For large and medium-sized cyanide gold extraction plants, the tailings can be alkaline chlorination or acid chloride. For example, cyanide tailings from a gold mine in Hebei Province, using lime added, chlorine gas under alkaline conditions (pH 9 ~ 11), tail sl…

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Regional distribution of the crankshaft industry

The crankshaft is an important part of the engine and the working environment is harsh. Especially for automotive diesel engines, the machining accuracy, toughness and strength of the crankshaft are higher than…

[Chinese instrument network meter patent] creative limit, instrumentation invention. Today, we introduce a national invention-invented patent - a smart water meter with leakage monitoring function. The patent was applied for by Yuhuan Hongri Valve Co., Ltd. and was authorized to issue on Decemb…

It is inevitable to develop according to the market, but it can't be comprehensive. It can only choose the targeted development that suits the company's own conditions and meets the market demand. Combining its own brand positioning and highlighting the needs of certain market levels, i…

I. Introduction

Iron steel led to the rapid development of China's development of electrolytic manganese industry, as of June 2006, China's ma…

Introduction of constant temperature and humidity test chamber

Constant temperature and humidity test chamber has been widely used in the electronics industry, national defense science and technology, chemical industry, machinery manufacturing, aerospace and other fields. Its produ…