CN103966465B - A recycling and remelting process of titanium shavings - Google Patents

Abstract

The hair ingot surface plane Milling Machining and the ends cutting that the present invention relates to a kind of titanium ingot founding production produce a large amount of titanium bits treatment process.The technical solution used in the present invention is: a kind of titanium bits reclaim remelting processing, it is characterized in that, this titanium bits reclaim remelting processing and are: pulverizing → screening → cleaning → draining → oven dry → magnetic separation → packing → secondary drying → enter stove.A kind of titanium bits of the present invention reclaim remelting processing, for the bits material secondary that titanium metal founding produces plane Milling Machining, ends cutting produces melts down the processing scheme that founding provides a set of safe, reliable, practical, high-level efficiency, low cost, whole process is required manually less, consuming time short.Meanwhile, device space compact in design, rationally, flow process is coherent, simple operation, process are thorough, can meet the demand that general Tai Ding founding manufacturing enterprise bits material reclaims re melting process.

Description

A recycling and remelting process of titanium shavings

technical field

The invention relates to a process for treating a large amount of titanium chips produced by surface planing and milling of rough ingots produced by melting and casting of titanium ingots and end face cutting.

Background technique

Titanium metal is easy to oxidize and burn. Titanium ingot melting and casting production needs to be carried out in a high vacuum environment to avoid the oxidation of titanium metal and the influence of gas on high-voltage arc or high-voltage electron beam during smelting. The current mainstream melting and casting equipment in the world is mainly vacuum self-consumption. Furnace and electron beam melting furnace, while the latter has a strong technical advantage for the remelting of titanium recyclate and scrap. The surface planing and milling of the ingot and the section cutting produce a large amount of titanium chips, and the doping of non-metallic elements such as C, H, O, N and other metal elements such as Fe and Zn will affect the high-voltage arc or high-voltage electron beam. Seriously, it affects the physical properties of titanium, which leads to the decline of product quality. Therefore, the control of these other chemical elements is very important in the production process of titanium ingot melting and casting, and the production of titanium scraps is inevitable from the source. Mechanical oil , saponification liquid, dust, etc., and many pollutants such as tiny parts of equipment are mixed into it. Due to the extremely high vacuum requirements of melting and casting equipment and the complex machining environment of ingots, how to ensure product quality and maximize the recovery rate and cost of titanium scraps has always been a prominent problem.

Impurities such as mechanical oil, saponified liquid, dust, etc. mixed in the surface processing of titanium ingots and the collection of titanium chips, as well as tiny parts of equipment, if not thoroughly removed, will enter the molten pool together with titanium chips, which will have a great impact on the quality of the formed ingots . In my country's titanium ingot melting and casting industry, in the past, in order to ensure product quality, high-quality titanium shavings were generally extruded into blocks and cast into ingots after simple treatment, and then the formed ingots were melted and cast into ingots in the melting furnace again. In the secondary melting and casting, the impurity components are concentrated on the surface of the ingot, and the finished ingot with relatively high purity is finally obtained after removing the surface, so as to achieve the effect of purification. As for the scraps produced last time and the scraps of low quality in the previous period, they are generally sold at low prices to companies that do not have high requirements on ingredients to be used as raw materials for other industries, such as fireworks production. The above method of multiple melting and casting doubles the production cost, the utilization rate of titanium chips is low, and at the same time, the selling value of a large amount of inferior chips is extremely low, resulting in waste of materials and economic losses.

Invention content

In order to solve the problem of how to ensure product quality and maximize the recovery rate and cost of titanium scraps for remelting titanium scraps, the present invention provides a set of titanium scraps recovery and remelting process and a complete set of titanium scraps recycling and processing equipment.

In order to solve the above problems, the technical solution adopted by the present invention is: a titanium scrap recycling and remelting process, characterized in that the titanium scrap recycling and remelting process is: crushing→screening→cleaning→draining→drying→magnetic separation→packing→ Secondary drying → into the furnace.

The above-mentioned titanium scrap recovery and remelting process is characterized in that the steps of the titanium scrap recycling and remelting process are as follows: firstly, the spiral strip-shaped scrap material loaded into the sponge titanium bucket needs to be processed into scrap by a metal pulverizer, Afterwards, an ultrasonic cleaning machine is needed to clean and remove oil stains. After comparing various cleaning methods, it is determined that the ultrasonic cleaning method is the most practical method. Finally, the residual detergent, dust and stains are rinsed with clean water in the rinse tank, drained and loaded into the running trolley In the net cage, send it into the box dryer to heat and accelerate the water distribution to continue to remove the remaining water. After it is completely dry, transfer it to the magnetic separator, remove the iron impurities by the magnetic separator, and finally pack it in the metal baler. into blocks, put them into the electron beam melting furnace charge box and then put them into the furnace for melting and casting.

