Constant-low-splitting-based non-pressure three-product and slime dense medium separation improved process

A three-product and slime technology, which is applied in the dense medium coal preparation process, non-pressure three-product and coal slime dense medium separation improvement process, can solve the problems of unstable coal slime heavy medium separation and high medium consumption, and achieve Reduce adverse effects, high sorting efficiency, increase the effect of equipment and links

Active Publication Date: 2020-05-19
中煤西安设计工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of high medium consumption and unstable coal slime heavy medium separation existing in the existing non-deliming and pressure-free three-product + coal slime heavy medium separation process, the present invention provides

Method used

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  • Constant-low-splitting-based non-pressure three-product and slime dense medium separation improved process
  • Constant-low-splitting-based non-pressure three-product and slime dense medium separation improved process
  • Constant-low-splitting-based non-pressure three-product and slime dense medium separation improved process

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Embodiment

[0046] Such as image 3 As shown, taking a coal preparation plant with a production scale of 2 million tons per year as an example, the present invention will be further described in detail in conjunction with the equipment connection diagram. Clean coal, medium coal, and gangue are separated by 2 sets, 1 set, and 1 linear vibrating screen respectively; clean coal, medium coal, and gangue are recovered by using 3 sets, 2 sets, and 1 magnetic separator respectively. The clean coal and the medium coal of the second stage are separated by 2 sets and 1 set of curved sieves respectively.

[0047] Selected raw coal (-50mm) 1 in qualified medium 37 1 、37 2 Sorting in the pressureless three-product dense-medium cyclone A under the action to obtain the final clean coal 2, the final medium coal 3 and the final gangue 4.

[0048] The final clean coal 2 passes through the double-layer one-stage clean coal curved screen B 1 , B 2 and a clean coal removal screen C 1 、C 2 Remove mediu...

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Abstract

The invention discloses a constant-low-splitting-based non-pressure three-product and slime dense medium separation improved process. The process specifically comprises the following steps of (a) one-stage separation, (b1) one-stage cleaned coal medium removal, (b2) one-stage middling coal medium removal, (b3) one-stage gangue medium removal, (c) second-stage slime separation, (d1) second-stage cleaned coal medium removal, (d2) second-stage middling coal medium removal, (e1) cleaned coal magnetic separation, (e2) middling coal magnetic separation, (e3) gangue magnetic separation, and (f) one-stage qualified medium blending. The improved process is high in separation efficiency, low in medium consumption, low in operation cost, little in investment, strong in practicability, and remarkablein economic benefit.

Description

technical field [0001] The invention belongs to the technical field of coal. Specifically, it relates to a dense medium coal preparation process, especially an improved process for non-pressurized three-product and coal slime dense medium separation based on constant-low split flow. Background technique [0002] Dense medium coal preparation has high separation precision, high degree of automation, and easy adjustment of separation density, which has become the leading process of coal separation. Among them, the no desliming and no pressure three-product + coal slime dense medium separation process has been applied in many coking coal preparation plants in my country because of its advantages such as simple process, less sludge, less pipeline wear, and low separation cost. This process uses a single low-density dense medium suspension to separate qualified clean coal, medium coal and gangue at one time, and the small-diameter cyclone group is used for combined medium separa...

Claims

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Application Information

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IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 张义陈警卫赵育杰包永红白霄重红伟
Owner 中煤西安设计工程有限责任公司
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