CN103397126B - A kind of ferrophosphorus and preparation method thereof - Google Patents
A kind of ferrophosphorus and preparation method thereof Download PDFInfo
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- CN103397126B CN103397126B CN201310332335.9A CN201310332335A CN103397126B CN 103397126 B CN103397126 B CN 103397126B CN 201310332335 A CN201310332335 A CN 201310332335A CN 103397126 B CN103397126 B CN 103397126B
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Abstract
The invention discloses a kind of preparation method of ferrophosphorus, wherein, be that the ferrophosphorus slag of 70-85%:10-25%:5-20%, high-phosphorus iron ore and rhombspar are placed in smelting furnace and smelt by weight proportion, obtain ferrophosphorus.Ferrophosphorus preparation method technique of the present invention is simple, and ferrophosphorus slag utilization ratio, up to more than 98%, makes using waste phosphorus scum realize recycling, reduces its pollution on the environment, improve the grade of ferrophosphorus.The invention also discloses a kind of ferrophosphorus obtained by above-mentioned preparation method.
Description
Technical field
The present invention relates to alloy material manufacture field, particularly relate to a kind of ferrophosphorus and preparation method thereof.
Background technology
Traditional ferrophosphorus production method adopts iron or iron ore and Rock Phosphate (72Min BPL) melting and the ferrophosphorus that obtains in circuit or blast furnace.This kind of technological difficulty is large, and production cost is high.Ferrophosphorus slag is one of three wastes discharged in electricity distillation phosphorus production process processed, and the ferrophosphorus slag discharged is except part is used to production fused(calcium magnesium)phosphate, calcium silicate fertilizer, tertiary sodium phosphate, and major part utilizes not yet well, serious environment pollution, harm agriculture production.And the ferrophosphorus grade of producing now only has P16, P18, P21, P24 tetra-kinds, and the chemical composition of these four kinds of products is as shown in table 1 below:
Table 1
Therefore, desirable to provide a kind of ferrophosphorus slag that can utilize to prepare the method for ferrophosphorus, thus improve the utilization ratio of ferrophosphorus slag, and ferrophosphorus product grade can be improved.
Summary of the invention
For this reason, the invention provides a kind of new ferrophosphorus preparation method at least partially that at least can solve the problem and the ferrophosphorus prepared by the method.
According to an aspect of the present invention, provide a kind of preparation method of ferrophosphorus, wherein, be that the ferrophosphorus slag of 70-85%:10-25%:5-20%, high-phosphorus iron ore and rhombspar are placed in smelting furnace and smelt by weight proportion, obtain ferrophosphorus.
Alternatively, according to ferrophosphorus preparation method of the present invention, described smelting temperature is 1250 DEG C-1450 DEG C, and tap to tap time is 20-40 minute.
Alternatively, according to ferrophosphorus preparation method of the present invention, described preparation method comprises the operation described ferrophosphorus obtained being carried out fragmentation further.
Alternatively, according to ferrophosphorus preparation method of the present invention, described ferrophosphorus is crushed to granularity and is less than 60mm.
Alternatively, according to ferrophosphorus preparation method of the present invention, described preparation method comprises the operation that the ferrophosphorus after by described fragmentation carries out classification further.
Alternatively, according to ferrophosphorus preparation method of the present invention, the ferrophosphorus after described fragmentation is divided into following three grades: granularity is 5-60mm, and granularity is 1-5mm, and granularity is less than 1mm.
Alternatively, according to ferrophosphorus preparation method of the present invention, it is that the ferrophosphorus of 1-5mm carries out magnetic separation that described preparation method comprises further by described granularity, is then pressed into oblate spherical or block operation.
Alternatively, according to ferrophosphorus preparation method of the present invention, described preparation method comprises the ferrophosphorus described granularity being less than 1mm further and carries out magnetic separation, is then ground into the operation of varigrained ferrophosphorus powder.
Alternatively, according to ferrophosphorus preparation method of the present invention, the granularity of described ferrophosphorus powder is respectively 500 orders, 800 orders, 1200 orders or 1500 orders.
According to another aspect of the present invention, present invention also offers a kind of ferrophosphorus obtained according to above-mentioned preparation method.
