Abstract: A magnetic writing book including a writing book body and a metal iron sheet with one side being provided with a backing. The writing book body includes a book back cover, a book back cover and a cylindrical permanent magnet. The backing is pasted on a wall surface or an object with non-magnetic attraction, and the magnetic writing book with adhesion on any non-metal wall surface is realized. One end of the cylindrical permanent magnet is fixedly connected with the book back cove, an other end of the cylindrical permanent magnet penetrates an upper half of each page of the writing pages.

Abstract: The invention provides a method for producing titanium tetrachloride by using a low grade titanium material, and belongs to the chemical field. The technical problem to be solved is to provide a method for producing titanium tetrachloride by using a low grade titanium material capable of continuous industrialized production. The method is characterized in that the low grade titanium material containing a certain proportion of titanium carbide is caused to directly react with chlorine at 600-700° to produce the titanium tetrachloride. Long-time continuous and stable operation can be realized by using the process parameters of the method, and chlorination rate of the titanium carbide in the titanium material reaches above 90%, so that the titanium material can be better used for producing the titanium tetrachloride.