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Method for measuring conductivity of inorganic binder sand

An inorganic binder and measurement method technology, applied in the direction of material resistance, etc., can solve the problems that cannot accurately reflect the effect of inorganic binder sand coating or film removal, large performance fluctuations, poor stability, etc., to reduce Troublesome, rigorous operation process, high stability effect

Inactive Publication Date: 2018-12-07
内蒙古仁创沙产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how much inorganic binder is added to the silica sand has a better coating effect, and how effective is the regeneration effect of the inorganic reclaimed sand? There is no effective detection method to evaluate its performance.
[0004] Existing methods for testing the performance of inorganic binder silica sand include testing acid consumption value, loss on ignition, and mud content. Evaluation of inorganic binder sand by these testing methods will have the disadvantages of large performance fluctuations and poor stability, and cannot be accurately determined. Reflects the coating effect or film removal effect of inorganic binder sand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present embodiment provides a method for measuring the conductivity of inorganic binder sand, comprising the following steps:

[0031] (1) Dissolving by shaking: Weigh the inorganic binder sand, add 5 times the weight of distilled water, and shake for 10 minutes at a speed of 120r / min to obtain a mixed solution;

[0032] (2) Centrifugation: Get the supernatant from the mixed solution obtained in step (1) and put it into a centrifuge tube, centrifuge for 30min at a speed of 3000r / min, take the supernatant in the centrifuge tube to form liquid to be tested;

[0033] (3) Detect the conductivity of the liquid to be tested obtained in step (2) with a conductivity meter.

Embodiment 2

[0035] The present embodiment provides a method for measuring the conductivity of inorganic binder sand, comprising the following steps:

[0036] (1) Shaking and dissolving: first crush the inorganic binder sand, weigh the crushed inorganic binder sand, add 5 times the weight of distilled water, and vibrate for 10 minutes at a speed of 120r / min in a water bath oscillator, get mixed solution;

[0037] (2) Centrifugal separation: use a pipette to pack the supernatant in the mixed solution obtained in step (1) into polyethylene centrifuge tubes, and each centrifuge tube is filled with 60ml supernatant, and the supernatant is filled at a speed of 3000r / min. Centrifuge for 30min, take the supernatant in the centrifuge tube to form the solution to be tested;

[0038] (3) Detect the conductivity of the liquid to be tested obtained in step (2) with a conductivity meter. The higher the conductivity, the more inorganic binder contained in the inorganic binder sand.

Embodiment 3

[0040] The present embodiment provides a method for measuring the conductivity of inorganic binder sand, comprising the following steps:

[0041] (1) Shaking and dissolving: first crush the inorganic binder sand to a particle size of 140 mesh, weigh 20 g of the broken inorganic binder sand, add 100 ml of distilled water and put it into a 250 ml Erlenmeyer flask, and put the Shake at a speed of 120r / min in a water bath shaker for 10min to obtain a mixed solution;

[0042] (2) Centrifugal separation: use a pipette to pack the supernatant in the mixed solution obtained in step (1) into polyethylene centrifuge tubes, and each centrifuge tube is filled with 60ml supernatant, and the supernatant is filled at a speed of 3000r / min. Centrifuge for 30min, take the supernatant in the centrifuge tube to form the solution to be tested;

[0043] (3) Use a conductivity meter with temperature compensation purchased from Mettler-Toledo International Trading Co., Ltd. to detect the conductivit...

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Abstract

The invention relates to a method for measuring the conductivity of inorganic binder sand. The method comprises the steps of adding distilled water into the inorganic binder sand, sequentially carrying out vibration and centrifugal separation, extracting supernate, and representing the amount of an inorganic binder in the inorganic binder sand by virtue of a method for detecting the conductivity of the supernate by virtue of a conductivity instrument. The method has the beneficial effects that the operation process is strict, simple and convenient; the stability is high; the numerical value ishigh, the repeatability is high, and meanwhile, the troubles in the preparation and use of a solution are reduced; and a chemical reagent is not used in the whole measurement process, and only wateris adopted, so that the method is relatively environment-friendly and efficient, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of purification, and in particular relates to a method for measuring the conductivity of inorganic binder sand. Background technique [0002] Inorganic binders, which are different from organic binders, have high bonding strength and are used in the preparation of complex cylinder sand cores. There is no harmful smoke emission during the casting process. They are mainly used in the aluminum casting process. [0003] With the requirements of environmental protection and the development trend of the foundry industry, the application proportion of inorganic binder sand in the field of gravity casting is increasing. The inorganic binder is mainly composed of inorganic salt colloid, and the sand core shape prepared with special inorganic oxides does not emit smoke during the casting process. Compared with organic resin sand, it has obvious benefits to the environment and human health. However, how much inorganic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/06
CPCG01N27/06
Inventor 冯俊龙尹海军李卓情李序华
Owner 内蒙古仁创沙产业有限公司
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