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Novel process for producing coal gangue ceramsite through dry-method powder preparation and static sintering

A coal gangue ceramsite, dry powder making technology, applied in the production of ceramic materials, clay products, applications, etc., can solve the uneven quality of raw ceramsite of coal gangue raw materials, large quality changes of gangue ceramsite, chain grate The problem of large loss of the transport plate of the machine can be solved, and the effects of heat control, efficient utilization, gas energy saving and quality improvement can be achieved.

Inactive Publication Date: 2021-11-16
SHANDONG ECON ENERGY SAVING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is that in the traditional coal gangue ceramsite preparation process, the production capacity of the rotary kiln is low, the consumption of natural gas is high, the loss of the transport plate of the chain grate is large, and the quality of the green ceramsite of the used coal gangue raw material is not uniform. The quality of the produced gangue ceramsite varies greatly from top to bottom

Method used

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  • Novel process for producing coal gangue ceramsite through dry-method powder preparation and static sintering
  • Novel process for producing coal gangue ceramsite through dry-method powder preparation and static sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] as per figure 1 The daily processing capacity of the shown technological process is 166m 3 gangue ceramsite

[0061] Coal gangue is broken into small pieces with a particle size of ≤50mm before use, and stacked and reclaimed equipment is used for stacking and homogenization, and vertical retrieving is used for use.

[0062] The homogenized coal gangue and auxiliary materials are dry-processed into powder: the homogenized coal gangue and auxiliary materials are respectively loaded into different feeders, and mixed in proportion by the electronic batching device and sent to the vertical mill for dry grinding . Fineness ground to 250 mesh (mesh aperture 58 μ m) sieve remaining 2.5% (the weight percent of remaining test sample on the sieve), moisture is controlled at 1 ± 0.5%.

[0063] The raw materials that have been ground to fineness are collected by bag dust removal, and sent to the homogenization bin through the conveying system for storage and homogenization.

[0...

Embodiment 2

[0072] as per figure 1 The daily processing capacity of the shown technological process is 138m 3 gangue ceramsite

[0073] Coal gangue is broken into small pieces with a particle size of ≤50mm before use, and stacked and reclaimed equipment is used for stacking and homogenization, and vertical retrieving is used for use.

[0074] The homogenized coal gangue and auxiliary materials are dry-processed into powder: the homogenized coal gangue and auxiliary materials are respectively loaded into different feeders, and mixed in proportion by the electronic batching device and sent to the vertical mill for dry grinding . Fineness ground to 250 mesh (mesh aperture 58μm) sieve remaining 3 ± 1% (the weight percentage of remaining test sample on the sieve), moisture is controlled at 1 ± 0.5%.

[0075] The raw materials that have been ground to fineness are collected by bag dust removal, and sent to the homogenization bin through the conveying system for storage and homogenization.

...

Embodiment 3

[0084] as per figure 1 The daily processing capacity of the shown technological process is 104m 3 gangue ceramsite

[0085] Coal gangue is broken into small pieces with a particle size of ≤50mm before use, and stacked and reclaimed equipment is used for stacking and homogenization, and vertical retrieving is used for use.

[0086] The homogenized coal gangue and auxiliary materials are dry-processed into powder: the homogenized coal gangue and auxiliary materials are respectively loaded into different feeders, and mixed in proportion by the electronic batching device and sent to the vertical mill for dry grinding . Fineness ground to 250 mesh (mesh aperture 58μm) sieve remaining 3 ± 1% (the weight percentage of remaining test sample on the sieve), moisture is controlled at 1 ± 0.5%.

[0087]The raw materials that have been ground to fineness are collected by bag dust removal, and sent to the homogenization bin through the conveying system for storage and homogenization.

...

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Abstract

The embodiment of the invention discloses a novel process for producing coal gangue ceramsite through dry-method powder preparation and static sintering, and belongs to the technical field of comprehensive utilization of coal gangue. The specific technological process of the new process comprises the following steps: firstly, crushing and stockpiling and homogenizing coal gangue, carrying out dry-method powder preparation on the homogenized coal gangue and auxiliary materials, storing and homogenizing powder obtained by dry-method powder preparation in a homogenizing bin, humidifying and premixing homogenized raw material fine powder to form master batches, adding water into the master batches to prepare green ceramsite, sieving to obtain qualified green pellet particles; paving a bottom material and an edge material, then distributing green pellet particles into a trolley, and finally feeding the trolley on which the materials are distributed into a static sintering tunnel kiln through a trolley system for static sintering to produce the coal gangue ceramsite. Static sintering is adopted in the sintering section, ceramsite drying is achieved through waste heat circulation, hot air of the ceramsite soaking section serves as secondary air to be fed into the high-temperature section to be recycled in the roasting section, waste heat of the first cooling section serves as combustion-supporting air in a combustion-supporting mode, the combustion-supporting air temperature is increased, and fuel gas energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of coal gangue, and relates to a new process for producing coal gangue ceramsite by static sintering of dry pulverization. Background technique [0002] Coal gangue is a kind of associated mineral of coal. It is solid waste with low calorific value and hard texture discharged during the mining and washing process of coal. Its calorific value is generally lower than 6.3MJ / kg, and it contains Al 2 o 3 , SiO 2 and Fe 2 o 3 and other inorganic ash, the total content reaches 60-95% of the total coal gangue, and also contains varying amounts of CaO, MgO, Na 2 O, K 2 O.P 2 o 5 , SO 3 And trace rare elements (gallium, vanadium, titanium, cobalt). Generally, 0.15-0.2 tons of coal gangue are produced for every 1 ton of raw coal produced. [0003] The accumulated stockpile of coal gangue in my country exceeds 5 billion tons, covering an area of ​​more than 200,000 mu, increasing b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/24C04B33/30C04B33/32
CPCC04B33/1324C04B33/24C04B33/30C04B33/32C04B2235/6567C04B2235/6565C04B2235/96C04B2235/77C04B2235/95C04B2235/3418Y02P40/60
Inventor 徐顺涛姚长青刘纯杰郑灵棋
Owner SHANDONG ECON ENERGY SAVING TECH
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