The construction of refractory castables includes three stages: mixing, pouring, and curing. 1. Mixing: It must be mixed with a forced mixer or mortar mixer, and manual mixing is not allowed. Equipment and tools: forced or mortar mixer, water bucket, scale, vibrating rod, tool shovel, handcart, etc. Mixing: Add large bags to the mixer, then add small bags, dry and stir for 12 minutes before pouring in. Method for determining moisture content: To determine whether the moisture content of the mixture is appropriate, a simple "hand pinching ball" method can be used for testing. If the ball deforms and flows out from the hand seam, it indicates that the moisture content is too high; If the ball clusters crack and scatter, it means water content.

The quantity is too small. Mixed water consumption: Based on the water consumption provided in the batch product manual as the standard, strictly control the water consumption and accurately measure it. Note: 1. Tools used during the construction process, such as mixers, buckets, tool shovels, etc., should be cleaned in advance. Impurities such as lime, crushed stone, and Portland cement should not be mixed in. When mixing, the water must be clean tap water. Under the condition of vibration grouting, the water consumption was minimized as much as possible, achieving good construction results. The mixing amount of the mixer should not be too large, and the mixer should be stuck and stopped according to the type of mixer. The remaining solidified blocks cannot be mixed with water anymore. The temperature at the construction site must be between 5-30 ℃. If the temperature on the construction site is below 5 ℃, corresponding temperature rise protection measures must be taken. If the temperature on site is above 30 ℃, corresponding cooling protection measures must be taken, otherwise corresponding cooling protection measures will be taken

Difficulty or performance degradation. 2. Pouring construction: Inspection: Before pouring the material, the anchor welding should be checked for firmness, and heat-resistant screws should be used for areas above 500 ℃. The surface of the anchor should be coated with paint with a thickness of 0.5 to 1mm, or wrapped with plastic tape to cushion the expansion force after heating, and debris should be removed from the mold. Pouring time control: Newly mixed pouring materials should be poured quickly, usually within 20 minutes. Pouring: Pour the mixed pouring material into the mold and insert the vibrating rod into the mold in a timely manner. The vibration should be uniform. When the slurry on the surface of the pouring material flows, the vibrating rod moves at a speed of 1m/min.

Slowly pull out the vibrating rod. Control of on-site temperature requirements after pouring: Before condensation after pouring, the on-site temperature must be maintained at 5 ° C or above (5-30 ℃). If the on-site temperature is below 5 ° C, corresponding temperature rise protection measures must be taken, otherwise it will cause delay and result in a decrease in product performance.

Note: 1. After vibration, the surface of the poured material should be kept natural, and tools should not be used to polish it. Cement powder should not be sprinkled on the surface. The vibrating rod should be in reserve so that it can be put into use in a timely manner in case of failure.

(2) Within 24 hours after the completion of construction, especially before the hardening of the pouring material, it is not allowed to move, vibrate or compact, otherwise the pouring experience may produce cracks or even complete damage.

(3) The pouring material should be continuously constructed. When the construction joint cannot be continuously constructed due to various reasons, a construction joint can be left at the expansion joint. Otherwise, the construction joint should be made into a rough surface, that is, a horizontal groove with a depth of 10mm, a width of 20mm, and about 100mm on the pouring material.

III. Repair: Tools: polyethylene plastic film, straw bag, etc. Environmental temperature requirements and control: The curing temperature of the casting material is between 15-35 ° C. If it exceeds this temperature range, corresponding heating or cooling measures should be taken, otherwise it will lead to a decrease in product performance. Curing: After the casting material hardens, the surface of the construction body should be immediately covered with polyethylene plastic film, and grass bags should be moistened on it to prevent moisture evaporation and promote cement activation. After hardening, knocking and vibration are prohibited within one day. Generally, hardening should be carried out according to the hardening conditions.

You can demold in an hour. After demolding, it should be cured for 2 days, and polyethylene plastic film and wet grass bag should be added during curing. After 3 days of oxidation, remove the polyethylene plastic film and wet grass bag. The casting body can be dried in air for a day and then baked.