Sliding gate castable brick is a key component of steel barrels. The gate arrangement of the gate cylinder is determined by the size and shape of the sliding gate castable brick. Therefore, the dimensional and shape tolerances of the sliding gate castable brick directly affect the accuracy of the opening and closing of the gate cylinder, thus affecting the production results and working conditions.
Slip gate castable ceramic material is a kind of refractory material popularized in industry, which can be loaded into and unloaded in a certain shape in industry to make firebrick. It is usually composed of fused material, fine aggregate, binder, admixture and other components. In order to ensure the accuracy of steel barrel size and shape, the size and shape tolerances for the sliding gate castable brick should be strictly regulated when designing and producing castables.
1、Size and shape of sliding gate castable brick
When using sliding gate castable brick, the size and shape should meet the requirements of the secret drawing standard. According to the size of the template, the size of the sliding gate castable brick should be determined. Generally, the length of the sliding gate castable brick is 800 mm ~ 1000 mm, the width is 200 mm ~ 300 mm, and the thickness is 50 mm ~ 60 mm.
In terms of shape, the correct size and shape that meet the requirements are basically the same as the size and shape of the steel barrel. Generally speaking, the size of the sliding gate castable brick should be subjected to the required diameters and radian tolerances, and is generally within the range of ± 0.5mm. The radial surface of the sliding gate castable brick should also be within the range of ± 0.2mm.
2、Weight of sliding gate castable brick
At the same time, the total weight of the sliding gate castable brick should also meet the key points of design. Generally speaking, the total weight of the sliding gate castable brick should be between 1000 kg and 3000 kg. It is suggested that its specific weight should be determined according to the power of the gate cylinder and the specific requirements for closing and opening.
In addition, attention should be paid to the location of the gate castable when measuring the total weight of the gate castable. When measuring the total weight of the gate castable, the weight should be measured within the design size range of the gate cylinder, and the measured total accuracy should be in line with the requirements.
3、Surface quality of sliding gate castable brick
In addition, sliding gate castable brick should also pay special attention to surface smoothness and enable the gate cylinder to close more smoothly when it is produced. Generally speaking, the surface of the sliding gate castable brick should be within the range of ± 0.2mm, and the surface roughness should not exceed Ra1.6μm.
4、Inspection of sliding gate castable brick
When produced, the quality of the sliding gate castable brick should also be strictly inspected. First of all, the sliding gate castable brick should pass the test of template measurement and static weight to verify the size and weight of the sliding gate castable brick. If a sliding gate castable brick with an excessive weight or a different shape and size is found, it must be replaced in time.
At the same time, the two ends of the sliding gate castable brick should also do some grinding. Before and after grinding, the width should not exceed the design range standard and should not be greater than 5mm. Only the width range and surface roughness are qualified can the sliding gate castable brick be accepted. After all the tests and inspections, it will be put into the furnace to form one castable cylinder.
According to the actual situation of steel barrels, the sliding gate castable brick should also have certain anti- corrosion measures to keep the castables from being eroded by high temperature and corrosive materials. Generally speaking, the corrosion degree of the sliding gate castable brick shall not exceed 240h. Only by meeting these requirements can the sliding gate castable ceramic material ensure the accuracy of the size and shape of the steel barrel gate, thus bringing good production results.
