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A kind of acid adding amount control method for pickling production of hot-rolled titanium plate

A control method and technology for adding acid, which are applied in non-electric variable control, control/regulation systems, and simultaneous control of multiple variables, etc., can solve the problems of under-pickling, over-pickling of hot-rolled titanium plates, etc., and increase production. , Guarantee quality, improve the effect of precision

Active Publication Date: 2022-07-19
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In view of this, the present invention provides a method for controlling the amount of acid added for pickling production of hot-rolled titanium plates. By precisely controlling the amount of acid added and the amount of water added, the accuracy of the initial acid solution is improved to solve the problems in the prior art. , due to the reaction itself, temperature control and equipment limitations, the hot-rolled titanium plate is prone to over-pickling or under-pickling problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Before production, the surface area of ​​the initial hot-rolled titanium plate was measured. The surface area of ​​the initial hot-rolled titanium plate was 1150 square meters. The initial acid solution was configured according to the surface area of ​​the initial hot-rolled titanium plate. The volume of the initial acid solution was 40,000 liters. The content is 95g / L, and the content of hydrofluoric acid is 15g / L; the initial hot-rolled titanium plate is acid washed with initial acid solution.

[0041] During production, the initial acid solution that has been pickled with the initial hot-rolled titanium plate is used to continue to pickle the new hot-rolled titanium plate. For acid addition operation, the amount of acid added is 400L / h of 65% nitric acid and 600L / h of 55% hydrofluoric acid; after adding acid, the temperature of the initial acid solution rises to 52°C, and 600L of industrial water is added. / h to bring the temperature of the initial acid solution down...

Embodiment 2

[0046] Before production, the surface area of ​​the initial hot-rolled titanium plate was measured. The surface area of ​​the initial hot-rolled titanium plate was 1140 square meters. The initial acid solution was configured according to the surface area of ​​the initial hot-rolled titanium plate. The volume of the initial acid solution was 40,000 liters. The content is 92g / L, and the content of hydrofluoric acid is 16g / L; the initial hot-rolled titanium plate is acid washed with initial acid solution.

[0047] During production, the initial acid solution of the initial hot-rolled titanium plate was used to continue to pickle the new hot-rolled titanium plate. The processing capacity of the new hot-rolled titanium plate was 1050 m2 / h. For acid addition operation, the amount of acid added is 400L / h of 65% nitric acid and 600L / h of 55% hydrofluoric acid; after adding acid, the temperature of the initial acid solution rises to 52°C, and 600L of industrial water is added. / h to br...

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Abstract

The invention discloses a method for controlling the amount of acid added for pickling production of hot-rolled titanium plates, and relates to the technical field of pickling of hot-rolled titanium plates. The deviation correction step, wherein, adding acid and water during production also includes, using the initial acid solution to pickle the new hot-rolled titanium plate, and adding acid to the initial acid solution at the same time; measuring the temperature of the initial acid solution, according to the new hot-rolled titanium plate. Add industrial water to the treatment amount; observe the pickling quality of the new hot-rolled titanium plate, and adjust the amount of acid added and the amount of industrial water added according to the pickling quality; the invention accurately controls the amount of acid added and the amount of water added to improve The accuracy of the initial acid solution solves the problem that the hot-rolled titanium plate is prone to over-pickling or under-pickling due to the reaction itself, temperature control and equipment limitations in the prior art.

Description

technical field [0001] The invention relates to the technical field of pickling of hot-rolled titanium plates, in particular to a method for controlling the amount of acid added for the production of pickling of hot-rolled titanium plates. Background technique [0002] The stainless steel thermal annealing and pickling line mainly produces stainless steel hot rolled black coil. In recent years, with the rise of the domestic titanium plate processing industry, stainless steel thermal annealing and pickling lines have begun to produce titanium plate black rolls, but titanium is an active metal, and it reacts violently with various media in the production line, especially with mixed acid (HNO). 3 +HF) reacts violently and continuously consumes H in the mixed acid + ions, resulting in a low concentration of relevant reactive ions in the mixed acid when the hot-rolled titanium plate is produced on the production line, and the acid pickling quality of the titanium plate is poor, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/10G05D27/02
Inventor 申德潘吉祥姜利庭
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD