CN102492448A

CN102492448A - Coal blending coking method capable of controlling quality of coking coal

Info

Publication number: CN102492448A
Application number: CN201110412785XA
Authority: CN
Inventors: 项茹; 薛改凤; 鲍俊芳; 詹立志; 盛军波; 刘向勇; 宋子逵; 张雪红; 陈鹏; 张前香
Original assignee: Wuhan Iron and Steel Group Corp
Current assignee: Wuhan Iron and Steel Group Corp
Priority date: 2011-12-12
Filing date: 2011-12-12
Publication date: 2012-06-13

Abstract

The invention relates to a coal blending coking method capable of controlling quality of coking coal, which includes the steps: selecting coking coal meeting requirements and fat coal + 1/3 coking coal; and adjusting proportions of each kind of coal. A detailed matching method includes: selecting 35%-45% of coking coal, 35%-45% of fat coal+1/3 coking coal, 1%-5% of gas fat coal and 5%-15% of lean coal to conduct coal blending and coking. Under the technology conditions that step crushing, mould coal technology and tamping coking do not exist, the coal blending coking method utilizes resources effectively and conducts coking on a mechanical coke oven higher than 4 meters, and coke strength indexes can be all reached, namely crushing strength M40 is larger than 80%, abrasive resistance M10 is smaller than 7.0%, coke reactivity index (CRI) is smaller than 30%, and coke strength after reaction (CSR) is larger than 62%.

Description

A kind of coal-blending coking method of controlling the coking coal quality

Technical field

The invention belongs to the coke making and coal blending technical field, particularly a kind of coal-blending coking method of controlling the coking coal quality.

Background technology

In recent years, coking industry output increases sharply, coke quality steadily improves, and has satisfied the blast-furnace smelting demand basically, also causes coking coal in short supply simultaneously, and the contradiction that high-quality caking coal is in short supply is particularly outstanding.Each enterprise carries out coal segmentation work one after another according to the coking coal quality; Especially to coking coal, 1/3 coking coal etc.; It is subdivided into fat coal low grade coal etc., but what of concrete adapted amount are adjusted according to empirical value mostly; And a large amount of adapted high-quality coking coal, all unfavorable to the optimization adapted of the Sustainable development of coking industry and resource.

Summary of the invention

The purpose of this invention is to provide the domestic coke-oven plant of a kind of breakthrough according to traditional V-G method; And empirical method adapted coking coal; The comprehensive coking coal coarse grain of two foundations is inlayed summation, caking index (G value), Giseeler fluidity (MF) control coking coal quality, and proposes the coal-blending coking method of the control coking coal quality of reasonable adapted scheme.

To achieve these goals, the technical scheme that the present invention adopted is:

A kind of coal-blending coking method of controlling the coking coal quality, concrete steps are:

First step: select satisfactory coking coal: the comprehensive coking coarse grain of each coking coal is inlayed and is reached more than 50%; Caking index G value＞80; The beginning softening temperature greater than 400 ℃, the Giseeler fluidity peak logMF＞2ddpm;

Second step: select satisfactory rich coal+1/3 coking coal: rich coal+1/3 coking coal coking coarse grain pattern structure is reached more than 40%;

Third step: regulate each single coal proportioning of planting, make the mixed coal technological property reach requirement: the G value is 79-82, Giseeler fluidity logMF＞2-3ddpm, and inferior turgidity difficult to understand expands entirely: a+b=30%-40%;

Concrete application method is: select the coking coal of 35%-45% for use, gas-fat coal (bottle coal) and the 5%-15% lean coal of the rich coal of 35%-45%+1/3 coking coal and 1%-5% carry out coal-blending coking.

The present invention can be under the processing condition of no graded crushing, moulded coal technology or tamping coking; Its resource is effectively utilized; Coking on the cokery more than 4 meters, its coke strenth index all can reach: shatter strength M40 is greater than 80%, and abrasive wear resistance M10 is less than 7.0%; Reactive (CRI) less than 30%, post-reaction strength (CSR) is greater than 62%.

Embodiment

Below in conjunction with embodiment further explain the present invention.

The present invention is mainly the optimization coal blending and points the direction, and excessive adapted high-quality caking coal makes high-quality caking coal and coking coal inferior reasonably combined, reaches coking coal resource and rationally utilizes.

First step: rationally adjust high-quality coking coal and coking coal proportioning inferior, make combination coking coal quality reach requirement: the comprehensive coking coarse grain of each coking coal is inlayed and is reached more than 50%; Caking index G value＞80; The beginning softening temperature greater than 400 ℃, the Giseeler fluidity peak logMF＞2ddpm;

Second step: rationally adjust 1/3 coking coal and rich coal proportioning, make rich coal+1/3 coking coal quality reach requirement: rich coal+1/3 coking coal coking coarse grain pattern structure is reached more than 40%;

Third step: rationally adjust coking coal, 1/3 coking coal, rich coal, gas-fat coal (bottle coal), lean coal proportioning; Make mixed coal technic index control zone of reasonableness: the G value is 79-82; Giseeler fluidity logMF＞2-3ddpm, inferior turgidity difficult to understand expands entirely: a+b=30%-40%;

Test coal: gas-fat coal, bottle coal, rich coal, 1/3 coking coal, coking coal, meager lean coal.Each single proximate analysis of coal result that plants sees table 1.

