KR100995371B1 - A crusher's liner and manufacturing method thereof - Google Patents

A crusher's liner and manufacturing method thereof Download PDF

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Publication number
KR100995371B1
KR100995371B1 KR1020100079118A KR20100079118A KR100995371B1 KR 100995371 B1 KR100995371 B1 KR 100995371B1 KR 1020100079118 A KR1020100079118 A KR 1020100079118A KR 20100079118 A KR20100079118 A KR 20100079118A KR 100995371 B1 KR100995371 B1 KR 100995371B1
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KR
South Korea
Prior art keywords
liner
grinder
manufacturing
drum
temperature
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KR1020100079118A
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Korean (ko)
Inventor
송흥섭
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주식회사 신흥기공
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/02—Casting in, on, or around objects which form part of the product for making reinforced articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/08—Shaking, vibrating, or turning of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D30/00—Cooling castings, not restricted to casting processes covered by a single main group
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/132—Waste materials; Refuse; Residues
    • C04B33/135—Combustion residues, e.g. fly ash, incineration waste
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor

Abstract

PURPOSE: A liner for a grinder and a manufacturing method thereof are provided to improve strength by forming multiple ribs on the outer surface of a drum and to improve abrasion-resistance by thermally treating the liner. CONSTITUTION: A manufacturing method if a liner for a grinder is as follows. A casting material, made of carbon, silicon, manganese, phosphorus, sulfur chrome, nickel, and iron, is put into a mold frame and is casted(S1). The casted steel member is put into a furnace(S2). The casted steel member is heated for an hour with 1050(S3). The heated steel member is extracted and is cooled using a water cooling method.

Description

Liner for crusher and manufacturing method thereof {A CRUSHER'S LINER AND MANUFACTURING METHOD THEREOF}

The present invention relates to a liner for a pulverizer and a method of manufacturing the same, and more particularly, to a liner for pulverizing a pulverizer, which is an outer appearance of a pulverizer for pulverizing an ash in a molten solidified state, The present invention relates to a grinder liner and a method for manufacturing the same, which are capable of withstanding vibration and shock to suppress deformation and breakage.

In general, coal-fired power plants employ a method of pulverizing coal into pulverized coal and burning it in a boiler.

The molten ash components falling on the bottom of the boiler burned in the boiler are quenched and solidified to form an ash as a mass. The ash (ash) is finely pulverized for the purpose of special purpose recycling.

In order to grind the ash, an ash grinder is provided. The ash grinder grinds the supplied ash to 200 mesh or more to produce high-strength secondary products for fire resistance. It is widely used.

1A and 1B are a side view and a front view showing a general Ash grinder.

As shown in Figure 1a to Figure 1b, the conventional Ash grinder (100 ') is formed on the upper and lower portions of the body (102') having an inlet (120 ') and an outlet (122'), Lower drums 113 'and 115'; Upper and lower liners UA 'and DA' inserted into the upper and lower drums 113 'and 115'; A grinding module (109 ') consisting of circular bars installed in the upper and lower liners (UA', DA '); And a vibration device 107 'provided on the lower liner DA'.

The upper and lower liners UA 'and DA' are generally manufactured using castings, and are formed in a cylindrical shape so that the interval between the inner and outer circumferential surfaces is the same, and the upper and lower drums 113 'and 115' A plurality of holes are provided so as to correspond to the length.

An inlet 120 'is formed at a rear surface of the upper drum 113', and an outlet 122 'is formed at the lower drum 115' to discharge finely crushed ash. A moving passage 121 'is formed between the upper drum 113' and the lower drum 115 '.

A plurality of crushing modules 109 'are formed between the upper liner UA' coupled to the upper drum 113 'and the lower liner DA' coupled to the lower drum 115 '.

The grinding module 109 'is a rod having a circular cross section, the length of which is substantially the same as the upper and lower liners UA' and DA ', and is not fixed to the upper and lower liners UA' and DA '. It is installed in a state that does not.

When the ash grinder 100 ′ configured as described above is provided with ash to the upper drum 113 ′, vibration is transmitted by the vibrator 107 ′, and the pulverization module 109 ′ is provided with upper and lower liners by the transmitted vibration. (UA ', DA') while crushing the introduced ash.

