阅读说明：本技术 一种红丹制备工艺 (Red lead preparation technology ) 是由 宋慧林 刘春红 于 2020-06-29 设计创作，主要内容包括：本发明提供了一种红丹制备工艺,包括以下步骤：1)人工将电解铅放置传送带上进入熔铅炉中熔化,熔化炉加热至400-440℃,电解铅被熔融成液态；2)液态铅经密闭管道流入后续的制粉炉；3)初步氧化后的铅粉通过二级旋风分离器和布袋除尘器管道由混合绞笼输送到造粒机进行造粒和筛选,造粒直径为φ0.8-1.7mm；4)筛选合格的颗粒通过氧化炉进行加热氧化；5)氧化完成的红丹进行冷却；6)检测不合格的产品和包装洒落的产品均进入到氧化炉进行重新氧化。本发明提供的一种红丹制备工艺,整个过程中都会除尘回收,能够回收废料,节约资源,还能够防止污染环境,提高氧气浓度,能够增加产品的氧化产量。(The invention provides a red lead preparation process, which comprises the following steps: 1) manually placing the electrolytic lead on a conveying belt to enter a lead melting furnace for melting, heating the melting furnace to 400-440 ℃, and melting the electrolytic lead into a liquid state; 2) the liquid lead flows into a subsequent powder making furnace through a closed pipeline; 3) conveying the lead powder after primary oxidation to a granulator for granulation and screening through a secondary cyclone separator and a bag-type dust collector pipeline by a mixing and stranding cage, wherein the diameter of granulation is phi 0.8-1.7 mm; 4) heating and oxidizing the screened qualified particles through an oxidation furnace; 5) cooling the oxidized red lead; 6) and (4) detecting that the products which are unqualified and the products which are scattered in the package enter an oxidation furnace for reoxidation. According to the red lead preparation process provided by the invention, dust is removed and recovered in the whole process, waste materials can be recovered, resources are saved, the environment pollution can be prevented, the oxygen concentration is improved, and the oxidation yield of products can be increased.)

1. The red lead preparation process is characterized by comprising the following steps of:

1) manually placing the electrolytic lead on a conveying belt to enter a lead melting furnace for melting, heating the melting furnace to 400-440 ℃, and melting the electrolytic lead into a liquid state;

2) liquid lead flows into a subsequent powder making furnace through a closed pipeline, air is introduced into the powder making furnace at the speed of 6-10L/min, the lead melting process is totally closed, lead-free smoke dust is generated, all materials are completely transferred, lead-free slag is generated, lead liquid is centrifugally stirred and rotated at high speed in the powder making furnace, the temperature is controlled to be 450-grade and 480 ℃, under the environment of negative pressure, outside air is sucked into the furnace, an impeller rotates to enable the lead liquid and the air to be fully contacted to generate fine lead powder with required oxidation degree, and lead on the surface of the lead liquid is oxidized into lead oxide;

3) conveying the lead powder after primary oxidation to a granulator for granulation and screening through a secondary cyclone separator and a bag-type dust collector pipeline by a mixing and stranding cage, wherein the diameter of granulation is phi 0.8-1.7 mm;

4) heating and oxidizing the screened qualified particles by an oxidation furnace, wherein the oxidation furnace is divided into a first temperature zone, a second temperature zone and a third temperature zone from a feed inlet, the temperatures of the first temperature zone, the second temperature zone and the third temperature zone are respectively 480-;

5) cooling the oxidized red lead, cooling to room temperature, putting the red lead into a crusher for crushing, screening the crushed red lead powder through a 350-plus 420-mesh sieve, conveying the screened finished product to a storage bin through a secondary cyclone separator and a bag-type dust collector pipeline for detection and packaging, discharging the waste gas with impurities after water spraying and dedusting, and recovering the sprayed and collected impurities into a lead melting furnace;

6) and (4) detecting that the products which are unqualified and the products which are scattered in the package enter an oxidation furnace for reoxidation.

2. The process of claim 1, wherein dust is removed by a bag-type dust remover in the granulation and oxidation processes, the solid particles recovered by dust removal are recovered to a powder making furnace for re-primary oxidation to make powder, the waste gas is filtered by a high efficiency filter, the waste is recovered, and the waste gas is subjected to water spraying for dust reduction to discharge tail gas.

