is provided, it is that described electromagnetic oscillation treatment unit consists of magnet coil 3-1, fuel tank 3-2, oil pipe 3-3, ore slurry pipeline 3-4, heat-removal system 3-5 for golden Cyanide Leaching electromagnetic oscillation device; Wherein magnet coil 3-1 is wrapped on ore slurry pipeline 3-4 outside surface, in ore slurry pipeline inside, forming magnetic field; Magnet coil 3-1 will process through vacuum impregnation, between oil pipe 3-3 and fuel tank 3-2 and heat-removal system 3-5, is welding; Heat-removal system 3-5 is positioned at the bottom of this golden Cyanide Leaching electromagnetic oscillation device, in magnet coil 3-1, fuel tank 3-2, oil pipe 3-3, ore slurry pipeline 3-4 bottom; Ore slurry pipeline 3-4 level is 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 vertically is connected in heat-removal system 3-5 through the rectangular parallelepiped draw-in groove.Fuel tank 3-2 mainly plays the oil volume that is heated and increases, and for oil provides the effect of cushioning pocket, it is the circulation of participation oil not, and heat-removal system 3-5 inside is the alopecia areata heat-exchange system.
According to a fourth aspect of the present invention, the method for using golden Cyanide Leaching electromagnetic oscillation device is provided, its concrete steps are:
The first step: raw ore (gold mine) material is prepared, and general granularity is 30-50mm.
Second step: grind, after grinding, granularity requirements is less than or equal to 200 orders.
The 3rd step: size mixing, add CaO to size mixing, the value of 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.
The 4th step: process by electromagnetic oscillation, further ore particle is become to loose.Be beneficial between next step NaCN and Au and react more fully.
The 5th step: Cyanide Leaching, add NaCN, reaction equation is 2Au+NaCN+H2O2=2NaAu(CN) 2+2NaOH, separate displacement, after adding Zn, replaceablely go out gold
The 6th step: filtration treatment, the slurries of the 5th processing are carried out to filtration treatment, separate and obtain your liquid and mine tailing.
According to a fifth aspect of the present invention, a kind of electromagnetic oscillation treatment unit is provided, it consists of the second electromagnetic oscillation body 5-4, the second terminal box 5-2, the second travelling belt 5-3, is scattered with the second pelletizing 5-1 on the second travelling belt 5-3; The second travelling belt 5-3 is between two parties through the second electromagnetic oscillation body 5-4, the second electromagnetic oscillation body 5-4 inside is wound with magnet coil, the housing of the second electromagnetic oscillation body 5-4 is welded on the U-steel frame of the second travelling belt 5-3 below, the 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 granularity is controlled at below 200mm
According to a sixth aspect of the present invention, the method for using for the electromagnetic oscillation treatment unit of iron ore is provided, 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 two sections of one section of ball milling and ball millings, enter ore dressing before granularity be generally 0.074-5mm;
Wherein, after two sections of in small, broken bits, one section of ball milling, ball millings, screening all is set; In addition, coarse crushing and in electromagnetic oscillation be set between broken process, and electromagnetic oscillation be set after screening in small, broken bits process, the electromagnetic oscillation processing is set with ining addition after the screening of one section of ball milling.
The beneficial effect of technical solution of the present invention is: first, in the immovable situation of original technique, introduce present technique, 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, process for example the factory that selects of 2,000,000 tons of raw ores year with beginning, can reduce the power consumption of crusher 15%-20%, and can save 2 table grinders.Especially be apparent that: this process application electromagnetic oscillation treatment technology, improved the ultimate compression strength of pelletizing, improved the cyanide leaching of gold mine, the fragmentation in magnetic ore deposit, grind efficiency.
The accompanying drawing explanation
Fig. 1 is that electromagnetic oscillation is processed the green pellets scene;
Fig. 2 is that electromagnetic oscillation is processed the green pellets technical process;
Fig. 3 is Cyanide Leaching electromagnetic oscillation device;
Fig. 4 is the cyaniding and leaching process process that electromagnetic oscillation is processed gold mine;
Fig. 5 is that electromagnetic oscillation is processed the iron ore scene;
Fig. 6 is that electromagnetic oscillation is processed iron ore fragmentation, grinding process flow process.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
In accompanying drawing 1-6, it is as follows that accompanying drawing identifies corresponding indication: 1-1 is the electromagnetic oscillation body, the 1-2 pelletizing, and 1-3 is terminal box, 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 the electromagnetic oscillation body.
