阅读说明：本技术 一种无害化全资源镍粉渣处理工艺 (Harmless full-resource nickel powder slag treatment process ) 是由 俞向东 吴雪平 于 2021-06-28 设计创作，主要内容包括：本发明公开了一种无害化全资源镍粉渣处理工艺,包括以下步骤：矿石筛选、破碎除尘、磁化、电磁吸附除铁、筛分、融化、冷却分离和残渣处理等步骤,对破碎好的矿石颗粒进行磁化处理,送入磁化设备的内部,均速缓慢的通过磁化设备,使矿石颗粒中的带铁矿物获得磁性。该无害化全资源镍粉渣处理工艺,通过将破碎好的矿石颗粒防止在传送带上,送入磁化设备的内部,均速缓慢的通过磁化设备,使矿石颗粒中的带铁矿物获得磁性,然后通过除铁设备的内壁上设置的电磁铁运行,能够有效的将矿石颗粒中被磁化的带铁矿物吸附出来进行分离,能够有效的提高设备的除铁效率,用以保证在矿石初步处理前,将带铁的矿石进行分离。(The invention discloses a harmless full-resource nickel powder slag treatment process, which comprises the following steps: the method comprises the steps of ore screening, crushing and dedusting, magnetization, electromagnetic adsorption iron removal, screening, melting, cooling separation, residue treatment and the like, wherein the crushed ore particles are magnetized and sent into magnetizing equipment, and the iron-bearing minerals in the ore particles are magnetized by the magnetizing equipment at uniform speed. This innoxious full resource nickel powder sediment processing technology, prevent on the conveyer belt through the ore granule that will break, send into the inside of magnetic equipment, the slow magnetic equipment that passes through of uniform speed, the band iron mineral that makes in the ore granule obtains magnetism, then the electro-magnet operation that sets up on the inner wall through deironing equipment, can be effectual with in the ore granule by the magnetic band iron mineral adsorb out and separate, can effectual improve equipment's deironing efficiency, before guaranteeing the ore preliminary treatment, the ore with band iron separates.)

1. A harmless full-resource nickel powder slag treatment process is characterized by comprising the following steps:

1) screening ores, namely processing raw ores, selecting ores with the same size, crushing larger ores in advance to ensure the size of the ores so as to facilitate subsequent processing, washing all selected ores with clear water, drying the cleaned ores, filtering wastewater generated in the washing process, collecting residues falling during cleaning, and performing subsequent processing;

2) crushing and dedusting, namely putting the dried ore into a crusher, adding the fallen residues during cleaning, crushing the ore and the residues into particles with the same size, wherein the particle size of the particles is between 5 and 10mm, and simultaneously treating and discharging redundant generated dust in the crushing process;

3) magnetizing, namely magnetizing the crushed ore particles, preventing the crushed ore particles from being on a conveyor belt, conveying the crushed ore particles into magnetizing equipment, and enabling the crushed ore particles to pass through the magnetizing equipment at a uniform speed so as to enable iron-bearing minerals in the ore particles to obtain magnetism;

4) the magnetized ore particles are conveyed by a conveyor belt and enter into an iron removal device, when an electromagnet arranged on the inner wall of the iron removal device operates, magnetized iron-bearing minerals in the ore particles can be effectively adsorbed out for separation, and the residual mineral particles are subjected to subsequent treatment;

5) screening, namely screening the residual ore particles, putting the ore particles into a jig through a screening process, and discharging heavy metals and large particle substances from an outlet of the jig according to the gravity layering principle, wherein light and fine nickel powder residues are positioned on the upper layer of the jig, so that screening is finished for later use;

6) melting, namely putting heavy metal and fine nickel powder slag into heating equipment for heating treatment, wherein the heating equipment raises the internal temperature to 1600-1800 ℃, and adding a reducing agent in batches and stirring in the temperature rise process;

7) cooling and separating, namely naturally cooling the interior of the heating equipment to maintain the temperature at 1000-1200 ℃, then ventilating the interior of the equipment, carrying out weak oxidation treatment on the nickel slag, maintaining the temperature for half an hour, respectively discharging liquid and solid residues, and then naturally cooling;

8) and (4) treating the residue, namely putting the solid residue into the step 4) again, and performing the iron removal process again to further separate the residual iron residue.