The single coal coal analysis result that plants of table 1

Coal sample	Ad/％	Vdaf/％	G	Y/mm
					Gas-fat coal	8.00	41.45	98	26
Bottle coal	8.10	36.58	73	11
					1/3 coking coal	10.93	31.11	95	20
Rich coal	9.99	31.63	93	26
					Coking coal 1#	10.43	24.87	93	21
Coking coal 2#	9.21	21.39	82	16
					Coking coal 3#	10.28	25.01	78	15
Lean coal	9.59	15.35	17	4

Embodiment 1:

(1) coking coal is mixed by 1: 1 with coking coal 1# and coking coal 2#, its quality: the coking coarse grain is inlayed and is reached 52%; Caking index G value 84; 410 ℃ of beginning softening temperatures, Giseeler fluidity peak logMF:2.56ddpm;

(2) 1/3 coking coal and rich coal were mixed by 2: 1, its quality: 1/3 coking coal and rich coal coking coarse grain 42%;

(3) the concrete proportioning of each coal: gas-fat coal 3%; Bottle coal 2%; 1/3 coking coal: 30%; Rich coal 15%; Coking coal 1#22%; Coking coal 2#22%; Lean coal 6%.

Mixed coal technology G value is 80, Giseeler fluidity logMF2.5ddpm, and inferior turgidity difficult to understand expands entirely: a+b=35%;

This coal blending scheme coking on the cokery more than 4 meters, its coke strenth index all can reach: shatter strength M40 is greater than 80%, and abrasive wear resistance M10 is less than 7.0%, and reactive (CRI) less than 30%, post-reaction strength (CSR) is greater than 62%.

Embodiment 2:

(1) coking coal is mixed by 2: 1 with coking coal 1# and coking coal 2#, its quality: the coking coarse grain is inlayed and is reached 58%; Caking index G value 88; 408 ℃ of beginning softening temperatures, Giseeler fluidity peak logMF:2.76ddpm;

(2) 1/3 coking coal and rich coal were mixed by 1: 1, its quality: 1/3 coking coal and rich coal coking coarse grain 40%;

(3) the concrete proportioning of each coal: bottle coal 5%; 1/3 coking coal 20%; Rich coal: 20%; Coking coal 1#30%; Coking coal 2#15%; Lean coal 10%.

Mixed coal technology G value is 82, Giseeler fluidity logMF2.5ddpm, and inferior turgidity difficult to understand expands entirely: a+b=36%; This coal blending scheme coking on the cokery more than 4 meters, its coke strenth index all can reach: shatter strength M40 is greater than 80%, and abrasive wear resistance M10 is less than 7.0%, and reactive (CRI) less than 30%, post-reaction strength (CSR) is greater than 62%.

Embodiment 3:

(1) coking coal is mixed by 1: 1 with coking coal 1#, coking coal 3#, its quality: the coking coarse grain is inlayed and is reached 50%; Caking index G value 82; 405 ℃ of softening temperatures of beginning, the Giseeler fluidity peak logMF:2.43ddpm;

(2) 1/3 coking coal and rich coal were mixed by 2: 1, its quality: 1/3 coking coal and rich coal coking coarse grain 40%;

(3) gas-fat coal 5%; 1/3 coking coal 27%; Rich coal 13%; Coking coal 1#20%; Coking coal 3#20%; Lean coal 15%.

Each coal blending technology G value is 82, Giseeler fluidity logMF2.3ddpm, and inferior turgidity difficult to understand expands entirely: a+b=32%; This coal blending scheme coking on the cokery more than 4 meters, its coke strenth index all can reach: shatter strength M40 is greater than 80%, and abrasive wear resistance M10 is less than 7.0%, and reactive (CRI) less than 30%, post-reaction strength (CSR) is greater than 62%.

The content of not doing in this specification sheets to describe in detail belongs to this area professional and technical personnel's known prior art.

Claims

1. coal-blending coking method of controlling the coking coal quality, concrete steps are:

Third step: regulate each single coal proportioning of planting, make the mixed coal technological property reach following requirement: the G value is 79-82, Giseeler fluidity logMF＞2-3ddpm, and inferior turgidity difficult to understand expands entirely: a+b=30%-40%;

Concrete application method: select the coking coal of 35%-45% for use, gas-fat coal and the 5%-15% lean coal of the rich coal of 35%-45%+1/3 coking coal and 1%-5% carry out coal-blending coking.