CN215465029U

CN215465029U - Limestone soil removal system

Info

Publication number: CN215465029U
Application number: CN202121752261.0U
Authority: CN
Inventors: 段俊刚; 秦福在; 王福春
Original assignee: Qingshuihe Mengxi Building Materials Co ltd
Current assignee: Qingshuihe Mengxi Building Materials Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-01-11
Anticipated expiration: 2031-07-29

Abstract

The utility model discloses a limestone soil removal system which comprises a raw material bin, a vibrating feeder, a bar screen, a finished product crusher, a soil removal crusher, a vibrating sorting screen, a finished product warehouse and a muck warehouse, wherein a limestone mineral aggregate is mechanically treated, and is subjected to the working procedures of primary screening, crushing, secondary screening and the like, soil blocks, interlayer stones and other soil layers in the limestone mineral aggregate are crushed and screened, the soil blocks and the interlayer stones in the limestone mineral aggregate are screened out, the soil removal efficiency is over 99 percent, the CaO content in the limestone is improved by about 4 percent, and the cost of the limestone is reduced. The limestone obtained after processing can be used as a cement clinker raw material or used in concrete as an aggregate, and the production cost of the concrete aggregate can be reduced.

Description

Limestone soil removal system

The technical field is as follows:

the utility model relates to the field of building material production, in particular to a limestone soil removal system.

Background art:

limestone is an important building material, and is generally used as one of main raw materials of cement and aggregate of concrete.

The raw ore obtained by mining the limestone contains a large amount of soil blocks, interlayer stones and other soil interlayers, and in the process of firing the cement clinker, the soil interlayers in the limestone influence the content of the limestone cao of the cement clinker, so that the quality of the cement product cannot be effectively controlled, therefore, the soil interlayers need to be peeled off in a large area in the process of mining the limestone, the batching requirement cannot be met, 50% of limestone needs to be purchased to meet the production batching requirement, and the production cost of the cement clinker is very high. The inclusion of the soil in the limestone can adversely affect the strength, workability and durability of the concrete.

The utility model has the following contents:

the utility model aims to provide a limestone soil removal system for effectively removing harmful ingredients in a limestone interlayer.

The utility model is implemented by the following technical scheme: the limestone soil removal system comprises a raw material bin, a vibrating feeder, a bar screen, a finished product crusher, a soil removal crusher, a vibrating sorting screen, a finished product warehouse and a muck warehouse; the vibrating feeder is arranged on a discharge port of the raw material bin, the bar screen is arranged below a discharge port of the vibrating feeder, and an oversize material discharge port of the bar screen is communicated with a feed port of the finished product crusher; a finished product conveying belt is arranged below a discharge port of the finished product crusher, and a discharge port of the finished product conveying belt is arranged in the finished product warehouse; a primary screening conveyer belt is arranged below a screen underflow discharge port of the bar screen, a discharge port of the primary screening conveyer belt is arranged above a feed port of the soil removing crusher, and a mixing conveyer belt is arranged below a discharge port of the soil removing crusher; the discharge opening of the mixing conveyer belt is arranged above the feed opening of the vibrating separating screen, the soil removing conveyer belt is arranged below the oversize material discharge opening of the vibrating separating screen, and the discharge opening of the soil removing conveyer belt is arranged above the finished product conveyer belt; and a residue soil conveying belt is arranged below a screen underflow discharge port of the vibration separating screen, and a discharge port of the residue soil conveying belt is arranged in the residue soil warehouse.

Preferably, the vibration feeder adopts variable frequency speed regulation, the feeding is stable and controllable, and the feeding amount is 600-1400 tons/hour.

Preferably, the bar screen adopts three-section screening, the effective length is 6 meters, the bar gap is 80-120 mm adjustable, the effective screening capacity is 1500 tons/h according to the raw material granularity adjustment, the net screening rate is more than 99%, the material passes through the bar screen, the material larger than 120mm on the screen enters the finished product crusher, the material smaller than or equal to 120mm below the screen enters the soil removal crusher, the soil removal crusher cleans up soil on the surface of the material, and simultaneously, the soil blocks and the interlayer stones are softer than limestone, so that the soil blocks and the interlayer stones are thoroughly crushed in the crushing process, and the granularity is not more than 5 mm.

