US4023022A
Expired / Lapsed
US
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System for automatically and continuously measuring zinc and sulfuric acid concentration in circulating electrolyte
Assignee: Mitsui Kinzoku Co Ltd
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Filing: 1975-07-22
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Granted: 1977-05-10
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Expires: 1995-07-22
Abstract
Abstract A system for automatically and continuously measuring the zinc and sulfuric acid concentration in an electrolyte circulating through electrolysis cells of a hydrometallurgical zinc production system, in which an inductive solution analyzer capable of continuously detecting the conductivity of the circulating electrolyte is used with a measuring cell disposed in the path of a continuous stream of the circulating electrolyte. The measuring cell comprises a defoaming chamber, a measuring chamber and an overflow chamber, and the continuous stream of the electrolyte flows through the measuring chamber as a downward stream so that bubbles can be removed and precipitation of slurry can be prevented. The signal representative of the detected conductivity is applied to an electronic computer which computes automatically the zinc and sulfuric acid concentration according to predetermined calculation formulas.
Inventors
- 👤 Satoshi Mukae
- 👤 Kiyosi Yokokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:35
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/023; C; C25; C25C; C25C7/00; C25C7/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
177 words
A system for automatically and continuously measuring the zinc and sulfuric acid concentration in an electrolyte circulating through an electrolysis cell in a hydromentallurgical zinc production process, said measuring system comprising an inductive solution analyzer having a transmitter and capable of continuously detecting the conductivity of the circulating electrolyte, and a measuring cell disposed in the path of a continuous stream of the circulating electrolyte, said measuring cell comprising a defoaming chamber, a measuring chamber and an overflow chamber defined therein by a partition wall, said transmitter of said inductive solution analyzer being disposed within said measuring chamber, an overflow port formed in an upper portion of said partition wall and a first communication port bored in a middle portion of said partition wall to provide communication means between said defoaming chamber and said measuring chamber, and a second communicating port bored in a lower portion of said partition wall to provide communication means between said measuring chamber and said overflow chamber, whereby the circulating electrolyte can always flow through said measuring cell as a downward stream.
Claim 2
Independent Claim
177 words
A system for automatically and continuously measuring the zinc and sulfuric acid concentration in an electrolyte circulating through an electrolysis cell in a hydromentallurgical zinc production process, said measuring system comprising an inductive solution analyzer having a transmitter and capable of continuously detecting the conductivity of the circulating electrolyte, and a measuring cell disposed in the path of a continuous stream of the circulating electrolyte, said measuring cell comprising a defoaming chamber, a measuring chamber and an overflow chamber defined therein by a partition wall, said transmitter of said inductive solution analyzer being disposed within said measuring chamber, an overflow port formed in an upper portion of said partition wall and a first communication port bored in a middle portion of said partition wall to provide communication means between said defoaming chamber and said measuring chamber, and a second communicating port bored in a lower portion of said partition wall to provide communication means between said measuring chamber and said overflow chamber, whereby the circulating electrolyte can always flow through said measuring cell as a downward stream.
Claim 3
Dependent Claim
134 words
An automatic and continuous measuring system as claimed in claim 1, wherein the signal representative of the conductivity detected continuously by said inductive solution analyzer is applied through an analog-digital converter to an electronic computer, and said electronic computer computes automatically the zinc concentration and sulfuric acid concentration in the circulating eletrolyte on the basis of predetermined approximate expressions given by x = A .sup.. δ + B .sup.. [t - Zn] + C y = D .sup.. δ + E .sup.. [t - An] + F where x is the zinc concentration in the circulating electrolyte, y is the sulfuric acid concentration in the circulating electrolyte, δ is the detected conductivity of the circulating electrolyte, A to F are constants, and [t - Zn] is the total zinc concentration in the circulating electrolyte.
Claim 4
Dependent Claim
39 words
An automatic and continuous measuring system as claimed in claim 2, wherein the constants in the approximate expressions are respectively A = -277.3, B = 0.108, C = 130.2, D = 415.0, E = 1.350, and F = -197.0.
Claim 5
Dependent Claim
39 words
An automatic and continuous measuring system as claimed in claim 2, wherein the constants in the approximate expressions are respectively A = -269.36, B = 0.194, C = 114.39, D = 439.89, E = 0.730, and F = -100.71.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |