Production process of refractory brick:

1. Raw materials

Each batch of raw materials into the factory must issue a product quality guarantee, and at the same time, according to the indicators on the quality guarantee, three sampling tests: index test, physical and chemical performance test, refiring furnace firing test, qualified before being put into production, must be pickling, iron absorption secondary finishing treatment before putting into production, so that the quality of raw materials to achieve the best state of making products.

2. Mix and train

The raw material preparation personnel shall prepare the raw material in strict accordance with the requirements of the technical department. In the preparation process, it is necessary to accurately weigh and mix on time. The specific operation is: less than 100 mesh fine powder needs to be premixed first, and through 24 mesh sieve twice, the binder needs to be soaked for more than 24 hours, the cumulative mixing time should not be less than 20 minutes, and it is necessary to use the same material on the same day, so as to avoid residual mixing, and to achieve on-site sanitation and cleaning to ensure the purity of raw materials.

3. Forming and testing

In the molding process to take what forming means need to be based on the structure of the product to formulate, but no matter what kind of forming means, in the mold installation process need to pay special attention to the structure of the product, in the molding process of the first block of semi-finished products must be inspected before the production can continue, and in all semi-finished products on the product model, net weight and production date, the logo should be clear, In order to carry out quality tracking inspection, at the same time, the operator must do self-inspection, self-pick, take the initiative to remove the waste defective products, can not be shod, the quality inspector should check according to the drawing size one by one, to ensure that the size is correct, and should spot check whether the semi-finished products have spillage, loose, segregation, cave, incomplete corners and other phenomena, find problems, solve in time, to ensure the yield of semi-finished products. After passing the inspection, the production and Technology Department will test the resistant material sample brick with the re-burning furnace, and the test can be dried after passing the test. Under the premise of ensuring the quality, the production schedule must be guaranteed at the same time, so as to deliver the product on time.

4. Dry

After passing the inspection, the semi-finished product must be cooled and dried in the designated place for 2-3 days before entering the drying kiln. In the drying kiln,

First placed at a low temperature of about 25-30 ° C for 3-5 days, and then moved to a high temperature of 50-65 ° C for mandatory drying 7-15 days, in the entire drying process, the operator should be careful to avoid the semi-finished product missing edge missing Angle phenomenon, at the same time, the operator should fill in the drying record, indicating the production date, in order to burn smoothly.

5. Burn

Kiln operators must operate in strict accordance with the firing curve formulated by the technical department during the firing process, because of the narrow temperature difference range of the brick firing, it is necessary to adjust the temperature control according to the data of the automatic tester. In the firing process, the operator should fill in the true temperature record, in the process of loading out the kiln should be handled lightly, reduce artificial damage, and assist the relevant personnel to fill in the clear kiln entry and exit orders, and strive to complete the burning task of the ceramic burner product with quality and quantity on time.

6. Finished product inspection

After each kiln product is out of the kiln, the finished product quality inspector must conduct timely inspection, and the inspection method adopts the full inspection system, including the inspection of appearance size, physical and chemical indicators, melting holes, spalling and other indicators. The tolerance of resistant materials to be assembled should be controlled within 0-0.5 to facilitate assembly. The testing standard shall be carried out according to the inspection standard and the user's contract requirements. After passing the inspection, the finished products shall be stacked neatly in the designated place and covered with film. The finished products of each kiln shall be made and reported to the production department in time.

7. Packaging and shipping

The finished products shall be packaged in time on the premise that all the tests are qualified and the quantity meets the requirements of the contract. The supply department shall provide the corresponding packing cases and fillings according to the requirements of the user in advance, and ship them successively according to the delivery time of the contract. In the process of shipment should be strictly in accordance with the delivery procedures, issue the corresponding procedures and product physical and chemical index test report, product certificate.

7.1. Requirements

7.1.1, can withstand the needs of long-distance transportation, handling, loading and unloading, warehousing, no damage, no deformation.

7.1.2, each box weight is less than 700kg, each brick must be printed brick type.

7.2. Marking

On the front and side of the forklift operation, the following main signs are marked with non-fading pigments:

Item code Name of the goods

Contract number Brick number

Quantity of units received (block)

Shipping unit weight (tons)

Carton number

7.3. Materials and packing liners for boxes

7.3.1. The products are packed in 90×70×55mm wooden cases.

7.3.2. Special packing liner (cardboard) must be used between bricks and bricks, the stressed liner is filled with the corresponding material, and the non-stressed liner is made of paper wool strip, foamed styrene, etc. Proper measures should be taken to protect the weak and easily damaged parts of the firebrick.

7.3.3. The edges and corners of the top surface and vertical face of the packing box shall be fixed with blue black iron sheet in the shape of an Angle iron, and then tied with a total of six strips of packing iron sheet, four vertical and two horizontal.

7.4. Transportation, delivery time and place

7.4.1. The supplier shall be responsible for the transportation.

7.4.2, delivery time: in accordance with the time stipulated in the contract and the requirements of assembly, according to the parts, brick number batch delivery.

7.4.3 Place of delivery: delivered from the warehouse provided by the demander or delivered directly to the site.

7.5. Save

Products need to be stored in a ventilated, clean, dry, fireproof, damage-proof environment, isolated storage if necessary, the storage period of products varies, under normal circumstances 3 years shaped products, mud 6 months, castable 6 months, if the storage period exceeds the product if it needs to be used, it needs to be tested first, tested before it can be used.

8. Inspection method and acceptance inspection:

The inspection method used for each batch of materials is determined by mutually agreed characteristic parameters in accordance with the standard principles provided by the tenderee.