阅读说明：本技术 一种钒氮合金湿料球干燥方法及其生产设备 (Vanadium-nitrogen alloy wet material ball drying method and production equipment thereof ) 是由 王福海 罗以超 王永钢 吴秋廷 吴和培 吴恩国 杨飞 游本银 于 2021-05-20 设计创作，主要内容包括：本发明提供的一种钒氮合金湿料球干燥方法及其生产设备通过在线副窑干燥方式实现了湿料球预干燥,而后直接将从经过所述推板窑副窑预干燥的料球推入推板窑主窑,充分利用了所述推板窑副窑干燥时热量,实现了节能降耗；湿料球直接装入坩埚并在所述推板窑副窑中干燥后,而后直接推入所述推板窑主窑不需倒料,避免了生产现场扬尘问题,现场作业环境得到很大改善；同时避免了倒料过程对料球完整性的破坏,产品表面外观质量得到改善。(The method and the production equipment for drying the vanadium-nitrogen alloy wet material balls realize the pre-drying of the wet material balls in an online auxiliary kiln drying mode, and then directly push the material balls pre-dried by the auxiliary kiln of the pushed slab kiln into the main kiln of the pushed slab kiln, thereby fully utilizing the heat in the drying process of the auxiliary kiln of the pushed slab kiln and realizing the purposes of saving energy and reducing consumption; wet pellets are directly loaded into the crucible and dried in the secondary kiln of the pushed slab kiln, and then are directly pushed into the main kiln of the pushed slab kiln without dumping, so that the problem of dust emission in the production field is avoided, and the field operation environment is greatly improved; meanwhile, the damage of the material ball integrity in the material pouring process is avoided, and the surface appearance quality of the product is improved.)

1. A method for drying vanadium-nitrogen alloy wet material balls is characterized by comprising the following steps,

mixing materials according to a preset water adding coefficient formula, and dehydrating the vanadium-nitrogen alloy wet pellets in a drying and curing mode;

arranging a pushed slab kiln secondary kiln for drying at the external circulation inlet end of the pushed slab kiln main kiln, and loading vanadium-nitrogen alloy wet pellets into a crucible by using a loading device;

pushing the crucible filled with the vanadium-nitrogen alloy wet material balls into the pushed slab kiln secondary kiln by using a pushing device;

protective gas is sent into the auxiliary kiln of the pushed slab kiln, and the wet vanadium-nitrogen alloy pellets in the auxiliary kiln of the pushed slab kiln are heated and dried by a heating device;

and further pushing the vanadium-nitrogen alloy wet pellets dried by the auxiliary kiln of the pushed slab kiln into the main kiln of the pushed slab kiln by using the pushing device to perform reduction nitriding treatment.

2. The method for drying the vanadium-nitrogen alloy wet pellets as claimed in claim 1, wherein the pushing device pushes the crucible containing the vanadium-nitrogen alloy wet pellets into the pushed slab kiln secondary kiln, and the pushing speed of the pushing device is controlled to be any one of 14 min/slab to 17 min/slab.

3. The method for drying the vanadium-nitrogen alloy wet pellets as claimed in claim 2, wherein the propelling speed is any one of the six propelling speeds of 14 min/plate, 14.5 min/plate, 15 min/plate, 15.5 min/plate, 16 min/plate and 17 min/plate, and the propelling speed is pushed into the pushed slab kiln auxiliary kiln for drying.

4. The method for drying the vanadium-nitrogen alloy wet pellets as claimed in any one of claims 1 to 3, wherein the pushing speed of pushing the crucible containing the vanadium-nitrogen alloy wet pellets into the pushed slab kiln secondary kiln by using the pushing device is consistent with the pushing speed of pushing the vanadium-nitrogen alloy wet pellets dried by the pushed slab kiln secondary kiln further into the pushed slab kiln main kiln.

5. The method for drying the vanadium-nitrogen alloy wet pellets as claimed in claim 1, wherein the stable working temperature for heating and drying the pushed slab kiln secondary kiln is controlled to be between 180 ℃ and 200 ℃.

6. The method for drying the vanadium-nitrogen alloy wet pellets as claimed in claim 1, wherein positive pressure is always maintained in the pushed slab kiln secondary kiln.

7. The method for drying the vanadium-nitrogen alloy wet pellets as claimed in claim 1, wherein the protective gas is a neutral gas or a reducing gas containing nitrogen.

8. The method for drying the vanadium-nitrogen alloy wet pellets as claimed in claim 1, wherein the propulsion device and the heating device are controlled by an electric control device according to a set program.

