CN103433141B - Steel mill's desulfurization slag sorting process method - Google Patents
Steel mill's desulfurization slag sorting process method Download PDFInfo
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- CN103433141B CN103433141B CN201310318039.3A CN201310318039A CN103433141B CN 103433141 B CN103433141 B CN 103433141B CN 201310318039 A CN201310318039 A CN 201310318039A CN 103433141 B CN103433141 B CN 103433141B
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Abstract
A kind of steel mill desulfurization slag sorting process method, the steps include: the 10-16 object composition obtained by screening mode to be that the desulfurization slag intermediate of carbon and collecting agent and foaming agent are mixed to form the slurries that concentration is 22-27%, making slurries form diameter by the mode of flotation is the bubble of 8-10mm, collecting diameter is obtain desulfurization slag separator after the bubble of 8-10mm, improve the separating grade to graphitic carbon in desulfurization slag, improve the comprehensive utilization of desulfurization slag.
Description
One, technical field
The present invention relates to a kind of method for separating and device, especially a kind of steel mill desulfurization slag sorting process method.
Two, background technology
In iron and steel is produced, can produce a large amount of desulfurization slag and slag, and the byproduct of desulfurization slag effect iron and steel is not also utilized, the desulfurization slag of accumulation can produce pollution to environment, and therefore steel mill's desulfurization slag sorting process method is an important link of metallurgical industry; Now right utilization mainly contains three kinds of modes, wherein first kind of way adopts furnace cupola secondary smelting to be separated, first its shortcoming is that steel (iron) chemical composition separated is unstable, impurity is many, and sulfur content severe overweight, can not be used for steel-making and produce label foundry goods, in this processing mode production process, contaminated environment is serious; Second method adopts broken the combination with magnetic separation of multistage blade of a sword formula to be separated, and the method production process produces a large amount of dust, and be separated unclean, sulfur impurity compound is once many, can not be used for steel-making and produce foundry goods; The third rinses with water after adopting the dry grinding of ball mill principle to be separated, one side is that the iron tramp sulfide content after being separated is high, wear and tear in machines is large, a large amount of dust is produced on the other hand in mechanical milling process, contain the materials such as a large amount of sulfide in waste water after washing, severe contamination is caused to air, water source environment etc.These three kinds of methods can produce pollution to environment in a word, desulfurization slag can not be carried out classification careful, and the various compositions contained of desulfurization slag are separated recycling.
Three, summary of the invention
In order to overcome above-mentioned technical disadvantages, the object of this invention is to provide a kind of steel mill desulfurization slag sorting process method, therefore improve the separating grade to graphitic carbon in desulfurization slag, improve the comprehensive utilization of desulfurization slag.
For achieving the above object, the technical scheme that the present invention takes is: a kind of for the method for separating to desulfurization slag, the desulfurization slag intermediate of the 10-16 object composition carbon elements obtained by screening mode and collecting agent and foaming agent is the steps include: to be mixed to form the slurries that concentration is 22-27%, making slurries form diameter by the mode of flotation is the bubble of 8-10mm, and collecting diameter is obtain desulfurization slag separator after the bubble of 8-10mm.
Owing to devising slurries and bubble, the phosphorus content making the desulfurization slag separator obtained is 90-95%, and desulfurization slag is progressively sub-elected different material, therefore improves the separating grade to graphitic carbon in desulfurization slag, improves the comprehensive utilization of desulfurization slag.