Electromagnetic oscillation device disclosed in this invention (for example is installed on material, gold mine slurry solution after green pellets, iron ore, interpolation NaCN etc.) on transportation route, magneticstrength by frequency modulation and adjusting electromagnetic oscillation device is selected a rational working point, to reaching the electromagnetic oscillation treatment effect of expection.The concrete principle of work of utilizing is as follows respectively:
1) in pelletizing plant, electromagnetic oscillation treatment technology general action is after green-ball screening operation, before the cloth material process, this section transfer rate is slower, line speed 0.55 m/s-1m/s, and this stage, green-ball has certain ultimate compression strength that is about 100N-200N, the suitable magnetic field treatment of carrying out, the regulating impulse frequency of electromagnetic oscillation device is 500 Hz-800Hz, and background magnetic induction density is adjusted to 0.8T-1T, and the green-ball of handling enters sintering through cloth, carry out crystallization and solid phase fixed, final balling-up.
2), in gold ore flotation technique, the electromagnetic oscillation treatment technology is generally before acting on Cyanide Leaching and after sizing mixing; While sizing mixing, the parameter of adding medicine is generally the NaCN(8kg/t(kg/ton)), the CaO(6.6kg/t(kg/ton)), pulp density is 35%-40%.Due to the Au(gold) susceptibility lower, insensitive to the magnetic field reaction, must adopt higher pulse-repetition and higher background magnetic field intensity (than pellet formation), 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 the Cyanide Leaching effect will obviously improve.
3) the electromagnetic oscillation treatment technology can be used for a plurality of links that iron ore is broken and grind, as: after coarse crushing, in broken before; After in small, broken bits, before one section ball milling; Between two sections of one section of ball milling and ball millings.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 the iron ore frequency and be about (1500-1800) Hz, magnetic induction density is about (2-2.3) T.
Technical scheme of the present invention is specifically described by reference to the accompanying drawings as follows:
As shown in Figure 1, electromagnetic oscillation device shown in accompanying drawing 1 is processed the scene of green pellets, it is mainly the electromagnetic oscillation treatment unit, and this electromagnetic oscillation treatment unit consists of electromagnetic oscillation body 1-1, terminal box 1-3, travelling belt 1-4, is scattered with pelletizing 1-2 on travelling belt 1-4; 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 housing of electromagnetic oscillation body 1-1 is welded 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.
In the use procedure of electromagnetic oscillation device, can detect by the oscilloscope that connects the terminal stud in terminal box 1-3 the electric current that applied electric current is an alternation, the magnetic field that can detect electromagnetic oscillation body 1-1 inner chamber (belt top) by exchanging gaussmeter is alternating magnetic field, pulse-repetition is generally 500-800Hz, and background magnetic induction density is 0.8-1T.
As shown in Figure 2, accompanying drawing 2 is depicted as electromagnetic oscillation and processes the green pellets technical process, and its concrete steps are:
The first step: batching, iron ore pellets raw material generally comprise iron fine powder, additive, binding agent and form, need to get rid of the inner a certain amount of moisture of iron fine powder before batching, prevent the excessive pelletizing difficulty that causes of humidity, therefore utilize dry means to be removed moisture to the iron fine powder; Additive is mainly to prepare for desulfurization and dephosphorization, and binding agent mainly plays the effect of bonding, absorption.
Second step: mix, make again profit grind, generally by damp mill or high-pressure roller mill, repeatedly grind the iron ore pellets after batching.
The 3rd step: balling-up (pelletizing), generally by balling disc or drum pelletizer pelletizing.
The 4th step: screening, pelletizer green pellets granularity out differs, and the green-ball that is generally less than 6mm will return to and carry out the balling-up processing.
The 5th step: cloth, utilize the electromagnetic oscillation treatment unit to be delivered to shaft furnace to the green pellets sieved out by several roads and carry out roasting.
The 6th step: sintering (roasting), green pellets carries out sintering in shaft furnace, and the top temperature scope is generally 1250-1300 ℃.
