CN1765600A

CN1765600A - Apparatus for manufacturing coal brick employing byproducts produced in stainless steel production process

Info

Publication number: CN1765600A
Application number: CNA2005100989202A
Authority: CN
Inventors: 孙橼树; 李廷模; 朴一圭; 金中机; 李圣圭; 殷恒洙
Original assignee: Puyou Industtry Co Ltd; Posco Co Ltd
Current assignee: Puyou Industtry Co Ltd; Posco Holdings Inc
Priority date: 2004-09-14
Filing date: 2005-09-14
Publication date: 2006-05-03
Anticipated expiration: 2025-09-14
Also published as: CN100540248C; KR100661242B1; KR20060024727A

Abstract

An apparatus for manufacturing briquettes using a by-product produced from the stainless steel manufacturing process is provided. The said device comprises agitator for mixing the 5-25wt% of water electric furnace dust and finery dust and agitating the mixture, wherein the said dust is generated during the the stainless steel manufacturing process and solely or once discharged at predetermined ratio; an aging machine for hydrating and aging the dusts agitated in the agitator; a blender for blending the dusts aged in the aging machine with poeder caking agent, material for recovering metal, reducer and so on; caking agent mixer for mixing the hybridized material and one or more kinds of caking agent; a molding machine for molding the pressured material into briquettes; a compressor for applying the pressure to the mixed material and increase the compressive strength thereof. Using the said structure, based on the physical property during the stainless steel manufacturing process, a great deal of dust is quickly and continuously retreated, therefore the consumption of dust is reduced, convenient for environment, and reuse of the scrap can obtain economic effect.

Description

Adopt the byproduct that produces in the producing stainless steel process to make the equipment of briquet

Technical field

The present invention relates to a kind of equipment that adopts the byproduct that produces in the producing stainless steel process to make briquet, more particularly, relate to a kind of equipment that adopts the byproduct that produces in the producing stainless steel process to make briquet, industrial waste that produces in producing stainless steel process such as collectable dust and byproduct such as metal fillings, iron oxide etc. can be recycled and utilize with the pollution that controls environment again.

Background technology

Usually, in the stainless steel manufacture process of steel plant, produce dust.Specifically, in the winding-up process of the fusion process of electric furnace and refining furnace, produce dust.This dust is collected by dust-collector, then by the aquation granulating or pour into the sea.

In addition, the dust of collection can be recycling by process as shown in Figure 1.

Simultaneously, a kind of conventional art that adopts the byproduct that produces in the stainless steel manufacture process to make briquet is arranged, this technology be disclosed in the 2004-0020471 Korean Patent open first in.This technology relates to a kind ofly makes dust granuleization so that the method for the byproduct reusable edible that produces in the stainless steel manufacture process in the process of Fig. 1.This method has adopted and has formed the comminutor of ball, thereby has the simple advantage of mounting structure.Yet, because being rotation by comminutor, ball forms, so a little less than the compressive resistance of ball, thereby reduced the speed reducing ratio of fusion electric furnace.In addition, this method is not to realize by continuous process, but realizes by batch processed, makes this method be limited to the produced in small quantities of ball.Therefore, this method is unsuitable for a large amount of productions as steel plant.

Simultaneously, contain under the situation of considerable CaO at heavy dirt (heavy dust), the inside water of comminutor sprays and wears out.Yet, the aquation shown in following reactional equation 1 takes place and discharge a large amount of heat.

[reaction equation 1]

＝15.2kcal/mol

A large amount of when hot when discharging owing to the aquation in the comminutor, the casing of comminutor and rotor blade may be out of shape respectively and be crooked.

Here, the ball shape of making is 10mm or littler small spheroidal bead as diameter, and has 10kg or littler compressive resistance.In addition, the shape of briquet looks like to have rounded edge, the length of side is the rectangle of about 100mm, and unit mass is that 140g is to 180g.Therefore, comminutor is limited in the crystallization that stainless steel becomes the various byproducts that produce in the product process.

Summary of the invention

Therefore, an aspect of of the present present invention provides a kind of equipment that has the byproduct that utilizes environment and voluminous employing to produce to make briquet in producing stainless steel process, physical property based on the byproduct that in producing stainless steel process, produces, this byproduct is manufactured into briquet, make in smelting electrical furnace selective the metal that regains reducing the use of raw material such as scrap metal, and make other material except metal in the slag recovery system, be repeated to utilize.

Aforementioned and/or other aspects of the present invention realize by a kind of equipment is provided, this equipment adopts at least a briquet of selecting in the group of the dust from electric stove, refining furnace dust and the heavy dirt that produce of making from be included in producing stainless steel process, this equipment comprises: agitator, with dust and water mixing and the stirring of selecting; Ager will be also aging by the dust aquation that agitator stirs; Blender will be by ager aging dust and agglomeration agent fusion; Molding machine is molded as briquet with the dust that mixes.