The present invention devises, and the steps include:
A, primary election: desulfurization slag is carried out physics primary election, steel grit block in desulfurization slag is used as steelmaking feed, and remaining grain dust is set to desulfurization slag intermediate I;
B, screening: be that 10-16 object screen cloth is separated and obtains composition containing the desulfurization slag intermediate II of ferro element and the desulfurization slag intermediate III of composition carbon elements by diameter desulfurization slag intermediate I, separating plate falls, makes the free vertical drop of desulfurization slag intermediate III along being 15-20 ° with vertical direction to make desulfurization slag intermediate II, is 10-20m at air quantity
3under/h effect, remove the dust be attached on desulfurization slag intermediate II and desulfurization slag intermediate III, the dust collected is as building materials raw material;
C, flotation: be set to include and roughly select with selected,
Roughly select: according to desulfurization slag intermediate III: collecting agent: the ratio 1T:4.9-5.4 kg:3.9-5.4 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 22-27%, make slurries at inflation 85-95m per hour
3air floatation cell in be the stirring action of 900-1000 rev/min by rotating speed, forming diameter is the bubble of 8-10mm, collects the bubble risen along with floating agent and obtains desulfurization slag intermediate IV;
Selected: according to desulfurization slag intermediate IV: collecting agent: the ratio 1T:1.3-1.7 kg:0.8-1.1 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 22-27%, makes slurries at inflation 85-95m per hour
3air floatation cell in be the stirring action of 900-1000 rev/min by rotating speed, forming diameter is the bubble of 8-10mm, and collecting the bubble that rises, to carry out second time according to above-mentioned steps selected, and the bubble regathering rising obtains desulfurization slag intermediate V; Roughly selecting with selected excess is desulfurization slag intermediate VII, and desulfurization slag intermediate V is carried out dehydration and concentrates, dry and granulation, obtain the granular desulfurization slag intermediate VI that diameter is 5mm, desulfurization slag intermediate VI uses as the carburant of cast member;
According to desulfurization slag intermediate VII: collecting agent: the ratio 1T:4.9-5.4 kg:3.9-5.4 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 22-27%, makes slurries at inflation 85-95m per hour
3air floatation cell in be the stirring action of 900-1000 rev/min by rotating speed, forming diameter is the bubble of 8-10mm, collect the bubble risen and obtain desulfurization slag intermediate VIII, excess is desulfurization slag intermediate Ⅸ, desulfurization slag intermediate VIII is as building materials raw material, and desulfurization slag intermediate Ⅸ is as steelmaking feed;
D, Shot Blasting: desulfurization slag intermediate II is carried out magnetic separation, then be in the ball blast container of 2500-3000 rev/min at rotating speed, by the mutual Shot Blasting of the particle of desulfurization slag intermediate II, desulfurization slag intermediate Ⅹ is obtained after dedusting, desulfurization slag intermediate Ⅹ is as steelmaking feed, and the dedusting ash after collecting dust-removing is as building materials raw material.
The present invention devises, and collecting agent is set to kerosene; Foaming agent is set to fusel or 2# oil.
The present invention devises, and the steps include:
A, primary election: desulfurization slag is carried out physics primary election, use steel grit block in desulfurization slag as steelmaking feed, obtain the desulfurization slag intermediate I into graininess;
B, screening: be that 12 object screen clothes are separated and obtain composition containing the desulfurization slag intermediate II of ferro element and the desulfurization slag intermediate III of composition carbon elements by diameter desulfurization slag intermediate I, separating plate falls, makes the free vertical drop of desulfurization slag intermediate III along being 18 ° with vertical direction to make desulfurization slag intermediate II, is 19m at air quantity
3under/h effect, remove the dust be attached on desulfurization slag intermediate II and desulfurization slag intermediate III, the dust collected is as building materials raw material;
C, flotation: be set to include and roughly select with selected,
Roughly select: according to desulfurization slag intermediate III: collecting agent: the ratio 1T:4.95kg:5.1kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 26%, make slurries at inflation 94m per hour
3air floatation cell in be the stirring action of 908 revs/min by rotating speed, forming diameter is the bubble of 9.5mm, collects the bubble risen along with floating agent and obtains desulfurization slag intermediate IV;
Selected: according to desulfurization slag intermediate IV: collecting agent: the ratio 1T:1.6 kg:0.9kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 23%, makes slurries at inflation 87m per hour
3air floatation cell in be the stirring action of 950 revs/min by rotating speed, forming diameter is the bubble of 8.9mm, and collecting the bubble that rises, to carry out second time according to above-mentioned steps selected, and the bubble regathering rising obtains desulfurization slag intermediate V; Roughly selecting with selected excess is desulfurization slag intermediate VII, and desulfurization slag intermediate V is carried out dehydration and concentrates, dry and granulation, obtain the granular desulfurization slag intermediate VI that diameter is 5mm, desulfurization slag intermediate VI uses as the carburant of cast member;
According to desulfurization slag intermediate VII: collecting agent: the ratio 1T:4.99 kg:3.98 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 23%, makes slurries at inflation 88m per hour
3air floatation cell in be the stirring action of 920 revs/min by rotating speed, forming diameter is the bubble of 8.2mm, and collect the bubble risen and obtain desulfurization slag intermediate VIII, excess is desulfurization slag intermediate Ⅸ, and desulfurization slag intermediate Ⅸ is as steelmaking feed;
D, Shot Blasting: desulfurization slag intermediate II is carried out magnetic separation, then be in the ball blast container of 2800 revs/min at rotating speed, by the mutual Shot Blasting of the particle of desulfurization slag intermediate II, desulfurization slag intermediate Ⅹ is obtained after dedusting, desulfurization slag intermediate Ⅹ is as steelmaking feed, and the dedusting ash after collecting dust-removing is as building materials raw material;
Collecting agent is set to kerosene, and foaming agent is set to fusel.