Ferrophosphorus preparation method technique of the present invention is simple, ferrophosphorus slag utilization ratio is up to more than 98%, using waste phosphorus scum is made to realize recycling, reduce its pollution on the environment, and make ferrophosphorus grade by P16, P18, P21, P24 tetra-kinds of products bring up to P16, P18, P21, P24, P27, P29 six kinds of products.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.In the accompanying drawings:
Fig. 1 is the preparation flow figure of ferrophosphorus of the present invention.
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment, the invention will be further described.
The invention provides a kind of ferrophosphorus preparation method, wherein, be that the ferrophosphorus slag of 70-85%:10-25%:5-20%, high-phosphorus iron ore and rhombspar are placed in smelting furnace and smelt by weight proportion, obtain ferrophosphorus.
Fig. 1 shows the preparation flow figure of ferrophosphorus of the present invention.As shown in Figure 1, in order to prepare ferrophosphorus, first ferrophosphorus slag being carried out assay, according to analytical results, ferrophosphorus slag being divided into different grades, the ferrophosphorus slag of different grades is prepared the ferrophosphorus of different model as raw material.
Ferrophosphorus slag, high-phosphorus iron ore and rhombspar after classification is added in smelting furnace and smelts, after having smelted, obtain ferrophosphorus.Wherein, the weight proportion of described ferrophosphorus slag, high-phosphorus iron ore and rhombspar is 70-85%:10-25%:5-20%, is preferably 85:10:5.Described smelting technology can adopt conventional smelting technology, and wherein smelting temperature is: 1250 DEG C-1450 DEG C, and tap to tap time is 20-40 minute.Preferably, described smelting temperature is
1300 DEG C, tap to tap time is 30 minutes.After this smelting technology, prepare four kinds of ferrophosphorus products that grade is respectively P21, P24, P27, P29, increased the high-grade ferrophosphorus product of P27, P29 two kinds newly, made ferrophosphorus expand as six kinds of grades by four kinds of grades.The chemical composition of the ferrophosphorus product of described six kinds of grades is as shown in table 2 below.
Table 2
The ferrophosphorus obtained after smelting is generally large bulk, for the ease of packaging and transport, also needs to carry out break process to the ferrophosphorus obtained, is crushed to the granularity of next step job requirements.In one embodiment of the present of invention, described ferrophosphorus 250 X 400 crusher in crushing are less than 60mm to granularity.Be understandable that, the degree of crushing of ferrophosphorus can adjust according to the needs of actual production.
Ferrophosphorus is additive main in Iron and Steel Production, all has been widely used in the industry such as building, metallurgy, auto parts machinery, sanitary apparatus, protective system simultaneously, and its purposes is different, also different to the granularity requirements of ferrophosphorus.In order to meet the purposes of different industries, ferrophosphorus preparation method of the present invention comprises the ferrophosphorus after by described fragmentation carries out classification operation according to globule size further.In one embodiment of the present of invention, be crushed to the ferrophosphorus that granularity is less than 60mm and carry out classification by above-mentioned by the three-deck vibrating screen that size of mesh is different.The size of mesh of described three vibratory screening apparatuss is respectively 60mm, 5mm and 1mm, and therefore, it is 5-60mm that described ferrophosphorus is divided into granularity, and granularity is 1-5mm, and granularity is less than 1mm tri-ranks.
Carrying out in the process of classification to the ferrophosphorus after fragmentation, because the granularity of ferrophosphorus is less, part ferrophosphorus can enter air, becomes dust.In order to purify air, preventing pollution, simultaneously also in order to reclaim ferrophosphorus, needs to carry out dust removal process.In the present invention, employ dust-precipitator and carry out dust removal process.Dust-precipitator is a kind of Application comparison dust removal installation widely, generally has bag filter, air box impulse bag-type dust-precipitator, dust precipitator etc.Be employed herein air box impulse bag-type dust-precipitator.The advantage of all class dust-precipitators such as air box impulse bag-type dust-precipitator collection chamber-dividing counter-blowing and pulse jet, kinetic energy insufficient strength when overcoming chamber-dividing counter-blowing, filter the shortcoming of simultaneously carrying out with deashing, thus make bag filter add using adaptability, improve dust-collecting efficiency.The gas of phosphorous iron powder enters the ash bucket of dust-precipitator through inlet mouth, the ferrophosphorus powder of part larger particles is here because the reason such as inertial impaction, gravity settling directly falls into ash bucket, other gases containing small grain size ferrophosphorus powder rise with air-flow and enter a bag room, after sock filtration, ferrophosphorus pruinescence is trapped in filter bag outside surface, and gas then enters air by induced draft fan after purification.The ferrophosphorus powder of the ferrophosphorus powder in ash bucket and filter bag outside surface is collected, i.e. recyclable ferrophosphorus powder.Air box impulse bag-type dust-precipitator dust-collecting efficiency is high, can reach more than 99.9, adopts this kind of dust-precipitator, can fully reclaim ferrophosphorus powder, improves resource utilization.