That is, the briquet manufacturing equipment comprises: agitator, and its water with 5～25wt% mixes with dust from electric stove and refining furnace dust and stirs, and described dust is also being discharged with predetermined ratio individually or once of producing in producing stainless steel process; Ager, the dust aquation that will mix with water is also aging; Blender is with fusion such as aging dust and powder agglomates agent, the material that is used to regain metal, reducing agents; The agglomeration agent blender mixes the material that mixes with one or more agglomeration agents; Compressor is exerted pressure and is improved its compressive resistance the material that mixes; Molding machine is molded as briquet with the material that compresses.

Description of drawings

In conjunction with the drawings preferred embodiment is carried out following description, the present invention these and/or other aspect and advantage will become clear and be easier to and understand, wherein:

Fig. 1 adopts the byproduct that produces in producing stainless steel process to make the flow chart of traditional briquet;

Fig. 2 is the flow chart that byproduct that the employing according to the embodiment of the invention produces in producing stainless steel process is made briquet;

Fig. 3 shows the structure according to the briquet manufacturing equipment of the embodiment of the invention;

Fig. 4 shows the ager that uses according to the embodiment of the invention in the briquet manufacturing equipment;

Fig. 5 shows the molding machine that uses according to the embodiment of the invention in the briquet manufacturing equipment.

The specific embodiment

Below, describe in detail according to a preferred embodiment of the invention with reference to the accompanying drawings.

According to the present invention, the content of CaO is different in the dust from electric stove 1 that produces in producing stainless steel process, refining furnace dust 2 and the heavy dirt 3, thereby they are mixed with predetermined ratio.From water storage device 9, add to the proportional water of mixed proportion in the dust that mixes with estimation; Stir by agitator 8; Hydration in ager 10; Mix with agglomeration agent; Be manufactured to briquet by compressor 18 and make-up machine 19.

In addition, the institute's by-product that produces in the producing stainless steel process all is added in the briquet mixture except slag, thereby has improved the quality of briquet or reclaimed metal material.If desired, when the coal of fusion manufacturing in the process below changes, in the briquet mixture, add reducing agent 14, thereby be used for the reduction of metal oxide as catalyst.

Below, [table 1] shows the chemical constituent of the dust that produces in the producing stainless steel process.For reference, % represents wt%.

[table 1]

Project	T-Fe	C	SiO ₂	Al ₂O ₃	P ₂O ₅	S	Mo	CaO	MgO	Cl	Zn
Project	T-Fe	C	SiO ₂	Al ₂O ₃	P ₂O ₅	S	Mo	CaO	MgO	Cl	Zn	Unit	％	％	％	％	％	％	％	％	％	％	％
Dust from electric stove	3.79	0.33	7.04	0.64	0.071	0.134	0.08	4.38	1.29	1.095	5.02	Unit	％	％	％	％	％	％	％	％	％	％	％
Dust from electric stove	3.79	0.33	7.04	0.64	0.071	0.134	0.08	4.38	1.29	1.095	5.02	The refining furnace dust	19.67	0.44	6.32	0.26	0.073	0.098	0.08	23.84	6.72	0.127	0.51
Heavy dirt	20.02	0.67	20.38	0.72	0.066	0.057	0.07	51.68	5.88	0.017	0.01	The refining furnace dust	19.67	0.44	6.32	0.26	0.073	0.098	0.08	23.84	6.72	0.127	0.51
Heavy dirt	20.02	0.67	20.38	0.72	0.066	0.057	0.07	51.68	5.88	0.017	0.01	Mean value	14.49	0.48	11.25	0.54	0.07	0.10	0.08	26.63	4.63	0.41	1.85

Shown in [table 1], with regard to the content of CaO, refining furnace dust 2 is higher than dust from electric stove 1, is lower than heavy dirt 3.In addition, the CaO content in the heavy dirt 3 is much larger than the CaO content of dust from electric stove 1.Dust from electric stove generally is manufactured to the briquet of shaping.Yet the briquet that is shaped by refining furnace dust and heavy dirt is because active reaction and volumetric expansion and break.

Therefore, consider the performance of described dust, described dust mixes with predetermined ratio.To from water storage device 9, join in the dust of mixing with the proportional water of the dust that mixes, thereby carry out stable aquation, prevent that thus after forming briquet briquet from powdering and improve the compressive resistance of briquet.

Below, will be referring to figs. 2 and 3 the operation of describing the equipment of producing briquet.

Fig. 2 is the flow chart that the byproduct that produces in the employing producing stainless steel process according to the embodiment of the invention is made briquet.As shown in the figure, the dust from electric stove 1 that in electric furnace arc process, produces, the refining furnace dust 2 that produces and collect by dust-collector blowing in the spray process of refining furnace, produce in the spray process and the dust of being collected by cyclone collector and the heavy dirt 3 that produces on the raw material pipeline are transported to the workshop by transporting equipment such as truck etc. respectively, and be stored in the different hoppers blowing of refining furnace.

