Recently, a quality inspection report has pushed the tile industry, which has always had nothing to do with human health, to the abyss of "quality doors." The 2009 Quality Assurance of the 2nd Batch of National Quality Supervision and Inspection issued by the AQSIQ announced that the “limited radionuclide limits†of the 3 brands of the two brands were unqualified, and that one stone provoked thousands of layers of waves, which caused great publicity among the citizens. Repercussions and panic on the “tile cancer causeâ€. The reporter visited ceramic companies, ceramic industry associations, and hospital oncology for this purpose and interviewed a number of experts in different fields.
Adding zirconium silicate for "whitening"
According to Wang Bo, a senior engineer of the Xianyang Ceramic Research and Design Institute, one of the sampling agencies, the AQSIQ's inspection items for ceramic tile products include 10 sizes, water absorption, damage intensity, and radioactivity. Why does ceramic bricks contain radionuclide limits? Ceramic tiles are neither stone nor metal. Why do they contain radioactive elements? Is it harmful to humans? The reporter learned that ceramic tiles are particularly polished. In the production process, in order to achieve the effect of whitening, the brick will be added in an appropriate amount of zirconium silicate. Although zirconium silicate itself is not radioactive, some enterprises add excessive amounts of ultra-white bricks to produce other invisible elements. content.
Mr. Zhong, a well-known ceramics technical director of Foshan City, introduced that radionuclides are like melamine and other substances. Only when they reach a certain amount and have long-term effects will they be harmful to the human body. “Building Materials Radionuclide Limits†is for natural materials in building materials. Radioactive nuclides, radium, thorium, potassium specific radioactivity limits are quite low, and almost negligible compared with the stone radioactive limit standards, it is only the country's self-discipline requirements and protection for the ceramic industry.
Tile carcinogenic and no examples
For the recent rumors that ceramic tile radioactive exceeds the standard, Yin Hong, secretary general of Foshan Ceramic Industry Association, will firmly deny it. He explained that at the time of formulating the “Limit of Radionuclide for Building Materials†standard, some experts thought that “the radiation of building and sanitary ceramic products was harmful to human body†lacked medical evidence. In Jingdezhen, Guangdong, Foshan, Guangdong, Tangshan, Hebei, and other millenium-made pottery producing areas, none of the first-line workers found health abnormalities and related medical cases because of constant contact with ceramics.
Wang Bo, the deputy secretary-general of the National Building Sanitary Ceramics Standardization Technical Committee, stated that radioactive elements include long-lived natural radioactive isotopes such as uranium, plutonium, radium, and potassium, divided into natural radiation and artificial radiation, as long as the radiation dose does not exceed the individual dose limit, Radioactivity will not cause harm to the human body. Popularly speaking, the effect of radiation from a Class B tile on the human body is less than the radiation generated by a cell phone call for one minute.
Although the heads of ceramic companies and ceramics industry experts have said in unison that ceramic tiles will not cause cancer, it will inevitably make people feel that there is a family of suspected. To this end, the reporter interviewed Director Chen of the Department of Hematology of the First Affiliated Hospital of Guangzhou TCM University. He explained that it is possible that radioactive elements cause malignant tumors. Generally, it is induced by cytopathies, leading to leukemia, lymphoma, skin cancer and other blood cancers. . Regarding the issue of malignant tumors caused by excessive radioactivity in ceramic tiles, Director Chen stated that in his clinical experience and domestic case literature, he has not encountered such cases and related records.
There are alternatives but the cost is high
Domestic ceramic tile disputes endlessly, but the foreign ceramic industry related standards and what is it? Italy St. Augustine ceramics factory representative Chen Guowei told reporters that Italy and other major ceramic producing countries in the world ceramic tile detection of radioactivity is no indicator requirements, Because this is the most basic requirement. For setting the radioactivity standards for ceramic tiles, we can't simply say that there is good and no, it is not good. Chen Guowei also revealed that the foreign tile inspection focuses on environmental protection, including the industrial environmental protection index in the production process and the environmental protection factor in the production process.
Since the excessive addition of zirconium silicate leads to an increase in the radioactive content, is there a high safety raw material to replace zirconium silicate? Liang Yiliu, director of the inspection office of the Guangdong Province Technical Supervision Quality Supervision and Inspection Station, said that high brightness whitewashing mud The same "whitening" function, but 10 times the washing mud to achieve 1 times the effect of zirconium silicate, and the process of refining the elutriation mud is complicated, so that the cost of the tile is soaring. Therefore, he suggested that consumers should not blindly pursue whiteness when buying ceramic tiles, and try to pick yellowish and grayish ceramic tiles.
Health is extremely important. It concerns yourself and your family and must be treated with caution.
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