阅读说明：本技术 一种低氮增碳剂加工工艺 (Processing technology of low-nitrogen carburant ) 是由 罗进 于 2019-11-28 设计创作，主要内容包括：本发明公开了一种低氮增碳剂加工工艺,本发明通过在负压条件下对增碳剂进行脱氮处理,有效降低了增碳剂中氮的含量,同时利用石油焦、石墨、自由碳、沥青等原料制备增碳剂,在保证增碳剂性能的前提下,大大降低了增碳剂的制造成本。通过搅拌装置解决了目前增碳剂制备过程中常常出现搅拌不均匀、只能局部搅拌的问题。通过从动轴、传动轴、第二杆之间形成连杆机构,第二杆随第一杆运动,且第二杆在传动轴内相对滑动,带动从动轴转动,从而增加第一搅拌叶、第二搅拌叶运动轨迹的复杂性,且利用第一搅拌叶、第二搅拌叶扩大搅拌范围,保证罐体内无死角,搅拌均匀。(The invention discloses a processing technology of a low-nitrogen carburant, which effectively reduces the nitrogen content in the carburant by performing denitrification treatment on the carburant under the condition of negative pressure, and simultaneously utilizes petroleum coke, graphite, free carbon, asphalt and other raw materials to prepare the carburant, thereby greatly reducing the manufacturing cost of the carburant on the premise of ensuring the performance of the carburant. The problems that stirring is uneven and only local stirring is performed in the existing carburant preparation process are solved through the stirring device. Through forming link mechanism between driven shaft, transmission shaft, the second pole is along with first pole motion, and the second pole is relative slip in the transmission shaft, drives the driven shaft and rotates to increase the complexity of first stirring leaf, second stirring leaf motion track, and utilize first stirring leaf, second stirring leaf to enlarge stirring range, guarantee that jar internal no dead angle, the stirring.)

1. The processing technology of the low-nitrogen carburant is characterized by comprising 150 parts of petroleum coke 100-50 parts, 30-50 parts of graphite, 10-20 parts of free carbon and 1-8 parts of a binder in parts by weight, and the preparation process comprises the following steps:

weighing raw materials: weighing 150 parts of petroleum coke 100-one, 30-50 parts of graphite, 10-20 parts of free carbon and 1-8 parts of binder;

crushing raw materials in the step (2): crushing petroleum coke and coking carbon into a mixture A, and placing the mixture A and a graphite material into an ultrasonic dispersion machine to be ultrasonically dispersed into a mixture B;

stirring and mixing: placing the mixture B, free carbon and a binder into a stirring device, stirring and reacting for 1-3h at room temperature, then heating to 1500-;

and (4) granulating: carrying out rotary disc granulation on the mixture C in the step (3) to obtain a carburant;

step (5) heat treatment: the recarburizer is placed under the conditions of 70-110 ℃ and the pressure of-0.05-0.1 mpa for standing for 2.5-3 hours.

Screening: placing the recarburizer on a vibrating screen for screening;

and (6) packaging: and (5) classifying and packaging the carburant screened in the step (5) according to the granularity.

2. The process of claim 1, wherein the petroleum coke is calcined petroleum coke or acidified petroleum coke.

3. The process of claim 1, wherein the binder is pitch.

4. The processing technology of the low-nitrogen carburant according to the claim 1, the claim 2 or the claim 3, wherein the stirring device comprises a tank body (1), a plurality of supporting columns (2) arranged at the bottom of the tank body (1), and a stirring assembly (3) positioned in the tank body (1);

the stirring assembly (3) comprises a motor (4) arranged at the top of the tank body (1), a first fixed block (5) arranged in the tank body (1) and positioned at the top of the tank body (1), a rotating shaft (6) with one end arranged on an output shaft of the motor (4) and the other end penetrating through the tank body (1) and connected with the tank body (1) through a rolling bearing, a driving shaft (7) with one end arranged on the rotating shaft (6), a driving shaft (8) vertically arranged on the driving shaft (7) and positioned at one end of the driving shaft (7) far away from the rotating shaft (6), a driven shaft (9) with one end hinged at the bottom of the first fixed block (5), a transmission shaft (10) vertically arranged on the driven shaft (9) and positioned at one end of the driven shaft (9) far away from the first fixed block (5), a first rod (11) movably arranged on the driving shaft (8), a, A second rod (12) movably mounted on the drive shaft (10);

the driving shaft (7) and the driving shaft (8) are both positioned above the first rod (11), and the driven shaft (9) and the transmission shaft (10) are both positioned below the second rod (12);

first stirring blades (13) are arranged at two ends of the first rod (11), and second stirring blades (14) are arranged at two ends of the second rod (12).

