Five processes for making aerated block products:
September 07, 2021
1. Raw materials for the storage and feeding of aerated blocks are transported into the plant by truck. Fly ash (or sand and stone powder) is concentrated in the raw material yard and transported into the hopper when in use. Bagged cement or bulk cement shall be stored in the cement warehouse. Use shipping hopper when in use. Chemicals and aluminum powder shall be placed in the chemical warehouse and aluminum powder warehouse respectively, and shall be transported to the production workshop when in use.
2. The raw materials of aerated block are treated by ball mill. The fly ash (or sand and stone powder) is sent to the ball mill through electromagnetic vibration feeder and belt conveyor. The ground fly ash (or sand and stone powder) is sent to the slurry tank for storage by fly ash pump.
The lime is sent to the jaw crusher for crushing through the electromagnetic vibration feeder and belt conveyor. The crushed lime is sent to the lime storage bin through the bucket elevator, and then sent to the ball mill through the screw conveyor. The ground materials are sent to the powder batching bin through the screw conveyor and bucket elevator. It can be seen that the production of raw materials is very important.
After the chemicals are measured manually in a certain proportion, they are made into a solution with a certain concentration and sent to the storage tank for storage.
The aluminum powder is transported from the aluminum powder warehouse to the production workshop, lifted to the second floor of the batching building with an electric hoist, poured into the mixer to add water quantitatively and mixed into aluminum powder suspension. 3. The aerated block batching, mixing, pouring lime and cement are successively sent to the automatic metering scale for cumulative measurement by the screw conveyor under the powder batching bin. There is a screw conveyor under the scale, which can evenly add the materials into the pouring mixer.
Fly ash (or sand, stone powder) and waste slurry are put into the metering cylinder for metering. When the mold is in place after metering of various materials, slurry mixing can be carried out. The slurry shall meet the process requirements (about 45 ℃) before pouring. If the temperature is not enough, it can be heated by steam in the slurry metering tank, and aluminum powder suspension can be added 0.5 ~ 1 minute before material pouring.
4. After primary curing, cutting and pouring of aerated block, the mold is pushed into the primary curing chamber with conveying chain for gas generation and initial setting. The room temperature is 48 ~ 68 ℃, and the initial curing time is 1.5-2 hours (this process can be avoided according to favorable geographical conditions). After primary curing, the mold frame and blank are hoisted to the cutting table with pre placed bottom plate with negative pressure spreader. Remove the mold frame. The cutting machine is used to cut the blank horizontally, longitudinally After milling the head, the mold frame is lifted back to the mold carrier for manual cleaning and degreasing, and then lifted to the mold carrier to form the mold for the next pouring. The cut blank and the kettle bottom plate are lifted to the kettle carrier with a crown block and stacked for two layers. There are four supports between the layers, and several kettle carriers are organized into a group.
The corner waste of the green body generated during cutting is sent to the waste slurry stirring loop machine next to the cutting machine through the screw conveyor, and the waste slurry is made by adding water for batching.
5. After the autoclave of the aerated block and the finished body are grouped on the parking line in front of the autoclave, open the autoclave door to be out of the autoclave, first pull out the finished autoclave car in the autoclave with a winch, and then pull the autoclave car ready for autoclave into the autoclave with a winch for maintenance. The finished products on the kettle car are hoisted to the finished product warehouse by bridge crane, and then transported to the finished product storage yard by fork truck. The empty kettle car and kettle bottom plate are hoisted back to the return line. After cleaning, they are pulled back to the yard frame by winch for the next cycle.
Typical raw material formula and consumption of fly ash aerated concrete block: fly ash content: 70%; Consumption per cubic meter: 350kg; Cement content: 13.8%; Consumption per cubic meter: 25-30kg; Lime: content ratio 13.8%; Consumption per cubic meter: 140-150kg; Phosphogypsum: content ratio 2.96%; Consumption per cubic meter: 15kg; Aluminum powder: trace content; Consumption per cubic meter: 0.4KG.
Typical raw material formula and consumption of sand aerated concrete block: sand content: 69.2%; Consumption per cubic meter: 350kg; Cement content: 13.8%; Consumption per cubic meter: 70kg; Lime: content ratio 13.8%; Consumption per cubic meter: 70kg; Anhydrite (gypsum): content ratio 2.96%; Consumption per cubic meter: 15kg; Aluminum powder: trace content; Consumption per cubic meter: 0.4KG.