3. The process for preparing the red lead according to claim 1, wherein induced draft fans are arranged at the secondary cyclone separator and the bag-type dust collector.

4. The process for preparing red lead according to claim 1 or 3, wherein the bag-type dust collector and the oxidation furnace are both in a negative pressure state.

Technical Field

The invention relates to the field of red lead preparation, in particular to a red lead preparation process.

Background

The product produced by the red lead system is red lead (Pb3O4), which is also called red lead, red lead and fresh orange red heavy powder. The method is widely applied to the industries of national defense, ceramics, glass, medicine, rust prevention and storage batteries. In recent years, due to the development of the automobile industry, the modification of starting power and the fact that products are turned into lead-acid power batteries, the lead oxide becomes an indispensable and alternative main product, and the red lead can improve the initial capacity of the batteries and change the particle size of lead paste, so that the acid absorption rate is improved, and the formation speed is accelerated.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a red lead preparation process which is simple in process, convenient to operate, in a negative pressure state and free of environmental pollution.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

a red lead preparation process comprises the following steps:

1) manually placing the electrolytic lead on a conveying belt to enter a lead melting furnace for melting, heating the melting furnace to 400-440 ℃, and melting the electrolytic lead into a liquid state;

2) liquid lead flows into a subsequent powder making furnace through a closed pipeline, air is introduced into the powder making furnace at the speed of 6-10L/min, the lead melting process is totally closed, lead-free smoke dust is generated, all materials are completely transferred, lead-free slag is generated, lead liquid is centrifugally stirred and rotated at high speed in the powder making furnace, the temperature is controlled to be 450-grade and 480 ℃, under the environment of negative pressure, outside air is sucked into the furnace, an impeller rotates to enable the lead liquid and the air to be fully contacted to generate fine lead powder with required oxidation degree, and lead on the surface of the lead liquid is oxidized into lead oxide;

3) conveying the lead powder after primary oxidation to a granulator for granulation and screening through a secondary cyclone separator and a bag-type dust collector pipeline by a mixing and stranding cage, wherein the diameter of granulation is phi 0.8-1.7 mm;

4) heating and oxidizing the screened qualified particles by an oxidation furnace, wherein the oxidation furnace is divided into a first temperature zone, a second temperature zone and a third temperature zone from a feed inlet, the temperatures of the first temperature zone, the second temperature zone and the third temperature zone are respectively 480-;

5) cooling the oxidized red lead, cooling to room temperature, putting into a crusher for crushing, screening the crushed red lead powder through a 20-50-mesh sieve, conveying the screened finished product to a storage bin through a secondary cyclone separator and a bag-type dust collector pipeline for detection and packaging, discharging the waste gas with impurities after water spraying and dedusting, and recovering the sprayed and collected impurities into a lead melting furnace;

6) and (4) detecting that the products which are unqualified and the products which are scattered in the package enter an oxidation furnace for reoxidation.

As an improvement, the steps are all completed in a sealing negative pressure state.

As an improvement, the dust is removed by a bag-type dust remover in the processes of granulation and oxidation in an oxidation furnace, solid particles recovered by dust removal are recovered to a powder making furnace for primary oxidation powder making again, waste gas is filtered by a high-efficiency filter, waste materials are recovered, and the waste gas is subjected to water spraying, dust falling and tail gas discharge.

As an improvement, draught fans are arranged at the secondary cyclone separator and the bag-type dust collector.

As an improvement, the bag-type dust collector and the oxidation furnace are in a negative pressure state.

The invention has the beneficial effects that:

the invention has simple process, the whole process is in a closed and negative pressure state, the environment is not polluted, the problem that the powder has small specific gravity and floats can be prevented by adding the granulating step in the intermediate preparation process, the dust can be removed and recovered in the whole process, the waste can be recovered, the resource can be saved, the environment can be prevented from being polluted, the oxygen concentration can be improved, and the oxidation yield of the product can be increased.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The invention is illustrated below by means of specific examples, without being restricted thereto.