According to practical use needs, can be for further processing or directly pack to the ferrophosphorus after described classification.
In the present invention, the ferrophosphorus using granularity being 5-60mm, directly as finished product ferrophosphorus, is directly packed after it being measured according to Different Package specification.
In the present invention, the ferrophosphorus being 1-5mm for granularity has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.The principle of work of magnetic separation is after other material to be selected feeds the sorting space of magnetic separator, is subject to the acting in conjunction of magnetic force and other mechanical forces (as gravity, centrifugal force, frictional force, resistance of medium etc.).The size of magnetic force suffered by magnetic-particle is relevant with the magnetic of material own; Non-magnetic particle is mainly by the effect of mechanical force.Therefore, respectively move along different path, obtain sorting.Through magnetic separation, the such as white residue in ferrophosphorus and other unwanted impurity are removed, and ferrophosphorus purity is further enhanced.After magnetic separation, described ferrophosphorus is delivered in powerful ball press, be pressed into the oblate sphere of different diameter.In one embodiment of the present of invention, the diameter of described oblate sphere is respectively 20mm, 40mm or 60mm.As selection, the ferrophosphorus after magnetic separation can also be delivered in powerful briquetting press, be pressed into the bulk of different size.In one embodiment of the present of invention, described ferrophosphorus is pressed into cake block, and the diameter of described cake block is respectively 20mm, 40mm or 60mm.When carrying out briquetting to ferrophosphorus, because the granularity of ferrophosphorus is less, part ferrophosphorus can enter air becomes dust, therefore needs to recycle it.Also use air box impulse bag-type dust-precipitator herein and carry out process of gathering dust.After having suppressed, described oblate sphere or cake block are carried out drying and processing, can pack after oven dry, become finished product ferrophosphorus.Through ball press or briquetting press make shaping after material, energy-conserving and environment-protective, are convenient to transport.
In the present invention, ferrophosphorus granularity being less than to 1mm has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.Through magnetic separation, the impurity in ferrophosphorus is removed, and ferrophosphorus purity is further enhanced.After magnetic separation, described ferrophosphorus is delivered in airflow milling powder system and further pulverizes, be processed into less granularity, reach the demanding criteria of industry.
Airflow milling is that pressurized air sprays through nozzle at high speeds, and high-speed jet drives material to make high-speed motion, and material is collided, and rubs and pulverizes.Pulverized material is delivered to graded region by upstream, is filtered out the fine powder reaching granularity requirements by horizontally disposed grading wheel, and the meal not reaching granularity requirements returns to disintegrating area to be continued to pulverize.Qualified fine powder enters efficient cyclone separator with air-flow and is collected, and dusty gas enters air after dust-precipitator filtration, purification.Also use air box impulse bag-type dust-precipitator herein and carry out process of gathering dust.Airflow milling, as a kind of visual plant of superfine grinding, is widely used in the superfine grinding of scrap metal mineral and industrial chemicals.Airflow milling milling product, except fine size, also has narrow particle size distribution, particle surface is smooth, particle shape is regular, the features such as purity is high, good dispersity.In the present invention, the ferrophosphorus utilizing airflow milling system granularity to be less than 1mm is ground into granularity further and is respectively 500 orders, 800 orders, 1200 orders or 1500 object ultrafine powder.After pulverizing completes, pack, obtain the finished product ferrophosphorus of different grain size specification.