The 7th step: the pelletizing after roasting is sieved, and diameter is more than or equal to the 5mm(millimeter) and the pelletizing that is less than 8mm (millimeter) be finished product;
The 8th step: diameter is less than to the 5mm(millimeter) after re-starting fine grinding, pelletizing prepared burden; Pelletizing to diameter between 8-15mm carries out cloth again.
The 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, is generally the 200N left and right, and processing cost is moderate, and treatment effect is better.
As shown in Figure 3, accompanying drawing 3 is golden Cyanide Leaching electromagnetic oscillation device, and this device consists 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, in ore slurry pipeline inside, forming magnetic field; Magnet coil 3-1 will process through vacuum impregnation, between oil pipe 3-3 and fuel tank 3-2 and heat-removal system 3-5, is welding; Heat-removal system 3-5 is positioned at the bottom of this golden Cyanide Leaching electromagnetic oscillation device, in magnet coil 3-1, fuel tank 3-2, oil pipe 3-3, ore slurry pipeline 3-4 bottom; Ore slurry pipeline 3-4 level is 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 vertically is connected in heat-removal system 3-5 through the rectangular parallelepiped draw-in groove.Fuel tank 3-2 mainly plays the oil volume that is heated and increases, and for oil provides the effect of cushioning pocket, it is the circulation of participation oil not, and heat-removal system 3-5 inside is the 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 processing gold mine, and its concrete steps are:
The first step: raw ore (gold mine) material is prepared, and general granularity is 30-50mm.
Second step: grind, after grinding, granularity requirements is less than or equal to 200 orders.
The 3rd step: size mixing, add CaO to size mixing, the value of 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.
The 4th step: process by electromagnetic oscillation, further ore particle is become to loose.Be beneficial between next step NaCN and Au and react more fully.
The 5th step: Cyanide Leaching, add NaCN, reaction equation is 2Au+NaCN+H2O2=2NaAu(CN) 2+2NaOH, separate displacement, after adding Zn, replaceablely go out gold
The 6th step: filtration treatment, the slurries of the 5th processing are carried out to filtration treatment, separate and obtain your liquid and mine tailing.
As shown in Figure 5, the scene that accompanying drawing 5 is processed iron ore for the electromagnetic oscillation device, the electromagnetic oscillation device consists of the second electromagnetic oscillation body 5-4, the second terminal box 5-2, the second travelling belt 5-3, is scattered with the second pelletizing 5-1 on the second travelling belt 5-3; The second travelling belt 5-3 is between two parties through the second electromagnetic oscillation body 5-4, the second electromagnetic oscillation body 5-4 inside is wound with magnet coil, the housing of the second electromagnetic oscillation body 5-4 is welded on the U-steel frame of the second travelling belt 5-3 below, the 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 this device, iron ore 5-1 coarse crushing granularity is controlled at below 200mm, better effects if.Terminal box is external power supply device 5-2, and the second travelling belt 5-3 speed should not surpass 4.5m/s,
The electromagnetic oscillation device 1-1 equipment profile of processing the processing green pellets shown in iron ore electromagnetic oscillation device 5-4 and Fig. 1 shown in Fig. 5 is substantially similar, the electromagnetic oscillation equipment 5-4 that difference is to process iron ore is larger than the electromagnetic oscillation device 1-1 that processes green pellets, be wound around more insulated wire, can pass into larger electric current like this, obtain larger energy, the magnetic field that processing green pellets needs is (0.8-1) T, and the magnetic field of 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 needed so must be large.Owing to having wound the line, the housing area has also increased, and has also met high heat radiation requirement more simultaneously.
Iron ore is broken, the grinding process flow process for electromagnetic oscillation is processed for accompanying drawing 6.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 two sections of one section of ball milling and ball millings, enter ore dressing before granularity be generally 0.074-5mm;
Wherein, after two sections of in small, broken bits, one section of ball milling, ball millings, screening all is set; In addition, coarse crushing and in electromagnetic oscillation be set between broken process, and electromagnetic oscillation be set after screening in small, broken bits process, the electromagnetic oscillation processing is set with ining addition after the screening of one section of ball milling.
