CN1219915C

CN1219915C - Brush roll cleaning process in stainless steel hot-rolled sheet acid cleaning process and brush roll therefor

Info

Publication number: CN1219915C
Application number: CN 200310109666
Authority: CN
Inventors: 秦广谦
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-17
Filing date: 2003-11-17
Publication date: 2005-09-21
Anticipated expiration: 2023-11-17
Also published as: CN1544700A

Abstract

The present invention provides a brush roll cleaning method in the pickling process of a stainless steel hot rolled plate and brush rolls, which is an improvement of the existing process techniques such as shot blasting treatment, sulfuric acid pickling, brush roll cleaning for the first time, pickling of mixed acid of hydrofluoric acid and nitric acid, the brush roll cleaning for the second time, namely the brush roll cleaning at an outlet to the stainless steel hot rolled plate, etc. The present invention is characterized in that in the brush roll cleaning for the first time after the sulfuric acid pickling, a nylon yarn brush roll whose diameter is from 1.2 to 1.5mm is used for strong brushing, wherein the nylon yarn brush roll contains silicon carbide abrasives whose mesh number is from 80 to 150; in the brush roll cleaning for the second time after the pickling of mixed acid, a nylon yarn brush roll whose diameter is about 0.5mm is used for soft brushing, wherein the nylon yarn brush roll contains micropowder silicon carbide abrasives. The present invention has the advantages of clean removal of ferric oxide scaly residues on the surface of the plate, no damage and scratch of passivating films, high production efficiency, etc., the service life of the brush rolls is prolonged, and times for replacing rolls are reduced.

Description

Brush roll purging method and brush roll in a kind of stainless steel hot-rolling plate acid cleaning process

Technical field

The invention belongs to the processing method of stainless steel plate in producing, relate to and a kind ofly produce brush roll purging method and the brush roll in the stainless steel hot-rolling plate acid cleaning process in the acid cleaning process at stainless steel plate.

Background technology

At present, in the stainless steel plate production technique, particularly in the production technique of stainless steel hot-rolling plate pickling, from hot-rolled stainless coil of strip raw material → clean through High Temperature Furnaces Heating Apparatus annealing → shot-blasting machine ball blast pre-treatment → sulfuric acid washing → first time brush roll cleaning → hydrofluoric acid, the pickling of nitric acid nitration mixture → second time brush roll, promptly stainless steel hot-rolling plate exit brush roll clean → is supplied raw materials for cold rolling line.Brush roll in this stainless steel hot-rolling plate acid cleaning process cleans and directly has influence on the quality product that post-order process is produced the stainless steel cold drawing, whether remove totally as the scale oxide residue of hot plate behind the sulfuric acid washing, and the passive film that hot plate surface forms after the nitration mixture pickling is not damaged and no marking etc.In the production technique of cold rolled stainless steel sheet, the brush roll of hot plate acid cleaning process section cleans show extremely important like this.

The scrubbing unit brush roll that cleans commonly used has: (1) pure nylon wire brush roll; (2) contain and be regardless of the silicon carbide abrasive nylon wire brush roll that weight is scrubbed; (3) Wire brush roller.Existing each cold rolled stainless steel sheet factory adopts the brush roll purging method in the stainless steel hot-rolling plate acid cleaning process.Common has following four kinds: (1) pure nylon wire brush roll cleans, and all uses pure nylon wire brush roll with brush roll cleaning for the second time for the first time; (2) contain and be regardless of the silicon carbide abrasive nylon wire brush roll that weight scrubs and clean; (3) Wire brush roller cleans, and all uses Wire brush roller with brush roll cleaning for the second time for the first time; (4) adopt silicon carbide abrasive nylon wire brush roll to clean for the first time, adopt pure nylon wire brush roll to clean for the second time;

Brush roll purging method and brush roll in the above-mentioned stainless steel hot-rolling plate acid cleaning process.The main shortcoming and defect that exists:

(1) pure nylon wire brush roll cleans; The scale oxide residue on hot plate surface does not clean up behind sulfuric acid washing, and brush roll is shorter work-ing life.

(2) containing the nylon wire brush roll that is regardless of the silicon carbide abrasive that weight scrubs cleans; The passive film that the hot plate surface forms after the nitration mixture pickling easily is struck off and is damaged, and easily cut is arranged.

(3) Wire brush roller cleans; Both the scale oxide residue to hot plate surface behind sulfuric acid washing was difficult to remove totally, and the passive film that the surface of hot plate after the nitration mixture pickling is formed is struck off easily and is damaged again, and easily cut is arranged.

(4) adopt silicon carbide abrasive nylon wire brush roll to clean for the first time, adopt pure nylon wire brush roll to clean for the second time; The disadvantage of pure nylon wire brush roll is to use the life-span shorter.

Summary of the invention

Pickling, the cleaning that the present invention is directed to hot plate in the above cold-rolled steel sheet production technique improved and is perfect, proposes to use the brush roll of different diameter brush silk and abrasive grain degree heavily to brush the method for cleaning with light brush of cleaning after sulfuric acid washing section and hydrofluoric acid, nitric acid nitration mixture pickling section.And provide light brush wear-resistant, that work-ing life is long to clean brush roll.

Technical scheme of the present invention is achieved in that

Brush roll purging method in a kind of stainless steel hot-rolling plate acid cleaning process comprises: sulfuric acid washing → first time brush roll cleaning → hydrofluoric acid, nitric acid nitration mixture pickling → second time brush roll cleans, and promptly stainless steel hot-rolling plate exit brush roll cleans; Its characteristics are: described first time, brush roll cleaned that to adopt diameter be 1.2-1.5mm, and the nylon wire brush roll that contains silicon carbide abrasive and be 80-100 order number is heavily brushed cleaning; It is about 0.5mm that diameter is adopted in the described brush roll cleaning second time, and the nylon wire brush roll that contains the micro mist silicon carbide abrasive is gently brushed cleaning.