In the technical program, desulfurization slag is set to the residue removing molten steel in steel desulfurization process.
In the technical program, the requirement of slurries and bubble is important technical characteristic as the sorting technology means of desulfurization slag, in the technical field of steel mill's desulfurization slag sorting process method, has novelty, creativeness and practicality.
Four, detailed description of the invention
Below in conjunction with embodiment, further describe the present invention, following examples are intended to the present invention instead of limitation of the invention further are described.For the method for separating to desulfurization slag, first embodiment, the steps include:
A, primary election: desulfurization slag is carried out physics primary election, use steel grit block in desulfurization slag as steelmaking feed, obtain the desulfurization slag intermediate I into graininess.
B, screening: be that 10 object screen clothes are separated that to obtain granularity be that the composition of 2.0mm is containing the desulfurization slag intermediate II of ferro element and the desulfurization slag intermediate III of 10 object composition carbon elements by diameter desulfurization slag intermediate I, separating plate falls, makes the free vertical drop of desulfurization slag intermediate III along being 15 ° with vertical direction to make desulfurization slag intermediate II, is 10m at air quantity
3under/h effect, remove the dust be attached on desulfurization slag intermediate II and desulfurization slag intermediate III, the dust collected is as building materials raw material.
C, flotation: be set to include and roughly select with selected,
Roughly select: according to desulfurization slag intermediate III: collecting agent: the ratio 1T:4.9kg:3.9kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 22%, make slurries at inflation 85m per hour
3air floatation cell in be the stirring action of 900 revs/min by rotating speed, forming diameter is the bubble of 8mm, collects the bubble risen along with floating agent and obtains desulfurization slag intermediate IV;
Selected: according to desulfurization slag intermediate IV: collecting agent: the ratio 1T:1.3kg:0.8kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 22%, makes slurries at inflation 85m per hour
3air floatation cell in by rotating speed to be rotating speed the be stirring action of 900 revs/min, forming diameter is the bubble of 8mm, and collecting the bubble that rises, to carry out second time according to above-mentioned steps selected, and the bubble regathering rising obtains desulfurization slag intermediate V; Roughly selecting with selected excess is desulfurization slag intermediate VII, and desulfurization slag intermediate V is carried out dehydration and concentrates, dry and granulation, obtain the granular desulfurization slag intermediate VI that diameter is about 5mm, desulfurization slag intermediate VI uses as the carburant of cast member.
According to desulfurization slag intermediate VII: collecting agent: the ratio 1T:4.9 kg:3.9 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 22%, makes slurries at inflation 85m per hour
3air floatation cell in be the stirring action of 900 revs/min by rotating speed, forming diameter is the bubble of 8mm, and collect the bubble risen and obtain desulfurization slag intermediate VIII, excess is desulfurization slag intermediate Ⅸ, desulfurization slag intermediate VIII is as building materials raw material, and desulfurization slag intermediate Ⅸ is as steelmaking feed.
D, Shot Blasting: desulfurization slag intermediate II is carried out magnetic separation, then be in the ball blast container of 2500 revs/min at rotating speed, by the mutual Shot Blasting of the particle of desulfurization slag intermediate II, desulfurization slag intermediate Ⅹ is obtained after dedusting, desulfurization slag intermediate Ⅹ is as steelmaking feed, and the dedusting ash after collecting dust-removing is as building materials raw material.
In the present embodiment, collecting agent is set to kerosene.
In the present embodiment, foaming agent is set to fusel.
