CN109482494A

CN109482494A - A kind of thermal coal wholegrain grade dry method upgrading discharge refuse technique

Info

Publication number: CN109482494A
Application number: CN201811396076.5A
Authority: CN
Inventors: 赵跃民; 张博; 周恩会; 段晨龙; 董良; 闫光辉; 江海深; 陈增强; 朱广庆
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2018-11-22
Filing date: 2018-11-22
Publication date: 2019-03-19
Anticipated expiration: 2038-11-22
Also published as: CN109482494B

Abstract

The invention discloses a process for upgrading the quality of steam coal with a full-grain dry method and removing gangue, and the method adopts a full dry process. The process is mainly divided into three parts, X-ray intelligent sorting, coarse-grained coal dry sorting, and fine-grained coal dry sorting. The raw coal to be selected is screened and divided into three grades, and the three grades of +50mm, 13-50mm, and ‑13mm are screened and the products are respectively entered into the X-ray intelligent sorter, the modular dry process heavy medium fluidized bed dry process Separator, fine-grained dry separator to obtain clean coal and tailings. The invention has simple technological process, high sorting efficiency, low energy consumption, no water, low production cost and good economic benefit.

Description

A kind of thermal coal wholegrain grade dry method upgrading discharge refuse technique

Technical field

The invention belongs to technical field of mineral processing, and in particular to a kind of thermal coal wholegrain grade dry method upgrading discharge refuse technique, It is particularly suitable for thermal coal dry separation, solves the problems, such as west area water shortage.

Background technique

Dry coal preparation technology is suitable for the coal separation of drought and water-scarce area, and dry sorting equipment mainly has air jump at present Eliminate sorting machine, Duplex dry separator and modular dry method air dense medium fluidized bed dry method cull eliminator.But dry coal preparation is deposited at present In shortcoming, wholegrain grade coal can not be sorted.Currently, establishing wholegrain grade coal separation technique is dry coal preparation institute face The critical issue faced.

Summary of the invention

Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of thermal coal wholegrain grade dry method Upgrading discharge refuse technique overcomes the wholegrain grade coal separation problem of drought and water-scarce area.

Technical solution: to achieve the above object, the technical solution adopted by the present invention are as follows:

A kind of thermal coal wholegrain grade dry method upgrading discharge refuse technique, raw coal is respectively through X-ray intelligently sorting, modular dry method weight Medium fluidized bed dry separation, fine fraction coal dry cleaning, obtain cleaned coal and tail coal；Specifically includes the following steps:

A) raw coal prepares: raw coal passes through level-one classifying screen first and is classified, and sieves lower raw coal and enters the classification of second level classifying screen；

B) X-ray intelligently sorts: raw coal send to X-ray intelligence separation system and sorts on the sieve of level-one classifying screen, obtains big Block spoil and cleaned coal；

C) modular dry method dense medium fluidized bed dry separation: raw coal enters modular dry method dense medium on second level classification sieve Fluidized bed dry method cull eliminator carries out dry separation, obtains cleaned coal and tail coal；

D) fine fraction coal dry cleaning: raw coal enters fine fraction dry method cull eliminator and is sorted under second level classification sieve, Obtain cleaned coal and tail coal.

Further, the aperture of the level-one classifying screen is 50mm, and the aperture of second level classifying screen is 13mm；Level-one classifying screen It is+50mm raw coal on sieve, lower sieve is -50mm raw coal；It is 13~50mm raw coal on second level classification sieve, lower sieve is -13mm raw coal.

Further, the fine fraction dry method cull eliminator is according to coal property using Duplex dry separator or vibration mould Block formula dry method dense media fluid-bed separator uses Duplex dry separator, if raw coal moisture if raw coal moisture is higher than 6% Lower than 6%, using vibration module type dry method air dense medium fluidized bed dry method cull eliminator.

Further, to Duplex dry separator and vibration module type dry method dense media fluid-bed separator, pass through tune The parameter including wind speed, amplitude, frequency, inclination angle is saved, the sorting demand of different densities distribution coal is adapted to.

Further, the step b) handles coarse coal using X-ray intelligence sorting machine, is realized by identification coal maceral Discharge refuse operation.

The entire assorting room of this technique does not have to water, and without workshop, space occupied is small, high financial profit.

The utility model has the advantages that a kind of thermal coal wholegrain grade dry method upgrading discharge refuse technique provided by the invention, compared with prior art, It has the advantage that wholegrain grade dry process is applied to the sorting of coal by the present invention, wholegrain grade coal material can be sorted.Respectively Using X-ray intelligence sorting machine, modular dry method dense medium fluidized bed and the right+50mm of fine fraction dry method cull eliminator, 50~13mm It is sorted with -13mm coal, it can be achieved that wholegrain grade coal separation, and guarantees sharpness of separation, and dry method cull eliminator Parameter adjustable, The sorting demand that different densities are distributed coal can be adapted to by adjusting the parameters such as frequency, amplitude and volume of air supply.Its is stable Reliably, good separation effect, low energy consumption, do not have to water, have wide applicability, be particularly suitable for the separation operation of arid area.

Detailed description of the invention

Fig. 1 is 1 wholegrain grade thermal coal dry separation process flow chart of example of the present invention；

Fig. 2 is 2 wholegrain grade thermal coal dry separation process flow chart of example of the present invention.

Specific embodiment

The invention discloses a kind of thermal coal wholegrain grade dry method upgrading discharge refuse technique, this method uses full-dry method technique.Work Skill is broadly divided into three parts, and the sorting of X-ray intelligence, modular dry method dense medium fluidized bed dry separation, fine fraction coal are dry Method sorting.Raw coal to be selected is divided into three grades, three+50mm, 13~50mm, -13mm grade screening products point after screening Not Jin Ru X-ray intelligence sorting machine, modular dry method air dense medium fluidized bed dry method cull eliminator, fine fraction dry method cull eliminator, obtain Cleaned coal and tail coal.Present invention process process is simple, the efficiency of separation is high, low energy consumption, do not have to water, production cost is low, economic benefit is good It is good.

