A method of directly using slag iron to produce iron castings
A technology of iron castings and water slag, which is applied in the field of directly using water slag ironmaking to produce iron castings, which can solve the problems of high production costs and achieve the effects of low cost, power saving, and energy saving
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Embodiment 1
[0032] Example 1, slag iron is used to manufacture iron castings, which can melt slag iron particles that are difficult to tolerate in the smelting process (form refractory massive slag iron nuggets during the smelting process of slag iron) into molten iron, thereby directly Castings are poured from molten iron. The method of the invention adopts slag iron instead of gray iron raw material to smelt and manufacture qualified molten iron pouring castings, which meets the requirements of low-carbon and circular economy. The method is specifically carried out in the following steps:
[0033] Step 1. The water slag iron particles are to send the waste water slag iron nuggets purchased from the steelmaking plant to the cement plant for crushing with the HXLM5000 (crusher model) raw material vertical mill powder separator, and crush the water slag iron nuggets to 1~ 3mm particles, the crushed particles are magnetically separated on a large dry magnetic separator 8240 (the model of t...
Embodiment 2
[0046] Example 2, HT150 is a medium-strength iron casting with good casting performance, simple process, small casting stress, and no need for artificial aging; it has certain mechanical strength and good shock absorption. It is suitable for the manufacture of parts under medium stress and parts working in weak corrosion environment. Such as cover, bearing seat, valve body, hand wheel, etc.
[0047] Use slag iron to directly produce HT150 castings—small bearing housings. The production process is as follows: (1) Take 10% of the standard gray iron raw materials used in the production of normal gray iron castings according to the mass fraction ratio and place them on the bottom of the intermediate frequency furnace. The furnace is preheated (the current of the intermediate frequency furnace is 500A~600A, the power is 200kw~300kw, and the time is 10 minutes to 15 minutes), and then the power of the intermediate frequency furnace is increased to full load, so that the temperature ...
Embodiment 3
[0048] Example 3, HT200 is suitable for parts that bear relatively large stress, have high unit pressure between friction surfaces, and require certain airtightness or corrosion resistance. Such as the more important castings in general machinery manufacturing (such as cylinders, gears, machine bases, machine bed and columns); cylinder blocks, cylinder heads, pistons, brake wheels, coupling discs, etc. of automobiles and tractors, with inspection of measuring planes Workpieces (such as scribing plates, shaped irons, flat rulers, level frames, etc.); hydraulic cylinders, pump bodies, valve bodies, and pulleys with peripheral speeds that withstand pressures less than that require certain corrosion resistance and high strength chemical containers , pump casing, tower, etc.
[0049] Use slag iron to directly produce HT200 castings - large bearing housings. The production process is as follows: (1) Take 10% of the standard gray iron raw materials used in the production of normal gr...
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