阅读说明：本技术 一种机制砂生产工艺 (Machine-made sand production process ) 是由 胡荣发 屠涛 侯凌翔 谢广东 于 2021-06-18 设计创作，主要内容包括：本发明公开了一种机制砂生产工艺,由下列步骤组成：1)将块石输送至颚式破碎机进行第一次破碎；2)通过反击式破碎机对粗碎产品进行进一步破碎；3)通过立磨对中碎产物进行进一步破碎,得细碎产物,对细碎产物进行三级筛选,得三级筛选产物a、b、c；4)将步骤3)所得筛选产物送入制砂机中进行制砂,分别将a、b、c送入制砂机中进行制砂,得到产物a1、b1、c1；5)对步骤4)中产物分别送入选粉机中,选粉机与脱粉机构连接,通过选粉机将a1、b1、c1中粒径小于0.08mm的细粉去除,得产物a2、b2、c2；6)将a2、b2、c2按照一定的比例进行混合,从而调节机制砂的细度模数和级配,得到成品。本发明制得产品圆形度好、产品质量大大提升。(The invention discloses a machine-made sand production process, which comprises the following steps: 1) conveying the rock blocks to a jaw crusher for primary crushing; 2) further crushing the coarse crushed product by a reaction crusher; 3) further crushing the crushed products by a vertical mill to obtain crushed products, and performing three-stage screening on the crushed products to obtain three-stage screened products a, b and c; 4) sending the screened product obtained in the step 3) into a sand making machine for making sand, and respectively sending a, b and c into the sand making machine for making sand to obtain products a1, b1 and c 1; 5) respectively feeding the products obtained in the step 4) into a powder selecting machine, connecting the powder selecting machine with a powder removing mechanism, and removing fine powder with the particle size of less than 0.08mm from the a1, the b1 and the c1 through the powder selecting machine to obtain products a2, b2 and c 2; 6) and mixing the a2, the b2 and the c2 according to a certain proportion, thereby adjusting the fineness modulus and the gradation of the machine-made sand to obtain a finished product. The product prepared by the method has good circularity and greatly improved quality.)

1. A machine-made sand production process is characterized by comprising the following steps:

1) conveying the rock blocks to a jaw crusher for primary crushing to obtain coarse crushed products;

2) conveying the coarse crushed product into a reaction crusher through a belt conveyor, and further crushing the coarse crushed product through the reaction crusher to obtain a medium crushed product;

3) sending the medium crushed product into a vertical mill, further crushing the medium crushed product through the vertical mill to obtain a fine crushed product, carrying out three-stage screening on the fine crushed product to obtain three-stage screened products a, b and c, collecting oversize materials which cannot penetrate through a first-stage screen again, sending the oversize materials into the vertical mill again, and carrying out secondary crushing on the oversize materials;

4) sending the screened product obtained in the step 3) into a sand making machine for making sand, and respectively sending a, b and c into the sand making machine for making sand to obtain products a1, b1 and c 1;

5) respectively feeding the products obtained in the step 4) into a powder selecting machine, connecting the powder selecting machine with a powder removing mechanism, and removing fine powder with the particle size of less than 0.08mm from the a1, the b1 and the c1 through the powder selecting machine to obtain products a2, b2 and c 2;

6) and mixing the a2, the b2 and the c2 according to a certain proportion, thereby adjusting the fineness modulus and the gradation of the machine-made sand to obtain a finished product.

2. The machine-made sand production process according to claim 1, wherein: in the step 3), the particle diameter of a is larger than the particle diameter of b and larger than the particle diameter of c.

3. The machine-made sand production process according to claim 1, wherein: the powder removing mechanism in the step 5) comprises a cyclone cylinder and an exhaust fan, the powder concentrator is connected with the cyclone cylinder, and the cyclone cylinder is connected with the exhaust fan.

4. The machine-made sand production process according to claim 1, wherein: in the step 5), the grain diameter of a2 which is more than 2.4mm and less than 4.75mm, the grain diameter of b2 which is more than 0.8mm and less than or equal to 2.4mm, and the grain diameter of c2 which is more than 0.08mm and less than or equal to 0.8 mm.

Technical Field

The invention relates to a machine-made sand production process, which is applied to the technical field of machine-made sand production.

Background

The machine-made sand is sand processed by the sand making machine and other accessory equipment, the finished product is more regular, and the sand can be processed into sand with different rules and sizes according to different process requirements, so that the daily requirement can be better met. The machine-made sand can be used for preparing qualified and applicable sand and stone only by professional equipment. The existing machine-made sand production technology mainly adopts equipment such as a jaw crusher, a cone crusher, a ball mill, a double-rotor sand making machine, a vertical shaft type impact crusher and the like as main crushing equipment, but the machine-made sand prepared by the method has poor particle circularity, the product quality needs to be improved, and in the field processing process, dust is serious, and the environmental load is large. Aiming at the defects, the application especially provides a machine-made sand production process.