9. A vanadium-nitrogen alloy wet pellet drying production device is characterized in that the vanadium-nitrogen alloy wet pellet drying method of any one of claims 1 to 8 is adopted.

10. The vanadium-nitrogen alloy wet pellet drying production equipment as claimed in claim 9, wherein the production equipment comprises a pushed slab kiln main kiln and a pushed slab kiln secondary kiln which is arranged at the inlet end of the pushed slab kiln main kiln and forms a closed cycle with the pushed slab kiln main kiln, and the pushed slab kiln secondary kiln is a non-sealed pushed slab kiln or a tunnel kiln.

11. The vanadium-nitrogen alloy wet pellet drying production equipment as claimed in claim 10, wherein the pushed slab kiln secondary kiln is composed of a drying section for drying the vanadium-nitrogen alloy wet pellets, a charge preparation section arranged at an inlet of the pushed slab kiln drying section and a finished product cooling section arranged between an outlet of a finished product of the pushed slab kiln main kiln and the charge preparation section.

12. The production facility for drying vanadium-nitrogen alloy wet pellets according to claim 9, characterized in that the production facility further comprises an electric control device, a propelling device controlled by the electric control device according to a set program, and a charging device for transferring the vanadium-nitrogen alloy wet pellets to a crucible by the electric control device according to a set program.

13. The production equipment for drying the vanadium-nitrogen alloy wet pellets according to claim 12, wherein the propulsion device is one or more of hydraulic propulsion, hinge propulsion, stepping motor propulsion and belt propulsion.

Technical Field

The invention relates to the field of vanadium-nitrogen alloy production, in particular to a method for drying wet pellets of a vanadium-nitrogen alloy and production equipment thereof.

Background

The original drying technology of the vanadium-nitrogen alloy wet material balls adopts a two-hole tunnel drying kiln technology: and (2) loading the wet material balls into a drying vehicle, manually pushing the drying vehicle into a two-hole tunnel drying kiln or a three-hole tunnel drying kiln, drying for 48 hours in the drying kiln, then pulling out the drying kiln by using a winch, then pouring the dry material balls in the drying vehicle onto a transfer trolley by using a crane, transferring the dry material balls to a pushed slab kiln workshop, and manually shoveling the dry material balls into a crucible by using an iron shovel. The process technology has the following defects: the two-hole tunnel drying kiln or the three-hole tunnel drying kiln has low heat utilization efficiency, needs to be cooled after drying, cannot realize hot charging and is not beneficial to energy conservation; the turnover field of the drying vehicle is large, the one-time investment is high, and a drying workshop needs to be independently constructed; the dried material balls need to be poured out of the drying vehicle and then put into the crucible, and the material pouring process has heavy dust, so that the operation environment is poor; the whole process is manually operated, and the labor intensity is high.

Disclosure of Invention

The invention aims to provide a method for drying vanadium-nitrogen alloy wet pellets and production equipment thereof aiming at the defects in the prior art.

In order to achieve the purpose, the invention provides a method for drying vanadium-nitrogen alloy wet pellets, which comprises the steps of arranging a pushed slab kiln auxiliary kiln for drying at the external circulation inlet end of a pushed slab kiln main kiln, and loading the vanadium-nitrogen alloy wet pellets into a crucible; pushing the crucible filled with the vanadium-nitrogen alloy wet material balls into the pushed slab kiln secondary kiln by using a pushing device; protective gas is sent into the auxiliary kiln of the pushed slab kiln, and the wet vanadium-nitrogen alloy pellets in the auxiliary kiln of the pushed slab kiln are heated and dried by a heating device; and further pushing the vanadium-nitrogen alloy wet pellets dried by the auxiliary kiln of the pushed slab kiln into the main kiln of the pushed slab kiln by using the pushing device to perform reduction nitriding treatment.

Further, the crucible filled with the vanadium-nitrogen alloy wet material balls is pushed into the pushed slab kiln secondary kiln by the pushing device, and the pushing speed of the pushing device is controlled to be any one of 14 min/slab to 17 min/slab

Further, the pushing speed is any one of 14 min/plate, 14.5 min/plate, 15 min/plate, 15.5 min/plate, 16 min/plate and 17 min/plate, and the pushed plate kiln is pushed into the pushed plate kiln auxiliary kiln for drying.

Further, the pushing speed of pushing the crucible containing the wet vanadium-nitrogen alloy pellets into the auxiliary pushed slab kiln by using the pushing device is consistent with the pushing speed of further pushing the wet vanadium-nitrogen alloy pellets dried by the auxiliary pushed slab kiln into the main pushed slab kiln.

