阅读说明：本技术 一种钒渣合成钒氮合金的制备方法 (Preparation method for synthesizing vanadium-nitrogen alloy from vanadium slag ) 是由 林学娟 于 2021-08-05 设计创作，主要内容包括：本发明公开了一种钒渣合成钒氮合金的制备方法,包括以下步骤：S1、根据设计标准,对钒渣、氮化铁、氮化镁进行称取,对钒渣进行清水冲洗处理,冲洗后进行利用烘干机进行烘干处理,烘干后的钒渣与氮化铁、氮化镁进行混合,混合后进行粉碎处理,粉碎后使用30-50目的筛分网进行筛选处理,未筛分成功的钒渣继续粉碎,粉碎后继续筛选,得到一号混料,S2、对还原剂、松散剂、铝粉进行称取,本发明的有益效果是：通过加入了氮化铁、氮化镁,实现了对钒氮合金的制备效率提升,通过加入了还原剂,实现了碘化钾、硫化钠对钒渣料的还原作用,提高了生产的效率,通过加入了白刚玉微粉磨料、耐磨剂,实现了对钒氮合金的稳定性进一步增强。(The invention discloses a preparation method for synthesizing vanadium-nitrogen alloy from vanadium slag, which comprises the following steps: s1, according to design standards, weighing vanadium slag, iron nitride and magnesium nitride, washing the vanadium slag with clear water, drying the washed vanadium slag by using a dryer, mixing the dried vanadium slag with the iron nitride and the magnesium nitride, crushing the mixture, screening the crushed vanadium slag by using a 30-50-mesh screening net, continuously crushing the vanadium slag which is not successfully screened, continuously screening the crushed vanadium slag to obtain a first mixed material, and S2, weighing a reducing agent, a loosening agent and aluminum powder, wherein the beneficial effects of the invention are as follows: the preparation efficiency of the vanadium-nitrogen alloy is improved by adding the iron nitride and the magnesium nitride, the reduction effect of potassium iodide and sodium sulfide on the vanadium slag is realized by adding the reducing agent, the production efficiency is improved, and the stability of the vanadium-nitrogen alloy is further enhanced by adding the white corundum micro-powder grinding material and the wear-resisting agent.)

1. The preparation method for synthesizing the vanadium-nitrogen alloy from the vanadium slag is characterized by comprising the following steps of:

s1, weighing vanadium slag, iron nitride and magnesium nitride according to design standards, washing the vanadium slag with clear water, drying the washed vanadium slag by using a dryer, mixing the dried vanadium slag with the iron nitride and the magnesium nitride, crushing the mixture, screening the crushed vanadium slag by using a 30-50-mesh screening net, continuously crushing the vanadium slag which is not successfully screened, and continuously screening the crushed vanadium slag to obtain a first mixed material;

s2, weighing the reducing agent, the loosening agent and the aluminum powder, mixing and stirring the reducing agent and the mixed material obtained in the step S1 for 20-50min at the stirring speed of 100-250r/min, adding the loosening agent and the aluminum powder after mixing is finished, and continuing heating, mixing and stirring for 10-20 min. Stirring at 80-180r/min and heating at 80-170 deg.C to obtain a second mixture;

s3, weighing manganese ore, a white corundum micro-powder grinding material, an anti-wear agent and a sodium silicate aqueous solution, roasting the manganese ore by using roasting equipment, crushing and screening the roasted manganese ore, wherein the crushing particle size is 90-170 meshes, desliming the manganese ore after screening, mixing the manganese ore, the white corundum micro-powder grinding material and the anti-wear agent, uniformly mixing the manganese ore, the white corundum micro-powder grinding material and the anti-wear agent, mixing the manganese ore, the white corundum micro-powder grinding material and the anti-wear agent with the mixture II obtained in S2, adding the sodium silicate aqueous solution, and mixing for 20-55min to obtain a mixture III;

s4, putting the third mixed material obtained in the step S3 into a double-roller ball pressing device, pressing the third mixed material into particles, and drying and heating the particles after pressing, wherein the drying temperature is 150-290 ℃;

s5, weighing the fluxing agent, the alumina and the acrylamide, mixing the weighed fluxing agent and the weighed alumina with the particles obtained in the step S4, uniformly mixing, adding the acrylamide, continuously stirring and mixing at the stirring speed of 60-180r/min for 20-55min, pressing the mixture into particles again after the mixing is finished, putting the particles into a tubular calcining furnace for calcining, simultaneously inputting nitrogen gas into the tubular calcining furnace during calcining, calcining at the calcining temperature of 600-1300 ℃ for 1-6h in the nitrogen atmosphere, taking out the particles after the calcining is finished, and cooling to obtain the vanadium-nitrogen alloy.

