花岗岩砂制造生产线

沙子和砾石是工程建设的重要原材料之一。随着天然沙子和砾石骨料资源的枯竭以及政府管控的加强，用机制沙和机制砂代替天然沙子和砾石骨料已成为行业的必然趋势。

在以下部分中，我们以一条机械制沙生产线为例，介绍2000吨/小时花岗岩机械制沙生产线的工艺设计和设备选型。

项目介绍

原材料：花岗岩

输出能力：2000吨/小时

产品类型：根据市场需求，机械制沙和碎石生产线共有4个产品规格，分别为0-4.75毫米沙子、4.75-10毫米碎石、10-20毫米碎石和20-31.5毫米碎石。

生产线的工艺设计

设备选择

根据原始花岗岩的特点，人工砂生产线设计采用三段式半干法破碎+立轴冲击破碎整形，以及塔式制砂系统。颚式破碎机用于粗碎，液压圆锥破用于中细碎，立轴冲击破用于整形，塔式制砂系统用于制砂。

According to the requirement of the mine's annual mining volume of 3.7 million m³, the coarse crushing capacity of the machine-made sand production line needs to reach 2000t/h. The design and selection of the three-stage crushing process equipment is configured as 3 sets of 颚式破碎机 + 3 sets of medium crushing 圆锥破碎机 + 4 sets of fine crushing 圆锥破碎机.

生产线的主要破碎车间包括粗破车间、中细破及成型车间和干砂制造车间；主要筛分和洗砂车间包括除泥和洗砂车间以及筛分车间。各车间和仓库的主要设备配置如下表所示：

每个车间的工艺设计

粗碎工艺设计 - 脱沙和洗沙车间 - 半成品仓库

生产线的原材料是花岗岩。喂入粗碎机的原料粒度应控制在900毫米以内，如果有超出直径的材料，需要将其分解成小颗粒。

The raw material enters the three sets of grizzly feeders installed below through the receiving pit. The bar gap is set as 150mm, and the aggregates with particle size ≥150mm and a mixture with particle size ＜150mm are separated. Among them, the mixture with particle size less than 150mm is transported to the desilting and sand washing workshop for cleaning and desilting. The desilting and sand washing workshop is equipped with 2 sets of 2460 type circular 振动筛s, 2 sets of spiral sand washing machines, 2 sets of 1645 type linear 振动筛s and fine sand recycling machine; After desilting, the mixture with particle size ≥3mm is dewatered by linear 振动筛 and sent to the semi-finished material warehouse, and the fine sand with particle size <3mm is washed and dewatered and then enter the finished material warehouse. Stone with particle size ≥150mm is transported to semi-finished material warehouse after being coarsely crushed by 3 sets of 颚式破碎机s and the discharge opening of 颚式破碎机 is set to 200mm.

半成品仓库的工艺设计——破碎筛分车间——成品仓库

半成品仓库配备了3条地下走廊带式输送机用于出料，每个地下走廊配备5个出料口，共安装了9台振动给料机。半成品通过地下走廊带式输送机输送到中碎车间。

（2）在中碎车间设置了三台液压圆锥破碎机，中碎料由中碎圆锥破碎机破碎后，通过皮带输送机送至1#筛分车间。

(3) The 2# screening workshop is a double-layer screening building, and three circular 振动筛s are installed on each of the upper and lower floors to screen out over-diameter materials with a particle size of ≥45mm, over-diameter materials with a particle size of 31.5-45mm, and 20-31.5mm crushed stone, 10-20mm crushed stone, 4.75-10mm crushed stone and <4.75mm sand.

Among them, the over-diameter materials with particle size ≥ 45mm and 31.5-45mm are sent to the fine crushing workshop, and after being crushed in the fine crushing workshop, they are sent to the 2# screening workshop to form a closed circuit;

粒径为20-31.5毫米的碎石分为两部分（物料流可调），一部分直接输送到成品仓库，另一部分输送到细碎工艺，形成闭路循环。如需成型，则进入成品仓的那部分物料调整后进入骨料成型车间；

粒径为10-20毫米的碎石直接运输到成品仓库；

粒径为4.75-10毫米的碎石分为两部分（物料流可调），一部分直接输送到成品仓库，另一部分则输送到干法制砂车间。

粒径小于4.75毫米的砂子被运送到除砂和砂洗车间。

（4）细碎车间配备有细碎仓库和4台液压圆锥破碎机。

(5) The 2# screening workshop is a double-layer screening building, and four circular 振动筛s are installed on each of the upper and lower floors to screen out over-diameter materials with a particle size of ≥45mm, over-diameter materials with a particle size of 31.5-45mm, and 20-31.5mm crushed stone, 10-20mm crushed stone, 4.75-10mm crushed stone and <4.75mm sand. The discharge of each grade is the same as that of the 1# screening workshop.

在骨料成型车间设置了两台竖直轴冲击式破碎机。

(7) 3#筛分车间为单层筛分厂房，安装了两个圆振动筛，用于筛分粒径为20-31.5毫米的碎石、粒径为10-20毫米的碎石、粒径为4.75-10毫米的碎石以及粒径小于4.75毫米的砂子。

其中，粒径为20-31.5mm和10-20mm的碎石被运输到成品仓库；

粒径为4.75-10毫米的碎石被运输到干法造沙车间进行制沙；

粒径小于4.75毫米的沙子被运输到除沙和洗沙车间。

在干砂制造车间里，设置了两台干式塔状制沙机。

成品仓库的工艺设计——装载平台

A total of 6 warehouses are set up in the finished product warehouse, including 1 warehouse for 20-31.5mm 产品, 2 warehouses for 10-20mm 产品, 1 warehouse for 4.75-10mm 产品, and 2 warehouses for 0-4.75mm 产品. Among them, 1 underground corridor 皮带输送机 is set at the bottom of the 20-31.5mm and 4.75-10mm warehouses, and 2 underground corridor 皮带输送机s are set at the bottom of the 10-20mm and 0-4.75mm warehouses, and each underground corridor is set 5 discharge ports, and a total of 50 vibrating feeders are installed. Different finished 产品 are transported to the corresponding loading platform through the underground corridor 皮带输送机, and each belt corresponds to one loading platform. The storage bin capacity of each loading platform is about 70m³, and it is equipped with one electric arc door and one 100t weighbridge for unloading, loading and weighing.

After the project is completed and put into operation, it can meet the needs of 3.7 million m³ machine-made sand and gravel production lines per year, which can reduce the pressure on the supply of sand and gravel materials in the construction, infrastructure and key construction of the region and surrounding towns.