That is, when the ash having a shape in the upper portion is introduced through the inlet 120 ', the ash is moved by the vibration of the grinding module 109' to finely crush the injected ash first, and the crushed ash is thus moved through the passage 121 '. And the delivered ash is operated in a form that is finely pulverized by the second crushing module 109 'and discharged to the discharge port 122'.

However, since the liner is manufactured by casting, when the grinding module is operated by vibration, a part of the liner is broken by impact when repeated collision with the inner surface of the drum, and thus, the expensive liner, which is mostly dependent on imports, needs to be frequently replaced. The loss cost and the replacement cost of the driving stop time are increased, and there is a problem in that one side of the drum is scraped off due to the broken liner.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a drum and a liner which are capable of improving the strength and abrasion resistance of the drum and liner by protruding a plurality of ribs on the outer circumferential surface of the drum, It is an object to provide a liner and a method of manufacturing the same.

It is an object of the present invention to provide a method for manufacturing a liner to be mounted on upper and lower drums constituting a pulverizer, comprising the steps of: 1) casting a casting material into a mold after curing; Two steps of putting the steel material cast in the first step into the heat treatment furnace; Heating the heat treatment furnace to 100 ° C. per hour to heat the temperature in the heat treatment furnace to 950 to 1050 ° C .; It can be achieved by a method for producing a liner for a pulverizer comprising a four step of extracting and cooling after a predetermined time.

The above three processes are characterized in that they are maintained at 1,050 占 폚 for 1 hour.

Cooling of the four process is characterized in that the water cooling system.

The casting material of the above step is a mixture of carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), nickel (Ni) It features.

The casting material may further include one selected from tungsten (W), vanadium (V), and molybdenum (Mo).

In the case where any one of tungsten (W), vanadium (V), and molybdenum (Mo) is further mixed, the third step is a step 3-1 in which the temperature is raised to 40 DEG C at 800 DEG C per hour, It characterized in that it comprises a 3-2 step of raising the temperature.

According to the present invention, there is an effect that strength and abrasion resistance can be improved by heat treatment after casting of the liner.

In addition, by forming a plurality of ribs on the outer peripheral surface of the drum to increase the strength, there is a secondary effect that can improve the wear resistance.

1A-1B are side and front views of a typical ash grinder.
2 is a front view showing a grinder equipped with a grinder liner according to the present invention;
3 is a side view showing a grinder equipped with a grinder liner according to the present invention;
Figure 4 is a flow chart showing a manufacturing process of the liner for a grinder according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a front view showing a grinder equipped with a grinder liner according to the present invention, Figure 3 is a side view showing a grinder equipped with a grinder liner according to the present invention.

As shown in FIGS. 2 and 3, the crusher A equipped with the crusher liner according to the present invention comprises: upper and lower drums 2, 4 installed on the upper and lower parts of the body 1; Upper and lower liners (UA, DA) mounted respectively inside the upper and lower drums (2,4); A crushing module 8 installed inside the upper and lower liners UA and DA, respectively; And a vibration device (6) coupled to the lower drum (4).

In particular, the upper and lower drums 2 and 4 have a plurality of ribs R protruding from the outer circumferential surface thereof.

The upper drum (2) has a cylindrical shape having a predetermined length, a space in which the ash is stored is formed in the inner side, an inlet (20) for injecting the ash is formed in the upper portion, the movement passage 24 is formed in the lower portion And the ribs R are formed intensively in the middle portion of the upper drum 2. [

As shown in FIG. 2, it is preferable that about seven ribs R are formed in the upper drum 2, and five ribs R are formed in the intermediate portion, and the other two ribs R are formed in the upper portion Are formed on the outer circumferential surfaces of the opposite ends of the drum 2, respectively.

Of course, the number of the ribs (R) is not necessarily limited to seven.