Disclosure of Invention

In order to solve the problems, the invention discloses a machine-made sand production process, which comprises the following steps:

1) conveying the rock blocks to a jaw crusher for primary crushing to obtain coarse crushed products;

2) conveying the coarse crushed product into a reaction crusher through a belt conveyor, and further crushing the coarse crushed product through the reaction crusher to obtain a medium crushed product;

3) sending the medium crushed product into a vertical mill, further crushing the medium crushed product through the vertical mill to obtain a fine crushed product, carrying out three-stage screening on the fine crushed product to obtain three-stage screened products a, b and c, collecting oversize materials which cannot penetrate through a first-stage screen again, sending the oversize materials into the vertical mill again, and carrying out secondary crushing on the oversize materials;

4) sending the screened product obtained in the step 3) into a sand making machine for making sand, and respectively sending a, b and c into the sand making machine for making sand to obtain products a1, b1 and c 1;

5) respectively feeding the products obtained in the step 4) into a powder selecting machine, connecting the powder selecting machine with a powder removing mechanism, and removing fine powder with the particle size of less than 0.08mm from the a1, the b1 and the c1 through the powder selecting machine to obtain products a2, b2 and c 2;

6) and mixing the a2, the b2 and the c2 according to a certain proportion, thereby adjusting the fineness modulus and the gradation of the machine-made sand to obtain a finished product.

In the step 3), the particle diameter of a is larger than the particle diameter of b and larger than the particle diameter of c.

The powder removing mechanism in the step 5) comprises a cyclone cylinder and an exhaust fan, the powder concentrator is connected with the cyclone cylinder, and the cyclone cylinder is connected with the exhaust fan.

In the step 5), the grain diameter of a2 which is more than 2.4mm and less than 4.75mm, the grain diameter of b2 which is more than 0.8mm and less than or equal to 2.4mm, and the grain diameter of c2 which is more than 0.08mm and less than or equal to 0.8 mm.

By adopting the technical scheme, the invention has the beneficial effects that:

1. a vertical mill is added into crushing equipment, raw materials are crushed in the vertical mill under the action of extrusion and shearing force, and the circularity of crushed particles is greatly improved;

2. the powder separator is connected with the powder removing mechanism, the machine-made sand is removed by the powder removing mechanism, fine powder is screened out, dust can be reduced, and the field working environment is improved.

Detailed Description

The invention discloses a machine-made sand production process, which comprises the following steps:

1) conveying the rock blocks to a jaw crusher for primary crushing to obtain coarse crushed products;

2) conveying the coarse crushed product into a reaction crusher through a belt conveyor, and further crushing the coarse crushed product through the reaction crusher to obtain a medium crushed product;

3) sending the medium crushed product into a vertical mill, further crushing the medium crushed product through the vertical mill to obtain a fine crushed product, carrying out three-stage screening on the fine crushed product to obtain three-stage screened products a, b and c, collecting oversize materials which cannot penetrate through a first-stage screen again, sending the oversize materials into the vertical mill again, and carrying out secondary crushing on the oversize materials;

4) sending the screened product obtained in the step 3) into a sand making machine for making sand, and respectively sending a, b and c into the sand making machine for making sand to obtain products a1, b1 and c 1;

5) respectively feeding the products obtained in the step 4) into a powder selecting machine, connecting the powder selecting machine with a powder removing mechanism, and removing fine powder with the particle size of less than 0.08mm from the a1, the b1 and the c1 through the powder selecting machine to obtain products a2, b2 and c 2;

6) and mixing the a2, the b2 and the c2 according to a certain proportion, thereby adjusting the fineness modulus and the gradation of the machine-made sand to obtain a finished product.

In the step 3), the particle diameter of a is larger than the particle diameter of b and larger than the particle diameter of c.

The powder removing mechanism in the step 5) comprises a cyclone cylinder and an exhaust fan, the powder concentrator is connected with the cyclone cylinder, and the cyclone cylinder is connected with the exhaust fan.

In the step 5), the grain diameter of a2 which is more than 2.4mm and less than 4.75mm, the grain diameter of b2 which is more than 0.8mm and less than or equal to 2.4mm, and the grain diameter of c2 which is more than 0.08mm and less than or equal to 0.8 mm.

Finally, it should be noted that: the above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention; thus, while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted; all such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and protected by the following claims.