Four Effective Ways to Improve Soil Fertility

Four Effective Ways to Improve Soil Fertility Plants and roots, soil, and soil organisms that grow on the ground are interdependent and interact with each other to form a soil ecosystem. Soil organisms are the most important and most active part of the soil biological system. They play

·The car recalled 10 million vehicles

Looking back on the past 2016, while the production and sales of the Chinese auto market exceeded 28 million units, the recall volume also exceeded 10 million for the first time. With such a large amount of recall and growth rate, what is the nature of the recall? Is it a fig leaf that covers the r

Basic theory of leaching process in wet zinc smelting (1)

Dip [1~3,7,8] A wet process is the primary leach zinc refining. In this aspect of the process To feedstock zinc and tin and other valuable metals dissolved completely as possible, so that it goes into solution, in order to achieve high metal recoveries. On the other hand, at the end of the leachin

A brief history of cobalt mining

The application of cobalt minerals has a long history. Before the Era, the Egyptians used cobalt blue as a coloring agent for ceramic products. Since the Tang Dynasty, cobalt compounds have been widely used as colorants in ceramic production. In 1735, the Swedish chemist Brandt first isolated cobal

Disc vacuum filter

(1) Vertical disc vacuum filter The vertical disk vacuum filter, also known as the butterfly vacuum filter (Figs. 1 and 2), has a different filtering surface configuration than the cylindrical filter, but the operating principle is basically the same. The filtering surface is composed of a plu

Equipment planning and maintenance system

1. All equipment should be developed according to the actual situation after operation. 2. The overhaul plan includes overhaul, medium repair, minor repair, and equipment overhaul plan. Each workshop will make the next year's overhaul plan before December 20th of each workshop. The medium repa