5. The process for preparing a low-nitrogen carburant according to claim 4, wherein the first stirring blade (13) and the second stirring blade (14) have the same structure;

the first stirring blade (13) comprises a stirring shaft (15) arranged at the bottom of the first rod (11), install on (mixing) shaft (15) and with solid fixed ring (17) of (mixing) shaft (15) coaxial setting through many dead levers (16), install at solid fixed ring (17) up end and around solid fixed ring (17) central axis annular array, the stirring leaf A (18) of V-arrangement structure, install terminal surface and around solid fixed ring (17) central axis annular array under solid fixed ring (17), with stirring leaf A (18) about solid fixed ring (17) upper and lower symmetry's stirring leaf B (19), the inner cylinder face is installed on (mixing) shaft (15) and outer cylinder face installs support ring A (20) on stirring leaf A (18) through many spinal branchs bracing piece A (22), the inner cylinder face is installed on (mixing) shaft (15) and outer cylinder face installs support ring B (21) on stirring leaf B (19) through many spinal branchs bracing piece B.

6. The processing technology of the low-nitrogen carburant according to claim 4, wherein a through groove A for the first rod (11) to pass through is arranged on the driving shaft (8), and a sliding groove A is arranged in the through groove A; a sliding block A which is matched with the sliding groove A is arranged on the first rod (11), and the sliding block A is inserted into the sliding groove A;

the transmission shaft (10) is provided with a through groove B for the second rod (12) to pass through, a sliding groove B is arranged in the through groove B, a sliding block B with the rest sliding grooves B matched with each other is arranged on the second rod (12), and the sliding block B is inserted into the sliding groove B.

Technical Field

The invention particularly relates to a processing technology of a low-nitrogen carburant.

Background

In the smelting process of steel products, the carbon content in molten iron is reduced due to the smelting loss of carbon elements in the molten iron caused by long smelting time, heat preservation time, overheating time and other factors, so that the carbon content in the molten iron cannot reach the theoretical value expected by smelting, and carbon-containing substances added for complementing the carbon content burnt in the steel smelting process are called carburant.

The recarburizers are derived from coal, petroleum or graphite, and three series of recarburizers are formed by changing woods at high temperature and high pressure for thousands of years, so organic matters such as heterocyclic compounds, benzenes, hydrocarbon compounds or derivatives are inevitable in the formation process of the coal, the petroleum and the graphite, nitrogen elements are inevitably introduced into the three series of recarburizers, the nitrogen elements are more than ten thousand ppm and less than several thousand ppm, once the nitrogen elements enter molten steel and are difficult to remove, the nitrogen contained in the recarburizers not only reduces the mechanical property of the recarburizers, but also is an important reason for forming shrinkage cavities, white point defects and casting blank cracks, and great difficulty is brought to the preparation of high-quality steel. Meanwhile, carbon in the existing carburant is dissolved in molten iron in two ways of dissolution and diffusion, and the main method for increasing the carbon content in the industry at present is to dissolve and diffuse the carbon by stirring, but the problems of nonuniform stirring and only local stirring often occur.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a processing technology of a low-nitrogen carburant.

The technical scheme for solving the problems comprises the following steps: a processing technology of a low-nitrogen carburant comprises, by weight, 150 parts of petroleum coke 100-50 parts, 30-50 parts of graphite, 10-20 parts of free carbon and 1-8 parts of a binder, and the preparation process comprises the following steps:

weighing raw materials: weighing 150 parts of petroleum coke 100-one, 30-50 parts of graphite, 10-20 parts of free carbon and 1-8 parts of binder;

crushing raw materials in the step (2): crushing petroleum coke and coking carbon into a mixture A, and placing the mixture A and a graphite material into an ultrasonic dispersion machine to be ultrasonically dispersed into a mixture B;

stirring and mixing: placing the mixture B, free carbon and a binder into a stirring device, stirring and reacting for 1-3h at room temperature, then heating to 1500-;

and (4) granulating: carrying out rotary disc granulation on the mixture C in the step (3) to obtain a carburant;

step (5) heat treatment: the recarburizer is placed under the conditions of 70-110 ℃ and the pressure of-0.05-0.1 mpa for standing for 2.5-3 hours.

