In August, it was the last month of the off-season in the traditional sense. According to the sales data released by the CLUCC, the auto market has already shown signs of recovery. As for the joint venture brands, Japanese cars have a strong momentum. For example, Dongfeng Honda has maintained a h

Iron tailings curing method comprising the steps of: â‘  mixing the following parts by weight of a curing agent and additives: 4 to 40 parts of curing agent and the additive 0.01 to 2.0 parts by uniformly mixed, and then grinding; â‘¡ mixture produced, in the step â‘  The mixture is mixe

The new energy automobile industry has risen to the height of China's national strategy. It has become a consensus to rely on the development of new energy vehicles to realize the long-standing dream of building a strong automobile country. With the concerted efforts of all sectors of the

The construction method of gentle slope and inclined slope with angle less than 5.5° is similar to that of roadway. (1) Construction of Pingyudongkou 1. The distance between the top of the tunnel section and the bottom of the pile or the bottom of the tillage layer should not be less than 3m.

As the mining method of the caving mining method is released with the recovery, the position occupied by the overburden caving and the original ore is filled with the goaf, so the mining operation of the caving mining method has its own characteristics. (1) The pressure of the mining roadway with

Analysis of quasi-secondary compression cycle characteristics of common refrigeration compressors in petrochemical equipment test Xu Shuxue, Ma Guoyuan, Peng Yu (Beijing University of Technology, Beijing 100124) The performance of the cycle. The gas-inductive characteristics and cycle performance

First, the analysis of the direct top The completeness of the direct roof depends on two factors: one is the mechanical properties of the rock formation itself, and the other is the development of the bedding and fissures caused by various reasons in the direct top rock stratum. The initial slump

The purpose of the analysis and evaluation of open pit slope stability is to design and form an optimal slope that makes open pit production safe and economical. The following procedures are generally followed for slope stability analysis and evaluation: (1) Investigation, analysis and evaluation

The century-old mining cloud tin mines are mainly located in the eastern part of old mining area, which is rich in underground resources, mainly metal tin, copper, lead, zinc, tungsten, etc., still has a good exploration prospects within the mining area. Mining mining has been using traditional equ

Ca 5 [PO 4 ] 3 (F, OH) [Chemical composition] Ca in the composition can be replaced by rare earth elements (mainly Ce) and trace elements Sr as incomplete isomorphisms. The rare earth content is generally not more than 5%. According to different additional anions, apatite divided into the following

The main reason why fine particles are difficult to float: (1) The surface energy of the fine particles is large, and under certain strips, fine particles of different compositions form non-selective condensation. The agglomeration caused by the surface force also causes the adhesion of the fine pa

Mg 3 [Si4O 10 ](OH) 2 [Chemical composition] The chemical composition is relatively stable, Si is sometimes replaced by Al, and Mg can be replaced by Fe, Mn, Ni, and Al. [Crystal structure] TOT type, three octahedral type. Multi-type phenomenon has yet to be studied, and it is more likely to use 2