Ferrophosphorus preparation method technique of the present invention is simple, and ferrophosphorus slag utilization ratio, up to more than 98%, achieves the recycling of ferrophosphorus slag.By carrying out classification processing to the ferrophosphorus obtained, the ferrophosphorus of different grain size scope can be prepared, thus meet the different requirements of different industries to ferrophosphorus granularity.
More according to the ferrophosphorus preparation method optional element that the present invention proposes, can design various embodiments, therefore specific embodiment is only as the exemplary illustration of specific implementation of the present invention,
And do not form limitation of the scope of the invention.In order to concrete description the present invention, following examples are selected to carry out exemplary illustration.
Embodiment 1
In order to prepare ferrophosphorus, first ferrophosphorus slag being carried out assay, according to analytical results, ferrophosphorus slag being divided into different grades, the ferrophosphorus slag of different grades is prepared the ferrophosphorus of different model as raw material.Ferrophosphorus slag, high-phosphorus iron ore and rhombspar after classification is added in smelting furnace and smelts, after having smelted, obtain ferrophosphorus.Wherein, the weight proportion of described ferrophosphorus slag, high-phosphorus iron ore and rhombspar is 80:10:10.Described smelting technology adopts conventional smelting technology, and wherein smelting temperature is 1350 DEG C, and tap to tap time is 35 minutes.
The ferrophosphorus obtained after described smelting 250 X 400 crusher in crushing are less than 60mm to granularity.Then, the ferrophosphorus after above-mentioned fragmentation is carried out classification by the three-deck vibrating screen that size of mesh is different.The size of mesh of described three vibratory screening apparatuss is respectively 60mm, 5mm and 1mm, and therefore, it is 5-60mm that described ferrophosphorus is divided into granularity, and granularity is 1-5mm, and granularity is less than 1mm tri-ranks.
Respectively different process is carried out to the ferrophosphorus after classification.Be the ferrophosphorus of 5-60mm for granularity, using it directly as finished product ferrophosphorus, carry out after metering directly packaging according to Different Package specification.The ferrophosphorus being 1-5mm for granularity has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.Through magnetic separation, the impurity in ferrophosphorus is removed, and ferrophosphorus purity is further enhanced.After magnetic separation, described ferrophosphorus is delivered in powerful ball press, be pressed into the oblate sphere that diameter is 20mm.After having suppressed, described oblate sphere is carried out drying and processing, can pack after oven dry, become finished product ferrophosphorus.Ferrophosphorus granularity being less than to 1mm has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.After magnetic separation, described ferrophosphorus is delivered in airflow milling powder system, it is ground into further granularity and is respectively 500 object fine powders.After pulverizing completes, measure, packaging, obtains finished product ferrophosphorus.
In preparation method of the present invention, in vibratory screening apparatus classification process, pressing process and airflow milling crushing process, air box impulse bag-type dust-precipitator is all adopted to reclaim the ferrophosphorus powder entering air.
Embodiment 2
In order to prepare ferrophosphorus, first ferrophosphorus slag being carried out assay, according to analytical results, ferrophosphorus slag being divided into different grades, the ferrophosphorus slag of different grades is prepared the ferrophosphorus of different model as raw material.Ferrophosphorus slag, high-phosphorus iron ore and rhombspar after classification is added in smelting furnace and smelts, after having smelted, obtain ferrophosphorus.Wherein, the weight proportion of described ferrophosphorus slag, high-phosphorus iron ore and rhombspar is 75:20:5.Described smelting technology adopts conventional smelting technology, and wherein smelting temperature is 1400 DEG C, and tap to tap time is 20 minutes.
The ferrophosphorus obtained after described smelting 250 X 400 crusher in crushing are less than 60mm to granularity.Then, the ferrophosphorus after above-mentioned fragmentation is carried out classification by the three-deck vibrating screen that size of mesh is different.The size of mesh of described three vibratory screening apparatuss is respectively 60mm, 5mm and 1mm, and therefore, it is 5-60mm that described ferrophosphorus is divided into granularity, and granularity is 1-5mm, and granularity is less than 1mm tri-ranks.