Further, the stable working temperature for heating and drying the pushed slab kiln secondary kiln is controlled between 180 ℃ and 200 ℃.

Furthermore, positive pressure is always kept in the pushed slab kiln auxiliary kiln.

Further, the protective gas is a neutral gas or a reducing gas containing nitrogen.

Furthermore, the propulsion device and the heating device are controlled by an electric control device according to a set program.

The second vanadium-nitrogen alloy wet pellet drying production equipment comprises a pushed slab kiln main kiln and a pushed slab kiln secondary kiln which is arranged at the inlet end of the pushed slab kiln main kiln and forms closed circulation with the pushed slab kiln main kiln, wherein the pushed slab kiln secondary kiln is a non-sealed pushed slab kiln or a tunnel kiln.

Furthermore, the pushed slab kiln auxiliary kiln consists of a drying section for drying the vanadium-nitrogen alloy wet pellets, a charging preparation section arranged at an inlet of the drying section of the pushed slab kiln and a finished product cooling section arranged between an outlet of a finished product of the pushed slab kiln main kiln and the charging preparation section.

Further, the production equipment further comprises an electric control device, a propelling device controlled by the electric control device according to a set program, and a charging device for transferring the vanadium-nitrogen alloy wet material into the crucible by the electric control device according to the set program.

Further, the propelling device is one or more of a hydraulic propelling mode, a hinge propelling mode, a stepping motor propelling mode and a belt propelling mode.

In conclusion, the method and the production equipment for drying the wet vanadium-nitrogen alloy pellets realize the pre-drying of the wet pellets in an online auxiliary kiln drying mode, and then directly push the pellets pre-dried in the auxiliary kiln of the pushed slab kiln into the main kiln of the pushed slab kiln, so that the heat in the drying process of the auxiliary kiln of the pushed slab kiln is fully utilized, and the energy conservation and consumption reduction are realized; wet pellets are directly loaded into the crucible and dried in the secondary kiln of the pushed slab kiln, and then are directly pushed into the main kiln of the pushed slab kiln without dumping, so that the problem of dust emission in the production field is avoided, and the field operation environment is greatly improved; meanwhile, the damage of the material ball integrity in the material pouring process is avoided, and the surface appearance quality of the product is improved.

Detailed Description

In order to explain the technical content, structural features, and objects and effects of the present invention in detail, the following embodiments are described in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific implementation details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus, and in the absence of further limitation, the element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises such elements.

The invention relates to a method for drying vanadium-nitrogen alloy wet material balls, which comprises the following steps,

step S1: mixing materials according to a preset water adding coefficient formula, and dehydrating the vanadium-nitrogen alloy wet pellets in a drying and curing mode;

step S2: arranging a pushed slab kiln secondary kiln for drying at the external circulation inlet end of the pushed slab kiln main kiln, and loading vanadium-nitrogen alloy wet pellets into a crucible by using a loading device;

step S3: pushing the crucible filled with the vanadium-nitrogen alloy wet material balls into the pushed slab kiln secondary kiln by using a pushing device;

step S4: protective gas is sent into the auxiliary kiln of the pushed slab kiln, and the wet vanadium-nitrogen alloy pellets in the auxiliary kiln of the pushed slab kiln are heated and dried by a heating device;

step S5: and the pushing device is utilized to further push the vanadium-nitrogen alloy wet material dried by the auxiliary kiln of the pushed slab kiln into the main kiln of the pushed slab kiln for reduction and nitridation treatment.

In a preferred embodiment, the pushing device pushes the crucible filled with the vanadium-nitrogen alloy wet material into the pushed slab kiln secondary kiln, and the pushing speed of the pushing device is controlled to be any one of 14 min/slab to 17 min/slab.

In a preferred embodiment, the pushing speed is any one of the six pushing speeds of 14 min/plate, 14.5 min/plate, 15 min/plate, 15.5 min/plate, 16 min/plate and 17 min/plate, and the pushed slab kiln is pushed into the pushed slab kiln auxiliary kiln for drying.

In a preferred embodiment, the pushing speed of the crucible containing the wet vanadium-nitrogen alloy pellets into the secondary pushed slab kiln by using the pushing device is consistent with the pushing speed of the wet vanadium-nitrogen alloy pellets further pushed into the main pushed slab kiln after being dried by the secondary pushed slab kiln.

In a preferred embodiment, the stable working temperature for heating and drying the pushed slab kiln secondary kiln is controlled between 180 ℃ and 200 ℃.