The dust of these generations discharges with predetermined ratio individually or jointly, and is supplied to agitator 8 by conveyer belt 7.Simultaneously, from water storage device 9, supply water, and dust mixes.Subsequently, stir the dust that mixes with water.Perhaps, these dusts can mix individually with from the water in the water storage device 9, stir then.

The independent whipping process of dust will be described below.

At first, dust from electric stove 1 mixes to be incorporated in the agitator 8 with water and stirs.Then, the dust from electric stove 1 of mixing is aging by aquation in ager 10.Shown in table [1], the CaO content that dust from electric stove 1 has is about 4% to 5%.In this case, CaO content is low makes aquation inactive.Therefore, should reduce the addition of water.If the water that adds is excessive, then dust from electric stove 1 lumps, thereby makes raw material inconvenience transmission and bonded in following process.Therefore, the workman must be noted that the addition that makes water.

With reference to following table [2], preferably the water with 5wt% to 10wt% adds in the dust from electric stove 1.

[table 2]

Project	Dust from electric stove	Cement	Metal fillings+metal oxide (1: 1)	Agglomeration agent	Water	Compressive resistance	Comparative result
Project	Dust from electric stove	Cement	Metal fillings+metal oxide (1: 1)	Agglomeration agent	Water	Compressive resistance	Comparative result	Unit	Ton/hour	％	％	％	％	Kilogram	State
Comparative example 1	10.00	6.00	20.00	12.00	2.50	32.00	Powder	Unit	Ton/hour	％	％	％	％	Kilogram	State
Comparative example 1	10.00	6.00	20.00	12.00	2.50	32.00	Powder	Invention example 1	10.00	6.00	20.00	12.00	5.00	85.00	Good
Invention example 2	10.00	6.00	20.00	12.00	7.50	105.00	Good	Invention example 1	10.00	6.00	20.00	12.00	5.00	85.00	Good
Invention example 2	10.00	6.00	20.00	12.00	7.50	105.00	Good	Invention example 3	10.00	6.00	20.00	12.00	10.00	75.00	Good
Comparative example 2	10.00	6.00	20.00	12.00	12.50	45.00	Bonding (poor)	Invention example 3	10.00	6.00	20.00	12.00	10.00	75.00	Good
Comparative example 2	10.00	6.00	20.00	12.00	12.50	45.00	Bonding (poor)	Comparative example 3	10.00	6.00	20.00	12.00	15.00	38.00	Bonding (poor)
Comparative example 4	10.00	6.00	20.00	12.00	20.00	-	Can not use (" caking " phenomenon)	Comparative example 3	10.00	6.00	20.00	12.00	15.00	38.00	Bonding (poor)

Secondly, the refining furnace dust can be located in reason separately, but is not preferred.At this moment, the workman must be careful and processing variation apace.The CaO content of refining furnace dust is about 25wt%.Therefore, with reference to the result of the test in following [table 3], this addition of handling required water separately is preferably 10wt% to 25wt%.

[table 3]

Project	Dust from electric stove	Cement	Metal fillings+metal oxide (1: 1)	Agglomeration agent	Water	Compressive resistance	Comparative result
Project	Dust from electric stove	Cement	Metal fillings+metal oxide (1: 1)	Agglomeration agent	Water	Compressive resistance	Comparative result	Unit	Ton/hour	％	％	％	％	Kilogram	State
Comparative example 5	10.00	6.00	20.00	12.00	2.50	32.00	Can not use	Unit	Ton/hour	％	％	％	％	Kilogram	State
Comparative example 5	10.00	6.00	20.00	12.00	2.50	32.00	Can not use	Comparative example 6	10.00	6.00	20.00	12.00	5.00	85.00	Powder
Comparative example 7	10.00	6.00	20.00	12.00	7.50	105.00	Powder	Comparative example 6	10.00	6.00	20.00	12.00	5.00	85.00	Powder
Comparative example 7	10.00	6.00	20.00	12.00	7.50	105.00	Powder	Invention example 4	10.00	6.00	20.00	12.00	10.00	75.00	Good
Invention example 5	10.00	6.00	20.00	12.00	12.50	45.00	Good	Invention example 4	10.00	6.00	20.00	12.00	10.00	75.00	Good
Invention example 5	10.00	6.00	20.00	12.00	12.50	45.00	Good	Invention example 6	10.00	6.00	20.00	12.00	15.00	38.00	Good
Invention example 7	10.00	6.00	20.00	12.00	17.50	-	Good	Invention example 6	10.00	6.00	20.00	12.00	15.00	38.00	Good
Invention example 7	10.00	6.00	20.00	12.00	17.50	-	Good	Invention example 8	10.00	6.00	20.00	12.00	20.00	10.00	Good
Invention example 9	10.00	6.00	20.00	12.00	25.00	10.00	Good	Invention example 8	10.00	6.00	20.00	12.00	20.00	10.00	Good
Invention example 9	10.00	6.00	20.00	12.00	25.00	10.00	Good	Comparative example 8	10.00	6.00	20.00	12.00	30.00	10.00	Bonding (poor)
Comparative example 9	10.00	6.00	20.00	12.00	20.00	10.00	Can not use	Comparative example 8	10.00	6.00	20.00	12.00	30.00	10.00	Bonding (poor)

At last, handling separately under the situation of heavy dirt, the CaO content of heavy dirt is about 50wt% to 60wt%.With reference to the result of the test in following [table 3], even add the water of any amount, this processing also can not be used.

