Wool primary processing: 1 wool selection -2 wool opening -3 wool washing -4 drying-(carbonization and impurity removal) -4 wool blending -5 wool oil -6 combing -7 needle thinning -8 combing -9 water washing-10 international sliver making and combing. Before spinning and combing wool, the washed loose wool should be processed into combed tops, which is called top manufacturing project. In the production process of combed wool spinning, wool will become very clean, so as to prepare for the next step (1). Wool to be cut from sheep is called raw wool. Because the raw wool is mixed with various physiological impurities and dirt in the living environment, it can not be directly put into wool spinning production. Therefore, a series of chemical and mechanical methods must be adopted to remove impurities to meet the requirements of wool spinning production. This series of treatments are all wool. Preliminary processing, the processed wool fiber is called wool washing. The production process of raw wool preparation is: wool selection-opening-washing-drying. For raw materials with more impurities, carbonation is allowed to remove plant impurities 1, and wool selection lt; /span>。 2. Most of the sorted wool is lumpy, and the fibers are tightly wound, which is not conducive to wool washing and impurity removal. Therefore, before wool washing, it is necessary to open and remove impurities from the raw wool with a opener to improve the efficiency and quality of wool washing. 3. The purpose of wool washing is to wash off lanolin, sheep sweat, sand and dirt on wool fibers, and the key is to wash off lanolin. The method adopted is to add washing liquid containing detergent, and the detergent penetrates into the gap of the dirt layer of wool grease, reducing the binding force between the dirt layer and wool fibers, so that the dirt layer is separated from the wool surface and transferred to the washing liquid. At the same time, the lanolin emulsified by glass suspends the dirt and impurities in the washing solution and will not return to the wool fiber, thus achieving the purpose of washing all the way. Commonly used detergents are mainly soap-based and synthetic detergents. In the washing tank, it is necessary to use mechanical action to push, squeeze and wash wool to improve its decontamination efficiency. 4. Wool washing after drying and washing generally contains about 40% moisture, and it must be dried before storage or transportation. Drying is carried out on a dryer that can generate circulating air with a certain flow rate and temperature, so that the moisture on the surface of wool can be evaporated and the purpose of rapid drying can be achieved. At present, all factories use washing and drying machines to finish opening, washing and drying, and get washed wool. 5. Some plant impurities in carbonized raw wool, such as grass thorns and leaves, are closely intertwined with wool and are not completely removed during opening and washing. In order to ensure the processing quality of the next process, a weeding process should be added, that is, impurities should be completely removed by mechanical or chemical methods. Mechanical weeding is to loosen wool and separate impurities through mechanical carding. Its disadvantage is that weeding can not stabilize the bottom and damage the fiber length greatly, so it has been rarely used. The method of weeding by chemical action is called carbonization. The principle of this method is that, in view of the acid resistance of wool and plant impurities, the grass-containing wool is treated with sulfuric acid solution, then dried and baked, so that the grass-containing impurities become fragile carbon, thus separating it from wool and achieving the purpose of impurity removal. Make the wool cleaner. Reach the ideal state.