The present invention will be further explained with reference to the accompanying drawings and examples.

A kind of thermal coal wholegrain grade dry method upgrading discharge refuse technique, comprising the following steps:

A) raw coal prepares: mine or coal yard carry out coal to pass through aperture first to be that 50mm classifying screen is classified ,+50mm raw coal on sieve It send through travelling belt to X-ray intelligence separation system and sorts, obtain bulk spoil and cleaned coal；

B) -50mm raw coal entrance aperture is the classification of 13mm classifying screen, and+13mm raw coal enters coarse fraction combined type dry method on sieve Sorting machine carries out dry separation, obtains cleaned coal and tail coal；

C) -13mm raw coal enters fine fraction dry method cull eliminator and is sorted, and obtains cleaned coal and tail coal.

The entire process flow of the present invention does not have to water, saves water resource, is particularly suitable for the coal upgrading of drought and water-scarce area With sorting；Using X-ray intelligence sorting process coarse coal, discharge refuse operation is realized by identification coal maceral；To size fractionated coal Charcoal uses different dry method cull eliminators, targetedly adapts to the sorting requirement of the grade, improves sharpness of separation；It can be divided by adjusting Select the sorting demand of machine parameter adaptation different densities distribution coal；Fine fraction dry method cull eliminator can be according to coal property using compound Formula dry method cull eliminator or vibration module type dry method air dense medium fluidized bed dry method cull eliminator.In addition, present invention process process is simple, nothing Workshop is needed, can be sorted under outdoor adverse circumstances.

Embodiment 1

As shown in Figure 1, the present embodiment technique is suitable for the coal of raw coal moisture lower (being lower than 6%).Raw coal prepares: mine Or coal yard carrys out coal and passes through aperture first as the classification of 50mm classifying screen ,+50mm raw coal is sent through travelling belt to X-ray intelligence on sieve Separation system sorting, obtains bulk spoil and cleaned coal；- 50mm raw coal entrance aperture is the classification of 13mm classifying screen, and+13mm is former on sieve Coal enters modular dry method air dense medium fluidized bed dry method cull eliminator dry separation, obtains cleaned coal and tail coal；- 13mm raw coal enters thin Grade dry method cull eliminator is sorted, and cleaned coal and tail coal are obtained, and in the embodiment, fine fraction dry method cull eliminator selects vibration module Formula dry method air dense medium fluidized bed dry method cull eliminator.

Embodiment 2

As shown in Fig. 2, the present embodiment technique is suitable for the coal that raw coal moisture is higher than 6%.Raw coal prepares: mine or coal storage Field carrys out coal and passes through aperture first as the classification of 50mm classifying screen, and+50mm raw coal, which is sent through travelling belt to X-ray, on sieve intelligently sorts system System sorting, obtains bulk spoil and cleaned coal；- 50mm raw coal entrance aperture is the classification of 13mm classifying screen, and+13mm raw coal enters on sieve Modular dry method air dense medium fluidized bed dry method cull eliminator or Duplex dry separator carry out dry separation, obtain cleaned coal and tail Coal；- 13mm raw coal enters Duplex dry separator and is sorted, and obtains cleaned coal and tail coal, in the embodiment, fine fraction dry method Sorting machine selects Duplex dry separator.

The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims

1. a steam coal full-grain dry method upgrading and discharging gangue technology, it is characterized in that: raw coal is separated through X-ray intelligent sorting, modular dry heavy medium fluidized bed dry sorting, fine-grained coal dry sorting, respectively Sorting to obtain clean coal and tailing coal; specifically including the following steps:

a) Raw coal preparation: The raw coal is first graded through the primary grading sieve, and the raw coal under the sieve enters the secondary grading sieve for grading;

b) X-ray intelligent sorting: the raw coal on the first grade screen is sent to the X-ray intelligent sorting system for sorting to obtain large pieces of gangue and clean coal;

c) Modular dry heavy medium fluidized bed dry separation: the raw coal on the secondary grading screen enters the modular dry heavy medium fluidized bed dry separation machine for dry separation to obtain clean coal and tailings. ;

d) Fine-grained coal dry separation: the raw coal under the secondary grading sieve enters the fine-grained dry separation machine for separation to obtain clean coal and tailing coal.

2. The steam coal full-grain dry upgrading and gangue removal process according to claim 1, characterized in that: the aperture of the primary grading sieve is 50mm, and the aperture of the secondary grading sieve is 13 mm; The upper sieve is +50mm raw coal, and the sieve is -50mm raw coal; the secondary grading screen is 13-50mm raw coal, and the sieve is -13mm raw coal.

3. The steam coal full-grain dry process upgrading and gangue discharge process according to claim 1, characterized in that: the fine-grain dry sorter adopts a composite dry sorter or a vibration module according to coal characteristics Type dry heavy medium fluidized bed separator: If the moisture content of the raw coal is higher than 6%, use the composite dry method; Sorter.

4. The steam coal full-grain dry process upgrading and gangue removal process according to claim 3, is characterized in that: for the composite dry separator and the vibration modular dry heavy medium fluidized bed separator, by Adjust parameters including wind speed, amplitude, frequency, and inclination to meet the sorting needs of coal with different density distributions.

5. The steam coal full-grain dry upgrading and gangue discharge process according to claim 1, characterized in that: the step b) adopts an X-ray intelligent sorting machine to process the bulk coal, and realizes the discharge by identifying the coal components. Waste work.