Magnesium-calcium composite slag forming agent and preparation method and application thereof
A composite slagging agent, magnesium-calcium technology, applied in the direction of manufacturing converters, improving process efficiency, etc., can solve the problems of non-adjustable CaO/MgO ratio, high temperature of calcined ore raw materials, and damage to ecological environment, etc., to achieve good slagging Effect, improvement of utilization route and utilization scale, effect of low calcination temperature
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Embodiment 1
[0055] Firstly, lime is made into milk of lime, and then saturated magnesium chloride solution or bischofite is added according to the molar ratio of calcium to magnesium at a ratio of 1.2:1. After 1 hour of reaction, magnesium hydroxide slurry is obtained, and then 0.1% polyacrylamide is added to the slurry. , centrifugally filtered, washed with tap water three times to obtain magnesium hydroxide, and magnesium hydroxide was calcined at 950° C. for 1 hour to obtain magnesium oxide (99%);
[0056] The second step is to prepare the magnesium-calcium composite slagging agent. The above prepared MgO and lime (CaO: 78%) are mixed in a ratio of 20%: 80% by mass, mixed and ground to 1mm with a vibrating grinder, and then pressed and molded under a pressure of 1Mpa to obtain a magnesium-calcium composite product. slag agent;
[0057] Step 3, steel slag making. Ingredients: 5.9g of slagging agent, containing 20% MgO, 80% lime, 120g of iron sample. Slagging: Put the iron sample in...
Embodiment 2
[0059] First, lime is made into milk of lime, then bischofite is added according to the molar ratio of calcium to magnesium of 1.2:1, and magnesium hydroxide slurry is obtained after 1 hour of reaction, and 0.1% polyacrylamide is added to the slurry, centrifugally filtered, and washed with tap water Magnesium hydroxide was obtained after three times, and magnesium hydroxide was calcined at 900° C. for 1 hour to obtain magnesium oxide (98%);
[0060] The second step is to prepare the magnesium-calcium composite slagging agent. The above prepared MgO and lime (CaO: 71%) are mixed in a ratio of 30%: 70% by mass, mixed and ground to 1mm with a vibrating grinder, and then pressed and formed under a pressure of 3Mpa to obtain a magnesium-calcium composite product. slag agent;
[0061] Step 3, steel slag making. Ingredients: 13.5g of slagging agent, containing 30% MgO, 70% lime, 120g of iron sample. Slagging: Place the iron sample in a quartz or graphite crucible for heating and m...
Embodiment 3
[0063] First, lime is made into milk of lime, then bischofite is added according to the molar ratio of calcium to magnesium of 1.2:1, and magnesium hydroxide slurry is obtained after 1 hour of reaction, and 0.1% polyacrylamide is added to the slurry, centrifugally filtered, and washed with tap water Magnesium hydroxide was obtained after three times, and magnesium hydroxide was calcined at 600° C. for 1 hour to obtain magnesium oxide (96%);
[0064] The second step is to prepare the magnesium-calcium composite slagging agent. The above prepared MgO and lime (CaO: 71%) are batched in a ratio of 22%: 78% by mass, mixed and ground to 1mm with a vibrating mill, and then pressed and formed under a pressure of 10Mpa to obtain a magnesium-calcium composite slagging agent;
[0065] Step 3, steel slag making. Ingredients: 6.5g of slagging agent: containing 30% MgO, 70% lime, 120g of iron sample; slagging: put the iron sample in a quartz or graphite crucible for heating and melting. ...
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