CN203320132U

CN203320132U - Pickler

Info

Publication number: CN203320132U
Application number: CN2013203062693U
Authority: CN
Inventors: 田正军
Original assignee: TIANJIN SHUNTONG STRIP STEEL Co Ltd
Current assignee: TIANJIN SHUNTONG STRIP STEEL Co Ltd
Priority date: 2013-05-30
Filing date: 2013-05-30
Publication date: 2013-12-04
Anticipated expiration: 2023-05-30

Abstract

The utility model aims at solving the technical problem of providing a relatively efficient pickler. According to the technical scheme, the pickler is characterized by comprising an upper part structure, an oil removing room, a hot water sprinkling chamber, a first high pressure water sprinkling chamber, a first acid pickling room, a second high pressure water sprinkling chamber, a second acid pickling room, a third high pressure water sprinkling chamber and a lower part structure that are in sequential connection. The pickler has the beneficial effect that a stainless steel normal temperature rapid acid pickling technology is successfully researched by adopting a two-step acid pickling overall treatment technology through the pickler. According to the technology, thick oxide skin on the surface of the stainless steel can be rapidly removed at normal temperature, especially black skins and inclusions at the welded junction can be removed effectively, and the surface of the stainless steel subjected to acid pickling is clean and bright, is not easy to fade and does not turn yellow.

Description

Pickler

Technical field

The utility model relates to iron and steel manufacturing technology field, relates in particular to a kind of pickler.

Background technology

With steel, it is a kind of narrow and long steel plate that all kinds of Metallurgical Enterprise are produced for the needs that adapt to different each metalloids of industrial sector suitability for industrialized production or engineering goods.The band steel claims again steel band, be width in 1300mm, length is slightly different according to the size of every volume.

Band steel general rolling supply, have that dimensional precision is high, surface quality good, be convenient to processing, save the advantage such as material.Identical with steel plate, the band steel is divided into ordinary band steel and quality strip steel two classes by material used; Divide two kinds of hot rolled strip, cold rolled strips by working method.

The band steel is widely used in the production Welded Steel Pipe, makes the blank of roll formed shape, manufactures cycle frame, wheel rim, clip, packing ring, spring piece, saw blade, hardware and blade etc.

The process for producing cold rolled strip steel flow process is generally: pickling → rolling → technological lubrication → annealing → smooth → shearing → packing.

Pickling refers to a kind of method on clean metal surface.Usually together with pre-film (pre-passiviting treatment), carry out.

Generally product is immersed to the aqueous solution of sulfuric acid etc., to remove the films such as oxide compound of metallic surface.Pre-treatment or the intermediate treatment of the techniques such as plating, enamel, rolling.

Utilize acid solution to remove oxide skin on steel surface and the method for corrosion thing is called pickling.The oxide compound of the iron such as oxide skin, iron rust (Fe3O4, Fe2O3, FeO etc.) and acid solution generation chemical reaction, form salt and be dissolved in acid solution and be removed.Spent pickling acid has sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, chromic acid, hydrofluoric acid and mixing acid etc.The most frequently used is sulfuric acid and hydrochloric acid.Acid cleaning process mainly contains the dip pickling method, sprays acid wash and sour cream rust removal method.General multiplex dip pickling method, can adopt gunite in production in enormous quantities.Steel-iron components is pickling in 10%～20% (volume) sulphuric acid soln generally, and temperature is 40 ℃.In solution, iron-holder surpasses 80g/L, when ferrous sulfate surpasses 215g/L, should change pickle solution.Under normal temperature, with the hydrochloric acid soln of 20%～80% (volume), iron and steel is carried out to pickling, be difficult for occurring excessive erosion and Hydrogen Brittleness Phenomena.Because acid is very large to the corrosion of metal effect, need to add inhibiter.After cleaning, metallic surface becomes silvery white, and passive surface, improve the stainless steel resistance to corrosion simultaneously.Adopt the aqueous sulfuric acid that concentration is 5%～20%, the technique of removing workpiece surface oxide skin and adhesion salt is called the sulfuric acid washing method.The industrial vitriol oil of selling on the market containing H2SO475%～97% (massfraction), also can be selected brown industrial sulphuric acid solution usually, and it is containing H2SO475%～78% (massfraction).

