Sintering method of high-titanium vanadium-titanium magnetite concentrates

Abstract

The invention belongs to the field of iron ore sintering, and particularly relates to a sintering method of high-titanium vanadium-titanium magnetite concentrates. According to the problem that the sintering performance of the high-titanium vanadium-titanium magnetite concentrates is poor in the prior art, the sintering method of the high-titanium vanadium-titanium magnetite concentrates is provided and comprises the following steps that a, the high-titanium vanadium-titanium magnetite concentrates, a sintering aid, return ore and potassium permanganate are mixed evenly to obtain a mixture; and b, the mixture in the step a is sintered, and when the temperature of sintering waste gas reaches the maximum value and starts to drop, sintering is finished. When the high-titanium vanadium-titanium magnetite concentrates are sintered, a potassium permanganate solution is added, and the sintering utilization factor, the sintered ore drum index and the sintering yield are increased. The method is easy to operate, the improvement effect of the sintering performance is remarkable, potassium permanganate raw materials are easy to obtain and low in price, and a brand-new manner is provided for improving the sintering performance of the high-titanium vanadium-titanium magnetite concentrates.

Description

technical field

[0001] The invention belongs to the field of iron ore sintering, and in particular relates to a sintering method of high-titanium vanadium-titanium magnetite concentrate. Background technique

[0002] High Titanium Vanadium Titanium Magnetite Concentrate, TiO 2 The content is high, and more brittle perovskites (CaO·TiO 2 ), the silicate binder phase content is small, resulting in poorer indicators such as the yield, utilization factor, and drum index of sintered ore than ordinary ore.

[0003] The present invention improves the technical and economic indicators of sintering by adding potassium permanganate aqueous solution in the sintering process, and releases oxygen, manganese dioxide and potassium manganate through the decomposition reaction of potassium permanganate in the sintering process, and manganese dioxide is beneficial to improve Sintering utilization coefficient, oxygen is beneficial to increase the oxygen potential in the sintering process, wh...

Examples

Embodiment 1

[0038] Embodiment 1 is that 70kg of sintering fresh material adds its weight 0.5wt% potassium permanganate aqueous solution, adds its weight 30wt% back to ore and carries out sintering; Embodiment 2 is sintering new material 70kg and its weight 1wt% permanganate Potassium aqueous solution, add the return ore of its weight 30wt% again and carry out sintering; Embodiment 3 adds the potassium permanganate aqueous solution of its weight 2wt% for sintering new material 70kg, adds the return ore of its weight 30wt% again and carries out sintering; Comparative example is Add 70kg of sintered fresh material plus its weight of 30wt% return ore for sintering.

[0039] Mix the raw materials in the examples and comparative examples, the first mixing time is 8 minutes, the second mixing time is 4 minutes, and the moisture content of the sintered material after control mixing is: Example 1 7.4%, Example 2 7.5%, Example 3 7.5% , 7.4% for the comparative example; see Table 1 below for the com...

technical field

[0001] The invention belongs to the field of iron ore sintering, and in particular relates to a sintering method of high-titanium vanadium-titanium magnetite concentrate. Background technique

[0002] High Titanium Vanadium Titanium Magnetite Concentrate, TiO 2 The content is high, and more brittle perovskites (CaO·TiO 2 ), the silicate binder phase content is small, resulting in poorer indicators such as the yield, utilization factor, and drum index of sintered ore than ordinary ore.

[0003] The present invention improves the technical and economic indicators of sintering by adding potassium permanganate aqueous solution in the sintering process, and releases oxygen, manganese dioxide and potassium manganate through the decomposition reaction of potassium permanganate in the sintering process, and manganese dioxide is beneficial to improve Sintering utilization coefficient, oxygen is beneficial to increase the oxygen potential in the sintering process, wh...

Examples

Embodiment 1

[0038] Embodiment 1 is that 70kg of sintering fresh material adds its weight 0.5wt% potassium permanganate aqueous solution, adds its weight 30wt% back to ore and carries out sintering; Embodiment 2 is sintering new material 70kg and its weight 1wt% permanganate Potassium aqueous solution, add the return ore of its weight 30wt% again and carry out sintering; Embodiment 3 adds the potassium permanganate aqueous solution of its weight 2wt% for sintering new material 70kg, adds the return ore of its weight 30wt% again and carries out sintering; Comparative example is Add 70kg of sintered fresh material plus its weight of 30wt% return ore for sintering.

[0039] Mix the raw materials in the examples and comparative examples, the first mixing time is 8 minutes, the second mixing time is 4 minutes, and the moisture content of the sintered material after control mixing is: Example 1 7.4%, Example 2 7.5%, Example 3 7.5% , 7.4% for the comparative example; see Table 1 below for the com...

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