Xinghui New Materials is a professional enterprise engaged in the research and development, production, and sales of anti-corrosion carbon bricks and impregnated anti-corrosion carbon bricks. We are committed to providing high-quality, acid resistant, and anti-corrosion graphite carbon bricks for chemical plants to ensure the smooth progress of industrial production.

There are several main methods for evaluating the quality and effectiveness of carbon brick impregnation:

(1) Weight gain rate. Evaluating the quality of impregnation is often judged by measuring the weight gain rate of the product after impregnation. The weight gain rate refers to the ratio of the weight gain of the same carbon billet after impregnation (i.e. the mass immersed in the impregnating agent) to the mass of the carbon billet before impregnation. The higher the weight gain rate of impregnation, the better the impregnation effect. The weight gain rate of impregnation decreases rapidly with the increase of impregnation times.

(2) Filling rate. Evaluating the impregnation effect can determine the filling rate of impregnation, which is the ratio of the volume occupied by the impregnating agent asphalt entering the pores of the filled carbon billet to the total volume of all pores. The higher the impregnation filling rate, the better the impregnation effect.

(3) Immersion depth. The above two methods both have certain limitations, and the evaluation of impregnation quality should also focus on whether the carbon billet is soaked, that is, whether the uniformity of density inside and outside the carbon billet is ensured. Usually, the carbon billet should be soaked and the coal tar pitch inside the pores should reach a saturated state.

In production, the impregnation product can be interrupted and the immersion depth of coal tar pitch into the carbon billet can be observed from the cross-section. Qualified impregnation products should not see any sections that have not been impregnated.

(4) Ultrasonic testing. According to the principle that the diffusion speed of ultrasonic waves in carbon billets is related to the density of carbon billets, the impregnation quality of carbon brick green billets can be evaluated through ultrasonic technology.

(5) Theoretical weight gain rate. In foreign countries, theoretical weight gain rate is also used to determine the impregnation effect. The so-called theoretical weight gain rate refers to the maximum weight gain rate calculated by the impregnating agent asphalt entering all the pores or pores inside the carbon brick green body. The theoretical weight gain rate is only related to the properties of the impregnating agent asphalt and the properties of the roasted carbon brick green body (volume density and true density). The higher the density of the impregnating agent asphalt, the greater the theoretical weight gain rate.

In actual production, if the cross-section of the carbon billet can be soaked, but the weight gain rate cannot meet the requirements, it indicates that the impregnation quality has not yet reached the optimal effect, that is, the impregnating agent asphalt has not reached the saturation state, and there is still potential for further improvement.