yoyocrusher's blog

Crusher For Minings is the waste harmful to human health and environment if they are processed improperly during the operation, storage, transportation and production process. Urbanization and industrialization of our country increase dramatically the social material consumption and a large amount of waste at the same time. Some industrial or medical wastes need special processing because of their great harm to human, animals and environment.

Nowadays, the incineration method is thought to be the most efficient and most common way to handle the hazardous wastes because it can realize reduction, harmlessness and recycling at the same time of dealing with them. But with the increasing of dangerous wastes and handling scale, the experts begin to adopt rotary kiln to deal with wastes.

Because the wastes processing technology with rotary kiln is not mature enough, there are a series of technical problems during the process:

1. Hazardous wastes have 47 categories among which some of them many have chemical reaction with each other. They may explode and produce heat and poisonous gases like acid, alkali and cyanide if handled improperly. So if we want to handle them safely, we should do a good job in waste ingredients based on their chemical and physical features.

2. There is a big difference in heat value and stability of hazardous wastes, so we should explore different feeding areas and feeding styles of different materials in order to burn wastes fully and make full use of waste's heat value.

3. Solid waste has a complex composition and a big calorific value difference, which may cause the phenomenon 'suddenly hot or cold' in kiln and the contradiction between waste disposal and kiln stability.

4. Cement kiln is very sensitive to halogen elements and alkaline substance, and it will have a serious influence on cement quality if added improperly. So we should determine the burning rate of halogen and alkali materials by a lot of experiments.

Each major production accidents are related to our carelessness on the details maintenance of the machine in the daily life. Production safety is not just paying lip service, must put to action. Rotary dryer is prone to displacement phenomenon in the production process, so we should do the daily maintenance more carefully. Here are two methods to prevent displacement of the Sand Making Machine News.

experts will tell you how to solve the displacement of rotary dryer:

First, when the displacement of rotary dryer cylinder appears, the cylinder belt will tilted walk on the side of supporting wheel, instead of parallel transport. This phenomenon is generally the result of wear between the wheel belt and supporting wheel, which damages the balance of cylinder installation angle (normally 5 degree). So we can adjust the angle of any set of supporting wheel according to the rotation direction of cylinder. In this way the cylinder can return to normal.

Second, use this method when the cylinder displacement is not big. When the cylinder moves down, we need to inwards parallel move the after supporting wheel, and appropriately increase the rear of cylinder. Improve less than 8 degrees till reset. We can improve the after supporting wheel to increase the contact areas between the supporting wheel and belt, and then move the cylinder back to reset. When the cylinder moves up, we can inwards parallel adjust the front supporting wheel.

In order to adapt to the fluctuation of the volume and concentration of the pulp in hydraulic mining, Henan Aggregate Crushing Solution Machinery designs the fractionation box with a double inclined plate. The classification size is determined by the speed of the upflow velocity of the lower inclined plate. When it is used for the classification of the material of 0.28mm, the comprehensive classification efficiency of the two boxes up and down is kept around 80%. The inclined plate of the device is mainly used to uniformly distribute the upward flow. The packing plate distance is 100-200mm and the length of the plate is 400-600mm.

The thickening or classification equipment of the aforementioned old inclined plate ( inclined tube) relies on the shallow subsidence to shorten the falling distance and falling time of the particles, which can significantly improve the handling capacity of per unit area of the equipment that once formed a high tide of the promotion and application at home and abroad. However, with the extension of the usage time, the drawbacks of such devices are gradually becoming apparent, which mainly show uneven fabric between the board. In addition, the bond slime on the board can not decline freely so that the gap between the boards is blocked, which affect the normal production until it can not be used. The main reasons are the followings. First, the inclined plates fail to form an independent operating unit and channel. The way of feeding and nesting are both open, which can not ensure that each plate has the same hydraulics characteristics. Second, the material is subpar. Most of the material is steel, glass or plastic plate whose surface is rough which is easy to bong slime. Third, the structure of the device is complex. It can not be integrated according to the requirements. The manufacturing, installation and use is inconvenient. Forth, the plate spacing is too large, but the length of the plate is too small, which causes that the shallow subsidence utility is limited. In the late 1980s, the popularization and application of these devices is from slow to standstill. After many years' research and application, Henan Mining Machinery independently researched and developed KMLF tilting narrow upflow classifier and it was successfully applied in 1999 in the titanium plant. The research is groundbreaking, which makes the tilting narrow upflow classification technology move a major step with a broad application prospects.