[table 4]

Project	Dust from electric stove	Cement	Metal fillings+metal oxide (1: 1)	Agglomeration agent	Water	Compressive resistance	Comparative result
Project	Dust from electric stove	Cement	Metal fillings+metal oxide (1: 1)	Agglomeration agent	Water	Compressive resistance	Comparative result	Unit	Ton/hour	％	％	％	％	Kilogram	State
Comparative example 10	10.00	6.00	20.00	12.00	5.00	-	Can not use	Unit	Ton/hour	％	％	％	％	Kilogram	State
Comparative example 10	10.00	6.00	20.00	12.00	5.00	-	Can not use	Comparative example 11	10.00	6.00	20.00	12.00	7.50	-	Can not use
Comparative example 12	10.00	6.00	20.00	12.00	10.00	5.00	Powder	Comparative example 11	10.00	6.00	20.00	12.00	7.50	-	Can not use
Comparative example 12	10.00	6.00	20.00	12.00	10.00	5.00	Powder	Comparative example 13	10.00	6.00	20.00	12.00	12.50	7.00	Powder
Comparative example 14	10.00	6.00	20.00	12.00	15.00	9.00	Powder	Comparative example 13	10.00	6.00	20.00	12.00	12.50	7.00	Powder
Comparative example 14	10.00	6.00	20.00	12.00	15.00	9.00	Powder	Comparative example 15	10.00	6.00	20.00	12.00	17.50	8.00	Powder
Comparative example 16	10.00	6.00	20.00	12.00	20.00	13.00	Powder	Comparative example 15	10.00	6.00	20.00	12.00	17.50	8.00	Powder

Comparative example 17	10.00	6.00	20.00	12.00	25.00	17.00	Powder
Comparative example 17	10.00	6.00	20.00	12.00	25.00	17.00	Powder	Comparative example 18	10.00	6.00	20.00	12.00	30.00	-	The equipment of difference
Comparative example 19	10.00	6.00	20.00	12.00	35.00	-	Bonding (poor)	Comparative example 18	10.00	6.00	20.00	12.00	30.00	-	The equipment of difference
Comparative example 19	10.00	6.00	20.00	12.00	35.00	-	Bonding (poor)	Comparative example 20	10.00	6.00	20.00	12.00	40.00	-	Can not use

Result of the test as the aforementioned, according to the kind of dust, dust can be located in reason separately, but should note problems such as powder, bonding, observes thereby have to require the workman to want careful.

Below, will describe with predetermined ratio discharging dust and the process that they are mixed.

In general producing stainless steel process, with ratio generation dust from electric stove and refining furnace dust much at one.Yet, to compare with the refining furnace dust with dust from electric stove, the amount of the heavy dirt of generation is less relatively.Therefore, adopt about 1: 1 ratio to mix dust from electric stove and refining furnace dust, on demand heavy dirt is added in the dust of mixing then.

1: 1 ratio of following employing is mixed dust from electric stove and refining furnace dust.

With reference to following [table 5], when dust from electric stove and refining furnace dust mixed with 1: 1 ratio, the addition of preferred water was about 10wt% to 20wt%.At this moment, the content of CaO is about 15wt%.

[table 5]

Project	Dust from electric stove	The refining furnace dust	Cement	Metal fillings+metal oxide (1: 1)	Agglomeration agent	Water	Compressive resistance	Comparative result
Project	Dust from electric stove	The refining furnace dust	Cement	Metal fillings+metal oxide (1: 1)	Agglomeration agent	Water	Compressive resistance	Comparative result	Unit	Ton/hour	Ton/hour	％	％	％	％	Kilogram	State
Comparative example 21	5.00	5.00	6.00	20.00	12.00	2.25	-	Can not use	Unit	Ton/hour	Ton/hour	％	％	％	％	Kilogram	State
Comparative example 21	5.00	5.00	6.00	20.00	12.00	2.25	-	Can not use	Comparative example 22	5.00	5.00	6.00	20.00	12.00	5.00	32.00	Can not use
Comparative example 23	5.00	5.00	6.00	20.00	12.00	7.50	35.00	Powder	Comparative example 22	5.00	5.00	6.00	20.00	12.00	5.00	32.00	Can not use
Comparative example 23	5.00	5.00	6.00	20.00	12.00	7.50	35.00	Powder	Invention example 10	5.00	5.00	6.00	20.00	12.00	10.00	66.00	Good
Invention example 11	5.00	5.00	6.00	20.00	12.00	12.50	65.00	Good	Invention example 10	5.00	5.00	6.00	20.00	12.00	10.00	66.00	Good
Invention example 11	5.00	5.00	6.00	20.00	12.00	12.50	65.00	Good	Invention example 12	5.00	5.00	6.00	20.00	12.00	15.00	93.00	Good
Invention example 13	5.00	5.00	6.00	20.00	12.00	17.50	102.00	Good	Invention example 12	5.00	5.00	6.00	20.00	12.00	15.00	93.00	Good
Invention example 13	5.00	5.00	6.00	20.00	12.00	17.50	102.00	Good	Invention example 14	5.00	5.00	6.00	20.00	12.00	20.00	86.00	Good
Comparative example 24	5.00	5.00	6.00	20.00	12.00	22.50	42.00	Have scarce	Invention example 14	5.00	5.00	6.00	20.00	12.00	20.00	86.00	Good

