CN105670669A

CN105670669A - Double-line coal blending method for preventing coke strength from deterioration

Info

Publication number: CN105670669A
Application number: CN201610133006.5A
Authority: CN
Inventors: 何有林; 陈晓光; 姜德相; 崔洁; 朱春梅; 朱婉兰; 韩文有
Original assignee: Ningbo Iron and Steel Co Ltd
Current assignee: Ningbo Iron and Steel Co Ltd
Priority date: 2016-03-09
Filing date: 2016-03-09
Publication date: 2016-06-15
Anticipated expiration: 2036-03-09
Also published as: CN105670669B

Abstract

The invention relates to a double-line coal blending method for preventing coke strength from deterioration. The method comprises the following steps: designing the main proportion according to the mine pit coal quality characteristics and coke quality control target, and dividing the main proportion into two sub-proportions according to the binding property and cokeability of each type of coal in the main proportion, wherein the two types of blended coal in the two sub-proportions have identical to similar binding property and cokeability; and pulverizing and uniformly mixing. The method does not need technical modification or capital investment increase, and is risk-free for use. After the original double-line blended coal manufacturer adopts the method, the coke crushing strength can be enhanced by 0.4-2.0%, the abrasion strength can be lowered by 0.2-1.0%, and the coke strength stability is enhanced; and the improvement degree is related to the original double-line blended coal quality difference and coal blending technical process.

Description

The blending method that a kind of two-wire coal blending prevents coke strenth from deteriorating

Technical field

The invention belongs to coal blending field, particularly to the blending method that a kind of two-wire coal blending prevents coke strenth from deteriorating.

Background technology

Two-wire design pressed mostly by the coal blending line of domestic coke-oven plant, and the less producer of the adapted coal same period generally takes one to open a standby production of having holidays by turns, and other producer has to adopt two-wire to produce because of adapted coal more simultaneously. Adopt many producers of two-wire coal blending because of two line atures of coal inequalities, cause that final mixed coal exists bigger ature of coal difference in both macro and micro aspect, cause coke strenth that deterioration in various degree occurs.

Summary of the invention

The technical problem to be solved is to provide the blending method that a kind of two-wire coal blending prevents coke strenth from deteriorating, the method is without technological transformation or increases fund input, use devoid of risk, after former two-wire coal blending producer takes the method, coke crushing strength can improve 0.4-2.0%, wear-resisting intensity can reduce 0.2-1.0%, and improves the stability of coke strenth, improves degree relevant with former two-wire mixed coal ature of coal difference and coal blending process flow process.

The blending method that a kind of two-wire coal blending of the present invention prevents coke strenth from deteriorating, including:

The main proportioning of target design is controlled according to ore deposit point coal characteristics and coke quality, main proportioning is split as two sub-proportionings by caking property and coking capacity according to coal each in main proportioning, the mixed coal caking property of two sub-proportionings is identical with coking capacity or close, followed by pulverizing, mixing; Wherein, the mixed coal mass deviation span of control of two sub-proportionings includes: volatilization controls within ± 0.5%, and G-value deviation controls within ± 2.

In described each coal, the coal such as bottle coal, lean coal, mill coal is evenly distributed in two sub-proportionings.

The mixed coal mass deviation span of control of the sub-proportioning of said two also includes: ash controls ± 1%, and sulphur content controls within 0.5%. After fractionation, the mixed coal quality of two sub-proportionings is closer to more good, but main is close to master controlling caking property and coking behavior.

Described mixing is specially after pulverizer and increases mixing machine the mixed coal of two-wire is mixed. Increase mixing machine best results, also little without mixing machine impact.

By weight percentage, described main proportioning is particularly as follows: bottle coal 20%, 1/3 coking coal 17%, 1/3 coking coal 28%, low-sulfur rich coal 7%, high-sulfur rich coal 8%, coking coal 19%, coking coal 212%, coking coal 39%, coking coal 410%, lean coal 10%;

Two sub-proportionings are respectively as follows: bottle coal 10%, 1/3 coking coal 17%, low-sulfur rich coal 7%, coking coal 19%, coking coal 212%, lean coal 5% and bottle coal 10%, 1/3 coking coal 28%, high-sulfur rich coal 8%, coking coal 39%, coking coal 410%, lean coal 5%.

Beneficial effect

(1) present invention without technological transformation or increases fund input, uses devoid of risk.

(2) after former single line coal blending producer takes the method, the adapted coal quantity same period can be increased, it is simple to the introduction of new coal and adapted work at a low price, drop this work for coal blending and create conditions.

(3) after former two-wire coal blending producer takes the method, coke crushing strength can improve 0.4-2.0%, wear-resisting intensity can reduce 0.2-1.0%, and improves the stability of coke strenth, improves degree relevant with former two-wire mixed coal ature of coal difference and coal blending process flow process.

Detailed description of the invention

Below in conjunction with specific embodiment, the present invention is expanded on further. Should be understood that these embodiments are merely to illustrate the present invention rather than restriction the scope of the present invention. In addition, it is to be understood that after having read the content that the present invention lectures, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values fall within the application appended claims limited range equally.

Embodiment 1

1. Blending is as follows:

2. mixed coal quality is as follows:

3. the arrangement of two-wire coal blending groove is as follows:

Claims

1. two-wire coal blending prevents the blending method that coke strenth deteriorates, including:

2. the blending method that a kind of two-wire coal blending according to claim 1 prevents coke strenth from deteriorating, it is characterised in that: in described each coal, bottle coal, lean coal, mill coal are evenly distributed in two sub-proportionings.

3. the blending method that a kind of two-wire coal blending according to claim 1 prevents coke strenth from deteriorating, it is characterised in that: the mixed coal mass deviation span of control of the sub-proportioning of said two also includes: ash controls ± 1%, and sulphur content controls within 0.5%.

4. the blending method that a kind of two-wire coal blending according to claim 1 prevents coke strenth from deteriorating, it is characterised in that: described mixing is specially after pulverizer and increases mixing machine the mixed coal of two-wire is mixed.

5. the blending method that a kind of two-wire coal blending according to claim 1 prevents coke strenth from deteriorating, it is characterized in that: by weight percentage, described main proportioning is particularly as follows: bottle coal 20%, 1/3 coking coal 17%, 1/3 coking coal 28%, low-sulfur rich coal 7%, high-sulfur rich coal 8%, coking coal 19%, coking coal 212%, coking coal 39%, coking coal 410%, lean coal 10%;