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Method for synchronously separating potassium, lead and iron in sintering machine head ash

A technology of synchronous separation and head ash, applied in the chemical industry, can solve the problems of irritating odor of sodium sulfide, long flotation process, complex process, etc., to reduce leaching and filtration processes, increase product value, and good separation effect Effect

Active Publication Date: 2021-07-09
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is complicated, the process is long, and the treatment of lead-containing tailings is still in the research stage
[0006] There is also an existing technology that grinds the head ash ball to strengthen wetting and promote dispersion, thereby increasing the leaching rate of potassium chloride and obtaining a leaching slag containing 49.93% iron and 12.47% lead, but the flotation process of this process is relatively long. The flotation reagents used, such as sodium sulfide, have a pungent smell, and the utilization of potassium is not considered

Method used

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  • Method for synchronously separating potassium, lead and iron in sintering machine head ash

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Experimental program
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Effect test

Embodiment 1

[0047] Synchronously separate potassium, lead and iron in the sintering head ash with the following method steps:

[0048] a. Prepare pulp: mix the sintering head ash (kg) and water (L) in Table 1 according to the solid-to-liquid ratio of 1:6 to prepare pulp;

[0049] b. Slurry re-election: use a pump to transport it to the FX150 cyclone for single-stage cyclone classification. The feeding pressure of the slurry is 0.16MPa, and the diameter of the grit nozzle of the cyclone is 22mm to obtain lead-containing material Ore slurry and iron-containing slurry;

[0050] c. Separating iron and lead: filtering the obtained lead-containing material ore slurry and iron-containing material ore slurry respectively in step b to obtain lead-containing material and filtrate thereof, iron-containing material and filtrate thereof;

[0051] d. Separation of potassium: mix the filtrate obtained after filtering in step c, return to step a instead of water for pulping, and cycle through pulping-gr...

Embodiment 2

[0054] Synchronously separate potassium, lead and iron in the sintering head ash with the following method steps:

[0055] a. Prepare pulp: mix the sintering head ash (kg) and water (L) in Table 1 according to the solid-to-liquid ratio of 1:8 to prepare pulp;

[0056] b. Slurry re-election: transport it to the FX100 cyclone with a pump for primary cyclone classification, the feeding pressure of the slurry is 0.11MPa, the diameter of the grit nozzle of the cyclone is 14mm, and the gravity separation slurry is obtained , layered to obtain the primary gravity separation light phase slurry and the primary gravity separation heavy phase slurry; the primary gravity separation heavy phase slurry and water are adjusted to a solid-liquid ratio of 1:15 to make a slurry, which is transported to the The secondary cyclone classification is carried out in the FX175 cyclone, the feeding pressure of the slurry conveying is 0.15~0.18MPa, the diameter of the grit nozzle of the cyclone is 32mm, ...

Embodiment 3

[0061] Synchronously separate potassium, lead and iron in the sintering head ash with the following method steps:

[0062] a. Preparation of pulp: mix the sintering head ash (kg) and water (L) in Table 1 according to the solid-to-liquid ratio of 1:3, and prepare the pulp;

[0063] b. Slurry re-election: use a pump to transport it to the FX175 cyclone for single-stage cyclone classification. The feeding pressure of the slurry is 0.2MPa, and the diameter of the grit nozzle of the cyclone is 18mm. Select the light phase slurry and the first-stage gravity-selected heavy-phase slurry; the first-stage gravity-selected heavy-phase slurry is swirled and classified again under the same conditions as above to obtain the second-stage gravity-selected light-phase slurry and the second-stage gravity-selected heavy phase slurry;

[0064] c. Separation of iron and lead: mix the first-level gravity separation light-phase slurry obtained in step b with the second-level gravity separation ligh...

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Abstract

The invention belongs to the technical field of chemical engineering, and particularly relates to a method for synchronously separating potassium, lead and iron in sintering machine head ash. In order to solve the problem that a method for effectively and synchronously separating potassium, lead and iron in the sintering machine head ash does not exist at present, the invention provides the method for synchronously and efficiently separating potassium, lead and iron in the sintering machine head ash, which mainly comprises the following steps: a, blending the sintering machine head ash into ore pulp; B, performing gravity separation on the ore pulp; C, filtering and separating iron-containing ore pulp and lead-containing ore pulp; and d, circulating the filtrate for multiple times to obtain a potassium-containing solution. The method has the characteristics of simple process, short flow, greenness, high efficiency and good separation effect. In the gravity separation process, the leaching rate of potassium exceeds 95%, the PbO content of a lead-containing material exceeds 35%, the TFe content of an iron-containing material exceeds 49%, the recovery rate of lead obtained through the method exceeds 95%, the recovery rate of iron exceeds 85%, the product value is greatly improved, and efficient resource utilization of the sintering machine head ash is achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for synchronously separating potassium, lead and iron in sintering head ash. Background technique [0002] Sintering machine head ash is one of the fumes produced during the sintering process. It enters the dust removal system along with the sintering flue gas, and is then collected by the electrostatic precipitator. Because most of the ore used in sintering production contains potassium, sodium, lead, chlorine and other elements, it is very easy to volatilize in the high temperature process of sintering to form flue gas such as chloride, and then cool to very fine dust, which is collected by the electrostatic precipitator, thus obtaining sintered Machine head ash, which mainly contains potassium chloride, iron oxide, lead hydroxychloride, lead oxide, sodium chloride and common gangue minerals, and also contains a small amount of rare metals such as...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B26/10C22B13/00
CPCC22B7/02C22B7/006C22B26/10C22B13/045Y02P10/20
Inventor 曾冠武郝建璋杨珍张溅波任艳丽
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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