Preferably, the crushing capacity of the finished product crusher is 600 tons/hour, the feed granularity is less than or equal to 200mm, and the discharge granularity is less than or equal to 30 mm.

Preferably, the circular vibrating screen is a circular vibrating screen with the screening capacity of 800 tons/hour, the circular vibrating screen adopts three layers of screens, the aperture of the first layer is 40mm, the aperture of the second layer is 20mm, the aperture of the third layer is 5mm, the screening rate is mainly improved by selecting three layers of screens, the screening rate can reach more than 95%, and the cleaned materials on the screens are conveyed into the finished product warehouse through the soil removing materials; and materials which are less than or equal to 5mm below the third layer of screen mesh are conveyed by the muck and are brought into the muck reservoir, and the materials in the muck reservoir can be used as backfill materials.

Preferably, the device also comprises a material distributing tee joint, wherein a discharge opening of the primary screening conveyer belt is arranged above a feed opening of the material distributing tee joint, and a discharge opening of the material distributing tee joint is communicated with the feed opening of the soil removing crusher; the other discharge port of the material distributing tee joint is arranged above the material mixing conveying belt; gate valves are arranged on two discharge ports of the material distributing tee.

A limestone soil removal process comprises the following steps,

step 1, primary screening, wherein the mixed material is subjected to primary screening by using a bar screen,

step 2, crushing, namely putting the materials with the size of more than 120mm selected in the step 1 into a main crusher and then putting the materials into a finished product warehouse; putting the materials which are selected in the step 1 and are less than or equal to 120mm into a soil removal crusher;

and 3, secondary screening, namely performing secondary screening on the mixed material crushed by the soil removal crusher by using a vibration screening sieve, feeding the material with the size of more than 5mm after the secondary screening into a finished product warehouse, and feeding the material with the size of less than or equal to 5mm after the secondary screening into a residue soil warehouse.

The utility model has the advantages that: compared with the prior art, the limestone soil removal system has reliable and stable operation. The limestone mineral aggregate is mechanically treated, and is subjected to the procedures of primary screening, crushing, secondary screening and the like, soil blocks, interlayer stones and other soil layers in the limestone mineral aggregate are crushed and screened, the soil blocks and the interlayer stones in the limestone mineral aggregate are screened, the soil removal efficiency is over 99 percent, the CaO content in the limestone is improved by about 4 percent, the main index CaO content of the limestone is over 49 percent, and meanwhile, the cost of the limestone is reduced. The limestone obtained after processing can be used as a cement clinker raw material or used in concrete as an aggregate, and the production cost of the concrete aggregate can be reduced. The alkali content of the cement clinker obtained by firing the processed limestone is reduced by 0.2, can reach below 0.6 and reach a low alkali level, and belongs to domestic high-quality clinker, and the 28-day compressive strength of the cement clinker is improved by 5MPa and can reach 58MPa, thereby reaching the advanced level of the industry. The processed limestone is used as concrete aggregate, the adaptability of the concrete admixture is improved, the use amount of the admixture is less, and the cost is reduced; in addition, the strength of the concrete can be improved.

Description of the drawings:

fig. 1 is a schematic diagram of system connection in embodiment 1.

FIG. 2 is a schematic diagram of system connection in example 2.

Raw material bin 1, vibrating feeder 2, bar screen 3, finished product crusher 4, soil removal crusher 5, vibrating separating screen 6, finished product warehouse 7, muck warehouse 8, finished product conveyer belt 9, primary screen conveyer belt 10, mixing conveyer belt 11, soil removal conveyer belt 12, muck conveyer belt 13, separating tee 14 and gate valve 15