Respectively different process is carried out to the ferrophosphorus after classification.Be the ferrophosphorus of 5-60mm for granularity, using it directly as finished product ferrophosphorus, carry out after metering directly packaging according to Different Package specification.The ferrophosphorus being 1-5mm for granularity has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.Through magnetic separation, the impurity in ferrophosphorus is removed, and ferrophosphorus purity is further enhanced.After magnetic separation, described ferrophosphorus is delivered in powerful ball press, be pressed into the oblate sphere that diameter is 40mm.After having suppressed, described oblate sphere is carried out drying and processing, can pack after oven dry, become finished product ferrophosphorus.Ferrophosphorus granularity being less than to 1mm has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.After magnetic separation, described ferrophosphorus is delivered in airflow milling powder system, it is ground into further granularity and is respectively 800 object fine powders.After pulverizing completes, measure, packaging, obtains finished product ferrophosphorus.
In preparation method of the present invention, in vibratory screening apparatus classification process, pressing process and airflow milling crushing process, air box impulse bag-type dust-precipitator is all adopted to reclaim the ferrophosphorus powder entering air.
Embodiment 3
In order to prepare ferrophosphorus, first ferrophosphorus slag being carried out assay, according to analytical results, ferrophosphorus slag being divided into different grades, the ferrophosphorus slag of different grades is prepared the ferrophosphorus of different model as raw material.Ferrophosphorus slag, high-phosphorus iron ore and rhombspar after classification is added in smelting furnace and smelts, after having smelted, obtain ferrophosphorus.Wherein, the weight proportion of described ferrophosphorus slag, high-phosphorus iron ore and rhombspar is 70:15:15.Described smelting technology adopts conventional smelting technology, and wherein smelting temperature is 1250 DEG C, and tap to tap time is 40 minutes.
The ferrophosphorus obtained after described smelting 250 X 400 crusher in crushing are less than 60mm to granularity.Then, the ferrophosphorus after above-mentioned fragmentation is carried out classification by the three-deck vibrating screen that size of mesh is different.The size of mesh of described three vibratory screening apparatuss is respectively 60mm, 5mm and 1mm, and therefore, it is 5-60mm that described ferrophosphorus is divided into granularity, and granularity is 1-5mm, and granularity is less than 1mm tri-ranks.
Respectively different process is carried out to the ferrophosphorus after classification.Be the ferrophosphorus of 5-60mm for granularity, using it directly as finished product ferrophosphorus, carry out after metering directly packaging according to Different Package specification.The ferrophosphorus being 1-5mm for granularity has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.Through magnetic separation, the impurity in ferrophosphorus is removed, and ferrophosphorus purity is further enhanced.After magnetic separation, described ferrophosphorus is delivered in powerful ball press, be pressed into the oblate sphere that diameter is 60mm.After having suppressed, described oblate sphere is carried out drying and processing, can pack after oven dry, become finished product ferrophosphorus.Ferrophosphorus granularity being less than to 1mm has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.After magnetic separation, described ferrophosphorus is delivered in airflow milling powder system, it is ground into further granularity and is respectively 1200 object fine powders.After pulverizing completes, measure, packaging, obtains finished product ferrophosphorus.
In preparation method of the present invention, in vibratory screening apparatus classification process, pressing process and airflow milling crushing process, air box impulse bag-type dust-precipitator is all adopted to reclaim the ferrophosphorus powder entering air.
Embodiment 4
In order to prepare ferrophosphorus, first ferrophosphorus slag being carried out assay, according to analytical results, ferrophosphorus slag being divided into different grades, the ferrophosphorus slag of different grades is prepared the ferrophosphorus of different model as raw material.Ferrophosphorus slag, high-phosphorus iron ore and rhombspar after classification is added in smelting furnace and smelts, after having smelted, obtain ferrophosphorus.Wherein, the weight proportion of described ferrophosphorus slag, high-phosphorus iron ore and rhombspar is 85:10:5.Described smelting technology adopts conventional smelting technology, and wherein smelting temperature is 1300 DEG C, and tap to tap time is 30 minutes.