2. The method for preparing the vanadium-nitrogen alloy synthesized from vanadium slag according to claim 1, which is characterized by comprising the following steps: the raw materials in the S1 comprise the following components in percentage by mass: 50-140 parts of vanadium slag, 30-45 parts of iron nitride and 15-40 parts of magnesium nitride.

3. The method for preparing the vanadium-nitrogen alloy synthesized from vanadium slag according to claim 1, which is characterized by comprising the following steps: the raw materials in the S2 comprise the following components in percentage by mass: 5-9 parts of reducing agent, 2.5-5 parts of loosening agent and 5-15 parts of aluminum powder.

4. The method for preparing the vanadium-nitrogen alloy synthesized from vanadium slag according to claim 1, which is characterized by comprising the following steps: the raw materials in the S3 comprise the following components in percentage by mass: 10-20 parts of manganese ore, 5-15 parts of white corundum micro-powder grinding material, 10-20 parts of wear-resisting agent and 10-20 parts of sodium silicate aqueous solution.

5. The method for preparing the vanadium-nitrogen alloy synthesized from vanadium slag according to claim 1, which is characterized by comprising the following steps: the raw materials in the S5 comprise the following components in percentage by mass: 5-10 parts of fluxing agent, 10-20 parts of alumina and 6-15 parts of acrylamide.

6. The method for preparing the vanadium-nitrogen alloy synthesized from vanadium slag according to claim 1, which is characterized by comprising the following steps: the reducing agent is one of potassium iodide and sodium sulfide.

7. The method for preparing the vanadium-nitrogen alloy synthesized from vanadium slag according to claim 1, which is characterized by comprising the following steps: the white corundum micropowder abrasive is prepared by grinding white corundum with a grinding machine, further performing magnetic separation, acid washing and processing.

8. The method for preparing the vanadium-nitrogen alloy synthesized from vanadium slag according to claim 1, which is characterized by comprising the following steps: the wear-resisting agent is one or a mixture of vanadium powder and nickel-based powder.

9. The method for preparing the vanadium-nitrogen alloy synthesized from vanadium slag according to claim 1, which is characterized by comprising the following steps: the loosening agent is ammonium chloride.

10. The method for preparing the vanadium-nitrogen alloy synthesized from vanadium slag according to claim 1, which is characterized by comprising the following steps: the fluxing agent is one of silicon dioxide, calcium oxide and magnesium oxide.

Technical Field

The invention relates to the technical field of vanadium-nitrogen alloys, in particular to a preparation method for synthesizing a vanadium-nitrogen alloy from vanadium slag.

Background

Vanadium slag, which is vanadium oxide-containing slag obtained by oxidizing and converting vanadium-containing molten iron in the vanadium extraction process or vanadium-containing iron concentrate obtained by wet vanadium extraction, wherein the alloy is a substance with metal characteristics formed by mixing two or more chemical substances (at least one component is metal), the microstructure of the alloy of a solid solution has a single phase, the alloy of a part of the solution has two or more phases, the distribution of the alloy can be homogeneous or not, and the intermetallic compound generally has one alloy or pure metal wrapped in the other pure metal according to the temperature change of the material cooling process, so that the alloy is widely applied;

in current vanadium slag collection, need carry out reutilization and make vanadium nitrogen alloy to the vanadium slag, but in the preparation of the synthetic vanadium nitrogen alloy of current vanadium slag, be not convenient for promote stability, the durability of vanadium nitrogen alloy, the synthetic process of the synthetic vanadium nitrogen alloy of current vanadium slag is comparatively difficult, the efficiency of processing is lower.

