Aluminothermy self-propagating gradient reduction and slag-washing and refining-based method for preparing ferrotungsten
A self-propagating technology of ferrotungsten alloy, applied in the field of preparation of ferrotungsten alloy, can solve the problems of limited raw material source, low recovery rate of alloying elements, unsuitable for large-scale production, etc. stable effect
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Embodiment 1
[0027] A method for preparing tungsten-iron alloy based on thermite self-propagating gradient reduction and slag washing refining, comprising the following steps:
[0028] (1) Thermite self-propagating gradient reduction
[0029] According to WO 3 , Fe 2 o 3 The mass ratio of powder, aluminum powder, and slagging agent CaO is 1.0:0.28:0.33:0.07, and their particle sizes respectively satisfy: WO 3 Particle size≤2mm, Fe 2 o 3 Powder particle size ≤ 0.2mm, aluminum powder particle size ≤ 2mm, slagging agent particle size ≤ 0.2mm; the material is divided into 5 batches, and the amount of aluminum in each batch is 1.20, 1.05, 1.0, 0.90, 0.85 times, and the total aluminum content of raw materials is 0.98 times of the theoretical chemical dosage ratio of thermite self-propagating reaction, the weight of the first batch of materials accounts for 20% of the total material amount; put the first batch of materials into the reaction furnace, and Magnesium powder is ignited from the ...
Embodiment 2
[0035] A method for preparing tungsten-iron alloy based on thermite self-propagating gradient reduction and slag washing refining, comprising the following steps:
[0036] (1) Thermite self-propagating gradient reduction
[0037] According to WO 3 , Fe 2 o 3 The mass ratio of powder, aluminum powder, and slagging agent CaO is 1.0:0.29:0.34:0.15, and their particle sizes respectively satisfy: WO 3 Particle size≤2mm, Fe 2 o 3 Powder particle size ≤ 0.2mm, aluminum powder particle size ≤ 2mm, slagging agent particle size ≤ 0.2mm; the material is divided into 6 batches, and the amount of aluminum in each batch is 1.20, 1.1, 0.95, 1.20, 1.1, 0.95, 0.90, 0.85, 0.80 times, and the total aluminum content of raw materials is 0.97 times of the theoretical chemical dosage ratio of thermite self-propagating reaction, and the weight of the first batch of materials accounts for 28.6% of the total amount of materials; put the first batch of materials into the reaction furnace , use magne...
Embodiment 3
[0043] A method for preparing tungsten-iron alloy based on thermite self-propagating gradient reduction and slag washing refining, comprising the following steps:
[0044] (1) Thermite self-propagating gradient reduction
[0045] According to WO 3 , Fe 2 o 3 The mass ratio of powder, aluminum powder, and slagging agent CaO is 1.0:0.32:0.34:0.35, and their particle sizes respectively satisfy: WO 3 Particle size≤2mm, Fe 2 o 3 Powder particle size ≤ 0.2mm, aluminum powder particle size ≤ 2mm, slagging agent particle size ≤ 0.2mm; the material is divided into 7 batches, and the amount of aluminum in each batch is 1.20, 1.1, 1.0, 0.95, 0.925, 0.90, 0.85 times, and the total aluminum content of raw materials is 0.95 times of the theoretical chemical dosage ratio of thermite self-propagating reaction, and the weight of the first batch of materials accounts for 22.2% of the total amount of materials; put the first batch of materials into the reaction In the furnace, magnesium po...
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