Inorganic daub for gas-phase region of oxygen pressure leaching kettle in zinc smelting plant

Abstract

The invention discloses a zinc smelting plant oxygen pressure leaching kettle gas phase region inorganic daub, and relates to the technical field of zinc smelting, the inorganic daub is prepared by mixing a component A and a component B, the component A is potash water glass, and the component B is prepared from the following raw materials: sodium fluosilicate, aluminum triphosphate, yellow lead powder and quartz sand. The heavy metal oxides aluminum triphosphate and yellow lead powder are added and have high proportions in the curing agent, so that a space system of the heavy metal oxides is formed in a curing system, and the corrosion resistance is enhanced; in addition, the inorganic filler is optimized, and the high-quality inorganic particle filler is added, so that the structural strength of a cured product is improved, and the scouring resistance is improved; the used raw materials are economical in price and easy to produce; and the construction process is more convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of zinc smelting, and in particular relates to an inorganic sludge in a gas phase zone of an oxygen pressure leaching kettle in a zinc smelter. Background Art

[0002] In the current mainstream domestic oxygen pressure leaching fully wet zinc smelting process, the high temperature, high pressure, and highly corrosive environment within the oxygen pressure leaching autoclave during the core leaching process places high demands on the corrosion resistance of lining materials such as acid-resistant and heat-resistant bricks and masonry mortar, especially the lining mortar. During the use of the autoclave, the innermost mortar layer in the vapor phase zone of the autoclave, which comes into contact with the medium, is susceptible to corrosion. Therefore, an improved mortar specifically designed for the brick joints in the vapor phase zone is needed.

[0003] In existing zinc smelters, the original organic masonry mortar is still used to fill and apply brick joints. In the liquid phase, the composition of the medium is fixed, and the original mortar can effectively prevent its corrosion. However, in the gas phase, the composition of the acidic gas medium is relatively complex. In addition, the erosion of the leachate and the alternation of temperature make the original mortar unable to cope with the corrosion in the gas phase in the kettle. After a short period of use, it will corrode and fall off. If it is not treated, the leachate will penetrate into the brick plate through the brick joints and cause corrosion to the kettle body after reaching it, with serious consequences.

[0004] After investigation, it was found that the German AspitHB inorganic mortar is suitable for brick lining of containers, equipment and chimneys, and has good erosion resistance and corrosion resistance. The organic anti-corrosion mortar currently circulating on the market has acceptable corrosion resistance in the oxygen-free environment of the liquid phase. However, because the expansion coefficient is quite different from that of inorganic acid-resistant and heat-resistant bricks, and the working conditions in the gas phase zone are not only acidic, but also subject to erosion, acid gas corrosion, aerobic and anaerobic interaction, and temperature changes, the organic mortar in the gas phase zone is easy to fall off during normal production, and production must be stopped for maintenance after 3 months of use, affecting normal production. Therefore, it is necessary to develop a mortar for the gas phase zone that has good corrosion resistance under the conditions of acid gas corrosion, leachate erosion, temperature changes, and aerobic and anaerobic interaction, and is also suitable for acid-resistant and heat-resistant bricks with a large expansion coefficient.

[0005] The brick-lined pressure kettles currently used in the zinc smelting field have highly corrosive internal media. The main ones currently used in China are liquid phase mortar and diaphragm mortar, both of which are organic mortars. There is no mortar specifically for the gas phase zone. The inorganic mortar for the gas phase zone of the oxygen pressure leaching kettle in the zinc smelter is specially developed for the gas phase zone in the kettle, which effectively solves the corrosion and erosion of the innermost brick lining in the kettle. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to address the lack of existing domestic inorganic mortar in the gas phase zone and the poor corrosion resistance and erosion resistance of other mortars.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] An inorganic slurry for the gas phase zone of an oxygen pressure leaching reactor in a zinc smelter is prepared by mixing component A and component B, wherein the mixing ratio of component A to component B is component A:component B=1:1.5-2.5 by weight;

[0009] The component A is water glass;

[0010] Calculated by mass percentage, the component B is prepared from the following raw materials: 7.5% sodium fluorosilicate, 5% aluminum tripolyphosphate, 2.5% yellow lead powder, and 85% quartz sand.

[0011] Preferably, the quartz sand is calculated by mass percentage as follows: 20% 200-mesh quartz sand, 40% 100-mesh quartz sand, and 20% 50-mesh quartz sand.