Disclosure of Invention

The invention aims to provide a preparation method for synthesizing vanadium-nitrogen alloy from vanadium slag, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides a preparation method for synthesizing vanadium-nitrogen alloy from vanadium slag, which comprises the following steps:

s1, weighing vanadium slag, iron nitride and magnesium nitride according to design standards, washing the vanadium slag with clear water, drying the washed vanadium slag by using a dryer, mixing the dried vanadium slag with the iron nitride and the magnesium nitride, crushing the mixture, screening the crushed vanadium slag by using a 30-50-mesh screening net, continuously crushing the vanadium slag which is not successfully screened, and continuously screening the crushed vanadium slag to obtain a first mixed material;

s2, weighing the reducing agent, the loosening agent and the aluminum powder, mixing and stirring the reducing agent and the mixed material obtained in the step S1 for 20-50min at the stirring speed of 100-250r/min, adding the loosening agent and the aluminum powder after mixing is finished, and continuing heating, mixing and stirring for 10-20 min. Stirring at 80-180r/min and heating at 80-170 deg.C to obtain a second mixture;

s3, weighing manganese ore, a white corundum micro-powder grinding material, an anti-wear agent and a sodium silicate aqueous solution, roasting the manganese ore by using roasting equipment, crushing and screening the roasted manganese ore, wherein the crushing particle size is 90-170 meshes, desliming the manganese ore after screening, mixing the manganese ore, the white corundum micro-powder grinding material and the anti-wear agent, uniformly mixing the manganese ore, the white corundum micro-powder grinding material and the anti-wear agent, mixing the manganese ore, the white corundum micro-powder grinding material and the anti-wear agent with the mixture II obtained in S2, adding the sodium silicate aqueous solution, and mixing for 20-55min to obtain a mixture III;

s4, putting the third mixed material obtained in the step S3 into a double-roller ball pressing device, pressing the third mixed material into particles, and drying and heating the particles after pressing, wherein the drying temperature is 150-290 ℃;

s5, weighing the fluxing agent, the alumina and the acrylamide, mixing the weighed fluxing agent and the weighed alumina with the particles obtained in the step S4, uniformly mixing, adding the acrylamide, continuously stirring and mixing at the stirring speed of 60-180r/min for 20-55min, pressing the mixture into particles again after the mixing is finished, putting the particles into a tubular calcining furnace for calcining, simultaneously inputting nitrogen gas into the tubular calcining furnace during calcining, calcining at the calcining temperature of 600-1300 ℃ for 1-6h in the nitrogen atmosphere, taking out the particles after the calcining is finished, and cooling to obtain the vanadium-nitrogen alloy.

Preferably, the raw materials in the S2 comprise the following components in percentage by mass: 5-9 parts of reducing agent, 2.5-5 parts of loosening agent and 5-15 parts of aluminum powder.

Preferably, the raw materials in the S3 comprise the following components in percentage by mass: 10-20 parts of manganese ore, 5-15 parts of white corundum micro-powder grinding material, 10-20 parts of wear-resisting agent and 10-20 parts of sodium silicate aqueous solution.

Preferably, the raw materials in the S5 comprise the following components in percentage by mass: 5-10 parts of fluxing agent, 10-20 parts of alumina and 6-15 parts of acrylamide.

Preferably, the reducing agent is one of potassium iodide and sodium sulfide.

Preferably, the white corundum micropowder abrasive is prepared by grinding white corundum with a grinder, further performing magnetic separation and acid washing, and processing.

Preferably, the anti-wear agent is one or a mixture of vanadium powder and nickel-based powder.

Preferably, the loosening agent is ammonium chloride.

Preferably, the flux is one of silicon dioxide, calcium oxide and magnesium oxide.

Compared with the prior art, the invention has the beneficial effects that: the preparation efficiency of the vanadium-nitrogen alloy is improved by adding the iron nitride and the magnesium nitride, the reduction effect of potassium iodide and sodium sulfide on the vanadium slag is realized by adding the reducing agent, the production efficiency is improved, the stability of the vanadium-nitrogen alloy is further enhanced by adding the white corundum micro-powder grinding material and the wear-resisting agent, the durability is improved, and the efficiency of silicon dioxide, calcium oxide and magnesium oxide during roasting is improved by adding the fluxing agent.

