CN1243080C

CN1243080C - Automatic temperature-adjusting cold press forming method for foundry coke

Info

Publication number: CN1243080C
Application number: CN 200410039508
Authority: CN
Inventors: 李宝珠; 王甲生; 于毛杵; 李华雄
Original assignee: 李宝珠
Priority date: 2004-02-05
Filing date: 2004-02-05
Publication date: 2006-02-22
Anticipated expiration: 2024-02-05
Also published as: CN1557910A

Abstract

The present invention belongs to a coking technical process. The coking technical process completely uses coke powder, smokeless powdered coal, weathered coal, non-sticky coal discarded materials and an additional coal tar asphalt adhesive; the materials automatically generate the performance of self-heating in a high-speed stirring rotary machine with a speed adjusting method in doors at normal temperature; when the temperature of the materials is controlled between 55 DEG C and 60 DEG C, saturn-shaped formed coke blank bodies are formed by cold pressing to form formed coke with good quality through carbonization by using a full closed self-heating furnace. The coking technical process changes wastes into valuables, reduces the cost and enhances the economic benefit.

Description

The method of foundry coke automatic control temperature adjustment coldmoulding

Technical field

The invention belongs to the coking process process, particularly relate to the method for a kind of " Saturn shape " casting formed coke automatic control temperature adjustment coldmoulding.

Background technology

Foundry coke is the main fuel of cupola melting at present, and its production technique has two kinds, promptly indoor furnaceman's skill and formed coke technology.

Some countries and regions are for enlarging the utilization of coal resource, and the coking coal of making good use of less adopts relatively poor fine coal as far as possible, utilizes the moulding process of adding additives to produce foundry coke.Add pitch system forming blocks as Germany with coke powder, and the type piece is hardened in 350 ℃ oxidizing atmosphere in the sand-bath stove, produce various formed cokes, use for changing iron; The then former Soviet Union prepares burden with 85% hard coal or meager coal, 8% rich coal, 7% binding agent, is heated 120 ℃, and molded then, the result proves that the formed coke reactivity is low, the more satisfactory fuel that being iron is used.

Summary of the invention

The present invention is utilize dead meals such as coke fines, rice coal, weathered coal, non-caking coal a kind of, add the coal-tar pitch tackiness agent, under normal temperature laboratory, material is used the self-produced thermal characteristics of speed regulation method in the high-speed stirring whirler, when temperature is expected in control to 55 ℃-60 ℃, be cold-pressed into " Saturn shape " formed coke base substrate, become the high-quality formed coke through totally-enclosed self-heating stove charing, specific embodiment is as follows:

1, with two impact breakers required material is broken into the following powder of φ＜1.2mm, reaches the powder of φ 0.5mm-φ 1.2mm after first crusher in crushing, second powder that again raw material of below standard standard is continued to be crushed to below the φ 0.5mm;

2, the powder below the φ 0.5mm is accounted for 65%, the powder of φ 0.5～1.2mm account for 35% mix standby;

3, with the said mixture be benchmark, add the coal-tar pitch of 18wt% and make tackiness agent;

4, above-mentioned 2,3 materials are put into the high speed rotating stirrer from reincarnation heat, material is warmed up in 0.5 ℃ of 55 ℃ of-60 ℃ ± error, make each position of tackiness agent homogeneous immersion material;

5, material is sent into the insulation worm conveyor, sent into then in the constant temperature shaper;

6, produce " Saturn shape " formed coke base substrate with moulding press;

7, " Saturn shape " formed coke base substrate packed into carried out charing 2 hours in the totally-enclosed self produced gas process furnace, " Saturn shape " formed coke;

8, the formed coke of moulding press extrusion, likeness in form " Saturn shape " shape

φ is two kinds of specifications of 56mm, 120mm, there is the ring of one 5 mm thick at the peripheral center of formed coke, the burnt body of ring set, and play and enlarge burnt body and the effect of material spacing on every side, so that the system ventilation property increases, the product surface color is dark silver gray, and its endoplasm and exterior color basically identical then send when knocking like pig metal sound.

The physical and chemical index of product:

1. intensity: barrate strength＞95% _M40, 1.83m eminence dropping strength＞97% _M40

2. bulk specific gravity: 0.95T/m ³, true specific gravity: 1.59T/m ³

3. ash content A＜8% of product, sulphur content S＜0.6% reaches the standard of domestic and international high-quality casting formed coke;

4. the empty rate 21-25% of gas

5. thermal value: 9200 kilocalories/kg;

6. ventilation property: " Saturn shape " formed coke interblock hole is between 46%-50%, because of the contact site between " Saturn shape " formed coke is a contact, rather than the face contact, so ventilation property is better than other shape.

7. can make furnace temperature＞1500 ℃;

8. long-distance transport does not produce breeze substantially, formed coke collision expulsion rate＜0.5%.

