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Compound binder for lignite molding and molded coal preparation method

A binder and lignite technology, which is applied in the field of lignite briquette preparation, can solve the problems of long production cycle, high energy consumption, and cumbersome steps of compounding binders, and achieve energy saving, good cohesiveness, and long-distance The effect of transport and storage

Inactive Publication Date: 2016-09-21
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] This technology has cumbersome steps in the process of preparing composite binders, which requires stepwise heating and cooling, high energy consumption, and long production cycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing briquette with a composite binder, comprising the steps of:

[0034] 1) Adopt the northern open-pit lignite of Inner Mongolia, its water content is 10%, get 10kg lignite, carry out crushing with the pulverizer of sealed type test sample preparation, sieve the sieve of the lignite after the crushing, get the lignite more than 5mm and dry and extract quality;

[0035] 2) drying the lignite, putting it into a coal pyrolysis furnace, heating for 6 hours, the quality of the lignite is reduced to about 8kg, and its water content reaches 1%;

[0036] 3) Break the dried lignite, sieve it with a 100-mesh sieve, weigh 1 kg of lignite below 100 mesh, 30 g of coal tar pitch, and 60 g of sodium humate, put them into a mixer, and mix evenly for 5 to 10 minutes;

[0037]4) Heat the evenly stirred pulverized coal at 150°C for 1 hour, and then press the heated mixed coal material under a pressure of 15MPa to form a briquette with a size of 4cm×3cm×1.6cm, and the ...

Embodiment 2

[0040] A method for preparing briquette with a composite binder, comprising the steps of:

[0041] 1) Adopt the northern open-pit lignite of Inner Mongolia, its water content is 10%, get 10kg lignite, carry out crushing with the pulverizer of sealed type test sample preparation, sieve the sieve of the lignite after the crushing, get the lignite more than 5mm and dry and extract quality;

[0042] 2) drying the lignite, putting it into a coal pyrolysis furnace, heating for 6 hours, the quality of the lignite is reduced to about 8kg, and its water content reaches 1%;

[0043] 3) Break the dried lignite, sieve it with a 100-mesh sieve, weigh 1 kg of lignite below 100 mesh, 70 g of sodium humate, and 70 g of lignin, put them into a mixer, and mix them uniformly for 5 to 10 minutes;

[0044] 4) Heat the evenly stirred pulverized coal at 95°C for 2 hours, and then press the heated mixed coal material under a pressure of 15MPa to form a briquette with a size of 4cm×3cm×1.6cm, and the...

Embodiment 3

[0047] A method for preparing briquette with a composite binder, comprising the steps of:

[0048] 1) Adopt the northern open-pit lignite of Inner Mongolia, its water content is 10%, get 10kg lignite, carry out crushing with the pulverizer of sealed type test sample preparation, sieve the sieve of the lignite after the crushing, get the lignite more than 5mm and dry and extract quality;

[0049] 2) drying the lignite, putting it into a coal pyrolysis furnace, heating for 6 hours, the quality of the lignite is reduced to about 8kg, and its water content reaches 1%;

[0050] 3) the dried lignite is crushed, sieved with a 100-order sieve, weighed lignite 1kg and sodium humate 50g, lignin 50g, and microcrystalline cellulose 10g below 100 orders, put into a mixer, and mix evenly for 5 ~10min;

[0051] 4) Heat the evenly stirred pulverized coal at 110°C for 2 hours, and then press the heated mixed coal material under a pressure of 15MPa to form a briquette with a size of 4cm×3cm×1...

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Abstract

The invention provides a compound binder for lignite molding. The compound binder comprises two or more components of sodium humate, coal tar pitch and lignin. The compound binder takes a low-cost organic binder as a main component, a few binder is used, a preparation method is simple, components easily producing ash are not used, and the problems that a binder in the prior art contains much ash, the use amount is large, a preparation method is complicated and the cost is higher are solved. The compound binder further enables prepared molded coal to have higher falling strength, cold compressive strength and heat stability on the basis of solving the problems and has broader industrial application prospect.

Description

technical field [0001] The invention relates to the field of preparation of lignite briquettes, in particular to a lignite forming composite binder and a method for preparing briquettes. Background technique [0002] my country is rich in lignite resources, and has the characteristics of concentrated distribution, shallow burial, and easy mining. my country's proven reserves of lignite have reached 130.3 billion tons, accounting for 13% of the country's total coal reserves. It is concentrated in eastern Inner Mongolia, Yunnan and the three northeastern provinces. The lignite distributed in the eastern part of Inner Mongolia accounts for more than 70% of the total national lignite. Efficient and full utilization of lignite resources can not only alleviate my country's energy supply dilemma, but also drive the development of the national economy. [0003] Lignite is the coal with the lowest degree of coalification. It has the characteristics of high moisture, low density, n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/14C10L5/04
CPCC10L5/143C10L5/04C10L2290/08C10L2290/28C10L2290/30C10L2290/32
Inventor 邓鑫夏碧华高建薛逊吴道洪
Owner SHENWU TECH GRP CO LTD
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