The precautions to be taken when applying Ewende micro silica powder (silica fume) in the chemical industry are as follows:
- Safety protection:
– Dust hazard protection: micro silica powder particles are fine, in the use of the process is easy to form dust flying. Long-term inhalation of silica dust may lead to respiratory fibrosis, resulting in “pneumoconiosis” and other occupational diseases. Therefore, operators must wear standard dust masks, goggles and other protective equipment to avoid dust damage to the eyes, respiratory tract and other injuries.
– Fire and explosion prevention: Although micro silica powder itself is not flammable, other flammable and explosive substances may exist in the chemical production environment. It is necessary to ensure that the workplace is well ventilated to avoid the accumulation of micro silica powder dust to form a potential explosion hazard.
- Storage and transportation:
– Storage conditions: micro silica powder should be stored in a dry, ventilated, rain-sheltered and sun-shaded environment. Avoid moisture, because when it meets water, the micro-silica powder will be agglomerated, resulting in the loss of activity, affecting its performance. At the same time, it should be prevented from prolonged exposure to sunlight, so as to avoid weathering of the bag, resulting in product spillage.
– Transportation safety: In the process of transportation, we should ensure that the package is intact, to avoid bag breakage resulting in leakage of micro silica powder. Transportation vehicles should be kept clean and dry to prevent mixing with other chemicals to avoid chemical reaction.
- Quality control aspects:
– Purity test: The purity of micro silica powder from different sources and production processes may vary. Before applying to the chemical industry, the chemical composition of micro silica powder needs to be tested to ensure that the content of silica, its main component, meets the requirements, and at the same time, the content of impurity components, such as iron oxide, alumina, calcium oxide, etc., should be controlled within the permissible range, so as not to affect the quality of the product.
– Particle size control: the particle size of micro silica powder has an important impact on its application performance. According to different chemical application requirements, select the appropriate particle size of micro silica powder. For example, when used as a dispersant, a smaller particle size of micro silica powder is needed to improve the dispersing effect; when used as a filler, the uniformity of particle size distribution is more important.
- Process operation:
– Dosage control: the dosage of micro silica powder needs to be determined according to the specific chemical products and process requirements. Generally speaking, too much dosage may lead to a decline in product performance, such as affecting the fluidity of the material, increase the viscosity of the product, etc.; too little dosage may not achieve the desired results.
– Mixing uniformity: In the production process of adding micro silica powder to chemical products, it is necessary to ensure uniform mixing. Appropriate mixing equipment and mixing time can be used to make the micro silica powder fully dispersed in the matrix material to avoid agglomeration phenomenon, which affects the performance uniformity of the product.
– Compatibility with other additives: When micro-silica powder is used together with other additives such as water reducers, plasticizers, catalysts, etc., attention should be paid to the compatibility between them. Sufficient tests and verifications should be carried out to ensure that there will be no interaction between different additives, which will affect the performance and quality of the products.
- Environmental protection:
– Dust emission control: in the production process, effective dust collection and treatment measures should be taken to reduce the emission of micro silica powder dust. Dust can be collected using dust collectors and other equipment to avoid dust pollution of the environment.
– Waste disposal: For the waste of micro silica powder after use, it should be handled in accordance with relevant environmental regulations. If the waste contains hazardous substances, special treatment and disposal is required to prevent pollution of the soil, water and other environments.