								Fall into
								Fall into	Comparative example 25	5.00	5.00	6.00	20.00	12.00	25.00	39.00	Bonding (poor)
Comparative example 26	5.00	5.00	6.00	20.00	12.00	30.00	-	Can not use	Comparative example 25	5.00	5.00	6.00	20.00	12.00	25.00	39.00	Bonding (poor)

When weighing dirt according to required interpolation, dust from electric stove, refining furnace dust and heavy dirt are discharged with 1: 1: 0.5 ratio.

Below [table 6] show when dust from electric stove, refining furnace dust and heavy dirt are discharged with 1: 1: 0.5 ratio, the addition of water is that the content of about 15wt% to 25wt% and CaO is about 18wt%.

Project	Dust from electric stove	The refining furnace dust	Heavy dirt	Cement	Metal fillings+metal oxide (1: 1)	Agglomeration agent	Water	Compressive resistance	Comparative result
Project	Dust from electric stove	The refining furnace dust	Heavy dirt	Cement	Metal fillings+metal oxide (1: 1)	Agglomeration agent	Water	Compressive resistance	Comparative result	Unit	Ton/hour	Ton/hour	Ton/hour	％	％	％	％	Kilogram	State
Comparative example 27	4.00	4.00	2.00	6.00	20.00	12.00	5.00	-	Can not use	Unit	Ton/hour	Ton/hour	Ton/hour	％	％	％	％	Kilogram	State
Comparative example 27	4.00	4.00	2.00	6.00	20.00	12.00	5.00	-	Can not use	Comparative example 28	4.00	4.00	2.00	6.00	20.00	12.00	7.50	28.00	Defective is aging
Comparative example 29	4.00	4.00	2.00	6.00	20.00	12.00	10.00	38.00	Powder	Comparative example 28	4.00	4.00	2.00	6.00	20.00	12.00	7.50	28.00	Defective is aging
Comparative example 29	4.00	4.00	2.00	6.00	20.00	12.00	10.00	38.00	Powder	Invention example 15	4.00	4.00	2.00	6.00	20.00	12.00	12.50	46.00	Defectiveness
Invention example 16	4.00	4.00	2.00	6.00	20.00	12.00	15.00	65.00	Good	Invention example 15	4.00	4.00	2.00	6.00	20.00	12.00	12.50	46.00	Defectiveness
Invention example 16	4.00	4.00	2.00	6.00	20.00	12.00	15.00	65.00	Good	Invention example 17	4.00	4.00	2.00	6.00	20.00	12.00	17.50	92.00	Good
Invention example 18	4.00	4.00	2.00	6.00	20.00	12.00	20.00	89.00	Good	Invention example 17	4.00	4.00	2.00	6.00	20.00	12.00	17.50	92.00	Good
Invention example 18	4.00	4.00	2.00	6.00	20.00	12.00	20.00	89.00	Good	Invention example 19	4.00	4.00	2.00	6.00	20.00	12.00	22.50	76.00	Good
Comparative example 30	4.00	4.00	2.00	6.00	20.00	12.00	25.00	56.00	Good	Invention example 19	4.00	4.00	2.00	6.00	20.00	12.00	22.50	76.00	Good
Comparative example 30	4.00	4.00	2.00	6.00	20.00	12.00	25.00	56.00	Good	Comparative example 31	4.00	4.00	2.00	6.00	20.00	12.00	30.00	39.00	Defectiveness
Comparative example 32	4.00	4.00	2.00	6.00	20.00	12.00	35.00	-	Can not use	Comparative example 31	4.00	4.00	2.00	6.00	20.00	12.00	30.00	39.00	Defectiveness

With reference to Fig. 2 and Fig. 3, dust from electric stove 1, refining furnace dust 2 and heavy dirt 3 are discharged with predetermined ratio from each storage hopper by the tapping equipment as revolving valve etc.The dust of discharging is transmitted by conveyer belt 7, and is introduced in the agitator 8 with rotor blade (not shown).In agitator 8, dust mixes with the water of supply from water storage device 9, is stirred then.Here, the water from water storage device 9 is supplied in the agitator 8 by injection nozzle 9.At this moment, the water of supply preferably has enough temperature to help hydration.Yet the glassware for drinking water of supply has room temperature or lower temperature, so just postpones hydration reaction, but can use.