2. The process of claim 1, wherein the crushed ore in step 1) has a particle size of 80-100mm, and the crushed ore is dedusted by dedusting equipment during crushing.

3. The process of claim 1, wherein in the step 2), excess dust and mud on the surface of the ore are washed and discharged by clean water during cleaning, and the residue after washing is retained.

4. The process of claim 1, wherein the magnetizing device in step 3) is a hollow drum with an electric coil inside, and can perform electric treatment on ore particles.

5. The harmless full resource nickel powder slag treatment process according to claim 1, wherein the magnetizing device is communicated with an iron removal device, and when the magnetizing device carries out electrification treatment on ore particles, electromagnet inside the iron removal device is operated to adsorb iron.

6. The process for treating harmless full resource nickel powder slag according to claim 1, wherein the conductivity of ore particles is improved by uniformly spraying water through a spraying device in the step 3) before feeding the ore particles into a magnetizing device.

7. The process of claim 1, wherein the residue obtained in the step 8) is crushed and then treated again in the step 4).

8. The process of claim 1, wherein the gas generated at high temperature in step 6) and step 7) is further treated by a waste gas treatment device.

Technical Field

The invention relates to the technical field of nickel powder slag treatment, in particular to a harmless full-resource nickel powder slag treatment process.

Background

Nickel, an approximately silvery white and hard ductile and ferromagnetic metallic element, which is highly abrasive and corrosion resistant, nickel being the iron-philic element, nickel being the highest among the earth nuclei, being a natural ferronickel alloy, ferrimagnesian rock containing more nickel than alumino-silicate rock, such as olivine containing 1000 times nickel as granite, pyroxene containing 80 times nickel as granite, merle containing iron and nickel, which were used earlier as superior iron because this metal does not rust, it was seen as silver by Peru's indigenous works, an alloy containing nickel-zinc was called cupronite, used in China 200 years ago in the city of the city, some even extended into Europe, AlexiKfrekdronstedt, working in Stockholm, Sweden, studied a new metal-arsenopyrite (NiAs) -a Los from Haichilan, Sweden, he contained copper, however, he extracted a new metal, he declared and named Nickel in 1754, which many chemists thought to be an alloy of cobalt, arsenic, iron and copper-these elements appear as trace contaminants-it was not confirmed that pure Nickel was produced by torbem bergman until 1775.

At present, the nickel slag treatment method mainly comprises a wet method and a fire method, the wet method process treatment cost is high, secondary pollution is possibly caused, and the method cannot be widely popularized so far; the pyrogenic process treatment of the nickel slag mainly takes carbonaceous materials such as coal and the like as a reducing agent and adds lime as a slagging material, and the iron resource in the nickel slag is recovered by reducing the nickel slag in a molten state; in the treatment method, along with the reduction reaction and the reduction of FeO content in slag, the melting temperature of the slag is increased, the viscosity is increased, the reduction kinetic condition is worsened, and therefore, a high reduction temperature is needed, otherwise, the reduction rate of iron in the slag is low, so that the treatment cost of the method is high, the actual popularization and application are difficult, and the slag cannot be further treated, and the harmless full-resource nickel powder slag treatment process is provided to solve the problems.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a harmless full-resource nickel powder slag treatment process, which has the advantages of high iron reduction degree, good environmental protection effect and the like, and solves the problems that the treatment cost is very high, the actual popularization and application are difficult, and the residue cannot be further treated.

(II) technical scheme

In order to achieve the purposes of high iron reduction degree and good environment-friendly effect, the invention provides the following technical scheme: a harmless full-resource nickel powder slag treatment process comprises the following steps:

1) screening ores, namely processing raw ores, selecting ores with the same size, crushing larger ores in advance to ensure the size of the ores so as to facilitate subsequent processing, washing all selected ores with clear water, drying the cleaned ores, filtering wastewater generated in the washing process, collecting residues falling during cleaning, and performing subsequent processing;

2) crushing and dedusting, namely putting the dried ore into a crusher, adding the fallen residues during cleaning, crushing the ore and the residues into particles with the same size, wherein the particle size of the particles is between 5 and 10mm, and simultaneously treating and discharging redundant generated dust in the crushing process;