Because the granularity of iron ore is larger, the speed of conveying belt is also very fast, broken and grind on flow process and several electromagnetic oscillation devices will be set more just can obtain desirable crushing effect, the coarse crushing stage, general magnetic field was controlled at 2-2.3T, and the stage of grinding can be reduced 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 improve pelletizing ultimate compression strength, the efficiency that the leaching yield of gold in floatation process and iron ore be broken, grind.Theoretical basis is that w is proportional to f * B, and wherein w is energy of rupture, characterizes the energy size.F is the effect 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 is inner can produce defect (defect can be obviously mobile under high-temperature condition), and f * B product is large, and object produces slight crack, even broken.This paper paper is adjusted the size of B and f to being applied to the requirement of different field.Below will be set forth respectively for three aspects: application involved in the present invention.
1), aspect the processing green pellets, an electromagnetic oscillation device (as shown in Figure 1) generally is installed on the green-ball travelling belt.
The first, because the ultimate compression strength of green pellets is generally lower, should not adopt very high background magnetic field, by adjusting electric current, the background magnetic induction density of generally having an effect is (0.8-1) T.
The second, experimental results show that for iron ore pellets, the effect frequency is generally (500-800) Hz successful, should not continue to increase frequency, otherwise can make pelletizing occur breaking.
The 3rd, pelletizing is under rational (frequency, magnetic field) action of alternating magnetic field, subsurface defect (room) increases, from the solid state physics angle analysis, defect (room) can be subjected to displacement, along with the rising of temperature, Void diffusing is more obvious, this has promoted in the pellet sintering process greatly, the phase mutual diffusion between each component of pelletizing, and solid phase is fixed.Thereby improve pelletizing ultimate compression strength.
Experiment effect: first, in the constant situation of original technique, after adopting the electromagnetic oscillation technical finesse, the pelletizing mean compressive strength improves 20%-30%, as: for direct pelletizing average ultimate compression strength of throwing stove, be 2000N, after present technique is processed, mean compressive strength can reach (2400N-2600) N, and this has almost reached the pelletizing compressive strength standard 2500N that will be transported for long-distance.The second, can reduce the 3%-5% into the stove iron concentrate grade, the highest sintering temperature reduces (160-200) ℃, still can sintering goes out the pelletizing of same ultimate compression strength.
2), aspect the gold mine cyaniding leaching, on the 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 to improve the size of background magnetic induction density, simultaneously, also need increasing effect number of times.Common frequency setting (1000-1400) Hz, background magnetic induction density is (1-1.2) T.
The second, the high-frequency alternating magnetic field applied can make to produce gap between goldc grains and gangue, and goldc grains just can fully contact with NaCN solution like this, reaction more fully, and leaching yield is largely increased.After present technique is processed, the cyanide leaching of gold can improve 12%-23%.
3) aspect the fragmentation of magnetic ore deposit, grinding, an electromagnetic oscillation device (as shown in Figure 3) generally is installed on the Ore Transportation path.
First, because the individuality of iron ore is larger, obtain large energy of rupture w if want, effect frequency and background magnetic induction density parameter need increase greatly, the frequency of the alternating magnetic field that magnetic ore is applied is generally (1500-1800) HZ, and magnetic induction density reaches (2-2.3) T.
The second, powerful action of alternating magnetic field, on iron ore, can make iron ore integral body crack, if broken, grind operation and introduce present technique, can greatly improve the treatment capacity of crusher and ball mill.
Industrial applicibility: first, in the immovable situation of original technique, introduce present technique, 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, process for example the factory that selects of 2,000,000 tons of raw ores year with beginning, can reduce the power consumption of crusher 15%-20%, and can save 2 table grinders.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. an electromagnetic oscillation treatment unit, it consists of electromagnetic oscillation body (1-1), terminal box (1-3), travelling belt (1-4), is scattered with pelletizing (1-2) on travelling belt (1-4); 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, (housing of 1-1 is welded on the U-steel frame of travelling belt (1-4) below the electromagnetic oscillation body, terminal box (1-3) is welded in electromagnetic oscillation body (1-1) upper surface, and terminal box (1-3) is external power supply device.
2. according to electromagnetic oscillation treatment unit claimed in claim 1, wherein travelling belt (1-4) speed is generally 0.55m/s.
3. use the method as electromagnetic oscillation treatment unit as described in claim 1-2, its concrete steps are:
The first step: batching, iron ore pellets raw material generally comprise iron fine powder, additive, binding agent and form, need to get rid of the inner a certain amount of moisture of iron fine powder before batching, prevent the excessive pelletizing difficulty that causes of humidity, therefore utilize dry means to be removed moisture to the iron fine powder; Additive is mainly to prepare for desulfurization and dephosphorization, and binding agent mainly plays the effect of bonding, absorption.