The present invention has compared following positively effect with existing similar technology

1, uses present technique to regenerate coke fines and the waste material in production, transportation, storage process such as coke industry, production unit, traffic unit, iron-making and steel-making unit again and produce increment, turn waste into wealth, increased economic results in society;

2, the equipment of in the past producing steam heating system used in the formed coke process has both at home and abroad been saved in the invention of present technique, the consumption of gross investment and fuel is reduced, and increased economic benefit, reaches and achieves many things at one stroke;

3, present technique has been widened the supply channel of bulk high-quality casting formed coke for each foundry, and facility is boosted productivity and improved the quality of product, makes coke-iron-rate bring up to 1: 11 by general common burnt 1: 7, has saved cost greatly, has improved economic benefit;

4, a large amount of coking raw coal has been saved in the use of the technology of the present invention.For example producing 1,000 ten thousand tons of mechanical cokes calculates by 5% breeze, the breeze that produces just can reach 500,000 tons, only Shanxi one ground rough estimates annual output mechanical coke reaches 2000-3000 ten thousand villages, can produce ten thousand tons of breeze 100-150, like this, the use of the technology of the present invention just can be saved ten thousand tons of high-quality coking raw coal 200-300, and making producing coal reach social economic benefits and social benefits with the coal both sides should.

Description of drawings

Fig. 1 is an equipment synoptic diagram of the present invention

The former feed bin 2-of 1-rotary conveyor DT650 3-dryer CNG304 4-rotary conveyor DT650 5-reaction type pulverizer PFMX-0808 6-chapelet DT315 7-batch bin 8-endless belt conveyor assembly machine 9-tackiness agent feeder 10-batch mixing clarifixator HC-500 11-helical stir temperature control machine BDJ-250 12-compression molding forming machine YT32-200 13-chapelet DT315 14-work in-process bucket 15-vertical retort 16-dolly 17-finished product platform 18-storehouse

Fig. 2 is a process flow sheet of the present invention

Specific implementation method

Embodiment one

Coke fines is sent in the dryer with stock yard ground warp rotary conveyor and is dried, and the oven dry back is sent into the reaction type pulverizer with rotary conveyor and carried out powder process, sends into first batch bin with chapelet then.Before the moulding, earlier the feed opening of batch bin is opened, blanking in the desired amount is transported to the batch mixing clarifixator and tackiness agent is mixed jointly with rotary conveyor, tiltedly drains to helical stir temperature control machine then and stirs, when being stirred to 55 ℃, be pressed into " Saturn shape " 120mm formed coke base substrate with moulding press, send into vertical retort with chapelet and carry out charing, emit from the vertical heater bottom after two hours " Saturn shape " formed coke, put in storage immediately after the metering, finish all processes.

Embodiment two

Rice coal is sent in the dryer with stock yard ground warp rotary conveyor and is dried, and the oven dry back is sent into the reaction type pulverizer with rotary conveyor and carried out powder process, sends into first batch bin with chapelet then.Before the moulding, earlier the feed opening of batch bin is opened, blanking in the desired amount is transported to the batch mixing clarifixator and tackiness agent is mixed jointly with rotary conveyor, tiltedly drains to helical stir temperature control machine then and stirs, when being stirred to 60 ℃, be pressed into " Saturn shape " 56mm formed coke base substrate with moulding press, send into vertical retort with chapelet and carry out charing, emit from the vertical heater bottom after two hours " Saturn shape " formed coke, put in storage immediately after the metering, finish all processes.

Claims

The method of foundry coke automatic control temperature adjustment coldmoulding, its characteristic is to utilize a kind of dead meal of coke fines, rice coal, weathered coal, non-caking coal, add the coal-tar pitch tackiness agent, under normal temperature laboratory, material is used the self-produced thermal characteristics of speed regulation method in the high-speed stirring whirler, when temperature is expected in control to 55 ℃-60 ℃, be cold-pressed into " Saturn shape " formed coke base substrate, become formed coke through totally-enclosed hot stove charing, specific embodiment is as follows:

(1) with two impact breakers required material is broken into the following powder of φ＜1.2mm, reaches the powder of φ 0.5mm-φ 1.2mm after first crusher in crushing, second powder that again raw material of below standard standard is continued to be crushed to below the φ 0.5mm;
(2) powder below the φ 0.5mm is accounted for 65%, the powder of φ 0.5～1.2mm account for 35% mix standby;
(3) mixture that obtains with step (2) is a benchmark, adds the coal-tar pitch of 18wt% and makes tackiness agent;
(4) above-mentioned (2), (3) material are put into the high speed rotating stirrer from reincarnation heat, material is warmed up in 0.5 ℃ of 55 ℃ of-60 ℃ ± error, make each position of tackiness agent homogeneous immersion material;
(5) material is sent into the insulation worm conveyor, sent into then in the constant temperature shaper;
(6) produce " Saturn shape " formed coke base substrate with moulding press;
(7) " Saturn shape " formed coke base substrate packed into carried out charing 2 hours in the totally-enclosed self produced gas process furnace, " Saturn shape " formed coke;
(8) the formed coke likeness in form " Saturn shape " of moulding press extrusion
φ is two kinds of specifications of 56mm, 120mm, and there is the ring of one 5 mm thick at the peripheral center of formed coke, the burnt body of ring set.