The ferrophosphorus obtained after described smelting 250 X 400 crusher in crushing are less than 60mm to granularity.Then, the ferrophosphorus after above-mentioned fragmentation is carried out classification by the three-deck vibrating screen that size of mesh is different.The size of mesh of described three vibratory screening apparatuss is respectively 60mm, 5mm and 1mm, and therefore, it is 5-60mm that described ferrophosphorus is divided into granularity, and granularity is 1-5mm, and granularity is less than 1mm tri-ranks.
Respectively different process is carried out to the ferrophosphorus after classification.Be the ferrophosphorus of 5-60mm for granularity, using it directly as finished product ferrophosphorus, carry out after metering directly packaging according to Different Package specification.The ferrophosphorus being 1-5mm for granularity has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.Through magnetic separation, the impurity in ferrophosphorus is removed, and ferrophosphorus purity is further enhanced.After magnetic separation, described ferrophosphorus is delivered in powerful ball press, be pressed into the cake block that diameter is 20mm.After having suppressed, described cake block is carried out drying and processing, can pack after oven dry, become finished product ferrophosphorus.Ferrophosphorus granularity being less than to 1mm has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.After magnetic separation, described ferrophosphorus is delivered in airflow milling powder system, it is ground into further granularity and is respectively 1500 object fine powders.After pulverizing completes, measure, packaging, obtains finished product ferrophosphorus.
In preparation method of the present invention, in vibratory screening apparatus classification process, pressing process and airflow milling crushing process, air box impulse bag-type dust-precipitator is all adopted to reclaim the ferrophosphorus powder entering air.
Embodiment 5
In order to prepare ferrophosphorus, first ferrophosphorus slag being carried out assay, according to analytical results, ferrophosphorus slag being divided into different grades, the ferrophosphorus slag of different grades is prepared the ferrophosphorus of different model as raw material.Ferrophosphorus slag, high-phosphorus iron ore and rhombspar after classification is added in smelting furnace and smelts, after having smelted, obtain ferrophosphorus.Wherein, the weight proportion of described ferrophosphorus slag, high-phosphorus iron ore and rhombspar is 70:10:20.Described smelting technology adopts conventional smelting technology, and wherein smelting temperature is 1450 DEG C, and tap to tap time is 20
minute.The ferrophosphorus obtained after described smelting 250 X 400 crusher in crushing are less than 60mm to granularity.Then, the ferrophosphorus after above-mentioned fragmentation is carried out classification by the three-deck vibrating screen that size of mesh is different.The size of mesh of described three vibratory screening apparatuss is respectively 60mm, 5mm and 1mm, and therefore, it is 5-60mm that described ferrophosphorus is divided into granularity, and granularity is 1-5mm, and granularity is less than 1mm tri-ranks.
Respectively different process is carried out to the ferrophosphorus after classification.Be the ferrophosphorus of 5-60mm for granularity, using it directly as finished product ferrophosphorus, carry out after metering directly packaging according to Different Package specification.The ferrophosphorus being 1-5mm for granularity has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.Through magnetic separation, the impurity in ferrophosphorus is removed, and ferrophosphorus purity is further enhanced.After magnetic separation, described ferrophosphorus is delivered in powerful ball press, be pressed into the cake block that diameter is 40mm.After having suppressed, described cake block is carried out drying and processing, can pack after oven dry, become finished product ferrophosphorus.Ferrophosphorus granularity being less than to 1mm has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.After magnetic separation, described ferrophosphorus is delivered in airflow milling powder system, it is ground into further granularity and is respectively 1200 object fine powders.After pulverizing completes, measure, packaging, obtains finished product ferrophosphorus.
In preparation method of the present invention, in vibratory screening apparatus classification process, pressing process and airflow milling crushing process, air box impulse bag-type dust-precipitator is all adopted to reclaim the ferrophosphorus powder entering air.
