Method for preparing cold-pressed ball for iron-making blast furnace and improving waste utilization rate
A technology of cold-pressed balls for iron-making blast furnaces, which is applied in the field of preparation of cold-pressed balls for iron-making blast furnaces. It can solve the problems of destroying the life of the furnace lining, affecting the smooth running of the blast furnace, and low resource utilization, so as to improve the ball forming rate and realize Efficient circular economy benefits, the effect of reducing energy consumption
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[0020] The present invention proposes a method for preparing cold-pressed balls for ironmaking blast furnaces and improving the utilization rate of solid waste resources. The preparation method of cold-pressed balls comprises the following steps:
[0021] Step S1: Add steelmaking dust removal dust, converter mud fine particles, and waste steelmaking suspension sludge respectively into the intensive mixer, stir evenly and return to the stockyard to form a basic mixture, specifically, steelmaking dust removal dust, converter mud fine particles and The waste steelmaking suspended mud is added to the intensive mixer according to the following weight percentages, wherein the weight percentage of the steelmaking dust removal ash is 15% to 20%, the weight percentage of the converter mud fine particles is 40% to 45%, and the weight percentage of the waste steelmaking suspended mud is The weight percentage is 15% to 20%;
[0022] Step S2: Transfer the basic mixture of step S1 to the ra...
Embodiment 1
[0033] 1. Add 40% by weight of converter mud fine particles, 16% by weight of waste steelmaking suspension sludge, and 20% by weight of steelmaking dust removal ash into a strong mixer, stir for 10 minutes, and form a foundation after stirring evenly Mixture; the basic mixture is transferred to the raw material field for a digestion, and left to stand for 24 hours, so that various materials are fused together;
[0034] 2. When the mixture that has been digested once passes through the belt and the ash tank with a weighing device, add ironmaking gas ash with a weight percentage of 20% into the twin-shaft mixer for re-mixing, and transfer it to the digestion bin after 15 minutes. Second static digestion for more than 24 hours;
[0035] 3. Add 4% binder by weight to the digested basic mixture, stir twice for a total of 15 minutes, and form the total mixture after stirring evenly;
[0036] 4. Put the total material mixture into a ball briquetting machine, press it into a metal ba...
Embodiment 2
[0040] 1. Add 42% by weight of converter mud fine particles, 18% by weight of waste steelmaking suspension sludge, and 15% by weight of steelmaking dust ash into a strong mixer, stir for 15 minutes, and form a foundation after stirring evenly Mixture; the basic mixture is transferred to the raw material field for a digestion, and left to stand for 24 hours, so that various materials are fused together;
[0041] 2. When the mixture that has been digested once passes through the belt and the ash tank with a weighing device, add the ironmaking gas ash with a weight percentage of 22% into the twin-shaft mixer, mix it again for 15 minutes, and then transfer it to the digestion bin. Stand still and digest for more than 24 hours.
[0042] 3. Add 3% binder by weight to the basic mixture after digestion, stir twice for a total of 15 minutes, and form a total material mixture after stirring evenly;
[0043] 4. Put the total material mixture into the ball press machine, press it into me...
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