Production scheme

1.. Product: fly ash autoclaved aerated concrete block with capacity of 100, 000 m3.

1. 产品为粉煤灰加气混凝土砌块，产量为年产10万立方米。

4生产工艺流程简述

Brief introduction of process flow

1.Raw material storage and treatment

2.Batching, mixing and casting

Lime, cement and gypsum powder are separately conveyed by single-tube feeder at the bottom of storage silo into electric scale for powder material. After accumulated measuring, they are conveyed into casting mixer by discharge device on scale.

After the valve under the slurry tank opens, the fly ash slurry is directly put into slurry electric scale in batching plant for accumulated measuring. When the slurry weight reaches the requirement of batching, the automatic-control system will close discharge valve of slurry pump Measured slurry is directly put into casting mixer for mixing according to the instruction.

After manually measuring, aluminum powder is poured into aluminum powder mixer to make into suspension. Make once for one mould. The mixed suspension is directly put into casting mixer.

The slurry’s temperature should reach requirement for technology before casting. If temperature is not enough, steam shall be used here to heat. When casting, moulds are carried by ferry push car to be in place under casting mixer for casting.

3.Cutting and grouping

After stopping and maintaining to reach cutting strength, and is lifted by turning toplift of turn hoist (16t) and turned onto stationary support of cutter, to make the green blocks headstand when demoulding. Horizontal cutting and cross cutting will be done by cutting device to finish cut work.

The grouped green blocks together with side board will be lifted by semi-finished toplift of load hoist(8t) before autoclave to trolley before autoclave. One trolley three mould. The stacked trolleys are pulled by slow-motion windlass to the railway before autoclave for grouping. Put six trolleys on every railway.

4.Steam curing&finished product

The grouped green blocks are pulled into autoclave by slow-motion windlass for steam curing. The constant voltage curing time is about 7.5 h with pressure of 1.3Mpa and temperature of about 190℃.

After steam curing, the products are pulled out of autoclave by windlass and lifted onto transport trolley by toplift for out of autoclave and then delivered out of factory or transported to stock dump for storage..

5.Motherboard returning and mould-grouping&oiling

After lifting the finished products, curing trolley and motherboard are lifted by finished product toplift to trolley returning line and return to one side of cutting machine. The toplift hangs motherboard, at the same time, it hangs mould frame and motherboard for mould-grouping and then returns to put moulds on mould returning railway for cleaning and oiling and then do circulation casting.

4.2配料、搅拌、浇注

石灰、水泥、粉石膏由仓底单螺管给料机送入电子粉料计量称内，经累积计量后由计量秤的卸料装置卸到浇注搅拌机内。

粉煤灰浆及废浆由料浆储罐下的阀门打开后放入搅拌坑内，由渣浆泵送到配料楼上的中间罐内，然后在放入料浆电子计量称内进行累积计量，当料浆重量达到配料要求时，由自控系统关闭储罐放料阀，停止放料。计量好的料浆按指令放入浇注搅拌机内。

铝粉浆料由自动计量后，直接放入浇注搅拌机内。

料浆在浇注前温度应达到工艺要求。如温度不够在配料时要采用热水罐中的热水搅拌。浇注时，模具通过摆渡车运送至浇注搅拌机下就位，浇注搅拌机放料浇注。

4.2Batching, mixing and casting

Lime, cement and gypsum powder are separately conveyed by single-tube feeder at the bottom of storage silo into electric scale for powder material. After accumulated measuring, they are conveyed into casting mixer by discharge device on scale.

After the valve under the slurry tank opens, the fly ash slurry is directly put into slurry electric scale in batching plant for accumulated measuring. When the slurry weight reaches the requirement of batching, the automatic-control system will close discharge valve of slurry pump Measured slurry is directly put into casting mixer for mixing according to the instruction.

After manually measuring, aluminum powder is poured into aluminum powder mixer to make into suspension. Make once for one mould. The mixed suspension is directly put into casting mixer.

The slurry’s temperature should reach requirement for technology before casting. If temperature is not enough, steam shall be used here to heat. When casting, moulds are carried by ferry push car to be in place under casting mixer for casting.

1. 4.3切割、编组

静停初养达到切割强度后，由切割线翻转桁车(10 t)上的翻转吊具吊运翻转脱模使坯体倒立。放至切割机切割车上, 行走进行纵切和横切，完成切割。

切割好的坯体连同侧板由釜前装载桁车（10 t）上的半成品吊具吊运至蒸养小车上，每车堆放两模，堆放好的蒸养小车由摆渡车和牵引机牵引在釜前轨道上进行编组，每条釜前轨道编放七辆蒸养小车。

4.3Cutting and grouping

After stopping and maintaining to reach cutting strength, and is lifted by turning toplift of turn hoist (16t) and turned onto stationary support of cutter, to make the green blocks headstand when demoulding. Horizontal cutting and cross cutting will be done by cutting device to finish cut work.

The grouped green blocks together with side board will be lifted by semi-finished toplift of load hoist(8t) before autoclave to trolley before autoclave. One trolley three mould. The stacked trolleys are pulled by slow-motion windlass to the railway before autoclave for grouping. Put six trolleys on every railway.

2. 4.4蒸压及成品

编组好的坯体由牵引机拉入釜内进行蒸压养护，蒸养周期时间12h左右，蒸汽压力1.3MPa，温度194℃左右。

制品经蒸压养护后由摆渡车上的慢动式卷扬机拉出釜，送到出釜轨道上，由分垛吊机吊到掰板机的滚道上，由掰板机进行分离，成品由成品吊机的夹具放到成品辊道的托盘上，由叉车送到成品堆场存放出厂。

4.4Steam curing&finished product

The grouped green blocks are pulled into autoclave by slow-motion windlass for steam curing. The constant voltage curing time is about 7.5 h with pressure of 1.3Mpa and temperature of about 190℃.

After steam curing, the products are pulled out of autoclave by windlass and lifted onto transport trolley by toplift for out of autoclave and then delivered out of factory or transported to stock dump for storage..

3. 4.5底(侧)板返回、组模涂油

成品吊运完后，侧板经辊道返回到翻转吊机处，与模具合模，进行清理涂油，然后再进行循环浇注。

4.5Motherboard returning and mould-grouping&oiling

After lifting the finished products, curing trolley and motherboard are lifted by finished product toplift to trolley returning line and return to one side of cutting machine. The toplift hangs motherboard, at the same time, it hangs mould frame and motherboard for mould-grouping and then returns to put moulds on mould returning railway for cleaning and oiling and then do circulation casting.