CN-118874914-B - Preparation method of environment-friendly cementing material suitable for cementing coal blocks

CN118874914BCN 118874914 BCN118874914 BCN 118874914BCN-118874914-B

Abstract

The invention relates to the technical field of cemented filling bodies and discloses a preparation method of an environment-friendly cementing material suitable for cementing coal blocks, which comprises 1) placing coal gangue in a cleaning machine to form clean materials, wherein the cleaning machine comprises a machine body, a cleaning cavity is arranged in the machine body, a feed inlet is arranged at the top of the cleaning cavity, a discharge plate swinging up and down is arranged at the bottom of the cleaning cavity, a liquid outlet is arranged at the bottom of the cleaning cavity, a filter screen is arranged on the liquid outlet, cleaning liquid enters the cleaning cavity through the liquid inlet on the machine body, the cleaning liquid washes the coal gangue in the cleaning cavity and carries impurities on the surface of the coal gangue to flow out through the liquid outlet, the discharge plate is swung to open the discharge outlet, 2) crushing the clean materials to form crushed materials, 3) sieving the crushed materials by a sieving machine and drying the crushed materials to obtain fine material gangue, 4) loading the fine material gangue, slag, gypsum, fly ash, clinker and steel slag powder into a ball mill to form powder, and 5) uniformly mixing the powder to form the environment-friendly cementing material.

Inventors

ZHANG MING
HAN GUIBAO
MA BIN
WANG XIAOFENG
FU YANAN

Assignees

北京煤岩深控科技有限公司

Dates

Publication Date: 20260508
Application Date: 20240710

Claims (5)

1. The preparation method of the environment-friendly cementing material suitable for cementing coal blocks is characterized by comprising the following preparation steps: 1) The coal gangue cleaning machine comprises a machine body, wherein a cleaning cavity is formed in the machine body, a feeding hole is formed in the top of the cleaning cavity, a discharging plate which swings up and down is arranged at the bottom of the cleaning cavity, the discharging plate is covered on the discharging hole, a liquid outlet is formed in the bottom of the cleaning cavity, and a filter screen is arranged on the liquid outlet; The cleaning liquid enters the cleaning cavity through a liquid inlet on the machine body, the cleaning liquid washes the gangue in the cleaning cavity and carries impurities on the surface of the gangue to flow out through a liquid outlet, then the discharging plate is swung to open the discharging hole, and the clean material is discharged downwards in a rolling way through the discharging hole; 2) Crushing the clean material to form crushed materials; 3) Screening the crushed materials by a screening machine, and drying to obtain fine gangue; 4) According to a set proportion, the fine gangue, slag, gypsum, fly ash, clinker and steel slag powder are put into a ball mill for ball milling to form powder; 5) Uniformly mixing the powder to form the environment-friendly cementing material; The middle part of the cleaning cavity is provided with a vibrating rod which reciprocates up and down, the bottom of the vibrating rod extends downwards to the lower part of the cleaning cavity to form a bottom section, a plurality of vibrating discs which radially outwards expand are formed on the periphery of the bottom section, the vibrating discs are vertically arranged at intervals along the height direction of the bottom section, annular intervals are formed between the periphery of the vibrating discs and the side wall of the cleaning cavity, and a vibrating surface is formed on the top of the vibrating discs; In the step 1), in the process of flushing the gangue by the cleaning liquid, the vibrating rod vibrates in a reciprocating way up and down, the gangue on the vibrating surface vibrates up and down, and adjacent gangue rubs with each other, so that impurities on the surface of the gangue are promoted to fall off; The vibration surface is obliquely arranged in a downward extending manner along the direction from inside to outside in the radial direction of the vibration disk; In the step 1), when the discharge hole is in an open state, the clean material on the vibration surface rolls downwards along the inclined direction of the vibration surface; The cleaning cavity is internally provided with a surrounding inner peripheral wall, a plurality of outer water spraying heads are arranged on the inner peripheral wall, the outer water spraying heads are arranged at intervals along the circumferential direction of the inner peripheral wall to form outer water spraying rings, and the outer water spraying rings are arranged at intervals along the height direction of the inner peripheral wall; in the step 1), the outer sprinkler head sprays the cleaning liquid towards the middle part of the cleaning cavity; A plurality of inner water spray holes are formed on the periphery of the vibrating rod, the inner water spray holes are arranged at intervals along the circumferential direction of the vibrating rod to form inner water spray rings, and the inner water spray rings are arranged at intervals along the height direction of the vibrating rod; In step 1), the inner water spray holes spray the cleaning liquid toward the inner peripheral wall.
2. The method for preparing the environment-friendly cementing material suitable for coal briquette cementing according to claim 1, wherein in the step 3), the crushed materials are screened to form coarse materials with a particle size larger than a set particle size and fine materials with a particle size smaller than the set particle size, the fine materials are dried by a drying oven to form fine material gangue, and the set particle size is 10mm.
3. The method for preparing the environment-friendly cementing material suitable for cementing coal blocks according to claim 2, wherein the drying box comprises a box body, a drying cavity is formed in the box body, a heat conducting disc made of metal is arranged in the drying cavity, a disc cavity is arranged in the heat conducting disc, an air outlet is arranged in the drying cavity, and the air outlet is arranged towards the disc cavity; In the step 3), the fine materials are placed in a tray cavity, and the air outlet is used for drying the fine materials through hot air until the fine materials are completely dried, so that fine material gangue is formed.
4. The preparation method of the environment-friendly cementing material suitable for cementing coal blocks, as claimed in claim 3, is characterized in that two sides of the bottom of the drying cavity are respectively provided with a push plate which moves towards each other or away from each other, the push plates are connected with a moving rod which moves back and forth, the push plates are transversely arranged in the drying cavity, the bottoms of the push plates are propped against the bottoms of the drying cavity, the two push plates are respectively provided with oppositely arranged front push surfaces, a plate interval is formed between the two front push surfaces, and the front push surfaces are obliquely arranged inwards along the direction from bottom to top; in the step 3), when the two pushing plates move towards each other in the process of drying the fine materials, the interval between the plates is reduced, and the fine materials on the bottoms of the interval between the plates move upwards along the extending direction of the front pushing surface.
5. The method for preparing the environment-friendly cementing material suitable for cementing coal blocks according to claim 4, wherein two pushing plates are respectively provided with a back pushing surface which is arranged in a back-to-back way, the back pushing surfaces are arranged in an inward inclined extending way along the direction from bottom to top, and a surface interval is formed between the back pushing surfaces and the side surfaces of the drying cavity; In the step 3), when the two pushing plates move away from each other in the process of drying the fine materials, the surface interval is reduced, and the fine materials on the bottom of the surface interval move upwards along the extending direction of the backward pushing surface.