In the present embodiment, when the carbon containing grade of desulfurization slag intermediate VI do not reach require time, can carry out third time, the 4th sorting according to the method for concentrating in third step, but it is selected generally to carry out second time, the phosphorus content of desulfurization slag intermediate VI is just 90-95%.
In the present embodiment, through test, the phosphorus content of desulfurization slag intermediate VI is 90-95%, and desulfurization slag intermediate Ⅸ and desulfurization slag intermediate Ⅹ iron-holder are 90-93%, and the Main Ingredients and Appearance of building materials raw material is the additive that silicates material is suitable as cement.
Desulfurization slag comprehensive utilization process system mainly comprises the sorting purification system of processing of pretreatment system to grain dust in desulfurization slag and grain dust medium high carbon graphite.The sorting purification system of processing of grain dust medium high carbon graphite comprises sorting, purification, product shaping and anury process four broad aspect, namely can realize the anuryization comprehensive utilization of desulfurization slag.
For the method for separating to desulfurization slag, second embodiment, the steps include:
A, primary election: desulfurization slag is carried out physics primary election, use steel grit block in desulfurization slag as steelmaking feed, obtain the desulfurization slag intermediate I into graininess.
B, screening: desulfurization slag intermediate I by diameter be 16 object screen clothes be separated obtain granularity 1.25mm composition containing the desulfurization slag intermediate II of ferro element and the desulfurization slag intermediate III of 16 object composition carbon elements, separating plate falls, makes the free vertical drop of desulfurization slag intermediate III along being 20 ° with vertical direction to make desulfurization slag intermediate II, is 20m at air quantity
3under/h effect, remove the dust be attached on desulfurization slag intermediate II and desulfurization slag intermediate III, the dust collected is as building materials raw material.
C, flotation: be set to include and roughly select with selected,
Roughly select: according to desulfurization slag intermediate III: collecting agent: the ratio 1T:5.4 kg:5.4 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 27%, make slurries at inflation 95m per hour
3air floatation cell in be the stirring action of 1000 revs/min by rotating speed, forming diameter is the bubble of 10mm, collects the bubble risen along with floating agent and obtains desulfurization slag intermediate IV;
Selected: according to desulfurization slag intermediate IV: collecting agent: the ratio 1T:1.7 kg:1.1 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 27%, makes slurries at inflation 95m per hour
3air floatation cell in by rotating speed to be rotating speed the be stirring action of 1000 revs/min, forming diameter is the bubble of 10mm, and collecting the bubble that rises, to carry out second time according to above-mentioned steps selected, and the bubble regathering rising obtains desulfurization slag intermediate V; Roughly selecting with selected excess is desulfurization slag intermediate VII, and desulfurization slag intermediate V is carried out dehydration and concentrates, dry and granulation, obtain the granular desulfurization slag intermediate VI that diameter is about 5mm, desulfurization slag intermediate VI uses as the carburant of cast member.
According to desulfurization slag intermediate VII: collecting agent: the ratio 1T:5.4 kg:5.4 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 27%, makes slurries at inflation 95m per hour
3air floatation cell in be the stirring action of 1000 revs/min by rotating speed, forming diameter is the bubble of 10mm, and collect the bubble risen and obtain desulfurization slag intermediate VIII, excess is desulfurization slag intermediate Ⅸ, desulfurization slag intermediate VIII is as building materials raw material, and desulfurization slag intermediate Ⅸ is as steelmaking feed.
D, Shot Blasting: desulfurization slag intermediate II is carried out magnetic separation, then be in the ball blast container of 3000 revs/min at rotating speed, by the mutual Shot Blasting of the particle of desulfurization slag intermediate II, desulfurization slag intermediate Ⅹ is obtained after dedusting, desulfurization slag intermediate Ⅹ is as steelmaking feed, and the dedusting ash after collecting dust-removing is as building materials raw material.
In the present embodiment, collecting agent is set to kerosene.
In the present embodiment, foaming agent is set to 2# oil.
For the method for separating to desulfurization slag, the 3rd embodiment, the steps include:
A, primary election: desulfurization slag is carried out physics primary election, use steel grit block in desulfurization slag as steelmaking feed, obtain the desulfurization slag intermediate I into graininess.