The above-mentioned recycling and remelting process of titanium shavings is characterized in that the cleaning method is preferably ultrasonic cleaning, the cleaning medium used is a common cleaning agent in the industry, the ultrasonic medium is ordinary water, and the price is low. The environmental pollution is relatively low. Utilizing the great penetrating ability of ultrasonic waves, as long as there are tiny gaps, ultrasonic water waves can be penetrated into it to impact the stains and make them fall off, and then discharged from the gaps, the cleaning effect is obvious.

The above-mentioned recycling and remelting process of titanium shavings is characterized in that the drying equipment adopts a box-type dryer, which is easy to use, has a large amount of one-time baking treatment, and has a uniform baking temperature. The baking temperature is controlled at 100 to 150°C, which is enough to meet the temperature requirements of water vapor evaporation, and the temperature is too high to easily cause weak oxidation.

A treatment device for implementing the above-mentioned titanium scrap recovery and remelting process, characterized in that the main equipment includes a metal pulverizer, an ultrasonic cleaner, a box dryer, a magnetic separator and a metal baler, plus some auxiliary facilities, Such as washing tank, running car.

The magnetic separator is specially designed and manufactured according to the process requirements and the characteristics of the magnetic separation material. It mainly consists of two electromagnetic separators, one of which is equipped with a magnetic roller with a high-strength permanent magnet with a magnetic field strength of more than 3000 gauss. It is made on a belt conveyor. The special feature of the belt conveyor is that the belt is bent once in the middle of the operation, and the material can be rolled once. Compared with ordinary magnetic separators, this magnetic separator has many magnetic separation devices, high magnetic separation strength, can be rolled in the middle to enhance the magnetic separation effect, magnetic separation is thorough, the equipment is compact in structure, and easy to operate.

The titanium shavings recovery and remelting process of the present invention provides a set of scientific, efficient and effective cleaning and processing preparations for the cleaning and processing preparations of the titanium metal melting and casting production enterprises for the shavings produced by the surface planing and milling of the rough ingot and the end face cutting of the titanium metal melting and casting production enterprise. Systematic, safe and reliable treatment process plan, most of the equipment involved are commonly used in the industrial field, so the equipment can generally meet the needs of use, and very few equipment or devices need to be customized. The sequence design in the process flow is reasonable and coherent, the equipment space layout is compact, and the operation is convenient. For the pollution generated many times in each link from the generation and loading of titanium scraps to the crushing and cleaning in the processing, including moisture, all of them are discharged before entering the furnace. Clean up and press into blocks with a baler to improve the density of raw materials and reduce the space occupied. The content of impurity components in the ingot cast from the titanium shavings processed by this process is significantly reduced, and the quality of the titanium ingot is relatively good, and the quality requirements can be met without multiple melting and casting, which greatly reduces the production cost. After more than a year of practice, it has been proved that this treatment process is of great significance for the recycling and remelting of a large number of scraps produced by titanium ingot melting and casting production enterprises, and the economic benefits produced are very obvious.

Description of drawings

The present invention will be described in further detail below in conjunction with specific examples.

Fig. 1 is a kind of titanium shavings recycling remelting process flow chart of the present invention;

Fig. 2 is a schematic diagram of a titanium shavings recycling and remelting process device. Among them: 1 spiral strip scrap, 2 metal pulverizer, 3 ultrasonic cleaning machine, 4 washing tank, 5 cage, 6 box dryer, 7 track, 8 magnetic separator, 9 metal baler, 10 for electronics Beam smelting furnace charge box.

Detailed ways

The titanium scrap recycling and remelting process of the present invention is: crushing→screening→cleaning→draining→drying→magnetic separation→packing→secondary drying→putting into the furnace.

The above-mentioned titanium scrap recovery and remelting process, the steps of the titanium scrap recycling and remelting process are: the spiral ribbon-shaped scrap material 1 loaded in the sponge titanium bucket first needs to be processed into scraps by a metal pulverizer 2, and then needs to be processed into scraps. Ultrasonic cleaning machine 3 cleans and removes oil stains. After comparing various cleaning methods, it is determined that ultrasonic cleaning is the most practical method. Finally, rinse the residual detergent, dust and stains with clean water in the washing tank 4, drain the water and load it into the running trolley In the net cage 5, send it into the box dryer 6 to continue to remove the remaining water by heating to accelerate the water distribution, and transfer it to the magnetic separator 8 after it is completely dried, and the iron impurities are removed by the magnetic separator, and finally in the metal Pack into blocks in the baler 9, put them in the electron beam melting furnace charge box 10 and then put them into the furnace for melting and casting.