Detailed Description

The invention provides a technical scheme that: a preparation method for synthesizing vanadium-nitrogen alloy from vanadium slag comprises the following steps:

s1, weighing vanadium slag, iron nitride and magnesium nitride according to design standards, washing the vanadium slag with clear water, drying the washed vanadium slag by using a dryer, mixing the dried vanadium slag with the iron nitride and the magnesium nitride, crushing the mixture, screening the crushed vanadium slag by using a 30-50-mesh screening net, continuously crushing the vanadium slag which is not successfully screened, and continuously screening the crushed vanadium slag to obtain a first mixed material;

s2, weighing the reducing agent, the loosening agent and the aluminum powder, mixing and stirring the reducing agent and the mixed material obtained in the step S1 for 20-50min at the stirring speed of 100-250r/min, adding the loosening agent and the aluminum powder after mixing is finished, and continuing heating, mixing and stirring for 10-20 min. Stirring at 80-180r/min and heating at 80-170 deg.C to obtain a second mixture;

s3, weighing manganese ore, a white corundum micro-powder grinding material, an anti-wear agent and a sodium silicate aqueous solution, roasting the manganese ore by using roasting equipment, crushing and screening the roasted manganese ore, wherein the crushing particle size is 90-170 meshes, desliming the manganese ore after screening, mixing the manganese ore, the white corundum micro-powder grinding material and the anti-wear agent, uniformly mixing the manganese ore, the white corundum micro-powder grinding material and the anti-wear agent, mixing the manganese ore, the white corundum micro-powder grinding material and the anti-wear agent with the mixture II obtained in S2, adding the sodium silicate aqueous solution, and mixing for 20-55min to obtain a mixture III;

s4, putting the third mixed material obtained in the step S3 into a double-roller ball pressing device, pressing the third mixed material into particles, and drying and heating the particles after pressing, wherein the drying temperature is 150-290 ℃;

s5, weighing the fluxing agent, the alumina and the acrylamide, mixing the weighed fluxing agent and the weighed alumina with the particles obtained in the step S4, uniformly mixing, adding the acrylamide, continuously stirring and mixing at the stirring speed of 60-180r/min for 20-55min, pressing the mixture into particles again after the mixing is finished, putting the particles into a tubular calcining furnace for calcining, simultaneously inputting nitrogen gas into the tubular calcining furnace during calcining, calcining at the calcining temperature of 600-1300 ℃ for 1-6h in the nitrogen atmosphere, taking out the particles after the calcining is finished, and cooling to obtain the vanadium-nitrogen alloy.

Wherein the raw materials in the S1 comprise the following components in percentage by mass: 50-140 parts of vanadium slag, 30-45 parts of iron nitride and 15-40 parts of magnesium nitride.

Wherein the raw materials in the S2 comprise the following components in percentage by mass: 5-9 parts of reducing agent, 2.5-5 parts of loosening agent and 5-15 parts of aluminum powder.

The raw materials in the A1 comprise the following components in percentage by mass: urea-formaldehyde resin adhesive: 1% -50%, polyimide glue: 1% -30%, ethanol: 1% -30%, wherein the raw materials in the A2 comprise the following components in percentage by mass: antimony trioxide: 1 to 25 percent.

Wherein the raw materials in the S3 comprise the following components in percentage by mass: 10-20 parts of manganese ore, 5-15 parts of white corundum micro-powder grinding material, 10-20 parts of wear-resisting agent and 10-20 parts of sodium silicate aqueous solution.

Wherein the raw materials in the S5 comprise the following components in percentage by mass: 5-10 parts of fluxing agent, 10-20 parts of alumina and 6-15 parts of acrylamide.

Wherein the reducing agent is one of potassium iodide and sodium sulfide.

The white corundum micro powder abrasive is prepared by grinding white corundum through a grinding machine, further performing magnetic separation, acid washing and processing.

Wherein, the wear-resisting agent is one or a mixture of vanadium powder and nickel-based powder.

Wherein the loosening agent is ammonium chloride.

Wherein the fluxing agent is one of silicon dioxide, calcium oxide and magnesium oxide.

Example 1, the raw materials in parts by mass are: 50 parts of vanadium slag, 30 parts of iron nitride, 15 parts of magnesium nitride, 5 parts of potassium iodide, 2.5 parts of ammonium chloride, 5 parts of aluminum powder, 10 parts of manganese ore, 5 parts of white corundum micro-powder grinding material, 10 parts of nickel-based powder, 10 parts of sodium silicate aqueous solution, 5 parts of silicon dioxide, 10 parts of aluminum oxide and 6 parts of acrylamide.