After stirring the mixture of dust and water, stirred mixture is discharged into ager 10 from agitator 8, is worn out by aquation.Simultaneously, Fig. 4 show at 2000-0013357 number the Korean Patent that is entitled as " ANAGING MACHINE FOR AGING CAO CONTAINING DUST TOMANUFACTURE BRIQUTTE " open in disclosed ager.This ager shown in Figure 4 can be used as ager 10 according to an embodiment of the invention.For reference, this patent can be applicable to embodiments of the invention.

In order to strengthen aging effect, comprise ager 10-a and following ager 10-b according to the ager 10 of the embodiment of the invention.Among last ager 10-a and the following ager 10-b at least one is provided with steam remover 11.Steam remover 11 links to each other with at least one ager.For example, steam remover 11 links to each other with the discharge orifice of last ager 10-a and is communicated with it, makes the steam that produces owing to the aquation among the last ager 10-a be discharged into the outside by steam remover 11 by discharge orifice.As the example of steam remover 11, can adopt dust-collector, but be not limited thereto.Perhaps, as long as can remove the steam that in ager, produces, can use arbitrary device as steam remover 11.

In ager 10, the thermal conductance of the high-temperature that produces owing to the chemical hydration effect causes and produces a large amount of steam.At this moment, traditional ager is sealed, makes steam can not be discharged into the outside and is accommodated in the ager.Therefore, in traditional ager, the dust under the aquation comprises too much water and caking, makes and can not continue following processes.

In order to address this problem, according to embodiments of the invention, at the upside formation discharge orifice of ager 10, dust-collector 11 is connected with this discharge orifice.Dust-collector 11 can change dust according to the internal temperature of ager 10 and collect air-flow.

As a result, in ager 10, finish aquation after, the moisture in the dust is about 5wt% to 10wt%.

Usually, dust is aging by aquation and quilt at ager 10.Yet, handling under the situation of a large amount of dusts with raising output, in ager 10, can not finish aquation and burin-in process, make not exclusively aging dust be stored in the container or and pile heap in a certain place.For this reason, ager 10 for example descends the waste side of slaking 0-b, is provided with two or more hoppers 12.Not exclusively aging dust discharges and is stored in the first hopper 12-a from the waste side of following ager 10-b, and aging fully dust is stored among the second hopper 12-b.Perhaps, hopper 12 can be set to monomer.

When dust was worn out in ager 10 and/or hopper 12 fully, calcium oxide became calcium hydroxide.Even calcium hydroxide mixes with one or more other materials, can not cause taking place as this problem of exploding yet.Therefore, Lao Hua dust can mix with agglomeration agent fully, and by following technology, for example uses the technology of forming rolls to be manufactured into briquet as final products.

Preferably, in order to improve the hardness of changeing and to regain and reduce metal material from other byproducts, can in aging fully dust, add additive as the coal of final products.

For example, be used to improve the hardness of the coal commentaries on classics of producing as final products as the powder of cement 13 grades; Select at least a metal material that is used to regain from the group that comprises rolling iron oxide 4, annealed metal bits 5 and magnetic separation skull 6, rolling iron oxide 4, annealed metal bits 5 and magnetic separation skull 6 are the byproducts that produce in producing stainless steel process; Reducing agent 14 is used for reduction.

Rolling iron oxide 4 is the byproducts that produce in the hot-rolled stainless steel process, and it can not be used in other respects except only being used for regaining the metal material that is included in iron oxide.That is 4 pairs of not influences of hardness of rolling iron oxide, as the briquet of final products.Below, [table 7] shows the chemical constituent of rolling iron oxide 4.

[table 7]

Project	T-Fe	C	SiO ₂	Al ₂O ₃	P ₂O ₅	S	Mo	CaO	MgO	Cl	Zn
Project	T-Fe	C	SiO ₂	Al ₂O ₃	P ₂O ₅	S	Mo	CaO	MgO	Cl	Zn	Iron oxide	3.79	0.33	7.04	0.64	0.071	0.134	0.08	4.38	1.29	1.095	5.02

Annealed metal bits 5 are the byproducts that produce in the process of stainless steel annealing and pickling.Annealed metal bits 5 are agglomerating as thin and long fiber cotton, and oil-containing.The chemical constituent of annealed metal bits 5 has been shown in following [table 8].

[table 8]

Project	T-Fe	Cr	Ni	Mn	Oil
Project	T-Fe	Cr	Ni	Mn	Oil	Unit	％	％	％	％	％
Sample 1	63.70	15.61	6.51	0.91	11.56	Unit	％	％	％	％	％
Sample 1	63.70	15.61	6.51	0.91	11.56	Sample 2	65.10	14.99	5.76	0.78	12.10

Sample 3	64.55	15.38	3.78	0.46	11.90
Sample 3	64.55	15.38	3.78	0.46	11.90	Sample 4	65.80	16.12	6.00	0.59	13.28
Mean value	64.79	15.33	5.51	0.69	12.21	Sample 4	65.80	16.12	6.00	0.59	13.28

When annealed metal bits 5 are added in the aging fully dust, be included in oil in the annealed metal bits 5 as agglomeration agent, and thin and long metal fillings makes dust granule agglomerating as agglomeration agent.This annealed metal is considered the amount of the agglomeration agent of the costliness that can reduce consumption to be worth doing.Yet, being higher than at annealed metal bits under 20% the situation of dust content, the annealed metal bits have the opposite effect.Therefore, the consumption of annealed metal bits is limited to 20% of dust.Following [table 9] shows the hardness according to the briquet of the addition of annealed metal bits.