B, screening: be that 12 object screen clothes are separated that to obtain granularity be 12 object compositions containing the desulfurization slag intermediate II of ferro element and the desulfurization slag intermediate III of 12 object composition carbon elements by diameter desulfurization slag intermediate I, separating plate falls, makes the free vertical drop of desulfurization slag intermediate III along being 17.5 ° with vertical direction to make desulfurization slag intermediate II, is 15m at air quantity
3under/h effect, remove the dust be attached on desulfurization slag intermediate II and desulfurization slag intermediate III, the dust collected is as building materials raw material.
C, flotation: be set to include and roughly select with selected,
Roughly select: according to desulfurization slag intermediate III: collecting agent: the ratio 1T:5.2kg:4.6kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 24.5%, make slurries at inflation 90m per hour
3air floatation cell in be the stirring action of 950 revs/min by rotating speed, forming diameter is the bubble of 9mm, collects the bubble risen along with floating agent and obtains desulfurization slag intermediate IV;
Selected: according to desulfurization slag intermediate IV: collecting agent: the ratio 1T:1.5 kg:1.0 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 24.5%, makes slurries at inflation 90m per hour
3air floatation cell in by rotating speed to be rotating speed the be stirring action of 950 revs/min, forming diameter is the bubble of 9mm, and collecting the bubble that rises, to carry out second time according to above-mentioned steps selected, and the bubble regathering rising obtains desulfurization slag intermediate V; Roughly selecting with selected excess is desulfurization slag intermediate VII, and desulfurization slag intermediate V is carried out dehydration and concentrates, dry and granulation, obtain the granular desulfurization slag intermediate VI that diameter is about 5mm, desulfurization slag intermediate VI uses as the carburant of cast member.
According to desulfurization slag intermediate VII: collecting agent: the ratio 1T:5.2 kg:4.6 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 24.5%, makes slurries at inflation 90m per hour
3air floatation cell in be the stirring action of 950 revs/min by rotating speed, forming diameter is the bubble of 9mm, and collect the bubble risen and obtain desulfurization slag intermediate VIII, excess is desulfurization slag intermediate Ⅸ, desulfurization slag intermediate VIII is as building materials raw material, and desulfurization slag intermediate Ⅸ is as steelmaking feed.
D, Shot Blasting: desulfurization slag intermediate II is carried out magnetic separation, then be in the ball blast container of 2750 revs/min at rotating speed, by the mutual Shot Blasting of the particle of desulfurization slag intermediate II, desulfurization slag intermediate Ⅹ is obtained after dedusting, desulfurization slag intermediate Ⅹ is as steelmaking feed, and the dedusting ash after collecting dust-removing is as building materials raw material.
In the present embodiment, collecting agent is set to kerosene.
In the present embodiment, foaming agent is set to fusel.
For the method for separating to desulfurization slag, the 4th embodiment, the steps include:
A, primary election: desulfurization slag is carried out physics primary election, use steel grit block in desulfurization slag as steelmaking feed, obtain the desulfurization slag intermediate I into graininess.
B, screening: be that 14 object screen clothes are separated that to obtain granularity be 14 object compositions containing the desulfurization slag intermediate II of ferro element and the desulfurization slag intermediate III of 14 object composition carbon elements by diameter desulfurization slag intermediate I, separating plate falls, makes the free vertical drop of desulfurization slag intermediate III along being 18 ° with vertical direction to make desulfurization slag intermediate II, is 19m at air quantity
3under/h effect, remove the dust be attached on desulfurization slag intermediate II and desulfurization slag intermediate III, the dust collected is as building materials raw material.
C, flotation: be set to include and roughly select with selected,
Roughly select: according to desulfurization slag intermediate III: collecting agent: the ratio 1T:4.95kg:5.1kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 26%, make slurries at inflation 94m per hour
3air floatation cell in be the stirring action of 908 revs/min by rotating speed, forming diameter is the bubble of 9.5mm, collects the bubble risen along with floating agent and obtains desulfurization slag intermediate IV;
Selected: according to desulfurization slag intermediate IV: collecting agent: the ratio 1T:1.6 kg:0.9kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 23%, makes slurries at inflation 87m per hour
3air floatation cell in by rotating speed to be rotating speed the be stirring action of 950 revs/min, forming diameter is the bubble of 8.9mm, and collecting the bubble that rises, to carry out second time according to above-mentioned steps selected, and the bubble regathering rising obtains desulfurization slag intermediate V; Roughly selecting with selected excess is desulfurization slag intermediate VII, and desulfurization slag intermediate V is carried out dehydration and concentrates, dry and granulation, obtain the granular desulfurization slag intermediate VI that diameter is about 5mm, desulfurization slag intermediate VI uses as the carburant of cast member.