A preparation method for synthesizing vanadium-nitrogen alloy from vanadium slag comprises the following steps:

s1, weighing vanadium slag, iron nitride and magnesium nitride according to design standards, washing the vanadium slag with clear water, drying the washed vanadium slag by using a dryer, mixing the dried vanadium slag with the iron nitride and the magnesium nitride, crushing the mixture, screening the crushed vanadium slag by using a 30-mesh screening net, continuously crushing the vanadium slag which is not successfully screened, and continuously screening the crushed vanadium slag to obtain a first mixed material;

s2, weighing potassium iodide, ammonium chloride and aluminum powder, mixing and stirring the potassium iodide and the mixed material obtained in the step S1 for 20min at a stirring speed of 100r/min, adding the ammonium chloride and the aluminum powder after mixing, and continuing heating, mixing and stirring for 10 min. Stirring at 80r/min and heating at 80 deg.C to obtain a second mixture;

s3, weighing manganese ore, white corundum micro-powder grinding materials, nickel-based powder and sodium silicate aqueous solution, roasting the manganese ore by using roasting equipment, crushing and screening the roasted manganese ore, wherein the crushed particle size is 90 meshes, desliming the manganese ore after screening, mixing the treated manganese ore, the white corundum micro-powder grinding materials and the nickel-based powder, uniformly mixing the manganese ore, the white corundum micro-powder grinding materials and the nickel-based powder, mixing the mixture with the second mixed material obtained in S2, adding the sodium silicate aqueous solution, and mixing for 20min to obtain a third mixed material;

s4, putting the third mixed material obtained in the step S3 into a double-roller ball pressing device, pressing the third mixed material into particles, and drying and heating the particles after pressing, wherein the drying temperature is 150 ℃;

s5, weighing silicon dioxide, aluminum oxide and acrylamide, mixing the weighed silicon dioxide and aluminum oxide with the particles obtained in the step S4, uniformly mixing, adding acrylamide, continuously stirring and mixing, wherein the stirring speed is 60r/min, the stirring time is 20min, after mixing, pressing the mixture into particles again, putting the particles into a tubular calcining furnace for calcining, meanwhile, inputting nitrogen into the tubular calcining furnace for calcining under the nitrogen atmosphere, the calcining temperature is 600 ℃, the calcining time is 1h, and after calcining, taking out and cooling the particles to obtain the vanadium-nitrogen alloy.

Example 2, the raw materials in parts by mass are: 140 parts of vanadium slag, 45 parts of iron nitride, 40 parts of magnesium nitride, 9 parts of potassium iodide, 5 parts of ammonium chloride, 15 parts of aluminum powder, 20 parts of manganese ore, 15 parts of white corundum micro-powder grinding material, 20 parts of nickel-based powder, 20 parts of sodium silicate aqueous solution, 10 parts of silicon dioxide, 20 parts of aluminum oxide and 15 parts of acrylamide.

A preparation method for synthesizing vanadium-nitrogen alloy from vanadium slag comprises the following steps:

s1, weighing vanadium slag, iron nitride and magnesium nitride according to design standards, washing the vanadium slag with clear water, drying the washed vanadium slag by using a dryer, mixing the dried vanadium slag with the iron nitride and the magnesium nitride, crushing the mixture, screening the crushed vanadium slag by using a 50-mesh screening net, continuously crushing the vanadium slag which is not successfully screened, and continuously screening the crushed vanadium slag to obtain a first mixed material;

s2, weighing potassium iodide, ammonium chloride and aluminum powder, mixing and stirring the potassium iodide and the mixed material obtained in the step S1 for 50min at a stirring speed of 250r/min, adding the ammonium chloride and the aluminum powder after mixing, and continuing heating, mixing and stirring for 20 min. Stirring at the rotation speed of 180r/min and the heating temperature of 170 ℃, and mixing to obtain a second mixed material;

