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Continuous pickling method of titanium bands

A pickling and titanium strip technology, which is applied in the field of chemical surface treatment of non-ferrous metal materials, can solve the problems of poor controllability of pickling quality, unfavorable pickling dissolution rate, low yield of titanium strip, etc., to ensure the pickling surface Quality, reduce pickling dissolution rate, uniform metal color

Inactive Publication Date: 2014-09-17
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two main pickling processes for pure titanium strips in China, one is pre-pickling with HCl+HF and HNO 3 +HF for final pickling, this pickling method will not produce nitrogen oxides during pre-pickling, but the mixed acid is a strong acid, the pickling speed is faster, and it is easy to cause overwashing; the other is to use HNO 3 + HF pickling once, for example, monomixed acid HNO is used in the patent application CN102851674A 3 +HF first-level pickling process, the pickling cycle is short, but the acid concentration is too high, which is not conducive to the control of pickling dissolution rate, the controllability of pickling quality is poor, and the yield of titanium strip is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This embodiment is used to illustrate the continuous pickling method of the titanium strip of the present invention.

[0040] The annealed and shot-peened titanium strip is continuously passed through the pre-cleaning, primary pickling, intermediate cleaning, secondary pickling, final cleaning and drying process sections at a speed of 6m / min. The specific steps are as follows:

[0041] (1) Pre-cleaning treatment: introduce the annealed and shot-peened titanium strip into the pre-cleaning tank, spray desalted water on the upper and lower surfaces of the titanium strip through the nozzle on the spray beam device, and take out the metal powder and shot blasting on the upper and lower surfaces of the titanium strip The steel shot is cleaned, and the water on the surface of the titanium strip is squeezed out with a squeeze roller;

[0042] (2) One-time pickling treatment: guide the titanium belt out of the pre-cleaning tank into the first acid tank, and the titanium belt is ...

Embodiment 2

[0049] This embodiment is used to illustrate the continuous pickling method of the titanium strip of the present invention.

[0050] The annealed and shot-peened titanium strip is continuously passed through the pre-cleaning, primary pickling, intermediate cleaning, secondary pickling, final cleaning and drying process sections at a speed of 2m / min. The specific steps are as follows:

[0051] (1) Pre-cleaning treatment: introduce the annealed and shot-peened titanium strip into the pre-cleaning tank, spray desalted water on the upper and lower surfaces of the titanium strip through the nozzle on the spray beam device, and take out the metal powder and shot blasting on the upper and lower surfaces of the titanium strip The steel shot is cleaned, and the water on the surface of the titanium strip is squeezed out with a squeeze roller;

[0052] (2) One-time pickling treatment: guide the titanium belt out of the pre-cleaning tank into the first acid tank, and the titanium belt is ...

Embodiment 3

[0059] This embodiment is used to illustrate the continuous pickling method of the titanium strip of the present invention.

[0060] The annealed and shot-peened titanium strip is continuously passed through the pre-cleaning, primary pickling, intermediate cleaning, secondary pickling, final cleaning and drying process sections at a speed of 4m / min. The specific steps are as follows:

[0061] (1) Pre-cleaning treatment: introduce the annealed and shot-peened titanium strip into the pre-cleaning tank, spray desalted water on the upper and lower surfaces of the titanium strip through the nozzle on the spray beam device, and take out the metal powder and shot blasting on the upper and lower surfaces of the titanium strip The steel shot is cleaned, and the water on the surface of the titanium strip is squeezed out with a squeeze roller;

[0062] (2) One-time pickling treatment: guide the titanium belt out of the pre-cleaning tank into the first acid tank, and the titanium belt is ...

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Abstract

The invention discloses a continuous pickling method of titanium bands. The method comprises the following steps: pre-cleaning titanium bands obtained after annealing shot blasting, carrying out primary pickling treatment, carrying out intermediate cleaning treatment, carrying out secondary pickling treatment, carrying out final cleaning treatment, and drying, wherein mixed acid solutions used in the primary pickling treatment and the secondary pickling treatment are nitric acid and hydrofluoric acid mixed acid solutions, and the concentrations of nitric acid and hydrofluoric acid in the mixed acid solution used in the primary pickling treatment are different from the concentrations of nitric acid and hydrofluoric acid in the mixed acid solution used in the secondary pickling treatment. The method can improve and control pickling surface quality of the titanium bands, controls the pickling solution loss rate in real time, and realizes the win-win purpose of the pickling surface quality and the rolling yield of the titanium bands.

Description

technical field [0001] The invention relates to a method for chemically treating the surface of nonferrous metal materials, in particular to a continuous pickling method for titanium strips. Background technique [0002] Pickling is a means of chemical surface treatment of non-ferrous metal materials. Its principle is to remove scale and rust on the metal surface through acid solution, and it is a method of cleaning the metal surface. [0003] As a non-ferrous metal, titanium will produce a layer of oxide scale on its surface after thermal processing. The pickling of titanium belt is to dissolve the surface oxide scale with mixed acid solution, and at the same time carry out passivation treatment to prevent the dissolution from accelerating and maintain pickling. The surface of the metal is silver-white. Since TiO is easily formed during thermal processing of titanium 2 Mainly oxide scale, so its pickling method is different from that of steel, but similar to that of stain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/10C23G3/02
Inventor 肖聪李军彭琳郭华许震徐信
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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