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Method for quickly testing pH value of light calcium slurry after efflorescence process

A PH value and slurry technology, which is applied in the field of light calcium slurry to quickly test the PH value after the alkali return process, can solve the problems of long duration, lack of timeliness, lag, etc., and achieve the effect that is easy to master

Inactive Publication Date: 2019-11-05
常熟美特钙业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has considerable guiding significance, it lasts too long, and the information provided is too late compared to production, lacks timeliness, and is difficult to help production provide timely guidance

Method used

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Examples

Experimental program
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Embodiment 1

[0013] A method for quickly testing the pH value of light calcium slurry after the alkali-returning process, comprising the following steps:

[0014] Step 1. Take 500ml of light calcium slurry to be evaluated, and after cooling to room temperature, measure its pH value;

[0015] Step 2. Put the above-mentioned light calcium slurry into a magnetic heating stirrer with a constant temperature function, and raise the temperature to 65 o C; keep warm for 7 hours;

[0016] Step 3, stop heating, cool to room temperature, and measure the pH value.

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PUM

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Abstract

The invention discloses a method for quickly testing pH value of light calcium slurry after an efflorescence process. The method comprises the following steps: firstly, taking to-be-evaluated light calcium slurry, cooling to room temperature, and then determining pH value of the to-be-evaluated light calcium slurry; secondly, putting the light calcium slurry into a magnetic heated stirrer with a constant temperature function, and increasing temperature to 65-80 DEG C; and performing heat preservation for 6-8 hours; and thirdly, stopping heating, cooling to room temperature, and determining pHvalue. The method disclosed by the invention and used for quickly testing the pH value of the light calcium slurry after the efflorescence process adopts a high temperature heating method, can providea pH test result similar to one week in a natural state within short time after treatment and has a realistic guiding significance on production control.

Description

technical field [0001] The invention relates to a method for quickly testing the pH value of a light calcium slurry after a back-to-alkali process. Background technique [0002] Calcium carbonate for papermaking is generally produced by the carbonation reaction of milk of lime and CO2. The final product is in the state of slurry, and the pH is generally neutral. In the process of being used, it will generally be left for a period of time, because the carbonation is not thorough enough, and the pH will gradually rise, which is called back to alkali in the industry. The wet part of the papermaking system has certain requirements for pH, so the evaluation and control line of pH return to alkali are very important. [0003] Under normal circumstances, the evaluation of the degree of alkalinity is carried out by using the common test method on the pH sample for one week, and the pH value on the seventh day under natural conditions is often used as the basis for judgment. Althou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/34
CPCG01N33/343
Inventor 赵家文
Owner 常熟美特钙业有限公司
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