CN113996416A - Limestone soil removal system and process - Google Patents

Limestone soil removal system and process Download PDF

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Publication number
CN113996416A
CN113996416A CN202110862730.2A CN202110862730A CN113996416A CN 113996416 A CN113996416 A CN 113996416A CN 202110862730 A CN202110862730 A CN 202110862730A CN 113996416 A CN113996416 A CN 113996416A
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China
Prior art keywords
soil removal
crusher
finished product
limestone
discharge port
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CN202110862730.2A
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Chinese (zh)
Inventor
段俊刚
秦福在
王福春
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Qingshuihe Mengxi Building Materials Co ltd
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Qingshuihe Mengxi Building Materials Co ltd
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Priority to CN202110862730.2A priority Critical patent/CN113996416A/en
Publication of CN113996416A publication Critical patent/CN113996416A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/02—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

The invention discloses a limestone soil removal system and a process, 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 then 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 and process
The technical field is as follows:
the invention relates to the field of production of building materials, in particular to a limestone soil removal system and a limestone soil removal process.
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 invention content is as follows:
the first purpose of the invention is to provide a limestone soil removal system which can effectively remove harmful components in a limestone interlayer.
The second purpose of the invention is to provide a limestone soil removal process for effectively removing harmful ingredients in a limestone interlayer.
The invention 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 invention 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 material mixing conveyor belt 11 is arranged above the feed opening of the vibration separating screen 6, the vibration separating screen 6 adopts a circular vibrating screen, the screening capacity is 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 third layer is 5mm, the three layers of screens are selected to mainly improve the screening rate and can reach more than 95%, 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 (7)