s3, weighing manganese ore, white corundum micro-powder grinding materials, nickel-based powder and sodium silicate aqueous solution, roasting the manganese ore by using roasting equipment, crushing and screening the roasted manganese ore, wherein the crushed particle size is 170 meshes, performing desliming treatment after screening, mixing the treated manganese ore, the white corundum micro-powder grinding materials and the nickel-based powder, uniformly mixing the manganese ore, the white corundum micro-powder grinding materials and the nickel-based powder, mixing the mixture with the No. two mixed material obtained in S2, adding the sodium silicate aqueous solution, and mixing for 55min to obtain a No. three mixed material;

s4, putting the third mixed material obtained in the step S3 into a double-roller ball pressing device, pressing the third mixed material into particles, and drying and heating the particles after pressing, wherein the drying temperature is 290 ℃;

s5, weighing silicon dioxide, aluminum oxide and acrylamide, mixing the weighed silicon dioxide and aluminum oxide with the particles obtained in the step S4, uniformly mixing, adding acrylamide, continuously stirring and mixing, wherein the stirring speed is 180r/min, the stirring time is 55min, pressing the mixture into particles again after mixing is finished, putting the particles into a tubular calcining furnace for calcining, meanwhile, inputting nitrogen into the tubular calcining furnace for calcining under the nitrogen atmosphere, the calcining temperature is 1300 ℃, the calcining time is 6h, taking out the particles after calcining is finished, and cooling the particles to obtain the vanadium-nitrogen alloy.

Example 3, the raw materials by mass percent are: 90 parts of vanadium slag, 40 parts of iron nitride, 30 parts of magnesium nitride, 7 parts of potassium iodide, 4 parts of ammonium chloride, 10 parts of aluminum powder, 15 parts of manganese ore, 10 parts of white corundum micro-powder grinding material, 15 parts of nickel-based powder, 15 parts of sodium silicate aqueous solution, 7 parts of silicon dioxide, 15 parts of aluminum oxide and 11 parts of acrylamide.

A preparation method for synthesizing vanadium-nitrogen alloy from vanadium slag comprises the following steps:

s1, weighing vanadium slag, iron nitride and magnesium nitride according to design standards, washing the vanadium slag with clear water, drying the washed vanadium slag by using a dryer, mixing the dried vanadium slag with the iron nitride and the magnesium nitride, crushing the mixture, screening the crushed vanadium slag by using a 40-mesh screening net, continuously crushing the vanadium slag which is not successfully screened, and continuously screening the crushed vanadium slag to obtain a first mixed material;

s2, weighing potassium iodide, ammonium chloride and aluminum powder, mixing and stirring the potassium iodide and the mixed material obtained in the step S1 for 40min at the stirring speed of 170r/min, adding the ammonium chloride and the aluminum powder after mixing, and continuing heating, mixing and stirring for 15 min. Stirring at 140r/min and heating at 130 deg.C to obtain a second mixture;

s3, weighing manganese ore, white corundum micro-powder grinding materials, nickel-based powder and sodium silicate aqueous solution, roasting the manganese ore by using roasting equipment, crushing and screening the roasted manganese ore, wherein the crushed particle size is 140 meshes, desliming the manganese ore after screening, mixing the treated manganese ore, the white corundum micro-powder grinding materials and the nickel-based powder, uniformly mixing the manganese ore, the white corundum micro-powder grinding materials and the nickel-based powder, mixing the mixture with the No. two mixed materials obtained in S2, adding the sodium silicate aqueous solution, and mixing for 40min to obtain No. three mixed materials;

s4, putting the third mixed material obtained in the step S3 into a double-roller ball pressing device, pressing the third mixed material into particles, and drying and heating the particles after pressing, wherein the drying temperature is 220 ℃;

s5, weighing silicon dioxide, aluminum oxide and acrylamide, mixing the weighed silicon dioxide and aluminum oxide with the particles obtained in the step S4, uniformly mixing, adding acrylamide, continuously stirring and mixing, wherein the stirring speed is 130r/min, the stirring time is 40min, pressing the mixture into particles again after mixing is finished, putting the particles into a tubular calcining furnace for calcining, meanwhile, inputting nitrogen into the tubular calcining furnace for calcining under the nitrogen atmosphere, the calcining temperature is 1000 ℃, the calcining time is 3.5h, taking out the particles after calcining is finished, and cooling the particles to obtain the vanadium-nitrogen alloy.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.