One-off manufacturing technology of chromium compounds and new products in many industries by liquid phase method of ferrochromium

Abstract

The invention relates to a one-off manufacturing technology of chromium compounds and new products in many industries by a liquid phase method of ferrochromium and belongs to the technical field of new chemical materials with metallurgical products used as raw materials to manufacture chromium compounds, iron series pigments, new silicon materials, new photovoltaic materials and new energy. The technology provided by the invention is advanced, energy-saving and environmentally friendly, and there is no discharge of waste residues, exhaust gas or wastewater. High temperature and high pressure are not required. Ferrochromium is used as a raw material to produce products such as chromium compounds, pigments, new energy, new silicon carbon battery materials and the like by a liquid phase method at a time, thus forming a series of new high-end industrial chains and thoroughly changing situations of single application and pure production of ferrochromium in the prior art. The backward production technology that original chromate compound roasting production generates high pollution which is greatly harmful to the environment is changed. Production of chromate compounds has embarked on an energy-saving and high-efficiency development road. Diversified development and application fields of the ferrochromium industry are greatly expanded, international competitiveness of enterprises is greatly enhanced and national industrial upgrading and optimization and development are promoted. The technology provided by the invention is of great significance. The technology accords with requirements of modern green economic development and has great enterprises economic benefits, perfection benefits and social benefits.

Description

technical field [0001] The invention relates to a process for producing multi-industry new products of chromium compounds at one time by ferrochrome liquid phase method, which belongs to the technical field of new chemical materials for producing chromium compounds, iron-based pigments, new silicon materials, new photovoltaic materials and new energy sources using metallurgical products as raw materials . Background technique [0002] Ferrochrome is smelted from chromite ore, and is mainly used as an additive for steelmaking and in the production of stainless steel. Chromite ore is mainly used to produce ferrochromium, chemical chromium salts and refractory materials. Total global ferrochrome production reached 9.7 million tonnes in 2012, up from 9.1 million tonnes in 2011, mainly due to increased production in China. Ferrochrome is an important raw material for stainless steel. China's ferrochromium production will account for 32%-33% of the global total, and South Afric...

AI Technical Summary

Problems solved by technology

[0008] At present, chromium salt enterprises at home and abroad are completely using calcium or less calcium roasting methods to produce chromate, as well as the chromium salt production technology that is being trial-produced and promoted in China: sodium chromate produced by alkali-dissolving oxidation of ferrochrome, pneumatic fluidized tower continuous Liquid-phase oxidation method for chromate, potassium or sodium sub-molten salt liquid-phase oxidation method for chromate production requires high temperature and high pressure, excessive sodium or potassium alkali consumption, high cost of reaction vessel, difficult manufacturing, high production cost, low profit or loss, difficult to industrialize production

The production process produces a large amount of chromium slag, which is costly and difficult to deal with, which seriously restricts the development of enterprises and industrial upgrading

[0009] Asia's largest chromate manufacturer Sichuan Yinhe Chemical invented "a production method of high-quality red alum sodium". Application number: 201310113700.7, publication number: CN103193271A, publication date: 2013.07.10. A large amount of alkali has extremely high requirements on the container, the cost of the reaction container is high, the damage to the container is great during the production process, and it is easy to cause safety hazards

Due to the high production cost, there is only a single product, sodium chromate, and at the same time, the toxic chromium slag is difficult to deal with, and it is difficult to industrialize production