Embodiment 6
In order to prepare ferrophosphorus, first ferrophosphorus slag being carried out assay, according to analytical results, ferrophosphorus slag being divided into different grades, the ferrophosphorus slag of different grades is prepared the ferrophosphorus of different model as raw material.Ferrophosphorus slag, high-phosphorus iron ore and rhombspar after classification is added in smelting furnace and smelts, after having smelted, obtain ferrophosphorus.Wherein, the weight proportion of described ferrophosphorus slag, high-phosphorus iron ore and rhombspar is 70:25:5.Described smelting technology adopts conventional smelting technology, and wherein smelting temperature is 1400 DEG C, and tap to tap time is 25 minutes.The ferrophosphorus obtained after described smelting 250 X 400 crusher in crushing are less than 60mm to granularity.Then, the ferrophosphorus after above-mentioned fragmentation is carried out classification by the three-deck vibrating screen that size of mesh is different.The size of mesh of described three vibratory screening apparatuss is respectively 60mm, 5mm and 1mm, and therefore, it is 5-60mm that described ferrophosphorus is divided into granularity, and granularity is 1-5mm, and granularity is less than 1mm tri-ranks.
Respectively different process is carried out to the ferrophosphorus after classification.Be the ferrophosphorus of 5-60mm for granularity, using it directly as finished product ferrophosphorus, carry out after metering directly packaging according to Different Package specification.The ferrophosphorus being 1-5mm for granularity has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.Through magnetic separation, the impurity in ferrophosphorus is removed, and ferrophosphorus purity is further enhanced.After magnetic separation, described ferrophosphorus is delivered in powerful ball press, be pressed into the cake block that diameter is 60mm.After having suppressed, described cake block is carried out drying and processing, can pack after oven dry, become finished product ferrophosphorus.Ferrophosphorus granularity being less than to 1mm has also carried out further processing.First, sent in magnetic separator and carried out magnetic separation.After magnetic separation, described ferrophosphorus is delivered in airflow milling powder system, it is ground into further granularity and is respectively 500 object fine powders.After pulverizing completes, measure, packaging, obtains finished product ferrophosphorus.
In preparation method of the present invention, in vibratory screening apparatus classification process, pressing process and airflow milling crushing process, air box impulse bag-type dust-precipitator is all adopted to reclaim the ferrophosphorus powder entering air.
It should be noted, the present invention will be described instead of limit the invention for above-described embodiment, and those skilled in the art can design alternative embodiment when not departing from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and does not arrange element in the claims or operation.
Claims (8)
1. a ferrophosphorus preparation method, wherein, is that the ferrophosphorus slag of 70-85%:10-25%:5-20%, high-phosphorus iron ore and rhombspar are placed in smelting furnace and smelt by weight proportion, obtains ferrophosphorus; Wherein, described smelting temperature is 1250 DEG C-1450 DEG C, and tap to tap time is 20-40 minute.
2. ferrophosphorus preparation method according to claim 1, wherein, described preparation method comprises the operation described ferrophosphorus obtained being carried out fragmentation further.
3. preparation method according to claim 2, wherein, described ferrophosphorus is crushed to granularity and is less than 60mm.
4. ferrophosphorus preparation method according to claim 3, wherein, described preparation method comprises the operation that the ferrophosphorus after by described fragmentation carries out classification further.
5. ferrophosphorus preparation method according to claim 4, wherein, the ferrophosphorus after described fragmentation is divided into following three grades: granularity is 5-60mm, and granularity is 1-5mm, and granularity is less than 1mm.
6. ferrophosphorus preparation method according to claim 5, wherein, it is that the ferrophosphorus of 1-5mm carries out magnetic separation that described preparation method comprises further by described granularity, is then pressed into oblate spherical or block operation.
7. ferrophosphorus preparation method according to claim 5, wherein, described preparation method comprises the ferrophosphorus described granularity being less than 1mm further and carries out magnetic separation, is then ground into the operation of different grain size ferrophosphorus powder.
8. ferrophosphorus preparation method according to claim 7, wherein, the granularity of described ferrophosphorus powder is respectively 500 orders, 800 orders, 1200 orders or 1500 orders.
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| CN110117745B (en) * | 2019-05-30 | 2020-12-22 | 贵州大学 | Method for preparing ferrophosphorus alloy by adopting middle-low grade phosphorite and copper slag |
| CN111792632A (en) * | 2020-06-18 | 2020-10-20 | 昆明理工大学 | Method for reducing ferro-phosphorus in slag produced by electric furnace method yellow phosphorus production |
| CN114032360B (en) * | 2021-11-05 | 2022-09-06 | 河南豫中新材料有限公司 | Method for refining ferrophosphorus based on waste slag recycling |
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