Cast iron anode mold capable of improving copper pouring amount and production method thereof

Technical Field

This invention relates to metallurgical industrial production processing mould, in particular a cast iron anode pouring copper quantity and its production method.

Background Art

Anode anode copper is for casting mould, the work environment is very bad, when subjected to frequent heat shock work, to be subjected to hot the 1200 [...] more copper water for flushing, to accept body 10 the following [...] the temperature of the cold water, is subjected to great temperature fluctuations, in the course of the thermal cycle, has been hampered due to the shrinkage and expansion, to make it produce the internal stress, in particular are heterogeneous thickness, if the the flat on the top of the anode, thick in the middle, two-side thin (see Figure 1), the internal stress is large, the working surface of this kind of stress lead to cracks or surface net-shaped crack, they are connected with each other and brought up, with the passage of time will ultimately lead to cracking of the anode being discarded in production and use. The prior cast iron anode HT200 or HT150 material, an average of only pouring copper quantity 150t/block, frequent loading and unloading anode causing the operating personnel, increasing the labor intensity and the production cost. In order to improve the service life of the cast iron anode, by increasing attempts to realize the number of cast iron, but have failed.

Content of the invention

The aim of the invention is to solve the existing cast iron anode improper material, the design is not reasonable structure, large internal stress in the production, and easy generation of cracks, lead to explosion scrapped, the service life is short, the problems of little pouring copper quantity , provides a cast iron anode pouring copper quantity and its production method.

Specific programmes of this invention is:a cast iron anode pouring copper quantity , with die body, the die body opens has the pouring copper die space , and is located in the mould cavity pouring copper the top surface of the upper part is provided with two pin-hole, is characterized in that: the chemical composition of the die by weight percent is:C: 3.6-3.8, Si: 1.5-1.8, Mn: 0.4-0.6, P <0.1, S <0.1, the rest is Fe; the middle section of the top of the die is provided with two the groove of the left and right symmetrically, constitution mountain -shaped structure of the surrounding edge.

pouring copper quantity producing a method for producing cast iron anode is: using 90% + 10% of the anode the mold returns to charge new Pig iron, into the cupola smelting, the utility model discloses clay sand molding, molten iron at the tapping temperature the 1340 [...] -1380 the casting between [...] , heat insulating sand mould 36-40 hours ejection molding, and the molding sand.

The invention breaks through the traditional concepts, reverse thinking, selection of a relatively low grade of cast iron making anode, an unexpected effect is achieved. This is because of the requirement to application environment according to the anode must have a relatively high heat conducting capacity and thermal fatigue resistance, at the same time has a certain strength, heat conduction ability should be superior to the strength. Coarse graphite base body tissue, heat conducting ability is good, but the intensity is low, pearlite content is high, good strength, but poor thermal fatigue resistance. Because the ferrite thermal fatigue performance superior to the pearlitic, therefore, the invention establishes that anode volume percentage of pearlite content is smaller than bead 40, graphite length 4.5-9, selection of the "high-carbon, silicon, manganese" chemical ingredient, i.e., of the: C: 3.6-3.8, Si: 1.5-1.8, Mn: 0.4-0.6, P <0.1, S <0.1. To avoid this invention to match containing Cr, Mo, V, Ti the mixing of the strong carbide element material, in order to form the carbides reduce the content of ferrite, the heat conducting performance, reduce the probability of explosion.

The anode in the present invention is provided with double grooves mold crown , die need not only guarantee the middle boss, can at the same time the thickness of the wall of the mould to be uniform, reducing the wall thickness is non-uniform internal stress generated by different cooling speed, slowing down the probability of explosion in advance, to extend the service life of the anode.

The anode of this invention at the same time on the production method for the optimized design, the 90% + 10% of the anode the mold returns charge of the new Pig iron for reaction of, and control the temperature of the molten iron is 1340 the the [...] -1380 [...] (traditional generally less than the 1280 [...]) for pouring, relatively high temperature is conducive to desalination charge of the molten iron bad hereditas, pearlite contain promoting purification of molten iron is formed in the non-ferrous element, at the same time extension in the sand mould of molten iron in a liquid time, slow down the cooling speed of the molten iron, the more fully graphitized anode, improve its thermal conductivity. Selected in the method of the present invention discloses a clay sand molding, the mold cavity in molten iron is advantageous to prolong the time is in a liquid, further slowing down the cooling speed of the molten iron, the more fully graphitized anode, improve its heat conduction ability, and by extending the holding time in the sand mould, which is beneficial to reducing the anode temperature difference of the room temperature after demoulding, reduce stress generated.

Experiments show that the anode of the present invention, average pouring copper quantity can reach 200t/blocks of the above, the service life is greatly improved, and the cost is reduced, and operating personnel one quarter of the amount of labor of the anode can be reduced, the cost expenditure anode 30%. The implementation of the present invention will bring tremendous commercial success, has obvious economic and social benefits.

Description of drawings

Figure 1 is an elevational view of the prior cast iron anode;

Figure 2 is an elevational view of a cast iron anode of the present invention;

Figure 3 is A-A view of Figure 2;

Figure 4 is B-B   view of Figure 2;

Figure 5 is C-C view of Figure 2;

Figure 6 is D-D view of Figure 2.

In the Figure: 1 the die [...] , 2- pouring copper die space , 3-demoulding top pinhole, 4-the mountain shape surrounding edge structure, 5-groove.

Mode of execution

Example 1: see Figure 2-6, a cast iron anode pouring copper quantity , it has a die body 1, the die body 1 on cavity opens has the pouring copper 2, and the die body 1 located on the cavity pouring copper 2 upper part is provided with two release thimble goes 3, which is characterized in that: the die 1 chemical composition in weight percentage: C: 3.6, Si: 1.6, Mn: 0.4, P <0.1, S <0.1, the rest is Fe; the die 1 is provided with the middle section of the top of the two left and right symmetrical arrangement of the groove 5, the structure of the surrounding edge constitution mountain -shaped 4.

Production example 1 improving pouring copper quantity method for producing cast iron anode is: using 90% + 10% the mold returns charge the anode of the new Pig iron, into the cupola smelting, the utility model discloses clay sand molding, molten iron at the tapping temperature 1340 the casting [...] , in a sand mold 36 hours demoulding forming, grinding the finished product by the sand.

Example 2: the embodiment of the physical structure of the cast iron anode with example 1, its chemical composition weight percent is:C: 3.7, Si: 1.5, Mn: 0.5, P <0.1, S <0.1, the rest is Fe; the embodiment of method of production of the cast iron anode is basically the same with the embodiment 1, but the tapping temperature of molten iron the 1360 [...] , sand mould for heat preservation time 38 hours.

Example 3: the embodiment of the physical structure of the cast iron anode with example 1, its chemical composition weight percent is:C: 3.8, Si: 1.8, Mn: 0.6, P <0.1, S <0.1, the rest is Fe; the embodiment of method of production of the cast iron anode is basically the same with the embodiment 1, but the tapping temperature of molten iron the 1380 [...] , sand mould for heat preservation time of 40 hours.