According to desulfurization slag intermediate VII: collecting agent: the ratio 1T:4.99 kg:3.98 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 23%, makes slurries at inflation 88m per hour
3air floatation cell in be the stirring action of 920 revs/min by rotating speed, forming diameter is the bubble of 8.2mm, and collect the bubble risen and obtain desulfurization slag intermediate VIII, excess is desulfurization slag intermediate Ⅸ, desulfurization slag intermediate VIII is as building materials raw material, and desulfurization slag intermediate Ⅸ is as steelmaking feed.
D, Shot Blasting: desulfurization slag intermediate II is carried out magnetic separation, then be in the ball blast container of 2800 revs/min at rotating speed, by the mutual Shot Blasting of the particle of desulfurization slag intermediate II, desulfurization slag intermediate Ⅹ is obtained after dedusting, desulfurization slag intermediate Ⅹ is as steelmaking feed, and the dedusting ash after collecting dust-removing is as building materials raw material.
In the present embodiment, collecting agent is set to kerosene.
In the present embodiment, foaming agent is set to fusel.
The technique effect of the present embodiment is best.
The present invention has lower feature:
1, owing to devising slurries and bubble, the phosphorus content making the desulfurization slag separator obtained is 90-95%, and desulfurization slag is progressively sub-elected different material, therefore improves the separating grade to desulfurization slag, recycles desulfurization slag.
2, owing to devising slurries and bubble, the desulfurization slag made sub-elects the carburant of steelmaking feed, building materials raw material and cast member, utilizes completely desulfurization slag, no longer produces environment and pollutes.
3, owing to devising slurries and bubble, in assorting room, no longer dust is produced, and classification process gains, the efficiency of separation is high.
Above-described embodiment is a kind of way of realization of steel mill provided by the present invention desulfurization slag sorting process method; according to other distortion of scheme provided by the present invention; the composition increased or reduce wherein or step; or the present invention is used for other the technical field close with the present invention, all belongs to protection scope of the present invention.
Claims (3)
1. steel mill's desulfurization slag sorting process method; It is characterized in that: the steps include:
A, primary election: desulfurization slag is carried out physics primary election, steel grit block in desulfurization slag is used as steelmaking feed, and remaining grain dust is set to desulfurization slag intermediate I;
B, screening: be that 10-16 object screen cloth is separated and obtains composition containing the desulfurization slag intermediate II of ferro element and the desulfurization slag intermediate III of composition carbon elements by diameter desulfurization slag intermediate I, separating plate falls, makes the free vertical drop of desulfurization slag intermediate III along being 15-20 ° with vertical direction to make desulfurization slag intermediate II, is 10-20m at air quantity
3under/h effect, remove the dust be attached on desulfurization slag intermediate II and desulfurization slag intermediate III, the dust collected is as building materials raw material;
C, flotation: be set to include and roughly select with selected,
Roughly select: according to desulfurization slag intermediate III: collecting agent: the ratio 1T:4.9-5.4 kg:3.9-5.4 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 22-27%, make slurries at inflation 85-95m per hour
3air floatation cell in be the stirring action of 900-1000 rev/min by rotating speed, forming diameter is the bubble of 8-10mm, collects the bubble risen along with floating agent and obtains desulfurization slag intermediate IV;
Selected: according to desulfurization slag intermediate IV: collecting agent: the ratio 1T:1.3-1.7 kg:0.8-1.1 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 22-27%, makes slurries at inflation 85-95m per hour
3air floatation cell in be the stirring action of 900-1000 rev/min by rotating speed, forming diameter is the bubble of 8-10mm, and collecting the bubble that rises, to carry out second time according to above-mentioned steps selected, and the bubble regathering rising obtains desulfurization slag intermediate V; Roughly selecting with selected excess is desulfurization slag intermediate VII, and desulfurization slag intermediate V is carried out dehydration and concentrates, dry and granulation, obtain the granular desulfurization slag intermediate VI that diameter is 5mm, desulfurization slag intermediate VI uses as the carburant of cast member;
According to desulfurization slag intermediate VII: collecting agent: the ratio 1T:4.9-5.4 kg:3.9-5.4 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 22-27%, makes slurries at inflation 85-95m per hour
3air floatation cell in be the stirring action of 900-1000 rev/min by rotating speed, forming diameter is the bubble of 8-10mm, collect the bubble risen and obtain desulfurization slag intermediate VIII, excess is desulfurization slag intermediate Ⅸ, desulfurization slag intermediate VIII is as building materials raw material, and desulfurization slag intermediate Ⅸ is as steelmaking feed;
D, Shot Blasting: desulfurization slag intermediate II is carried out magnetic separation, then be in the ball blast container of 2500-3000 rev/min at rotating speed, by the mutual Shot Blasting of the particle of desulfurization slag intermediate II, desulfurization slag intermediate Ⅹ is obtained after dedusting, desulfurization slag intermediate Ⅹ is as steelmaking feed, and the dedusting ash after collecting dust-removing is as building materials raw material.