1.石灰石除土系统，其特征在于，其包括原料料仓，振动给料机、棒条筛、成品破碎机、除土破碎机、振动分选筛、成品库、渣土库；在所述原料料仓的出料口上设有所述振动给料机，在所述振动给料机的卸料口下方设有所述棒条筛，所述棒条筛的筛上物出料口与所述成品破碎机的进料口连通；所述成品破碎机的出料口下方设有成品输送带，所述成品输送带的卸料口置于所述成品库内；所述棒条筛的筛下物出料口下方设有初筛输送带，所述初筛输送带的卸料口置于所述除土破碎机的进料口上方，所述除土破碎机的出料口下方设有混料输送带；所述混料输送带的卸料口置于所述振动分选筛的进料口上方，所述振动分选筛的筛上物出料口下方设有除土料输送带，所述除土料输送带的卸料口置于所述成品输送带的上方；所述振动分选筛的筛下物出料口下方设有渣土输送带，所述渣土输送带的卸料口置于所述渣土库内。1. limestone soil removal system, is characterized in that, it comprises raw material silo, vibrating feeder, bar screen, finished product crusher, soil removal crusher, vibrating sorting screen, finished product warehouse, muck storage; The vibrating feeder is provided on the discharge port of the raw material silo, and the bar screen is provided below the discharge port of the vibrating feeder. The feed port of the finished product crusher is connected; a finished product conveyor belt is arranged under the discharge port of the finished product crusher, and the discharge port of the finished product conveyor belt is placed in the finished product warehouse; the screen of the bar screen There is a preliminary screening conveyor belt below the discharge port of the lower material, the discharge port of the preliminary screening conveyor belt is placed above the feed port of the soil removal crusher, and the discharge port of the soil removal crusher is provided with Mixing conveyor belt; the discharge port of the mixing conveyor belt is placed above the feeding port of the vibrating sorting screen, and a soil-removing material conveyor belt is provided below the discharging port of the vibrating sorting screen , the discharge port of the soil removal material conveyor belt is placed above the finished product conveyor belt; there is a slag conveyor belt below the underscreen discharge port of the vibrating sorting screen, and the slag soil conveyor belt is The discharge port is placed in the muck storage. 2.根据权利要求1所述的石灰石除土系统，其特征在于，所述振动给料机采用变频调速，给料量600～1400吨/小时。2 . The limestone soil removal system according to claim 1 , wherein the vibrating feeder adopts frequency conversion speed regulation, and the feeding amount is 600-1400 tons/hour. 3 . 3.根据权利要求1所述的石灰石除土系统，其特征在于，所述棒条筛采用三段筛分，有效长度6米，棒条缝隙80～120mm可调，筛分能力1500吨/小时，筛上大于120mm物料入所述成品破碎机进入下部工艺，筛下≤120mm物料入所述除土破碎机。3. The limestone soil removal system according to claim 1, characterized in that, the bar screen adopts three-stage screening, the effective length is 6 meters, the bar gap is adjustable from 80 to 120 mm, and the screening capacity is 1500 tons/hour , the material larger than 120mm on the sieve enters the finished product crusher and enters the lower process, and the material under the sieve ≤120mm enters the soil removal crusher. 4.根据权利要求1所述的石灰石除土系统，其特征在于，所述成品破碎机破碎能力600吨/小时，入料粒度≤200mm，出料粒度≤30mm。4 . The limestone soil removal system according to claim 1 , wherein the crushing capacity of the finished product crusher is 600 tons/hour, the feeding particle size is less than or equal to 200 mm, and the discharging particle size is less than or equal to 30 mm. 5 . 5.根据权利要求1所述的石灰石除土系统，其特征在于，所述振动分选筛选用圆振筛，筛分能力800吨/小时，圆振筛采用三层筛网，第一层孔径40mm，第二层20mm，第三层5mm，筛上干净物料经所述除土料输送带入所述成品库内；第三层筛网下≤5mm物料经所述渣土输送带入所述渣土库内。5. The limestone soil removal system according to claim 1, wherein the circular vibrating screen is used for the vibration sorting and screening, and the screening capacity is 800 tons/hour. 40mm, the second layer is 20mm, and the third layer is 5mm. The clean materials on the screen are brought into the finished product warehouse through the soil removal material conveyor; the materials ≤5mm under the third layer of screen mesh are brought into the product warehouse through the muck conveyor. Inside the dump. 6.根据权利要求1至5任一所述的石灰石除土系统，其特征在于，其还包括分料三通，在所述初筛输送带的卸料口置于所述分料三通的进料口上方，所述分料三通的一个出料口与所述除土破碎机的进料口连通；所述分料三通的另一个出料口置于所述混料输送带上方；在所述分料三通的两个出料口上均设有闸板阀。6. The limestone soil removal system according to any one of claims 1 to 5, characterized in that, it further comprises a material distribution tee, and the discharge port of the primary screening conveyor belt is placed on the side of the material distribution tee. Above the feed port, one discharge port of the material distributing tee is communicated with the feed port of the soil removal crusher; the other discharge port of the material distributing tee is placed above the mixing conveyor belt ; A gate valve is provided on the two discharge ports of the material distribution tee. 7.使用上述权利要求中石灰石除土系统的石灰石除土工艺，其特征在于：其包括如下步骤，7. use the limestone soil removal technology of limestone soil removal system in the above claim, it is characterized in that: it comprises the steps, 步骤1，一次筛分，将混合物料使用棒条筛进行一次筛分，Step 1, sieve once, use a bar sieve to sieve the mixed material once, 步骤2，破碎，将步骤1中分选出的大于120mm的物料入主破碎机后入成品库；将步骤1中分选出的小于等于120mm的物料入除土破碎机；Step 2, crushing, put the materials larger than 120mm selected in step 1 into the main crusher and then into the finished product warehouse; put the materials less than or equal to 120mm selected in step 1 into the soil removal crusher; 步骤3，二次筛分，将除土破碎机破碎的混合物料使用振动分选筛进行二次筛分，二次筛分后大于5mm的物料入成品库，二次筛分后小于等于5mm的物料入渣土仓。Step 3, secondary screening, the mixed materials crushed by the soil removal crusher are subjected to secondary screening using a vibrating sorting screen. The material goes into the muck bin.
CN202110862730.2A 2021-07-29 2021-07-29 Limestone soil removal system and process Pending CN113996416A (en)

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Application Number Priority Date Filing Date Title
CN202110862730.2A CN113996416A (en) 2021-07-29 2021-07-29 Limestone soil removal system and process

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Application Number Priority Date Filing Date Title
CN202110862730.2A CN113996416A (en) 2021-07-29 2021-07-29 Limestone soil removal system and process

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007261870A (en) * 2006-03-28 2007-10-11 Earth Technica:Kk Concrete recycled aggregate production system
CN102942321A (en) * 2012-11-26 2013-02-27 山东水泥厂有限公司 Ore muck separation system
CN211887336U (en) * 2020-03-18 2020-11-10 天瑞集团萧县水泥有限公司 Broken sieving mechanism of mine barren rock
CN112958254A (en) * 2021-02-23 2021-06-15 山东博研粉体技术装备有限公司 Aggregate production system
CN215465029U (en) * 2021-07-29 2022-01-11 清水河蒙西建材有限公司 Limestone soil removal system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007261870A (en) * 2006-03-28 2007-10-11 Earth Technica:Kk Concrete recycled aggregate production system
CN102942321A (en) * 2012-11-26 2013-02-27 山东水泥厂有限公司 Ore muck separation system
CN211887336U (en) * 2020-03-18 2020-11-10 天瑞集团萧县水泥有限公司 Broken sieving mechanism of mine barren rock
CN112958254A (en) * 2021-02-23 2021-06-15 山东博研粉体技术装备有限公司 Aggregate production system
CN215465029U (en) * 2021-07-29 2022-01-11 清水河蒙西建材有限公司 Limestone soil removal system

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Application publication date: 20220201