Sponge iron for furnace charge and its manufacturing method
A technology of sponge iron and charge, applied in furnaces, furnace types, fluidized bed furnaces, etc., can solve the problems of increasing the variety of steel, unable to exert the quality of sponge iron, and reducing the number of feeding times, reducing the amount of industrial waste, and reducing cost effect
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Embodiment 1
[0022] A kind of sponge iron for charge, its composition and weight content are as follows:
[0023] Concentrate powder 90% of total iron content 67%,
[0024] Additive 10%,
[0025] The composition and weight content of the additive are as follows:
[0026] Toner 80% with less than 2 parts per thousand sulfur,
[0027] Na 2 CO 3 10%,
[0028] NaCl 10%,
[0029] Mix the above three powders and serve:
[0030] The manufacturing method of sponge iron is as follows:
[0031] 1. Concentrate powder and additives are mixed and formed by pressing;
[0032] 2. The molded products are filled into a 50-meter tunnel kiln, and run at a speed of 2M / hour under the condition of 1250°C, and the kiln is ready.
Embodiment 2
[0034] A kind of sponge iron for charge, its composition and weight content are as follows:
[0035] 98% concentrate powder with 68.8% total iron content,
[0036] Additive 2%,
[0037] The composition and weight content of the additive are as follows:
[0038] Toner 90% with less than two thousandths of sulfur,
[0039] Na 2 CO 3 7%,
[0040] NaCl 3%,
[0041] Mix the above three powders and serve.
[0042] How to make sponge iron:
[0043] 1. The concentrate powder and additives are mixed and formed through hardness;
[0044] 2. The formed main product is filled into a 60-meter tunnel kiln, and run at a speed of 2.5 m / h under the condition of 1150 ° C, and it is ready when it comes out of the kiln.
Embodiment 3
[0046] A kind of sponge iron for charge, its composition and weight content are as follows:
[0047] 95% concentrate powder with 68% total iron content,
[0048] Additive 5%,
[0049] The composition and weight content of the additive are as follows:
[0050] Toner 70% with less than two thousandths of sulfur,
[0051] Na 2 CO 3 25%,
[0052] CaF 2 5%,
[0053] Mix the above three powders and serve.
[0054] How to make sponge iron:
[0055] 1. The concentrate powder and additives are mixed and formed by pressing.
[0056] 2. The molded products are filled into a 60-meter tunnel kiln, and run at a speed of 2 meters per hour under the condition of 1280 ° C, and the kiln is ready.
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