The lower drum 4 has a cylindrical shape having the same shape and size as the upper drum 2, and a space in which the ashes are stored is formed inside, and the upper drum 2 communicates with the movement passage 24 of the upper drum 2 at the upper portion thereof. An outlet 42 is formed to discharge the crushed ash, and the rib R is formed intensively in the middle portion of the lower drum 4. [

In addition, about seven ribs (R) formed on the lower drum (4) is also preferred, among which five ribs (R) are formed in the middle portion, and the other two ribs (R) on both ends of the lower drum (4) It is formed on the outer circumferential surface of each.

The rib (R) is formed to strengthen the rigidity to prevent deformation or damage of the upper and lower drum (4), the rib (R) is a ring-shaped plate welded to the outer peripheral surface of the upper and lower drum (4) It is formed to have a constant height and is formed continuously to form a ring or partially cut arc shape.

The ribs R preferably have a rectangular cross section or a trapezoid cross section.

Accordingly, by forming the rib R, the upper and lower drums 4 have durability against deformation.

That is, the circular rod, which is the grinding module 8 accommodated inside the upper and lower liners UA and DA in the upper and lower drums 2 and 4, may strike the upper and lower liners UA and DA during the vibration grinding process. When the impact is transmitted to the upper and lower drums 2 and 4, when a long time impact force is transmitted, a deformation may occur in which a specific portion of the upper and lower drums 2 and 4 is convexly protruded or concave. When left untreated, the warps of the upper and lower drums (2,4) are generated.

In order to prevent this, the present invention has a rigidity against the bending deformation by forming a ring-shaped rib (R) in the circumferential direction on the outer peripheral surface of the upper and lower drums (2,4).

On the other hand, the upper liner UA or the lower liner DA is usually coupled to the inside of the upper drum 2 or the lower drum 4, but is generally divided into three parts.

That is, three liner units are connected in series to form an upper liner UA. Likewise, three liner units are connected to form a lower liner DA.

Although the upper and lower liners UA and DA are formed to have a cylindrical shape by winding a metal plate, the upper and lower liners UA and DA have a problem in that they are weak in rigidity and are damaged or deformed by an impact.

In order to improve this, the upper and lower liners (UA, DA) of the present invention are manufactured in a cylindrical shape by casting and heat treatment to improve the hardness and wear resistance significantly.

The manufacturing method of the upper and lower liners (UA, DA) is divided into three embodiments as follows.

4 is a flow chart showing a process for producing a liner for a pulverizer according to the present invention.

As shown in Figure 4, the manufacturing method of the liner according to the present invention,

A step (S1) of injecting a casting material into a mold and curing it into a cylindrical mold;

Two steps (S2) of putting the steel material cast in the first step (S1) into the heat treatment furnace;

Three steps (S3) of heating the heat treatment furnace to 100 ° C. per hour to heat the temperature in the heat treatment furnace to 950-1050 ° C .;

Four steps to extract and cool after a certain time (S4)

.

The third step (S3) is maintained for 1 hour at 1050 ℃.

The cooling of the four step (S4) uses water cooling to be impregnated with water.

In Table 1, liner specimens (LM-001 to LM-007) manufactured according to heat treatment types are classified and shown.

Psalter
number Heat treatment temperature rising method Maintenance temperature and time Cooling method Remarks LM-001 none none none Casting condition LM-002 1000 ℃ to 200 ℃ / h 1000 ℃ for 1 hour Furnace cooling Annealing LM-003 1050 ° C at 200 ° C / h 1050 ℃ 1 hour Water cooling
(Quenching) LM-004 1050 ° C at 200 ° C / h 1050 ℃ 1 hour Air cooling Normalizing LM-005 1050 ° C at 200 ° C / h 1050 ℃ 1 hour Water cooling
(Quenching) The same specimen is to be final tempering. 200 ° C / h to 470 ° C 470 ℃ 5 hours Air cooling 850 ° C at 200 ° C / h 850 ℃ 4 hours Water cooling
(Quenching) LM-006 Charging in the temperature range of 1050 ℃ 1050 ℃ 1 hour Water cooling
(Quenching) Rapid heat treatment LM-007 100 ° C / h to 1050 ° C 1050 ℃ 1 hour Water cooling
(Quenching) LM-008 40 ℃ / h to 800 ℃ and 1050 ℃ to 100 ℃ / h 1050 ℃ 1 hour Water cooling
(Quenching) Stepwise heating treatment

The material of the liner is based on a mixture of carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), nickel (Ni) and iron (Fe). do.