[table 9]

Project	Dust from electric stove	The refining furnace dust	Cement	Iron oxide	Agglomeration agent	Water	Metal fillings	Compressive resistance	Relatively
Project	Dust from electric stove	The refining furnace dust	Cement	Iron oxide	Agglomeration agent	Water	Metal fillings	Compressive resistance	Relatively	Unit	Ton/hour	Ton/hour	％	％	％	％	％	Kilogram	State
Comparative example 33	5.00	5.00	6.00	10.00	12.00	2.50	5.00	79.00	Good	Unit	Ton/hour	Ton/hour	％	％	％	％	％	Kilogram	State
Comparative example 33	5.00	5.00	6.00	10.00	12.00	2.50	5.00	79.00	Good	Invention example 20	5.00	5.00	6.00	10.00	12.00	5.00	10.00	85.00	Good
Invention example 21	5.00	5.00	6.00	10.00	12.00	7.50	15.00	105.00	Good	Invention example 20	5.00	5.00	6.00	10.00	12.00	5.00	10.00	85.00	Good
Invention example 21	5.00	5.00	6.00	10.00	12.00	7.50	15.00	105.00	Good	Invention example 22	5.00	5.00	6.00	10.00	12.00	10.00	20.00	75.00	Good
Comparative example 34	5.00	5.00	6.00	10.00	12.00	12.50	25.00	45.00	Fracture	Invention example 22	5.00	5.00	6.00	10.00	12.00	10.00	20.00	75.00	Good
Comparative example 34	5.00	5.00	6.00	10.00	12.00	12.50	25.00	45.00	Fracture	Comparative example 35	5.00	5.00	6.00	10.00	12.00	15.00	30.00	38.00	Fracture
Comparative example 36	5.00	5.00	6.00	10.00	12.00	20.00	35.00	-	Can not use	Comparative example 35	5.00	5.00	6.00	10.00	12.00	15.00	30.00	38.00	Fracture

Simultaneously, the most of byproducts that produce in producing stainless steel process are oxygen containing oxide.Therefore, add reducing agent 14, obtain simple metal thus with reduction by-product.

When reducing agent 14 was added in the aging fully dust, the byproduct that is included in the oxide in the aging fully dust was reduced in process subsequently, thereby obtains high-quality metal material.In addition, in reduction process, therefore reducing agent helps reduction reaction more as catalyst, thereby lowers the cost of reduction reaction.

Here, coke (C), silicon (Si), aluminium (Al) etc. are used as the reducing agent of the byproduct that is used for reduced oxide.Reduction reaction according to the reducing agent kind is as follows.

1) coke

2) silicon

3) aluminium

As mentioned above, aging fully dust in hopper 12-a and 12-b and finished ground cement 13, reducing agent 14 and at least a fusion of selecting from the group that comprises rolling iron oxide 4, annealed metal bits 5 and magnetic separation skull 6 in blender 15 are supplied to agglomeration agent blender 17 then.At this moment, agglomeration agent 16 can additionally be fed in the agglomeration agent blender 17.

In agglomeration agent blender 17, finished ground cement 13 grades are used as agglomeration agent.Yet, also need the liquid agglomeration agent to improve hardness as the briquet of final products.For example, syrup is used as the liquid agglomeration agent.Perhaps, available other liquid agglomeration agents replace syrup.Here, syrup extracts in the sugarcane or refining is come out, and is used as the adhesive between the material, thereby improves the compressive resistance of briquet.Following [table 10] shows the compressive resistance according to the briquet of the addition of agglomeration agent.

[table 10]

