Uniformity effect of wldh screw belt mixer

The uniformity effect of wldh screw belt mixer? 1 The meaning of screw belt mixer powder mixing Powder mixing is a process in which more than two components are mixed by external force in the dry state or in the presence of a small amount of liquid to reduce the heterogeneity The so-called two or more components can be different substances or the same substance with different physical properties: different moisture content, different particle diameter, different color, etc Powder mixing is a complex random process, and the evaluation and measurement of mixing quality has been a difficult problem With the development of the times, the days of judging the mixing uniformity by the sense of human facial features have passed Using scientific and quantitative form to determine the mixing uniformity is the quantitative analysis of powder mixing To achieve quantitative analysis, there must be several processes of sampling, testing and statistical analysis (data processing), so as to obtain a single quantity value to express the uniformity of the mixture 2、 The screw belt mixer takes a small amount of material from a certain position in the mixture, which is called "sampling" This small amount of material is called "observation sample" or "point sample", and the sampling position is called "sampling point" In the same container, at the same time level, samples from different sampling points constitute "samples" at this time level The number of point samples is the sample size About the size of the sample: the smaller the sample, the better, on the premise that it can meet the needs of the test and may be representative of the materials around the sampling point The sample is too large, which not only wastes the material, but also is disadvantageous to the accuracy of quantitative analysis About the number of samples (i.e the size of samples): the more samples, i.e the larger the samples, the more reliable the quantitative analysis results and the smaller the error rate But so far, the number of better samples has not been determined According to the suggestion of American Chemical Engineering Association, 5-15 samples are required, and some people think that at least 20 or even 50 samples are needed In China, it is customary to take 5-10 samples As for the position of sampling point, when the material is in a static state, the sampling point shall be distributed in all positions of the material as much as possible If the sample can be taken in the moving flow of the mixture, the analytical results are more accurate than those obtained in the static state Therefore, if conditions permit (for example, better mixing time has been determined), the method of sampling in mixer outlet logistics is good 3、 The sample will be obtained by spiral belt mixer, and the content of each component (especially the key component tracer) will be determined by chemical or physical methods: X If the number of samples is 5, five results are detected: X1; x2; X3; X4; X5 As for the detection method, it should be determined by the properties of components, the purpose of mixing and the actual conditions 4、 Statistical analysis uses statistical method to calculate the above test results and get a single value to evaluate the mixture quality, which is called statistical analysis method Jiangyin Lingling Machinery Manufacturing Co., Ltd is committed to the R & D, production and sales of pulverizers, mixers, sifters, granulators, dryers, tablet presses, conveyors, capsule powder equipment and other equipment The company has a prosperous economy and convenient transportation With strong technology, technology and scientific management concept, the company has produced products all over the country Some products have entered the UK, Sweden, Latvia, Romania, Saudi Arabia, Malaysia, India, Ecuador, Suriname and other countries and regions, and are highly recognized and trusted by customers at home and abroad The development of an enterprise is inseparable from scientific productivity and management, and from the suggestions and encouragement of users For this reason, the company adheres to the concept of "scientific development, service to people" and constantly improves itself It has passed ISO9001 quality system certification and followed GMP standards.