Description

Preparation method of environment-friendly cementing material suitable for cementing coal blocks Technical Field The invention relates to the technical field of cementing filling bodies, in particular to a preparation method of an environment-friendly cementing material suitable for cementing coal blocks. Background The coal blocks are used as the aggregate of the cemented filling body, have great influence on the strength of the filling body, and generally the hardness of the aggregate and the strength of the cemented filling body show positive correlation. The strength of raw coal of one of the main research objects of the project can reach 25-35MPa, namely the hardness f value is 2.5-3.5, and the aggregate used by conventional concrete, such as limestone, granite and the like, can reach more than f 8. Therefore, the coal briquette as the filler aggregate has no advantage, and the cementing material with high strength and strong binding force is matched with the coal briquette to prepare the cementing material meeting the support requirement. Disclosure of Invention The invention aims to provide a preparation method of an environment-friendly cementing material suitable for cementing coal blocks, and aims to solve the problem that in the prior art, when the coal blocks are used as aggregate of a cemented filling body, the strength of the cemented filling body is difficult to ensure. The invention discloses a preparation method of an environment-friendly cementing material suitable for cementing coal blocks, which comprises the following preparation steps: 1) The coal gangue cleaning machine comprises a machine body, wherein a cleaning cavity is formed in the machine body, a feeding hole is formed in the top of the cleaning cavity, a discharging plate which swings up and down is arranged at the bottom of the cleaning cavity, the discharging plate is covered on the discharging hole, a liquid outlet is formed in the bottom of the cleaning cavity, and a filter screen is arranged on the liquid outlet; The cleaning liquid enters the cleaning cavity through a liquid inlet on the machine body, the cleaning liquid washes the gangue in the cleaning cavity and carries impurities on the surface of the gangue to flow out through a liquid outlet, then the discharging plate is swung to open the discharging hole, and the clean material is discharged downwards in a rolling way through the discharging hole; 2) Crushing the clean material to form crushed materials; 3) Screening the crushed materials by a screening machine, and drying to obtain fine gangue; 4) Loading the fine gangue, slag, gypsum, fly ash, clinker and steel slag powder into a ball mill for ball milling to form powder; 5) And uniformly mixing the powder to form the environment-friendly cementing material. Optionally, a vibrating rod which vibrates up and down in a reciprocating manner is arranged in the middle of the cleaning cavity, the bottom of the vibrating rod extends downwards to the lower part of the cleaning cavity to form a bottom section, a plurality of vibrating discs which expand outwards in a radial direction are formed on the periphery of the bottom section, the vibrating discs are arranged at intervals up and down along the height direction of the bottom section, annular intervals are formed between the periphery of the vibrating discs and the side wall of the cleaning cavity, and a vibrating surface is formed on the top of the vibrating discs; In the step 1), in the process of flushing the gangue by the cleaning liquid, the vibrating rod vibrates up and down in a reciprocating manner, the gangue on the vibrating surface vibrates up and down, and adjacent gangue rubs with each other, so that impurities on the surface of the gangue are promoted to fall off. Optionally, the vibration surface is arranged in a downward inclined extending way along the direction from the inner side to the outer side of the radial direction of the vibration disk; in the step 1), when the discharge port is in an open state, the clean material on the vibration surface rolls downwards along the inclined direction of the vibration surface. Optionally, the cleaning cavity is provided with a surrounding inner peripheral wall, the inner peripheral wall is provided with a plurality of outer water spraying heads, the outer water spraying heads are arranged at intervals along the circumferential direction of the inner peripheral wall to form outer water spraying rings, and the outer water spraying rings are arranged at intervals along the height direction of the inner peripheral wall; In the step 1), the outer sprinkler head sprays the cleaning liquid toward the middle of the cleaning chamber. Optionally, a plurality of inner water spray holes are formed on the periphery of the vibrating rod, the inner water spray holes are arranged at intervals along the circumferential direction of the vibrating rod to form inner water spray rings, and the inner water spray rings are arrang