3) magnetizing, namely magnetizing the crushed ore particles, preventing the crushed ore particles from being on a conveyor belt, conveying the crushed ore particles into magnetizing equipment, and enabling the crushed ore particles to pass through the magnetizing equipment at a uniform speed so as to enable iron-bearing minerals in the ore particles to obtain magnetism;

4) the magnetized ore particles are conveyed by a conveyor belt and enter into an iron removal device, when an electromagnet arranged on the inner wall of the iron removal device operates, magnetized iron-bearing minerals in the ore particles can be effectively adsorbed out for separation, and the residual mineral particles are subjected to subsequent treatment;

5) screening, namely screening the residual ore particles, putting the ore particles into a jig through a screening process, and discharging heavy metals and large particle substances from an outlet of the jig according to the gravity layering principle, wherein light and fine nickel powder residues are positioned on the upper layer of the jig, so that screening is finished for later use;

6) melting, namely putting heavy metal and fine nickel powder slag into heating equipment for heating treatment, wherein the heating equipment raises the internal temperature to 1600-1800 ℃, and adding a reducing agent in batches and stirring in the temperature rise process;

7) cooling and separating, namely naturally cooling the interior of the heating equipment to maintain the temperature at 1000-1200 ℃, then ventilating the interior of the equipment, carrying out weak oxidation treatment on the nickel slag, maintaining the temperature for half an hour, respectively discharging liquid and solid residues, and then naturally cooling;

8) and (4) treating the residue, namely putting the solid residue into the step 4) again, and performing the iron removal process again to further separate the residual iron residue.

Further, the particle size of the ore crushed in the step 1) is between 80 and 100mm, and dust is removed by a dust removing device in the crushing process.

Further, in the step 2), during cleaning, excess dust and mud on the surface of the ore are washed and discharged by clean water, and residues after washing are reserved.

Further, the magnetizing device in the step 3) is a hollow drum with an electric coil inside, and can perform power-on treatment on the ore particles.

Furthermore, the magnetizing equipment is communicated with the iron removal equipment, and when the magnetizing equipment carries out electrification treatment on ore particles, the electromagnet inside the iron removal equipment is operated to adsorb iron.

Further, before the ore particles are sent to the magnetizing device in the step 3), the spraying device is used for uniformly spraying water, so that the conductivity of the ore particles is improved.

Further, the residue in the step 8) is crushed and then subjected to the step 4) again for primary treatment.

Further, the gas generated at high temperature in the step 6) and the step 7) is further processed by a waste gas treatment device.

(III) advantageous effects

Compared with the prior art, the invention provides a harmless full resource nickel powder slag treatment process, which has the following beneficial effects:

the harmless full resource nickel powder slag treatment process comprises the steps of preventing crushed ore particles from being on a conveyor belt, feeding the crushed ore particles into a magnetizing device, enabling the crushed ore particles to pass through the magnetizing device at a uniform speed to enable iron-bearing minerals in the ore particles to obtain magnetism, then the electromagnet arranged on the inner wall of the iron removing equipment operates, so that the magnetized iron-bearing minerals in the ore particles can be effectively adsorbed and separated, the iron removing efficiency of the equipment can be effectively improved, used for ensuring that the ore with iron is separated before the primary treatment of the ore, saving the subsequent steps and simultaneously ensuring the purity of the nickel alloy prepared by the ore in the subsequent treatment, through having set up the collection residue, the residue that drops when adding the washing during breakage can effectually avoid the material to run off, and the polluted environment has solved that the treatment cost is also very high, is difficult to actual popularization and application, and can not carry out the problem of further processing to the residue.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A harmless full-resource nickel powder slag treatment process comprises the following steps:

1) screening ores, namely processing raw ores, selecting ores with the same size, crushing larger ores in advance to ensure the size of the ores so as to facilitate subsequent processing, washing all selected ores with clear water, drying the cleaned ores, filtering wastewater generated in the washing process, collecting residues falling during cleaning, and performing subsequent processing, wherein the particle size of the crushed ores is 80-100mm, and dust is removed by dust removal equipment in the crushing process so as to avoid pollution diffusion;