Screening: placing the recarburizer on a vibrating screen for screening;

and (6) packaging: and (5) classifying and packaging the carburant screened in the step (5) according to the granularity.

Further, the petroleum coke is calcined petroleum coke or acidified petroleum coke.

Further, the binder is asphalt.

Furthermore, the stirring device comprises a tank body, a plurality of support columns arranged at the bottom of the tank body and a stirring assembly positioned in the tank body;

the stirring assembly comprises a motor arranged at the top of the tank body, a first fixed block arranged in the tank body and positioned at the top of the tank body, a rotating shaft with one end arranged on an output shaft of the motor and the other end penetrating through the tank body and connected with the tank body through a rolling bearing, a driving shaft with one end arranged on the rotating shaft, a driving shaft vertically arranged on the driving shaft and positioned at one end of the driving shaft far away from the rotating shaft, a driven shaft with one end hinged at the bottom of the first fixed block, a transmission shaft vertically arranged on the driven shaft and positioned at one end of the driven shaft far away from the first fixed block, a first rod movably arranged on the driving shaft, and a second rod arranged at;

the driving shaft and the driving shaft are both positioned above the first rod, and the driven shaft and the transmission shaft are both positioned below the second rod;

first stirring leaves are arranged at two ends of the first rod, and second stirring leaves are arranged at two ends of the second rod.

Further, the first stirring blade and the second stirring blade have the same structure;

first stirring leaf is including installing the (mixing) shaft in first pole bottom, install on the (mixing) shaft and with the solid fixed ring of the coaxial setting of (mixing) shaft through many dead levers, install at solid fixed ring up end and around solid fixed ring the central axis annular array, the stirring leaf A of V-arrangement structure, install at solid fixed ring down the terminal surface and around solid fixed ring the central axis annular array, with stirring leaf A about solid fixed ring longitudinal symmetry's stirring leaf B, interior cylinder installs on the (mixing) shaft and outer cylinder installs the support ring A on stirring leaf A through many spinal branchs bracing piece A, interior cylinder installs on the (mixing) shaft and outer cylinder installs support ring B on stirring leaf B through many spinal.

Further, a through groove A for the first rod to pass through is formed in the driving shaft, and a sliding groove A is formed in the through groove A; the first rod is provided with a sliding block A which is matched with the sliding groove A, and the sliding block A is inserted into the sliding groove A;

the transmission shaft is provided with a through groove B for the second rod to pass through, a sliding groove B is arranged in the through groove B, a sliding block B with the rest sliding grooves B matched with each other is arranged on the second rod, and the sliding block B is inserted into the sliding groove B.

The invention has the following beneficial effects: according to the invention, the nitrogen removal treatment is carried out on the carburant under the negative pressure condition, so that the nitrogen content in the carburant is effectively reduced, and meanwhile, the carburant is prepared from petroleum coke, graphite, free carbon, asphalt and other raw materials, so that the manufacturing cost of the carburant is greatly reduced on the premise of ensuring the performance of the carburant. The problems that stirring is uneven and only local stirring is performed in the existing carburant preparation process are solved through the stirring device. Through forming link mechanism between driven shaft, transmission shaft, the second pole is along with first pole motion, and the second pole is relative slip in the transmission shaft, drives the driven shaft and rotates to increase the complexity of first stirring leaf, second stirring leaf motion track, and utilize first stirring leaf, second stirring leaf to enlarge stirring range, guarantee that jar internal no dead angle, the stirring.

Drawings

FIG. 1 is a cross-sectional view of a stirring device of the present invention;

FIG. 2 is a sectional view taken along A-A of FIG. 1;

fig. 3 is a sectional view of the first agitating blade of the present invention.

In the figure: 1-tank body, 2-support column, 3-stirring component, 4-motor, 5-first fixed block, 6-rotating shaft, 7-driving shaft, 8-driving shaft, 9-driven shaft, 10-driving shaft, 11-first rod, 12-second rod, 13-first stirring blade, 14-second stirring blade, 15-stirring shaft, 16-fixed rod, 17-fixed ring, 18-stirring blade A, 19-stirring blade B, 20-support ring A, 21-support ring B, 22-support rod A, 23-support rod B.

Detailed Description

The invention is further described with reference to the following drawings and detailed description.