[0012] Preferably, the mixing ratio of component A and component B is component A: component B = 1:1.5 by weight.

[0013] Preferably, the mixing ratio of component A and component B is component A:component B=1:2 by weight.

[0014] Preferably, the mixing ratio of component A and component B is component A:component B=1:2.5 by weight.

[0015] The beneficial effects of the present invention are as follows: by adding heavy metal oxides aluminum tripolyphosphate and yellow lead powder, and having a relatively high proportion in the curing agent, a space system of heavy metal oxides is formed in the curing system, thereby enhancing corrosion resistance; in addition, the inorganic filler is optimized, and high-quality inorganic particle fillers are added (the ratio of quartz sand with different particle sizes is improved), the purpose of which is to increase the structural strength of the cured product and improve the erosion resistance; the raw materials used are economical and easy to produce; and the construction process is made more convenient. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to specific embodiments. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention but are not intended to limit the present invention.

[0017] Example 1

[0018] The inorganic mortar for the gas phase zone of the oxygen pressure leaching reactor of a zinc smelter of the present invention is prepared by mixing component A and component B, wherein the mixing ratio of component A to component B is component A: component B = 1:1.5-2.5 by weight;

[0019] The component A is water glass;

[0020] Calculated by mass percentage, the component B is prepared from the following raw materials: 7.5% sodium fluorosilicate, 5% aluminum tripolyphosphate, 2.5% yellow lead powder, and 85% quartz sand.

[0021] The quartz sand comprises 20% of 200-mesh quartz sand, 40% of 100-mesh quartz sand, and 20% of 50-mesh quartz sand in terms of mass percentage.

[0022] The mixing ratio of the component A and the component B is component A: component B = 1:1.5 by weight.

[0023] The mixing ratio of the component A and the component B is component A: component B = 1:2 by weight.

[0024] The mixing ratio of the component A and the component B is component A: component B = 1:2.5 by weight.

[0025] After fully mixing component A and component B, inorganic clay for the gas phase zone of the oxygen pressure leaching reactor of the zinc smelter is obtained. The properties of the improved inorganic clay are shown in the following table:

[0026] Partial properties of inorganic clay in the gas phase zone of oxygen pressure leaching reactor in zinc smelter

[0027]

[0028] The present invention adds heavy metal oxides aluminum tripolyphosphate and yellow lead powder, and has a relatively high proportion in the curing agent, so that a space system of heavy metal oxides is formed in the curing system, thereby enhancing corrosion resistance. In addition, by optimizing the inorganic filler, high-quality inorganic particle filler is added (the ratio of quartz sand with the same particle size is improved), the purpose is to increase the structural strength of the cured product and improve the erosion resistance. The raw materials used are economical and easy to produce; the production steps are simple, making the construction process more convenient.

[0029] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only intended to help understand the principles of the embodiments of the present invention.

Claims

1. An inorganic slurry for the gas phase zone of an oxygen pressure leaching reactor in a zinc smelter, characterized by: The inorganic cement is prepared by mixing component A and component B, wherein the mixing ratio of component A to component B is component A: component B = 1:1.5-2.5 by weight; The component A is potassium water glass; Calculated by mass percentage, the component B is prepared from the following raw materials: 7.3%-7.7% sodium fluorosilicate, 4%-6% aluminum tripolyphosphate, 2%-3% yellow lead powder, and 80%-90% quartz sand.

2. The inorganic slurry for the gas phase zone of the oxygen pressure leaching reactor of a zinc smelter according to claim 1, characterized in that: The quartz sand comprises 18-22% by mass of 200-mesh quartz sand, 38-42% by mass of 100-mesh quartz sand, and 18-22% by mass of 50-mesh quartz sand.

3. The inorganic slurry for the gas phase zone of the oxygen pressure leaching reactor of a zinc smelter according to claim 1, characterized in that: The mixing ratio of the component A and the component B is component A: component B = 1:1.5 by weight.

4. The inorganic slurry for the gas phase zone of the oxygen pressure leaching reactor of a zinc smelter according to claim 1, characterized in that: The mixing ratio of the component A and the component B is component A: component B = 1:2 by weight.

5. The inorganic slurry for the gas phase zone of the oxygen pressure leaching reactor of a zinc smelter according to claim 1, characterized in that: The mixing ratio of the component A and the component B is component A: component B = 1:2.5 by weight.

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