Further, tungsten (W), vanadium (V), and molybdenum (Mo) can be further mixed with the basic component of the liner, and the liner specimen is summarized in Table 2.

Psalter
number Heat treatment temperature rising method Maintenance temperature and time Cooling method Remarks LMW 40 ° C / h to 800 ° C, and 100 ° C / h to 1050 ° C 1050 ℃ 1 hour Water cooling
(Quenching) Tungsten 0.5% alloy LMV Vanadium 0.5% alloy LMM Molybdenum 0.5% alloy

That is, when any one of tungsten (W), vanadium (V) and molybdenum (Mo) is further mixed, the third step (S3) is a 3-1 step of raising the temperature to 40 ° C. to 800 ° C. per hour, and It consists of a 3-2 process of raising temperature to 100 degreeC to 1050 degreeC.

Table 3 below is data for evaluating the mechanical properties of the liner specimens of Tables 1 and 2.

Psalm Number Tensile strength TS
(N / mm 2). Impact test
(Absorption energy, J) Hardness Remarks LM-001 211 4 HV 275 Casting condition LM-002 234 3.5 HV 297 Annealing status LM-003 747 62 HV 282 High Temperature Rate Quenching LM-004 274 19 HV 228 Normalizing LM-005 684 7 HV 305 Quenching & Tempering LM-006 493 37 HV 287 Rapid heating LM-007 683 46 HV 296 Low Temperature Rate Quenching LM-008 477 39 HV 252 Step Up Temperature Quenching LMW 759 102 HV 250 Tungsten alloy LMV 724 151 HV 244 Vanadium alloy LMM 717 145 HV 263 Molybdenum alloy

Referring to Table 3 above, it can be clearly seen that among the many liner specimens, specimen number LM-007 is the closest material to the mechanical properties sought in the present invention.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, It is obvious that the claims fall within the scope of the claims.

2: upper drum 4: lower drum
6: vibrator 8: grinding module
R: Rib UA, DA: Upper and Lower Liner

Claims (7)

delete delete delete In the manufacturing method of the liner mounted to the upper and lower drums constituting the grinder,
Injecting the casting material into the mold and then curing and casting the casting material;
Putting the steel cast in the first step into a heat treatment furnace;
Three steps of raising the temperature of the heat treatment furnace to 100 DEG C per hour and heating the temperature in the heat treatment furnace at 1050 DEG C for one hour;
After the three steps include extracting four steps to cool by water cooling method,
The casting material of the above-
In the grinder liner characterized in that carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), nickel (Ni), iron (Fe) is mixed Manufacturing method. The method of claim 4, wherein
In the above casting material
Tungsten (W), vanadium (V), molybdenum (Mo) any one of the selected method for producing a liner for a mill characterized in that the mixture is further mixed. 6. The method of claim 5,
In the case where any one of tungsten (W), vanadium (V), and molybdenum (Mo) is further mixed, the third process may be performed.
3-1 step of raising the temperature to 40 ℃ to 800 ℃ per hour,
Method for producing a grinder liner comprising a 3-2 step of raising the temperature to 100 ℃ to 1050 ℃ per hour. It is manufactured by the manufacturing method in any one of Claims 4-6, The grinder liner characterized by the above-mentioned.


KR1020100079118A 2010-08-17 2010-08-17 A crusher's liner and manufacturing method thereof KR100995371B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11343543A (en) * 1998-03-30 1999-12-14 Kobe Steel Ltd High toughness super-abrasion resistant cast steel and its production
KR100524587B1 (en) * 2005-04-19 2005-11-01 박명수 Fe-cr based alloy cast iron with excellent abrasion and impact resistance and manufacturing method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11343543A (en) * 1998-03-30 1999-12-14 Kobe Steel Ltd High toughness super-abrasion resistant cast steel and its production
KR100524587B1 (en) * 2005-04-19 2005-11-01 박명수 Fe-cr based alloy cast iron with excellent abrasion and impact resistance and manufacturing method thereof

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