Brush roll purging method in above-described a kind of stainless steel hot-rolling plate acid cleaning process, its characteristics are: increase sulfuric acid washing and brush roll cleaning after the described first time, brush roll cleaned again, wherein said brush roll cleans and adopts diameter is 1-1.2mm, and the nylon wire brush roll that contains silicon carbide abrasive and be 120-150 order number carries out time heavily that brush cleans.

The brush roll that light brush cleans in the brush roll purging method in the above a kind of stainless steel hot-rolling plate acid cleaning process is the nylon wire brush roll; Its characteristics are: nylon brush thread is that diameter is about 0.5mm, contains the micro mist silicon carbide abrasive.

Brush roll purging method and brush roll in the stainless steel hot-rolling plate acid cleaning process provided by the invention are compared with background technology, at first, heavily brush cleaning has been provided in the raw material hot-rolled steel sheet pickling line technology that provides for cold drawing has cleaned two stage purging methods, had following technical progress and evident characteristic with light brush:

1, because silicon carbide abrasive granularity in the brush silk on the brush roll is strengthened, the diameter overstriking has strengthened the dynamics that brush roll is scrubbed the stainless steel hot-rolling plate, behind sulfuric acid washing, do heavily brush cleaning or increase inferior heavily brush to clean, cleaning up, also form passive film after the nitration mixture pickling and lay a solid foundation for stainless steel plate enters attached to scale oxide residue and acid solution on the stainless steel hot-rolling plate.

2, adopt the brush roll of the nylon brush thread that contains micro mist silicon carbide, replace pure nylon wire or Wire brush roller, clean as light brush, both stainless steel hot-rolled sheet outlet brush roll cleans; So both do not fall the passive film that surface of steel plate forms, and can not produce plate face cut again, improved the cleaning quality of stainless steel hot-rolling plate.Brush silk wear resistance is good, and brush roll prolongs work-ing life.

Description of drawings

Fig. 1 is the brush roll purging method schema in a kind of stainless steel hot-rolling plate acid cleaning process;

Fig. 2 is a kind of method flow diagram of scrubbing that contains in the stainless steel hot-rolling plate acid cleaning process that twice sulfuric acid washing and brush roll clean.

Among the figure: 1, sulfuric acid washing groove; 2, nitration mixture pickling tank; 3, clear water spray equipment; 4, heavy brush roll; 5, light brush roll.

Embodiment

Shown in Figure 1, the brush roll purging method in a kind of stainless steel hot-rolling plate acid cleaning process comprises:

Shot Blasting; Remove iron scale, pre-treatment.

Sulfuric acid washing; The ball blast clean scale oxide that is untreated is peeled off.

Brush roll cleans for the first time; Promptly being called heavily, brush cleans; It uses diameter to be 1.2-1.5mm, and containing silicon carbide abrasive is the nylon wire brush roll cleaning of 80-100 order number.

Ammonia fluoric acid+nitric acid nitration mixture pickling; Passivation Treatment.

Brush roll cleans for the second time, and promptly stainless steel hot-rolling plate exit brush roll cleans, and is called light brush again and cleans, and about it used diameter as 0.5mm, the nylon wire brush roll that contains the micro mist silicon carbide abrasive cleaned.

Plate after cleaning send cold-rolling mill rolling, produces cold rolled sheet through the cold drawing pickling line again.

Sulfuric acid tank and nitration mixture groove used in present method are longer.

Shown in Figure 2, a kind of brush roll purging method that contains in the stainless steel hot-rolling plate acid cleaning process that twice sulfuric acid washing and brush roll clean, it is in the brush roll purging method in above stainless steel hot-rolling plate acid cleaning process shown in Figure 1, through the sulfuric acid washing → brush roll cleaning first time, after promptly heavily brush cleans, increase sulfuric acid washing and brush roll again and clean.It is that to adopt diameter be 1-1.2 that current brush roll cleans, contain silicon carbide abrasive and be the nylon wire brush roll of 120-150 order number carries out time heavily brush clean.

Sulfuric acid tank and nitration mixture groove used in present method are shorter.

The heavy brush roll that cleans of brush, inferior heavily brush, light brush in the brush roll purging method in the above a kind of stainless steel hot-rolling plate acid cleaning process, can be chip, the various forms of brush rolls that the stainless steel hot-rolling plate cleans that are used for such as spiral, (the preferred 0.5mm of brush filament diameter) contains the micro mist silicon carbide abrasive about the nylon brush thread diameter 0.5mm of light brush brush roll.

Claims

1, the brush roll purging method in a kind of stainless steel hot-rolling plate acid cleaning process comprises: sulfuric acid washing → first time brush roll cleaning → hydrofluoric acid, nitric acid nitration mixture pickling → second time brush roll cleans, and promptly stainless steel hot-rolling plate exit brush roll cleans; It is characterized in that: described first time, brush roll cleaned that to adopt diameter be 1.2-1.5mm, and the nylon wire brush roll that contains silicon carbide abrasive and be 80-100 order number is heavily brushed cleaning; It is about 0.5mm that diameter is adopted in the described brush roll cleaning second time, and the nylon wire brush roll that contains the micro mist silicon carbide abrasive is gently brushed cleaning.

2, the brush roll purging method in a kind of stainless steel hot-rolling plate acid cleaning process according to claim 1, it is characterized in that: after the described first time, brush roll cleaned, increase sulfuric acid washing and brush roll cleaning again, wherein said brush roll cleans and adopts diameter is 1-1.2mm, and the nylon wire brush roll that contains silicon carbide abrasive and be 120-150 order number carries out time heavily that brush cleans.