2) crushing and dedusting, namely putting the dried ore into a crusher, adding the fallen residues during cleaning, crushing the ore and the residues into particles with the same size, wherein the particle size of the particles is 5-10mm, treating and discharging redundant generated dust in the crushing process, flushing and discharging redundant dust and soil on the surface of the ore through clear water, and reserving the residues after flushing, so that the influence of other substances on subsequent processing can be effectively avoided;

3) magnetizing, namely magnetizing the crushed ore particles, preventing the crushed ore particles from being on a conveyor belt, sending the crushed ore particles into magnetizing equipment, enabling the iron-containing minerals in the ore particles to obtain magnetism through the magnetizing equipment at a uniform speed, enabling the magnetizing equipment to be a hollow drum with an electric coil inside, carrying out electrifying treatment on the ore particles, and simultaneously spraying water uniformly through a spraying device before sending the ore particles into the magnetizing equipment to improve the conductivity of the ore particles, wherein the magnetizing equipment is communicated with iron removal equipment;

it should be noted that, in order to uniformly and unidirectionally electrify the ore particles on the conveyor belt, after a period of time of circulation, the ore particles on the conveyor belt can be magnetized, especially the ore with high iron content, and the conveyor belt is an insulating conveyor belt.

4) The magnetized ore particles are conveyed by a conveyor belt and enter into an iron removal device, when an electromagnet arranged on the inner wall of the iron removal device operates, magnetized iron-bearing minerals in the ore particles can be effectively adsorbed out for separation, and the residual mineral particles are subjected to subsequent treatment;

the iron removing device can be an iron removing device in the prior art, and can also be replaced by a structure easily thought by a person skilled in the art, and it should be noted that the ore particles treated by the magnetizing device can directly fall into the iron removing device for treatment so as to avoid the phenomenon of electric leakage and electric conduction when in use.

5) Screening, namely screening the residual ore particles, putting the ore particles into a jig through a screening process, and discharging heavy metals and large particle substances from an outlet of the jig according to the gravity layering principle, wherein light and fine nickel powder residues are positioned on the upper layer of the jig, so that screening is finished for later use;

6) melting, namely putting heavy metal and fine nickel powder slag into heating equipment for heating treatment, wherein the heating equipment raises the internal temperature to 1600-1800 ℃, and adding a reducing agent in batches and stirring in the temperature rise process;

wherein the reducing agent is an alkaline leaching agent, and is one of MnO2, Co (OH)3, Ni (OH)3, Co2O3, Ni2S3 and the like, and the reducing agent is stirred.

7) Cooling and separating, namely naturally cooling the interior of the heating equipment to maintain the temperature at 1000-1200 ℃, then ventilating the interior of the equipment, carrying out weak oxidation treatment on the nickel slag, maintaining the temperature for half an hour, respectively discharging liquid and solid residues, and then naturally cooling;

wherein, the gas that the high temperature produced when adding man-hour carries out further processing through exhaust-gas treatment equipment, can effectually avoid the mineral to discharge the phenomenon of environmental pollution and potential danger when adding the poisonous gas who produces man-hour.

8) And (3) processing the residues, namely putting the solid residues into the step 4) again, performing the iron removal process again, further separating the residual iron residues, crushing the residues, and performing the step 4) again for primary processing, so that iron which is melted and condensed in the residues and is not removed can be screened again, and omission is avoided.

The invention has the beneficial effects that: the harmless full resource nickel powder slag treatment process comprises the steps of preventing crushed ore particles from being on a conveyor belt, feeding the crushed ore particles into a magnetizing device, enabling the crushed ore particles to pass through the magnetizing device at a uniform speed to enable iron-bearing minerals in the ore particles to obtain magnetism, then the electromagnet arranged on the inner wall of the iron removing equipment operates, so that the magnetized iron-bearing minerals in the ore particles can be effectively adsorbed and separated, the iron removing efficiency of the equipment can be effectively improved, used for ensuring that the ore with iron is separated before the primary treatment of the ore, saving the subsequent steps and simultaneously ensuring the purity of the nickel alloy prepared by the ore in the subsequent treatment, through having set up the collection residue, the residue that drops when adding the washing during breakage can effectually avoid the material to run off, and the polluted environment has solved that the treatment cost is also very high, is difficult to actual popularization and application, and can not carry out the problem of further processing to the residue.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.