2. steel mill according to claim 1 desulfurization slag sorting process method; It is characterized in that: collecting agent is set to kerosene;
Foaming agent is set to fusel or 2# oil.
3. steel mill according to claim 1 and 2 desulfurization slag sorting process method; It is characterized in that: the steps include:
A, primary election: desulfurization slag is carried out physics primary election, use steel grit block in desulfurization slag as steelmaking feed, obtain the desulfurization slag intermediate I into graininess;
B, screening: be that 12 object screen clothes are separated and obtain composition containing the desulfurization slag intermediate II of ferro element and the desulfurization slag intermediate III of composition carbon elements by diameter desulfurization slag intermediate I, separating plate falls, makes the free vertical drop of desulfurization slag intermediate III along being 18 ° with vertical direction to make desulfurization slag intermediate II, is 19m at air quantity
3under/h effect, remove the dust be attached on desulfurization slag intermediate II and desulfurization slag intermediate III, the dust collected is as building materials raw material;
C, flotation: be set to include and roughly select with selected,
Roughly select: according to desulfurization slag intermediate III: collecting agent: the ratio 1T:4.95kg:5.1kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 26%, make slurries at inflation 94m per hour
3air floatation cell in be the stirring action of 908 revs/min by rotating speed, forming diameter is the bubble of 9.5mm, collects the bubble risen along with floating agent and obtains desulfurization slag intermediate IV;
Selected: according to desulfurization slag intermediate IV: collecting agent: the ratio 1T:1.6 kg:0.9kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 23%, makes slurries at inflation 87m per hour
3air floatation cell in be the stirring action of 950 revs/min by rotating speed, forming diameter is the bubble of 8.9mm, and collecting the bubble that rises, to carry out second time according to above-mentioned steps selected, and the bubble regathering rising obtains desulfurization slag intermediate V; Roughly selecting with selected excess is desulfurization slag intermediate VII, and desulfurization slag intermediate V is carried out dehydration and concentrates, dry and granulation, obtain the granular desulfurization slag intermediate VI that diameter is 5mm, desulfurization slag intermediate VI uses as the carburant of cast member;
According to desulfurization slag intermediate VII: collecting agent: the ratio 1T:4.99 kg:3.98 kg of foaming agent adds collecting agent and foaming agent, then to add water furnishing concentration be the slurries of 23%, makes slurries at inflation 88m per hour
3air floatation cell in be the stirring action of 920 revs/min by rotating speed, forming diameter is the bubble of 8.2mm, and collect the bubble risen and obtain desulfurization slag intermediate VIII, excess is desulfurization slag intermediate Ⅸ, and desulfurization slag intermediate Ⅸ is as steelmaking feed;
D, Shot Blasting: desulfurization slag intermediate II is carried out magnetic separation, then be in the ball blast container of 2800 revs/min at rotating speed, by the mutual Shot Blasting of the particle of desulfurization slag intermediate II, desulfurization slag intermediate Ⅹ is obtained after dedusting, desulfurization slag intermediate Ⅹ is as steelmaking feed, and the dedusting ash after collecting dust-removing is as building materials raw material;
Collecting agent is set to kerosene, and foaming agent is set to fusel.
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