Project

Dust from electric stove

The refining furnace dust

Heavy dirt

Cement

Metal fillings+metal

Time delay

Water

Agglomeration agent

Compressive resistance

Comparative result

					Oxide (1: 1)
					Oxide (1: 1)						Unit	Ton/hour	Ton/hour	Ton/hour	％	％	Hour	％	％	Kilogram	State
Comparative example 37	4.00	4.00	2.00	6.00	20.00	8.00	20.00	2.00	25.00	Difference	Unit	Ton/hour	Ton/hour	Ton/hour	％	％	Hour	％	％	Kilogram	State
Comparative example 37	4.00	4.00	2.00	6.00	20.00	8.00	20.00	2.00	25.00	Difference	Comparative example 38	4.00	4.00	2.00	6.00	20.00	8.00	20.00	4.00	31.00	Difference
Comparative example 39	4.00	4.00	2.00	6.00	20.00	8.00	20.00	6.00	33.00	Difference	Comparative example 38	4.00	4.00	2.00	6.00	20.00	8.00	20.00	4.00	31.00	Difference
Comparative example 39	4.00	4.00	2.00	6.00	20.00	8.00	20.00	6.00	33.00	Difference	Comparative example 40	4.00	4.00	2.00	6.00	20.00	8.00	20.00	8.00	35.00	Difference
Comparative example 41	4.00	4.00	2.00	6.00	20.00	8.00	20.00	10.00	87.00	Good	Comparative example 40	4.00	4.00	2.00	6.00	20.00	8.00	20.00	8.00	35.00	Difference
Comparative example 41	4.00	4.00	2.00	6.00	20.00	8.00	20.00	10.00	87.00	Good	Comparative example 42	4.00	4.00	2.00	6.00	20.00	8.00	20.00	12.00	96.00	Good
Comparative example 43	4.00	4.00	2.00	6.00	20.00	8.00	20.00	14.00	79.00	Good	Comparative example 42	4.00	4.00	2.00	6.00	20.00	8.00	20.00	12.00	96.00	Good
Comparative example 43	4.00	4.00	2.00	6.00	20.00	8.00	20.00	14.00	79.00	Good	Comparative example 44	4.00	4.00	2.00	6.00	20.00	8.00	20.00	16.00	89.00	Good
Comparative example 45	4.00	4.00	2.00	6.00	20.00	8.00	20.00	18.00	101.00	Good	Comparative example 44	4.00	4.00	2.00	6.00	20.00	8.00	20.00	16.00	89.00	Good

Shown in [table 10], when the content of agglomeration agent less than 10% the time make that final briquet is defective because compressive resistance is low.When the content of agglomeration agent greater than 10% the time, final briquet has good compressive resistance.Therefore, use 10% to 14% agglomeration agent, thereby the waste that prevents expensive agglomeration agent is used.

Here, common blender can be used as agglomeration agent blender 17, but is not limited thereto.Perhaps, as long as can use arbitrary device as mixing usefulness.

In order to improve the compressive resistance as the briquet of the final products of the material that mixes with agglomeration agent, compressor 18 can be used as minimizes the volume of briquet.

Usually, screw can be used as compressor 18, but is not limited thereto.Perhaps, as long as can reduce the volume of briquet, can use arbitrary device as compressor 18.Simultaneously, do not need to have under the situation of high compressive resistance, can omit the compression process of using compressor 18 at briquet.

As mentioned above, be introduced in the molding machine 19, be moulded briquet then with reservation shape by the material of compressor 18 compressions or the material that mixes by agglomeration agent blender 17.Fig. 5 shows at 2000-0013972 number disclosed molding machine in the Korean patent publication that is entitled as " APPARATUS AND METHOD FOR CONTROLLINGBRIQUETTE MOLDING MACHINE ".Molding machine shown in Fig. 5 can be used as the compressor 18 according to the embodiment of the invention.For reference, this patent can be applicable to embodiments of the invention.

The briquet that unloads from molding machine 19 is transferred to the depots (not shown), oven dry 8 hours or longer time under room temperature or heated condition.Therefore, further brought up to the compressive resistance of briquet, and effectively be applied in subsequently the process.

According to embodiments of the invention, use the byproduct that in producing stainless steel process, produces to make briquet, thereby can fast and handle a large amount of dusts more continuously, and can recycling economically certain refuse.

Although illustrated and described some embodiment of the present invention, but it should be appreciated by those skilled in the art, under the situation that does not break away from principle of the present invention and spirit, can make change to embodiment, scope of the present invention is limited by claim and equivalent thereof.

The application requires to be submitted on September 14th, 2004 interests of the 2004-73562 korean patent application of Korea S Department of Intellectual Property, and this application all is disclosed in this, for reference.

Claims

1, a kind of equipment of making briquet, this equipment adopt at least a briquet of selecting in the group of the dust from electric stove, refining furnace dust and the heavy dirt that produce of making from be included in producing stainless steel process, this equipment comprises:

Agitator is with dust and the water mixing and the stirring of described selection;

Ager will be also aging by the described dust aquation that described agitator stirs;

Blender will be by described ager aging described dust and agglomeration agent fusion;

Molding machine is molded as described briquet with the dust of described mixing.

2, equipment according to claim 1 also comprises:

Oxide storage hopper is used for being fed to described blender from least a metal oxide that the group that comprises rolling iron oxide, annealed metal bits and magnetic separation skull is selected;

Reducing agent storage hopper is used to supply reducing agent.

3, equipment according to claim 1, wherein, described agglomeration agent comprises powdery type cement.

4, equipment according to claim 3, wherein, described ager comprises discharge orifice, the steam that produces owing to aquation in the ager discharges by this discharge orifice,

Described equipment also comprises the moisture discharge device, and described device links to each other with described discharge orifice and communicates.