In order to eliminate the diatomite support surface adsorption, reduce the chromatographic peak hangover, carrier needs before use to carry out pickling or alkali cleaning is processed.Pickling is 6mol/L hydrochloric acid digestion 2h or concentrated hydrochloric acid heating digestion 30min for carrier, filters, and washes with water to neutrality, dries.Pickling can be removed the impurity such as lip-deep iron, aluminium, calcium, magnesium, but can not remove the silanol base.The pickling carrier is suitable for analyzing acid sample.

Pickling acid commonly used is: hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid.Must add restrainer when pickling, prevent that acid is to corrosion of metal.

The acid cleaning process that present stage adopts is removed the stainless steel surface heavy scale, and use temperature is high, and pickling time is long, causes tooling cost high; And the normal temperature descaling technique is effective to removing thin oxide skin, undesirable to the heavy scale effect, particularly the black slag of weld is basically except not falling.

The utility model content

The technical problems to be solved in the utility model is: a kind of pickler more efficiently is provided.

The technical solution of the utility model is as follows: a kind of pickler, it is characterized in that: comprise successively upper structure of connecting, except grease chamber, heat water-spraying chamber, the first high pressure water spray chamber, the first pickling chamber, the second high pressure water spray chamber, the second pickling chamber, third high setting-out spray chamber, lower structure.

Further, also comprise process furnace, described process furnace is connected with the heat water-spraying chamber.

Further, also comprise pressurized compartment, described pressurized compartment the first high-pressure spraying chamber, the second high-pressure spraying chamber and third high respectively presses spray chamber to be connected.

The main purpose of the first pickling chamber is to remove casting skin and inclusion and the partial oxidation skin of weld and weld seam, and through optimizing screening, definite technological specification is as follows:

Hydrochloric acid 300mL/L, phosphoric acid 60mL/L, hydrogen peroxide 120mL/L, stablizer 80mL/L, tensio-active agent 2mL/L.

The second pickling chamber

The first pickling chamber can not eliminate oxide film after processing fully, surface attachment one deck grey film, and gloss is poor, must remove surperficial grey film through the second pickling chamber, makes it reach approximate minute surface light, through optimizing the screening experiment checking, adopts following technological specification:

Hydrofluoric acid 300mL/L, sulfuric acid 200mL/L, hydrogen peroxide 240mL/L, hydrogen peroxide stabilizer 80mL/L, restrainer 0.5g/L, tensio-active agent 2mL/L.

The beneficial effects of the utility model are: adopt two step pickling comprehensive treatment techniques by the utility model, studied successfully the quick acid cleaning process of stainless steel normal temperature.Can remove fast the stainless steel surface heavy scale under this technique normal temperature, particularly effective to weld casting skin and inclusion removal, the clean light in cleanup acid treatment rear surface, be difficult for loss of gloss and fade, not yellowing.

The accompanying drawing explanation

Fig. 1 is structured flowchart of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is made to brief description.

As shown in Figure 1, a kind of pickler, it is characterized in that: comprise successively upper structure of connecting, except grease chamber, heat water-spraying chamber, the first high pressure water spray chamber, the first pickling chamber, the second high pressure water spray chamber, the second pickling chamber, third high setting-out spray chamber, lower structure.Also comprise process furnace and pressurized compartment, described process furnace is connected with the heat water-spraying chamber, and described pressurized compartment the first high-pressure spraying chamber, the second high-pressure spraying chamber and third high respectively presses spray chamber to be connected.

The second pickling chamber

Above an embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variations of doing according to the utility model application range and improvement etc., within all should still belonging to patent covering scope of the present utility model.

Claims

1. a pickler is characterized in that: comprise upper structure of connecting successively, except grease chamber, heat water-spraying chamber, the first high pressure water spray chamber, the first pickling chamber, the second high pressure water spray chamber, the second pickling chamber, third high setting-out spray chamber, lower structure.

2. pickler according to claim 1, it is characterized in that: also comprise process furnace, described process furnace is connected with the heat water-spraying chamber.

3. pickler according to claim 1, it is characterized in that: also comprise pressurized compartment, described pressurized compartment the first high-pressure spraying chamber, the second high-pressure spraying chamber and third high respectively presses spray chamber to be connected.