How to Make Fire Bricks
Refractory brick production process and delivery process: material selection, high temperature calcination, sorting and grading, crushing and grinding, scientific ingredients, mixing, trapping materials, strong restriction molding, standing and boring, high temperature firing, kiln inspection and packaging, loading factory .
1. Raw Materials of Refractory Brick
Each batch of raw materials must be issued with a product warranty and three sampling tests according to the indicators on the warranty: index test, physical and chemical performance test, re-fired furnace burn test, qualified before being put into production, must be carried out before being put into production .The pickling and iron absorption secondary finishing process makes the quality of the raw materials reach the best condition for the production of the refractory products.
2.Fire Brick Mixing
The raw material preparation personnel shall be formulated in strict accordance with the process ratio requirements formulated by the technical department. Accurate weighing must be done during the preparation process and mixed on time. The specific operation is as follows: the fine powder of less than 100 mesh needs to be premixed first, and passed through the 24 mesh sieve 2 times. After the binder is brewed, it needs to be volted for more than 24 hours. The accumulated mixing time should not be less than 20 minutes. On the day of the day, in order to avoid the remaining mixing, and to do the cleanliness of the site to ensure the purity of raw materials.
3. Forming and Inspection
The molding method adopted in the molding process needs to be formulated according to the structure of the product, but no matter what molding method is adopted, special attention should be paid to the structure of the product during the mold installation process. The first semi-finished product formed during the molding process must be After the inspection is passed, the production can be continued, and the product model, net weight and production date should be marked on all the semi-finished products. The label should be clear for quality follow-up inspection. At the same time, the operator must perform self-checking and self-picking, and actively reject the defective products. The quality inspector should check it one by one according to the size of the drawings to ensure that the size is correct. At the same time, it is necessary to check whether the semi-finished products have cracks, looseness, segregation, karst caves, incomplete corners, etc., find problems and solve them in time to ensure After the inspection of the semi-finished products, the biotechnology department will use the re-burning furnace to test the refractory bricks. After the test is passed, the refractory bricks can be dried. Under the premise of ensuring the quality, the production schedule must be guaranteed to be delivered on time.
4. Dry Pressed Clay Bricks
After passing the inspection, the semi-finished products shall be allowed to dry in the designated place for 2-3 days before entering the drying kiln. In the drying kiln.
Firstly, it is dried at a low temperature of about 25-30 °C for 3-5 days, then moved to a high temperature of 50-65 °C for forced drying for 7-15 days. During the whole drying process, the operator should be careful. Be cautious to avoid the occurrence of missing corners in the semi-finished products. At the same time, the operator should fill in the dry record and indicate the date of manufacture so that the firing can proceed smoothly.
5. Firing Fire Brick
The kiln operators must strictly follow the firing curve formulated by the technical department during the firing process. Because the temperature difference of the firing of the bricks is small, the temperature control should be adjusted according to the data of the automatic tester. During the firing process, the operator should fill in the actual temperature increasing record. During the process of loading the kiln, it should be handled with care, reduce the damage caused by humans, and assist the relevant personnel to fill out the clear kiln list and the kiln list. Strive to complete the firing task of ceramic burner products on time and in quality.
6. Finished Product Inspection
After each kiln product is discharged from the kiln, the quality inspector must carry out inspection in time. The inspection method adopts full inspection system, including the appearance size, physical and chemical indicators, melting holes, cracks and other indicators. The tolerance of the refractory materials to be assembled should be controlled. At +0-0.5, for assembly, the inspection standard is based on the inspection standard and the user's contract requirements. After passing the inspection, the finished products should be piled up neatly at the designated place, covered with film, and the finished product list of each kiln should be reported to the production department in time.
7. Packaging and Shipping
The finished product shall be packaged in time on the premise that all tests are qualified and the quantity meets the requirements of the number of contracts. The supply department shall provide the corresponding packing boxes and fillings in advance according to the requirements of the users, and deliver them in accordance with the delivery deadline of the contract. In the process of shipping, it should be carried out in strict accordance with the delivery procedures, and issue corresponding procedures and product physical and chemical indicators test report sheets and product certification.