The specific implementation mode is as follows:

example 1: as shown in fig. 1, the limestone soil removal system comprises a raw material bin 1, a vibrating feeder 2, a bar screen 3, a finished product crusher 4, a soil removal crusher 5, a vibrating separating screen 6, a finished product warehouse 7 and a residue soil warehouse 8; a discharge port of the raw material bin 1 is provided with a vibrating feeder 2, the vibrating feeder 2 adopts variable frequency speed regulation, the feeding is stable and controllable, and the feeding amount is 600-1400 tons/hour; a bar screen 3 is arranged below a discharge opening of the vibrating feeder 2, the bar screen 3 is screened in three sections, the effective length is 6 meters, the bar gap is 80-120 mm adjustable, the effective screening capacity is 1500 tons/h according to the granularity adjustment of raw materials, and the net screening rate is more than 99%; the oversize material outlet of the bar screen 3 is communicated with the feed inlet of the finished product crusher 4, the material passes through the bar screen 3, the oversize material larger than 120mm enters the finished product crusher 4, the crushing capacity of the finished product crusher 4 is 600 tons/hour, the feed particle size is less than or equal to 200mm, and the discharge particle size is less than or equal to 30 mm; a finished product conveying belt 9 is arranged below a discharge port of the finished product crusher 4, and a discharge port of the finished product conveying belt 9 is arranged in the finished product warehouse 7; a primary screen conveyer belt 10 is arranged below a screen underflow discharge port of the bar screen 3, a discharge port of the primary screen conveyer belt 10 is arranged above a feed port of the soil removal crusher 5, materials pass through the bar screen 3, the materials with the screen underflow of less than or equal to 120mm enter the soil removal crusher 5, the soil removal crusher 5 cleans soil on the surface of the materials, and meanwhile, the soil blocks and the interlayer stones are thoroughly crushed in the crushing process because the soil blocks and the interlayer stones are softer than limestone, and the particle size is not more than 5 mm; a mixing conveyer belt 11 is arranged below a discharge port of the soil removing crusher 5; the discharge opening of the mixing conveyer belt 11 is arranged above the feed opening of the vibrating separating screen 6,

the circular vibrating screen 6 is a circular vibrating screen with the screening capacity of 800 tons/hour, the circular vibrating screen adopts three layers of screens, the aperture of the first layer is 40mm, the aperture of the second layer is 20mm, the aperture of the third layer is 5mm, the screening rate is mainly improved by selecting three layers of screens, the screening rate can reach more than 95 percent, and the screened clean materials are conveyed into a finished product warehouse through soil removal materials;

a soil removing material conveying belt 12 is arranged below a discharge port of oversize materials of the circular vibrating screen, a discharge port of the soil removing material conveying belt 12 is arranged above a finished product conveying belt 9, and oversize clean materials of the vibrating separating screen 6 are conveyed into a finished product warehouse 7 through the soil removing material conveying belt 12; a residue soil conveyer belt 13 is arranged below a screen underflow discharge port of the vibration separating screen 6, a discharge port of the residue soil conveyer belt 13 is arranged in the residue soil warehouse 8, a material which is less than or equal to 5mm below a third layer screen mesh of the circular vibration screen enters the residue soil warehouse 8 through the residue soil conveyer belt 13, and the material in the residue soil warehouse 8 can be used as a backfill material.

Example 2: as shown in fig. 2, the limestone soil removal system comprises a raw material bin 1, a vibrating feeder 2, a bar screen 3, a finished product crusher 4, a soil removal crusher 5, a vibrating separating screen 6, a finished product warehouse 7 and a residue soil warehouse 8; the integral structure of the primary screening conveyor belt is the same as that of the embodiment 1, and the primary screening conveyor belt further comprises a material distributing tee 14, wherein a discharge port of the primary screening conveyor belt 10 is arranged above a feed port of the material distributing tee 14, and a discharge port of the material distributing tee 14 is communicated with a feed port of the soil removal crusher 5; the other discharge port of the material distributing tee joint 14 is arranged above the material mixing conveyer belt 11; the gate valves 15 are arranged on the two discharge ports of the material distributing tee 14, process adjustment can be carried out according to the size of the undersize materials of the bar screen 3 in actual production, the soil removal crusher 5 is stopped, the vibration separating screen 6 is directly used for separating the undersize materials of the bar screen 3, the energy consumption of a system is reduced, the soil removal time is shortened, and the working efficiency is improved.