In the above-mentioned recycling and remelting process of titanium shavings, the cleaning method is preferably ultrasonic cleaning, the cleaning medium used is a general-purpose cleaning agent in the industry, and the ultrasonic medium is ordinary water, which is low in price, and at the same time causes no environmental pollution due to discharge. relatively low. Utilizing the great penetrating ability of ultrasonic waves, as long as there are tiny gaps, ultrasonic water waves can be penetrated into it to impact the stains and make them fall off, and then discharged from the gaps, the cleaning effect is obvious.

In the above-mentioned titanium scrap recovery and remelting process, the drying equipment adopts a box-type dryer, which is easy to use, has a large amount of one-time baking, and has a uniform baking temperature. The baking temperature is controlled at 100 to 150°C, which is enough to meet the temperature requirements of water vapor evaporation, and the temperature is too high to easily cause weak oxidation.

A treatment device for implementing the above-mentioned titanium scrap recovery and remelting process, the main equipment includes a metal pulverizer 2, an ultrasonic cleaning machine 3, a box dryer 6, a magnetic separator 8, and a metal baler 9, plus some auxiliary facilities , such as washing tank 4, running car 5.

The magnetic separator used in the magnetic selection is a magnetic separator specially designed and manufactured according to the process requirements and the characteristics of the magnetic separation material. It mainly consists of two electromagnetic separators, one of which is equipped with high-strength permanent magnets with a magnetic field strength of more than 3000 gauss. The magnetic roller is made by being mounted on a belt conveyor. The special feature of the belt conveyor is that the belt is bent once in the middle of the operation process, and the material can be rolled once. Compared with ordinary magnetic separators, this magnetic separator has many magnetic separation devices, high magnetic separation strength, can be rolled in the middle to enhance the magnetic separation effect, magnetic separation is thorough, the equipment is compact in structure, and easy to operate.

Matters needing attention in use

The spiral scraps added to the metal pulverizer should be small and uniform, so as to avoid the danger of choking when there is too much accumulation in the silo. During ultrasonic cleaning, the scraps added to the gauze hopper should not be too much, otherwise the cleaning effect will be affected. The baking temperature in the box dryer should be strictly controlled, and the baking time depends on the drying effect. When feeding in the magnetic separator, the material should be kept evenly distributed and thin on the conveyor belt, and it is better to move slowly. Because the size of the crushed material is too small, it is loosely packaged into pieces, and the surface is easy to fall off. Properly increase the amount of material put in to improve the compactness.

The above is only a preferred specific embodiment of the present invention, and the scope of protection of the present invention is not limited thereto. Any person familiar with the technical field within the technical scope disclosed in the present invention can obviously obtain the simplicity of the technical solution. Changes or equivalent replacements all fall within the protection scope of the present invention.

Claims (1)

1. titanium bits reclaim a remelting processing, and operation comprises: pulverizing → screening → cleaning → draining → oven dry → magnetic separation → packing → secondary drying → enter stove founding,

It is characterized in that, pulverize, screening, carries out draining and dries, carry out magnetic separation and pack after oven dry, carry out secondary drying and reenter stove after packing after cleaning;

Processing step is: will install in titanium sponge bucket spiral shape bits material (1) digging Milling Machining and produce, first need to be processed into particle by metal pulverizer (2), Ultrasonic Cleaners (3) is needed to clean wipe oil after screening, the last washing composition will remained in flushed channel (4), dust and spot clear water are rinsed well, load in the net cage (5) in transportation trolley after draining away the water, send into the mode of being distributed by heating quickening moisture in chamber typed drying-machine (6) to continue to remove residual moisture, transfer on magnetic separator (8) after finish-drying, through magnetic separator removing iron contamination, finally in metal wrapping machine (9), be packaged into block, pile up in electron beam melting furnace hopper (10), send into after carrying out secondary drying in chamber typed drying-machine (6) and reenter stove founding,

The temperature of baking is 100 to 150 DEG C;

In described magnetic separation, magnetic separator used is the magnetic separator made according to processing requirement and magnetic separation material behavior specialized designs, primarily of two electric magnetic iron removers, the magnetic roller of magnetic force field intensity at the above high strength permanent magnet block of 3000 Gauss is equipped with in an inside, carry and be made to a rotary conveyor, the special place of rotary conveyor be belt in the middle part of operation process through first order buckling, can by material rolling once.