In a preferred embodiment, the pushed slab kiln secondary kiln needs to be maintained at positive pressure at all times.

In a preferred embodiment, the protective gas is a neutral gas or a reducing gas containing nitrogen.

In a preferred embodiment, the propulsion device and the heating device are controlled by an electric control device according to a set program.

In a preferred embodiment, the water adding coefficient is 7%, and the dehydration rate of the vanadium-nitrogen alloy wet pellet subjected to dehydration treatment by a shade drying solidification mode is 0.8%.

The second production equipment for drying the vanadium-nitrogen alloy wet pellets comprises a pushed slab kiln main kiln and a pushed slab kiln secondary kiln which is arranged at the external circulation inlet end of the pushed slab kiln main kiln and forms closed circulation with the pushed slab kiln main kiln.

In a preferred embodiment, the pushed slab kiln secondary kiln is composed of a drying section for drying the vanadium-nitrogen alloy wet pellets, a charging preparation section arranged at the inlet of the drying section of the pushed slab kiln, and a finished product cooling section arranged between the finished product outlet of the pushed slab kiln main kiln and the charging preparation section.

In a preferred embodiment, the production equipment further comprises an electric control device, a propelling device controlled by the electric control device according to a set program, and a charging device for transferring the vanadium-nitrogen alloy wet material into a crucible by the electric control device according to the set program.

In a preferred embodiment, the propulsion means is one or more of hydraulic propulsion, hinged propulsion, stepper motor propulsion, belt propulsion.

In a preferred embodiment, the kiln body of the pushed slab kiln main kiln is formed by a double-layer structure with an inner layer made of lining refractory bricks and an outer layer made of a steel shell, an air draft dust removal pipeline is arranged at the top of the kiln body of the pushed slab kiln main kiln, and a nitrogen pipeline and a cooling water pipeline are arranged on the side wall of the kiln body of the pushed slab kiln main kiln.

In a preferred embodiment, the pushed slab kiln main kiln is evacuated from air by using nitrogen in the reduction and nitridation production process, and the kiln body of the pushed slab kiln main kiln is in a closed state in the production process.

In a preferred embodiment, a detection device for monitoring the pressure of a nitrogen pipeline and a detection device for monitoring the oxygen content are further arranged on the pushed slab kiln main kiln.

In a preferred embodiment, a push rod device is arranged at the outlet end of the main kiln of the pushed slab kiln and used for pushing vanadium-nitrogen alloy finished pellets generated by reduction and nitridation treatment in the main kiln of the pushed slab kiln to a finished product cooling section of the auxiliary kiln of the pushed slab kiln for cooling, and the cooled finished pellets are transported to a packaging room for packaging.

In a preferred embodiment, production control, data acquisition, process parameter and control program storage and operation control of the production equipment are all completed by the electrical control device.

In a preferred embodiment, the pushed slab kiln secondary kiln is a non-sealed pushed slab kiln or a tunnel kiln, and protective gas is introduced for drying after air in the pushed slab kiln secondary kiln is exhausted in the drying process, wherein the introduction amount of the protective gas is always kept to be that the pressure in the pushed slab kiln secondary kiln is slightly greater than the pressure outside the pushed slab kiln secondary kiln, and the protective gas is nitrogen-containing neutral gas or reducing gas.

In a preferred embodiment, the pushed slab kiln secondary kiln is a pushed slab kiln or a tunnel kiln with a sealing structure, and is in a sealing state in the drying process, after the air in the pushed slab kiln secondary kiln is evacuated, protective gas is introduced and dried, and the protective gas is neutral gas or reducing gas containing nitrogen.

In conclusion, the method and the production equipment for drying the wet vanadium-nitrogen alloy pellets realize the pre-drying of the wet pellets in an online auxiliary kiln drying mode, and then directly push the pellets pre-dried in the auxiliary kiln of the pushed slab kiln into the main kiln of the pushed slab kiln, so that the heat in the drying process of the auxiliary kiln of the pushed slab kiln is fully utilized, and the energy conservation and consumption reduction are realized; wet pellets are directly loaded into the crucible and dried in the secondary kiln of the pushed slab kiln, and then are directly pushed into the main kiln of the pushed slab kiln without dumping, so that the problem of dust emission in the production field is avoided, and the field operation environment is greatly improved; meanwhile, the damage of the material ball integrity in the material pouring process is avoided, and the surface appearance quality of the product is improved.

It is to be understood that the invention is not limited to the precise arrangements and instrumentalities described above. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.

It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.

As described above, only the preferred embodiments of the present invention are shown, and it is clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any equivalent modifications or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.