Example 3: a limestone soil removal process comprises the following steps,

step 1, primary screening, wherein the mixed material is subjected to primary screening by using a bar screen 3,

step 2, crushing, namely putting the material which is larger than 120mm and is separated by the bar screen 3 in the step 1 into a finished product crusher 4, crushing and putting the crushed material into a finished product warehouse; putting the material which is separated by the bar screen 3 in the step 1 and is less than or equal to 120mm into a soil removal crusher 5 for crushing;

and 3, secondary screening, namely performing secondary screening on the mixed material crushed by the soil removing crusher 5 by using a vibration screening sieve 6, performing secondary screening by using the vibration screening sieve 6 to obtain a material with the thickness of more than 5mm, and putting the material with the thickness of less than or equal to 5mm into a finished product warehouse 7, and performing secondary screening by using the vibration screening sieve 6 to obtain a material with the thickness of less than or equal to 5mm, and putting the material into a muck warehouse 8.

Claims

1. The limestone soil removal system is characterized by comprising a raw material bin, a vibrating feeder, a bar screen, a finished product crusher, a soil removal crusher, a vibrating sorting screen, a finished product warehouse and a muck warehouse; the vibrating feeder is arranged on a discharge port of the raw material bin, the bar screen is arranged below a discharge port of the vibrating feeder, and an oversize material discharge port of the bar screen is communicated with a feed port of the finished product crusher; a finished product conveying belt is arranged below a discharge port of the finished product crusher, and a discharge port of the finished product conveying belt is arranged in the finished product warehouse; a primary screening conveyer belt is arranged below a screen underflow discharge port of the bar screen, a discharge port of the primary screening conveyer belt is arranged above a feed port of the soil removing crusher, and a mixing conveyer belt is arranged below a discharge port of the soil removing crusher; the discharge opening of the mixing conveyer belt is arranged above the feed opening of the vibrating separating screen, the soil removing conveyer belt is arranged below the oversize material discharge opening of the vibrating separating screen, and the discharge opening of the soil removing conveyer belt is arranged above the finished product conveyer belt; and a residue soil conveying belt is arranged below a screen underflow discharge port of the vibration separating screen, and a discharge port of the residue soil conveying belt is arranged in the residue soil warehouse.

2. The limestone soil removal system according to claim 1, wherein the vibration feeder adopts variable frequency speed regulation, and the feeding amount is 600-1400 tons/hour.

3. The limestone soil removal system according to claim 1, wherein the bar screen adopts three-stage screening, the effective length is 6 meters, the bar gap is 80-120 mm adjustable, the screening capacity is 1500 tons/hour, the material with the size larger than 120mm on the screen enters the finished product crusher and enters the lower process, and the material with the size smaller than or equal to 120mm below the screen enters the soil removal crusher.

4. The limestone soil removal system as claimed in claim 1, wherein the crushing capacity of the finished product crusher is 600 tons/hour, the particle size of the fed material is less than or equal to 200mm, and the particle size of the discharged material is less than or equal to 30 mm.

5. The limestone soil removal system according to claim 1, wherein the vibration separation sieve is a circular vibrating sieve with a sieving capacity of 800 tons/hour, the circular vibrating sieve is a three-layer sieve with a first layer of apertures of 40mm, a second layer of apertures of 20mm and a third layer of apertures of 5mm, and the sieved clean materials are conveyed into the finished product warehouse by the soil removal material; and materials which are less than or equal to 5mm below the third layer of screen mesh are conveyed by the muck and are brought into the muck reservoir.

6. The limestone soil removal system according to any one of claims 1 to 5, further comprising a material distribution tee, wherein a discharge port of the prescreening conveyor belt is arranged above a feed port of the material distribution tee, and a discharge port of the material distribution tee is communicated with a feed port of the soil removal crusher; the other discharge port of the material distributing tee joint is arranged above the material mixing conveying belt; gate valves are arranged on two discharge ports of the material distributing tee.