DD283280A7 - PROCESS FOR PRODUCING SHAPED ACTIVE CARBON - Google Patents

Abstract

The invention relates to a process for producing shaped activated carbon of high mechanical strength. The starting materials are process-related abrasion in the various processes of shaping or grain activated carbon production, active carbon monoxide waste products, spent decalcifying carbon of the various fields of application and loaded pulverized coal of the water purification processes. According to the process of the invention, the incorporation of the active material into siliceous materials and / or clays takes place. Stable moldings are obtained without the use of binders by intimately mixing the finely ground components, followed by mashing with water, deformation at 5 to 20 MPa, drying and carbonization at a slower temperature increase to 450C, sintering and gas cooling. The thermal treatment is carried out under low-oxygen flue gas. The sorption properties are influenced by the mixing ratios {activated charcoal; absorption characteristic; manufacture; waste products; abrasion; Powder coal}

Description

Field of application of the invention

The invention relates to a process for the production of molded activated carbon of high mechanical strength using the process-related abrasion in the production of coal and / or in industrial processes resulting active ash or dusts and / or spent decolorizing, z. As the starch processing industry or launched powdered coal water purification processes.

Characteristic of the known technical solutions

The problem of the use of process-related accumulating abrasion in the various processes of molding or Kornaktivkohleherstellung under the aspect of the fullest possible use of the carbon material used for the desired end product, is due to increasing resource shortage and the need to optimize known basic process in terms of their economics, worldwide attention ,

There is also increasing interest in processes involving the use of inferior quality active carbon material, such as the by-product of industrial processes L-B. the generation of synthesis gas according to the Winkler process arises, seek (GP-PS 196866) or such procedural solutions that aim to avoid difficult to control and expensive regeneration processes.

In JP-PS 58110412 a method is described, such as so-called waste powder activated carbon by mixing with bentonite and inorganic binders after subsequent deformation and calcination can find a targeted use as a form or grain coal. Due to the use of binders of inorganic nature results in a product that has much lower activity than the original derivative by the dilution effect and pore closure. This effect is further supported by the use of high deformation pressures. These pressures are necessary because the calcination alone does not achieve high dimensional stability.

Object of the invention

The invention has the aim of the process-related incurred in the production of molded or grain activated carbon abrasion or active ashes and dusts or spent powdered carbon so that after a simple, easy to control process with high economic effect and under Erroichen a high degree of sophistication a shape - or grain carbon can be produced, which can be used for a variety of applications.

Explanation of the essence of the invention

The invention has for its object to provide a method, processed by the active, powdery technological waste products of activated carbon or active, powdery carbon monoxide products with high ash content or spent powdered coal of different provenances without conventional addition of binders to form activated carbon and optionally subjected to regeneration can.

According to the invention, the object is achieved in that the dry present in powder form or wet mud product intimately mixed with finely ground toluene and / or clays, kneaded with addition of water to a moldable mass, compressed at 6 to 20MPa, under oxygen-poor flue gas at a uniform temperature rise to Carbonization heated, sintered with further increase in temperature and then gas-cooled. The mixing ratio of carbon component to clay and / or alumina is a maximum of 8: 2.

The sintering temperature is 800 to 1100 ^° C. depending on the provenance of the clay or clay and the mixing ratio in a multicomponent system. The addition of water not only enables the production of a deformable mass, but at the same time prevents penetration by filling the pore volume in this process step of foreign substances and thus a reduction of the adsorption potential. The addition of water, a high suppleness of the mash is achieved and thus affects the smoothness and regularity of the resulting moldings. This property is retained if the temperature increase during the drying process or - this is especially true when using charged coals or unwashed Abprodukte the Winklerprozesses - up to 45O ⁰ C at a rate of 6 to 10K · min ' ¹ , preferably 7, BK · min ' ¹ , is heated. The sorption properties are controllable by changing the mixture ratio. It is noteworthy that the methylene blue absorption remains virtually unchanged up to 50% by weight addition of clay substance compared to the original product. Phenol and iodine sorption reach levels of up to 150 mg / g active substance above the expected level of mixture. These sorption values are to be optimized by adding clays.

AusfOhrungsbelsplelo example 1

400g of clay were mixed with 600g activated carbon of the variety KO with don characteristics

Methylene blue titre: ml / 100 mg 11.8 Iodosorption: mg / g 641 Ash content:% 11.2 Phenol sorption C ₁₀ : mg / 1 95

placed in a kneader, mixed with 550ml of water and kneaded for 30min. A smooth, compressible mash was obtained, which was then pressed at a pressing pressure of 17 MPa using a 2.2 mm diameter die into smooth, very firm shapes.

The resulting moldings were placed in a reaction tube, which in an indirectly heated laboratory rotary kiln

was introduced. Under low-oxygen flue gas was dried, at a speed of 10K

heated and sintered after further heating to 900 ⁰ C for 10 minutes. The cooling was carried out by passing nitrogen over.

The product obtained is characterized by the following properties:

methylene blue: ml / 100 mg 11.8 Jodsorption: ml / g 420 Phenol sorption C _{1 | 0} : mg / l 120 tap density: g / ml 0.59 abrasion: % 0.9

Example 2 In compliance with the mixing ratio (based on dry matter) of clay! Activated carbon - 3: 7 was accordingly Example 1 proceed. The incorporated activated carbon had the following initial values: Methylene blue titre: ml / 100 mg 10.5 Iodosorption: mg / g 547 Ash content:% 11,8 Phenol sorption C ₁₀ : mg / 1 115 An end product of the following quality was obtained: Methylene blue titre: ml / 100mg 11.0 Iodosorption: mg / g 502 Phenol sorption Ci, ₀ : mg / 1 140

Claims (5)

1. A process for the production of molded activated carbon using powdered technological waste products of activated carbon production and / or carbon monoxide odor exhausted powdered activated carbon, characterized in that the dry present in powder or wet mud product intimately mixed with finely ground clays and / or clays, with addition of water kneaded, pressed, dried under low-oxygen flue gas and uniform increase in temperature and carbonized, heated to sintering temperature and then connected to a mouldable mass. gas is cooled. 2. The method according to claim 1, characterized in that the mixing ratio of carbon component to clay and / or alumina maximum 8: 2. 3. The method according to claim 1 and 2, characterized in that the pressing pressure is 5 to 20 MPa. 4. The method according to claim 1 to 3, characterized in that is heated to the carbonization at a rate of 6 to 10K · min " ¹ , preferably 7.5K · min" ¹ . 5. The method according to claim 1 to 4, characterized in that the sintering temperature, depending on the provenance of the clay or clay and depending on the mixing ratio in a multi-component system 800 to 1100 ⁰ C.