Second step: mix, make again profit grind, generally by damp mill or high-pressure roller mill, repeatedly grind the iron ore pellets after batching.
The 3rd step: balling-up (pelletizing), generally by balling disc or drum pelletizer pelletizing.
The 4th step: screening, pelletizer green pellets granularity out differs, and the green-ball that is generally less than 6mm will return to and carry out the balling-up processing.
The 5th step: cloth, utilize the electromagnetic oscillation treatment unit to be delivered to shaft furnace to the green pellets sieved out by several roads and carry out roasting.
The 6th step: sintering (roasting), green pellets carries out sintering in shaft furnace, and the top temperature scope is generally 1250-1300 ℃.
The 7th step: the pelletizing after roasting is sieved, and diameter is more than or equal to the 5mm(millimeter) and the pelletizing that is less than 8mm (millimeter) be finished product;
The 8th step: diameter is less than to the 5mm(millimeter) after re-starting fine grinding, pelletizing prepared burden; Pelletizing to diameter between 8-15mm carries out cloth again.
4. an electromagnetic oscillation treatment unit, it is for golden Cyanide Leaching electromagnetic oscillation device, described electromagnetic oscillation treatment unit consists 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, in ore slurry pipeline inside, forming magnetic field; Magnet coil (3-1) will be processed through vacuum impregnation, between oil pipe (3-3) and fuel tank (3-2) and heat-removal system (3-5), is welding; Heat-removal system (3-5) is positioned at the bottom of this golden Cyanide Leaching electromagnetic oscillation device, in magnet coil (3-1), fuel tank (3-2), oil pipe (3-3), ore slurry pipeline (3-4) bottom; Ore slurry pipeline (3-4) level is 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) vertically is connected in heat-removal system (3-5) through the rectangular parallelepiped draw-in groove.Fuel tank (3-2) mainly plays the oil volume that is heated and increases, and for oil provides the effect of cushioning pocket, it is the circulation of participation oil not, and heat-removal system (3-5) inside is the alopecia areata heat-exchange system.
5. use the method for electromagnetic oscillation treatment unit as claimed in claim 4, its concrete steps are:
The first step: raw ore (gold mine) material is prepared, and general granularity is 30-50mm.
Second step: grind, after grinding, granularity requirements is less than or equal to 200 orders.
The 3rd step: size mixing, add CaO to size mixing, the value of 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.
The 4th step: process by electromagnetic oscillation, further ore particle is become to loose.Be beneficial between next step NaCN and Au and react more fully.
The 5th step: Cyanide Leaching, add NaCN, reaction equation is 2Au+NaCN+H2O2=2NaAu(CN)
2+ 2NaOH, separate displacement, after adding Zn, replaceablely goes out gold
The 6th step: filtration treatment, the slurries of the 5th processing are carried out to filtration treatment, separate and obtain your liquid and mine tailing.
6. an electromagnetic oscillation treatment unit, it consists of the second electromagnetic oscillation body (5-4), the second terminal box (5-2), the second travelling belt (5-3), is scattered with the second pelletizing (5-1) on the second travelling belt (5-3); The second travelling belt (5-3) is between two parties through the second electromagnetic oscillation body (5-4), the second electromagnetic oscillation body (5-4) inside is wound with magnet coil, the housing of the second electromagnetic oscillation body (5-4) is welded on the U-steel frame of the second travelling belt (5-3) below, the 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.
7. according to electromagnetic oscillation treatment unit claimed in claim 6, wherein the second travelling belt (5-3) speed is no more than 4.5m/s.
8. according to electromagnetic oscillation treatment unit claimed in claim 6, wherein iron ore (5-1) coarse crushing granularity is controlled at below 200mm.
9. use the method as electromagnetic oscillation treatment unit as described in claim 7-8, 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 two sections of one section of ball milling and ball millings, enter ore dressing before granularity be generally 0.074-5mm;
Wherein, after two sections of in small, broken bits, one section of ball milling, ball millings, screening all is set; In addition, coarse crushing and in electromagnetic oscillation be set between broken process, and electromagnetic oscillation be set after screening in small, broken bits process, the electromagnetic oscillation processing is set with ining addition after the screening of one section of ball milling.
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